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Grivalský T, Lakatos GE, Štěrbová K, Manoel JAC, Beloša R, Divoká P, Kopp J, Kriechbaum R, Spadiut O, Zwirzitz A, Trenzinger K, Masojídek J. Poly-β-hydroxybutyrate production by Synechocystis MT_a24 in a raceway pond using urban wastewater. Appl Microbiol Biotechnol 2024; 108:44. [PMID: 38180554 DOI: 10.1007/s00253-023-12924-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Revised: 10/16/2023] [Accepted: 10/24/2023] [Indexed: 01/06/2024]
Abstract
Poly-β-hydroxybutyrate (PHB) is a potential source of biodegradable plastics that are environmentally friendly due to their complete degradation to water and carbon dioxide. This study aimed to investigate PHB production in the cyanobacterium Synechocystis sp. PCC6714 MT_a24 in an outdoor bioreactor using urban wastewater as a sole nutrient source. The culture was grown in a thin-layer raceway pond with a working volume of 100 L, reaching a biomass density of up to 3.5 g L-1 of cell dry weight (CDW). The maximum PHB content was found under nutrient-limiting conditions in the late stationary phase, reaching 23.7 ± 2.2% PHB per CDW. These data are one of the highest reported for photosynthetic production of PHB by cyanobacteria, moreover using urban wastewater in pilot-scale cultivation which multiplies the potential of sustainable cultivation approaches. Contamination by grazers (Poterioochromonas malhamensis) was managed by culturing Synechocystis in a highly alkaline environment (pH about 10.5) which did not significantly affect the culture growth. Furthermore, the strain MT_a24 showed significant wastewater nutrient remediation removing about 72% of nitrogen and 67% of phosphorus. These trials demonstrate that the photosynthetic production of PHB by Synechocystis sp. PCC6714 MT_a24 in the outdoor thin-layer bioreactor using urban wastewater and ambient carbon dioxide. It shows a promising approach for the cost-effective and sustainable production of biodegradable carbon-negative plastics. KEY POINTS: • High PHB production by cyanobacteria in outdoor raceway pond • Urban wastewater used as a sole source of nutrients for phototrophic growth • Potential for cost-effective and sustainable production of biodegradable plastics.
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Affiliation(s)
- Tomáš Grivalský
- Institute of Microbiology of the Czech Academy of Sciences, Centre Algatech, Laboratory of Algal Biotechnology, Novohradská 237, Třeboň, Czech Republic.
| | - Gergely Ernő Lakatos
- Institute of Microbiology of the Czech Academy of Sciences, Centre Algatech, Laboratory of Algal Biotechnology, Novohradská 237, Třeboň, Czech Republic
| | - Karolína Štěrbová
- Institute of Microbiology of the Czech Academy of Sciences, Centre Algatech, Laboratory of Algal Biotechnology, Novohradská 237, Třeboň, Czech Republic
| | - João Artur Câmara Manoel
- Institute of Microbiology of the Czech Academy of Sciences, Centre Algatech, Laboratory of Algal Biotechnology, Novohradská 237, Třeboň, Czech Republic
- Faculty of Science, University of South Bohemia, Branišovská 1645/31a, České Budějovice, Czech Republic
| | - Romana Beloša
- Institute of Microbiology of the Czech Academy of Sciences, Centre Algatech, Laboratory of Algal Biotechnology, Novohradská 237, Třeboň, Czech Republic
| | - Petra Divoká
- Institute of Microbiology of the Czech Academy of Sciences, Centre Algatech, Laboratory of Algal Biotechnology, Novohradská 237, Třeboň, Czech Republic
| | - Julian Kopp
- Technische Universität Wien, Institute of Chemical, Environmental and Bioscience Engineering, Research Division Biochemical Engineering, Getreidemarkt 9, Vienna, Austria
| | - Ricarda Kriechbaum
- Technische Universität Wien, Institute of Chemical, Environmental and Bioscience Engineering, Research Division Biochemical Engineering, Getreidemarkt 9, Vienna, Austria
| | - Oliver Spadiut
- Technische Universität Wien, Institute of Chemical, Environmental and Bioscience Engineering, Research Division Biochemical Engineering, Getreidemarkt 9, Vienna, Austria
| | - Alexander Zwirzitz
- Biosciences Research Group, University of Applied Sciences, Stelzhamerstraße 23, Wels, Austria
| | - Kevin Trenzinger
- Biosciences Research Group, University of Applied Sciences, Stelzhamerstraße 23, Wels, Austria
| | - Jiří Masojídek
- Institute of Microbiology of the Czech Academy of Sciences, Centre Algatech, Laboratory of Algal Biotechnology, Novohradská 237, Třeboň, Czech Republic
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Schaubeder JB, Fürk P, Amering R, Gsöls L, Ravn J, Nypelö T, Spirk S. Deciphering heterogeneous enzymatic surface reactions on xylan using surface plasmon resonance spectroscopy. Carbohydr Polym 2024; 337:122137. [PMID: 38710567 DOI: 10.1016/j.carbpol.2024.122137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2023] [Revised: 03/07/2024] [Accepted: 04/05/2024] [Indexed: 05/08/2024]
Abstract
Xylans' unique properties make it attractive for a variety of industries, including paper, food, and biochemical production. While for some applications the preservation of its natural structure is crucial, for others the degradation into monosaccharides is essential. For the complete breakdown, the use of several enzymes is required, due to its structural complexity. In fact, the specificity of enzymatically-catalyzed reactions is guided by the surface, limiting or regulating accessibility and serving structurally encoded input guiding the actions of the enzymes. Here, we investigate enzymes at surfaces rich in xylan using surface plasmon resonance spectroscopy. The influence of diffusion and changes in substrate morphology is studied via enzyme surface kinetics simulations, yielding reaction rates and constants. We propose kinetic models, which can be applied to the degradation of multilayer biopolymer films. The most advanced model was verified by its successful application to the degradation of a thin film of polyhydroxybutyrate treated with a polyhydroxybutyrate-depolymerase. The herein derived models can be employed to quantify the degradation kinetics of various enzymes on biopolymers in heterogeneous environments, often prevalent in industrial processes. The identification of key factors influencing reaction rates such as inhibition will contribute to the quantification of intricate dynamics in complex systems.
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Affiliation(s)
- Jana B Schaubeder
- Graz University of Technology, Institute of Bioproducts and Paper Technology (BPTI), Inffeldgasse 23, 8010 Graz, Austria
| | - Peter Fürk
- Graz University of Technology, Institute for Chemistry and Technology of Materials (ICTM), Stremayrgasse 9, 8010 Graz, Austria
| | - Richard Amering
- Graz University of Technology, Institute of Bioproducts and Paper Technology (BPTI), Inffeldgasse 23, 8010 Graz, Austria
| | - Lena Gsöls
- Graz University of Technology, Institute of Molecular Biotechnology, Petersgasse 14, 8010 Graz, Austria; The COMET Center, Acib GmbH, Krenngasse 37, 8010 Graz, Austria
| | - Jonas Ravn
- Chalmers University of Technology, Department of Life Sciences, 412 96 Gothenburg, Sweden
| | - Tiina Nypelö
- Chalmers University of Technology, Department of Chemistry and Chemical Engineering, 412 96 Gothenburg, Sweden; Aalto University, Department of Bioproducts and Biosystems, Vuorimiehentie 1, 02150 Espoo, Finland
| | - Stefan Spirk
- Graz University of Technology, Institute of Bioproducts and Paper Technology (BPTI), Inffeldgasse 23, 8010 Graz, Austria.
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Mohammadi N, Alikhasi Amnieh Y, Ghasemi S, Karbasi S, Vaezifar S. Evaluation of the effects of decellularized extracellular matrix nanoparticles incorporation on the polyhydroxybutyrate/nano chitosan electrospun scaffold for cartilage tissue engineering. Int J Biol Macromol 2024; 273:133217. [PMID: 38897519 DOI: 10.1016/j.ijbiomac.2024.133217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2024] [Revised: 06/07/2024] [Accepted: 06/15/2024] [Indexed: 06/21/2024]
Abstract
Recent research focuses on fabricating scaffolds imitating the extracellular matrix (ECM) in texture, composition, and functionality. Moreover, specific nano-bio-particles can enhance cell differentiation. Decellularized ECM nanoparticles possess all of the mentioned properties. In this research, cartilage ECM, extracted from the cow's femur condyle, was decellularized, and ECM nanoparticles were synthesized. Finally, nanocomposite electrospun fibers containing polyhydroxybutyrate (PHB), chitosan (Cs) nanoparticles, and ECM nanoparticles were fabricated and characterized. TEM and DLS results revealed ECM nanoparticle sizes of 17.51 and 21.6 nm, respectively. Optimal performance was observed in the scaffold with 0.75 wt% ECM nanoparticles (PHB-Cs/0.75E). By adding 0.75 wt% ECM, the ultimate tensile strength and elongation at break increased by about 29 % and 21 %, respectively, while the water contact angle and crystallinity decreased by about 36° and 2 %, respectively. Uneven and rougher surfaces of the PHB-Cs/0.75E were determined by FESEM and AFM images, respectively. TEM images verified the uniform dispersion of nanoparticles within the fibers. After 70 days of degradation in PBS, the PHB-Cs/0.75E and PHB-Cs scaffolds demonstrated insignificant weight loss differences. Eventually, enhanced viability, attachment, and proliferation of the human costal chondrocytes on the PHB-Cs/0.75E scaffold, concluded from MTT, SEM, and DAPI staining, confirmed its potential for cartilage tissue engineering.
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Affiliation(s)
- Nayereh Mohammadi
- Department of Biomaterials and Tissue Engineering, School of Advanced Technologies in Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Yasamin Alikhasi Amnieh
- Department of Veterinary Histology, School of Veterinary, Shahrekord University, Shahrekord, Iran
| | - Saeid Ghasemi
- Department of Biomaterials and Tissue Engineering, School of Advanced Technologies in Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Saeed Karbasi
- Department of Biomaterials and Tissue Engineering, School of Advanced Technologies in Medicine, Isfahan University of Medical Sciences, Isfahan, Iran.
| | - Sedigheh Vaezifar
- Department of Medical Engineering, Payame Noor University, Tehran, Iran
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Viel T, Cocca M, Esposito R, Amato A, Russo T, Di Cosmo A, Polese G, Manfra L, Libralato G, Zupo V, Costantini M. Effect of biodegradable polymers upon grazing activity of the sea urchin Paracentrotus lividus (Lmk) revealed by morphological, histological and molecular analyses. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 929:172586. [PMID: 38657802 DOI: 10.1016/j.scitotenv.2024.172586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 03/28/2024] [Accepted: 04/17/2024] [Indexed: 04/26/2024]
Abstract
In the last years biodegradable polymers (BPs) were largely used as real opportunity to solve plastic pollution. Otherwise, their wide use in commercial products, such as packaging sector, is causing a new pollution alarm, mainly because few data reported about their behaviour in the environment and toxicity on marine organisms. Our previous results showed that embryos of the sea urchin Paracentrotus lividus (Lmk) exposed to poly(ε-caprolactone) (PCL), poly(3-hydroxybutyrate) (PHB) and poly(lactic acid) (PLA) showed delay of their development and morphological malformations, also affecting at the molecular levels the expression of several genes involved in different functional responses. In the present work for the first time, we tested the effects of five microplastics (MPs) obtained from BPs such as PBS, poly(butylene succinate), PBSA, poly(butylene succinate-co-butylene adipate), PCL, PHB and PLA, upon grazing activity of the sea urchin revealed by: i. histological analysis seeing at the gonadic tissues; ii. morphological analysis of the deriving embryos; iii. molecular analyses on these embryos to detect variations of the gene expression of eighty-seven genes involved in stress response, detoxification, skeletogenesis, differentiation and development. All these results will help in understanding how MP accumulated inside various organs in the adult sea urchins, and more in general in marine invertebrates, could represent risks for the marine environment.
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Affiliation(s)
- Thomas Viel
- Department of Ecosustainable Marine Biotechnology, Stazione Zoologica Anton Dohrn, Villa Comunale, 80121 Napoli, Italy; Institute for Polymers, Composites and Biomaterials, National Research Council of Italy, Via Campi Flegri, 34, 80078 Pozzuoli, Napoli, Italy; Department of Biology, University of Naples Federico II, Via Cinthia 26, 80126 Napoli, Italy
| | - Mariacristina Cocca
- Institute for Polymers, Composites and Biomaterials, National Research Council of Italy, Via Campi Flegri, 34, 80078 Pozzuoli, Napoli, Italy
| | - Roberta Esposito
- Department of Ecosustainable Marine Biotechnology, Stazione Zoologica Anton Dohrn, Villa Comunale, 80121 Napoli, Italy
| | - Amalia Amato
- Department of Ecosustainable Marine Biotechnology, Stazione Zoologica Anton Dohrn, Villa Comunale, 80121 Napoli, Italy; Department of Biology, University of Naples Federico II, Via Cinthia 26, 80126 Napoli, Italy
| | - Tania Russo
- Department of Biology, University of Naples Federico II, Via Cinthia 26, 80126 Napoli, Italy
| | - Anna Di Cosmo
- Department of Biology, University of Naples Federico II, Via Cinthia 26, 80126 Napoli, Italy
| | - Gianluca Polese
- Department of Biology, University of Naples Federico II, Via Cinthia 26, 80126 Napoli, Italy
| | - Loredana Manfra
- Department of Ecosustainable Marine Biotechnology, Stazione Zoologica Anton Dohrn, Villa Comunale, 80121 Napoli, Italy; Institute for Environmental Protection and Research (ISPRA), Via Vitaliano Brancati 48, 00144 Rome, Italy
| | - Giovanni Libralato
- Department of Ecosustainable Marine Biotechnology, Stazione Zoologica Anton Dohrn, Villa Comunale, 80121 Napoli, Italy; Department of Biology, University of Naples Federico II, Via Cinthia 26, 80126 Napoli, Italy
| | - Valerio Zupo
- Stazione Zoologica, Sustainable Biotechnology Department. Ischia Marine Centre, Via Buonocore, Ischia, NA, Italy
| | - Maria Costantini
- Department of Ecosustainable Marine Biotechnology, Stazione Zoologica Anton Dohrn, Villa Comunale, 80121 Napoli, Italy.
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Arai T, Aikawa S, Sudesh K, Arai W, Mohammad Rawi NF, Leh CPP, Mohamad Kassim MH, Tay GS, Kosugi A. Efficient production of polyhydroxybutyrate using lignocellulosic biomass derived from oil palm trunks by the inhibitor-tolerant strain Burkholderia ambifaria E5-3. World J Microbiol Biotechnol 2024; 40:242. [PMID: 38869634 DOI: 10.1007/s11274-024-04041-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Accepted: 05/29/2024] [Indexed: 06/14/2024]
Abstract
Lignocellulosic biomass is a valuable, renewable substrate for the synthesis of polyhydroxybutyrate (PHB), an ecofriendly biopolymer. In this study, bacterial strain E5-3 was isolated from soil in Japan; it was identified as Burkholderia ambifaria strain E5-3 by 16 S rRNA gene sequencing. The strain showed optimal growth at 37 °C with an initial pH of 9. It demonstrated diverse metabolic ability, processing a broad range of carbon substrates, including xylose, glucose, sucrose, glycerol, cellobiose, and, notably, palm oil. Palm oil induced the highest cellular growth, with a PHB content of 65% wt. The strain exhibited inherent tolerance to potential fermentation inhibitors derived from lignocellulosic hydrolysate, withstanding 3 g/L 5-hydroxymethylfurfural and 1.25 g/L acetic acid. Employing a fed-batch fermentation strategy with a combination of glucose, xylose, and cellobiose resulted in PHB production 2.7-times that in traditional batch fermentation. The use of oil palm trunk hydrolysate, without inhibitor pretreatment, in a fed-batch fermentation setup led to significant cell growth with a PHB content of 45% wt, equivalent to 10 g/L. The physicochemical attributes of xylose-derived PHB produced by strain E5-3 included a molecular weight of 722 kDa, a number-average molecular weight of 191 kDa, and a polydispersity index of 3.78. The amorphous structure of this PHB displayed a glass transition temperature of 4.59 °C, while its crystalline counterpart had a melting point of 171.03 °C. This research highlights the potential of lignocellulosic feedstocks, especially oil palm trunk hydrolysate, for PHB production through fed-batch fermentation by B. ambifaria strain E5-3, which has high inhibitor tolerance.
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Affiliation(s)
- Takamitsu Arai
- Japan International Research Center for Agricultural Sciences, 1-1, Ohwashi, Tsukuba, Ibaraki, 305-8686, Japan.
| | - Shimpei Aikawa
- Japan International Research Center for Agricultural Sciences, 1-1, Ohwashi, Tsukuba, Ibaraki, 305-8686, Japan
| | - Kumar Sudesh
- School of Biological Sciences, Universiti Sains Malaysia, Penang, 11800, Malaysia
| | - Wichittra Arai
- Japan International Research Center for Agricultural Sciences, 1-1, Ohwashi, Tsukuba, Ibaraki, 305-8686, Japan
- The National Institute of Advanced Industrial Science and Technology, 1-1-1 Umezono, Tsukuba, Ibaraki, 305-8560, Japan
| | | | - Cheu Peng Peng Leh
- School of Industrial Technology, Universiti Sains Malaysia, Penang, 11800, Malaysia
| | | | - Guan Seng Tay
- School of Industrial Technology, Universiti Sains Malaysia, Penang, 11800, Malaysia
| | - Akihiko Kosugi
- Japan International Research Center for Agricultural Sciences, 1-1, Ohwashi, Tsukuba, Ibaraki, 305-8686, Japan
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Shin Y, Kim HJ, Choi TR, Oh SJ, Kim S, Lee Y, Choi S, Oh J, Kim SY, Lee YS, Choi YH, Bhatia SK, Yang YH. Identification of Oil-Loving Cupriavidus necator BM3-1 for Polyhydroxyalkanoate Production and Assessing Contribution of Exopolysaccharide for Vegetable Oil Utilization. Polymers (Basel) 2024; 16:1639. [PMID: 38931989 DOI: 10.3390/polym16121639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2024] [Revised: 05/22/2024] [Accepted: 06/05/2024] [Indexed: 06/28/2024] Open
Abstract
Polyhydroxyalkanoates (PHA) have received attention owing to their biodegradability and biocompatibility, with studies exploring PHA-producing bacterial strains. As vegetable oil provides carbon and monomer precursors for poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (P(3HB-co-3HHx)), oil-utilizing strains may facilitate PHA production. Herein, Cupriavidus necator BM3-1, which produces 11.1 g/L of PHB with 5% vegetable oil, was selected among various novel Cupriavidus necator strains. This strain exhibited higher preference for vegetable oils over sugars, with soybean oil and tryptone determined to be optimal sources for PHA production. BM3-1 produced 33.9 g/L of exopolysaccharides (EPS), which was three-fold higher than the amount produced by H16 (10.1 g/L). EPS exhibited 59.7% of emulsification activity (EI24), higher than that of SDS and of EPS from H16 with soybean oil. To evaluate P(3HB-co-3HHx) production from soybean oil, BM3-1 was engineered with P(3HB-co-3HHx) biosynthetic genes (phaCRa, phaARe, and phaJPa). BM3-1/pPhaCJ produced 3.5 mol% of 3HHx and 37.1 g/L PHA. BM3-1/pCB81 (phaCAJ) produced 32.8 g/L PHA, including 5.9 mol% 3HHx. Physical and thermal analyses revealed that P(3HB-co-5.9 mol% 3HHx) was better than PHB. Collectively, we identified a novel strain with high vegetable oil utilization capacity for the production of EPS, with the option to engineer the strain for P(3HB-co-3HHx).
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Affiliation(s)
- Yuni Shin
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea
| | - Hyun Joong Kim
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea
| | - Tae-Rim Choi
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea
| | - Suk Jin Oh
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea
| | - Suwon Kim
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea
| | - Yeda Lee
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea
| | - Suhye Choi
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea
| | - Jinok Oh
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea
| | - So Yeon Kim
- Innovation Center, Lotte Chemical Ltd., Seoul 07594, Republic of Korea
| | - Young Sik Lee
- Innovation Center, Lotte Chemical Ltd., Seoul 07594, Republic of Korea
| | - Young Heon Choi
- Innovation Center, Lotte Chemical Ltd., Seoul 07594, Republic of Korea
| | - Shashi Kant Bhatia
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea
- Institute for Ubiquitous Information Technology and Application, Konkuk University, Seoul 05029, Republic of Korea
| | - Yung-Hun Yang
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea
- Institute for Ubiquitous Information Technology and Application, Konkuk University, Seoul 05029, Republic of Korea
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Passaretti A, Cuvillier L, Sciutto G, Joseph E. Innovative perspective for the cleaning of historical iron heritage: novel bio-organogel for the combined removal of undesired organic coatings and corrosion. HERITAGE SCIENCE 2024; 12:181. [PMID: 38845742 PMCID: PMC11150318 DOI: 10.1186/s40494-024-01288-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Accepted: 05/21/2024] [Indexed: 06/09/2024]
Abstract
An innovative green organogel was designed to simultaneously tackle inorganic compounds (i.e., iron corrosion) and organic substances (i.e., acrylic coatings) as undesired materials possibly present on the surface of altered indoor metal artworks. Poly-3-hydroxybutyrate (PHB), ethyl lactate (EL), and deferoxamine B (DFO) were employed in the formulation as thickening agent, organic solvent, and complexing agent, respectively, aiming to propose a sustainable and less harmful chemical cleaning method for metal care. The components were selected because they are bio-sourced, renewable, biodegradable, and non- or low-toxic materials. A multi-modal protocol of analysis was carried out to characterise the newly designed PHB-EL-DFO organogel. The cleaning performance of the novel formulation was assessed on mild steel mock-ups presenting both corrosion and organic coating to be removed. The conducted multi-analytical approach verified that the PHB-EL-DFO gel was able to tackle the two undesired materials simultaneously in an adjustable and easy-to-use way thanks to a modular application. Supplementary Information The online version contains supplementary material available at 10.1186/s40494-024-01288-0.
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Affiliation(s)
- Arianna Passaretti
- Haute Ecole Arc Conservation-Restauration, HES-SO University of Applied Sciences and Arts Western Switzerland, Espace de l’Europe 11, 2000 Neuchâtel, Switzerland
- Laboratory of Technologies for Heritage Materials, Institute of Chemistry, University of Neuchâtel, Av. Bellevaux 51, 2000 Neuchâtel, Switzerland
| | - Luana Cuvillier
- Haute Ecole Arc Conservation-Restauration, HES-SO University of Applied Sciences and Arts Western Switzerland, Espace de l’Europe 11, 2000 Neuchâtel, Switzerland
- Laboratory of Technologies for Heritage Materials, Institute of Chemistry, University of Neuchâtel, Av. Bellevaux 51, 2000 Neuchâtel, Switzerland
| | - Giorgia Sciutto
- Department of Chemistry, University of Bologna, Ravenna Campus, Via Guaccimanni, 48121 Ravenna, Italy
| | - Edith Joseph
- Haute Ecole Arc Conservation-Restauration, HES-SO University of Applied Sciences and Arts Western Switzerland, Espace de l’Europe 11, 2000 Neuchâtel, Switzerland
- Laboratory of Technologies for Heritage Materials, Institute of Chemistry, University of Neuchâtel, Av. Bellevaux 51, 2000 Neuchâtel, Switzerland
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Armijo-Galdames B, Sadler JC. One-Pot Biosynthesis of Acetone from Waste Poly(hydroxybutyrate). ACS SUSTAINABLE CHEMISTRY & ENGINEERING 2024; 12:7748-7756. [PMID: 38783840 PMCID: PMC11110063 DOI: 10.1021/acssuschemeng.4c00357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Revised: 04/19/2024] [Accepted: 04/22/2024] [Indexed: 05/25/2024]
Abstract
The plastic waste crisis is catalyzing change across the plastics life cycle. Central to this is increased production and application of bioplastics and biodegradable plastics. In particular, poly(hydroxybutyrate) (PHB) is a biodegradable bioplastic that can be produced from various renewable and waste feedstocks and is a promising alternative to some petrochemical-derived and non-biodegradable plastics. Despite its advantages, PHB biodegradation depends on environmental conditions, and the effects of degradation into microplastics, oligomers, and the 3-hydroxybutyrate (3-HB) monomer on soil microbiomes are unknown. We hypothesized that the ease of PHB biodegradation renders this next-generation plastic an ideal feedstock for microbial recycling into platform chemicals currently produced from fossil fuels. To demonstrate this, we report the one-pot degradation and recycling of PHB into acetone using a single strain of engineered Escherichia coli. Following strain development and initial bioprocess optimization, we report maximum titers of 123 mM acetone (7 g/L) from commercial PHB granules after 24 h fermentation at 30 °C. We further report biorecycling of an authentic sample of post-consumer PHB waste at a preparative scale. This is the first demonstration of biological recycling of PHB into a second-generation chemical, and it demonstrates next-generation plastic waste as a novel feedstock for the circular bioeconomy.
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Affiliation(s)
- Benjamín
O. Armijo-Galdames
- Institute of Quantitative
Biology, Biochemistry and Biotechnology, School of Biological Sciences, University of Edinburgh, Roger Land Building, Alexander Crum
Brown Road, King’s Buildings, Edinburgh EH9 3FF, U.K.
| | - Joanna C. Sadler
- Institute of Quantitative
Biology, Biochemistry and Biotechnology, School of Biological Sciences, University of Edinburgh, Roger Land Building, Alexander Crum
Brown Road, King’s Buildings, Edinburgh EH9 3FF, U.K.
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9
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Azizi N, Eslami R, Goudarzi S, Younesi H, Zarrin H. A Review of Current Achievements and Recent Challenges in Bacterial Medium-Chain-Length Polyhydroxyalkanoates: Production and Potential Applications. Biomacromolecules 2024; 25:2679-2700. [PMID: 38656151 DOI: 10.1021/acs.biomac.4c00090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
Using petroleum-derived plastics has contributed significantly to environmental issues, such as greenhouse gas emissions and the accumulation of plastic waste in ecosystems. Researchers have focused on developing ecofriendly polymers as alternatives to traditional plastics to address these concerns. This review provides a comprehensive overview of medium-chain-length polyhydroxyalkanoates (mcl-PHAs), biodegradable biopolymers produced by microorganisms that show promise in replacing conventional plastics. The review discusses the classification, properties, and potential substrates of less studied mcl-PHAs, highlighting their greater ductility and flexibility compared to poly(3-hydroxybutyrate), a well-known but brittle PHA. The authors summarize existing research to emphasize the potential applications of mcl-PHAs in biomedicine, packaging, biocomposites, water treatment, and energy. Future research should focus on improving production techniques, ensuring economic viability, and addressing challenges associated with industrial implementation. Investigating the biodegradability, stability, mechanical properties, durability, and cost-effectiveness of mcl-PHA-based products compared to petroleum-based counterparts is crucial. The future of mcl-PHAs looks promising, with continued research expected to optimize production techniques, enhance material properties, and expand applications. Interdisciplinary collaborations among microbiologists, engineers, chemists, and materials scientists will drive progress in this field. In conclusion, this review serves as a valuable resource to understand mcl-PHAs as sustainable alternatives to conventional plastics. However, further research is needed to optimize production methods, evaluate long-term ecological impacts, and assess the feasibility and viability in various industries.
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Affiliation(s)
- Nahid Azizi
- Department of Chemical Engineering, Toronto Metropolitan University, 350 Victoria Street, Toronto, Ontario M5B 2K3, Canada
- Research and Innovation Department, Sensofine Inc., Innovation Boost Zone (IBZ), Toronto Metropolitan University, Toronto, Ontario M5G 2C2, Canada
| | - Reza Eslami
- Department of Chemical Engineering, Toronto Metropolitan University, 350 Victoria Street, Toronto, Ontario M5B 2K3, Canada
- Research and Innovation Department, Sensofine Inc., Innovation Boost Zone (IBZ), Toronto Metropolitan University, Toronto, Ontario M5G 2C2, Canada
| | - Shaghayegh Goudarzi
- Department of Chemical Engineering, Toronto Metropolitan University, 350 Victoria Street, Toronto, Ontario M5B 2K3, Canada
| | - Habibollah Younesi
- Department of Environmental Science, Faculty of Natural Resources, Tarbiat Modares University (TMU), Nour 64414-356, Iran
| | - Hadis Zarrin
- Department of Chemical Engineering, Toronto Metropolitan University, 350 Victoria Street, Toronto, Ontario M5B 2K3, Canada
- Research and Innovation Department, Sensofine Inc., Innovation Boost Zone (IBZ), Toronto Metropolitan University, Toronto, Ontario M5G 2C2, Canada
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10
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Al-Hammadi M, Güngörmüşler M. New insights into Chlorella vulgaris applications. Biotechnol Bioeng 2024; 121:1486-1502. [PMID: 38343183 DOI: 10.1002/bit.28666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 12/18/2023] [Accepted: 01/18/2024] [Indexed: 04/14/2024]
Abstract
Environmental pollution is a big challenge that has been faced by humans in contemporary life. In this context, fossil fuel, cement production, and plastic waste pose a direct threat to the environment and biodiversity. One of the prominent solutions is the use of renewable sources, and different organisms to valorize wastes into green energy and bioplastics such as polylactic acid. Chlorella vulgaris, a microalgae, is a promising candidate to resolve these issues due to its ease of cultivation, fast growth, carbon dioxide uptake, and oxygen production during its growth on wastewater along with biofuels, and other productions. Thus, in this article, we focused on the potential of Chlorella vulgaris to be used in wastewater treatment, biohydrogen, biocement, biopolymer, food additives, and preservation, biodiesel which is seen to be the most promising for industrial scale, and related biorefineries with the most recent applications with a brief review of Chlorella and polylactic acid market size to realize the technical/nontechnical reasons behind the cost and obstacles that hinder the industrial production for the mentioned applications. We believe that our findings are important for those who are interested in scientific/financial research about microalgae.
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Affiliation(s)
- Mohammed Al-Hammadi
- Division of Bioengineering, Graduate School, Izmir University of Economics, Izmir, Türkiye
| | - Mine Güngörmüşler
- Department of Genetics and Bioengineering, Faculty of Engineering, Izmir University of Economics, Izmir, Türkiye
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11
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Wang J, Huang J, Liu S. The production, recovery, and valorization of polyhydroxybutyrate (PHB) based on circular bioeconomy. Biotechnol Adv 2024; 72:108340. [PMID: 38537879 DOI: 10.1016/j.biotechadv.2024.108340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Revised: 02/07/2024] [Accepted: 03/01/2024] [Indexed: 04/17/2024]
Abstract
As an energy-storage substance of microorganisms, polyhydroxybutyrate (PHB) is a promising alternative to petrochemical polymers. Under appropriate fermentation conditions, PHB-producing strains with metabolic diversity can efficiently synthesize PHB using various carbon sources. Carbon-rich wastes may serve as alternatives to pure sugar substrates to reduce the cost of PHB production. Genetic engineering strategies can further improve the efficiency of substrate assimilation and PHB synthesis. In the downstream link, PHB recycling strategies based on green chemistry concepts can replace PHB extraction using chlorinated solvents to enhance the economics of PHB production and reduce the potential risks of environmental pollution and health damage. To avoid carbon loss caused by biodegradation in the traditional sense, various strategies have been developed to degrade PHB waste into monomers. These monomers can serve as platform chemicals to synthesize other functional compounds or as substrates for PHB reproduction. The sustainable potential and cycling value of PHB are thus reflected. This review summarized the recent progress of strains, substrates, and fermentation approaches for microbial PHB production. Analyses of available strategies for sustainable PHB recycling were also included. Furthermore, it discussed feasible pathways for PHB waste valorization. These contents may provide insights for constructing PHB-based comprehensive biorefinery systems.
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Affiliation(s)
- Jianfei Wang
- Department of Chemical Engineering, SUNY College of Environmental Science and Forestry, Syracuse, NY 13210, United States
| | - Jiaqi Huang
- Department of Chemical Engineering, SUNY College of Environmental Science and Forestry, Syracuse, NY 13210, United States
| | - Shijie Liu
- Department of Chemical Engineering, SUNY College of Environmental Science and Forestry, Syracuse, NY 13210, United States.
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12
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Oh SJ, Kim S, Lee Y, Shin Y, Choi S, Oh J, Bhatia SK, Joo JC, Yang YH. Controlled production of a polyhydroxyalkanoate (PHA) tetramer containing different mole fraction of 3-hydroxybutyrate (3HB), 3-hydroxyvalerate (3 HV), 4 HV and 5 HV units by engineered Cupriavidus necator. Int J Biol Macromol 2024; 266:131332. [PMID: 38574905 DOI: 10.1016/j.ijbiomac.2024.131332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2024] [Revised: 02/28/2024] [Accepted: 03/31/2024] [Indexed: 04/06/2024]
Abstract
Polyhydroxyalkanoates (PHAs) are promising alternatives to existing petrochemical-based plastics because of their bio-degradable properties. However, the limited structural diversity of PHAs has hindered their application. In this study, high mole-fractions of Poly (39 mol% 3HB-co-17 mol% 3 HV-co-44 mol% 4 HV) and Poly (25 mol% 3HB-co-75 mol% 5 HV) were produced from 4- hydroxyvaleric acid and 5-hydroxyvaleric acid, using Cupriavidus necator PHB-4 harboring the gene phaCBP-M-CPF4 with modified sequences. In addition, the complex toxicity of precursor mixtures was tested, and it was confirmed that the engineered C. necator was capable of synthesizing Poly (32 mol% 3HB-co-11 mol% 3 HV-co-25 mol% 4 HV-co-32 mol% 5 HV) at low mixture concentrations. Correlation analyses of the precursor ratio and the monomeric mole fractions indicated that each mole fractions could be precisely controlled using the precursor proportion. Physical property analysis confirmed that Poly (3HB-co-3 HV-co-4 HV) is a rubber-like amorphous polymer and Poly (3HB-co-5 HV) has a high tensile strength and elongation at break. Poly (3HB-co-3 HV-co-4 HV-co-5 HV) had a much lower glass transition temperature than the co-, terpolymers containing 3 HV, 4 HV and 5 HV. This study expands the range of possible physical properties of PHAs and contributes to the realization of custom PHA production by suggesting a method for producing PHAs with various physical properties through mole-fraction control of 3 HV, 4 HV and 5 HV.
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Affiliation(s)
- Suk-Jin Oh
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea
| | - Suwon Kim
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea
| | - Yeda Lee
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea
| | - Yuni Shin
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea
| | - Suhye Choi
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea
| | - Jinok Oh
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea
| | - Shashi Kant Bhatia
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea; Institute for Ubiquitous Information Technology and Application, Konkuk University, Seoul, Republic of Korea
| | - Jeong Chan Joo
- Department of Chemical Engineering, Kyung Hee University, Kyunggi-do, Republic of Korea
| | - Yung-Hun Yang
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea; Institute for Ubiquitous Information Technology and Application, Konkuk University, Seoul, Republic of Korea.
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13
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Pandit A, Kumar KD, Kumar R. In vitro degradation and antibacterial activity of bacterial cellulose deposited flax fabric reinforced with polylactic acid and polyhydroxybutyrate. Int J Biol Macromol 2024; 266:131199. [PMID: 38574917 DOI: 10.1016/j.ijbiomac.2024.131199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2023] [Revised: 03/24/2024] [Accepted: 03/26/2024] [Indexed: 04/06/2024]
Abstract
The objective of this study was to prepare biocomposites through the solution casting method followed by compression moulding in which bacterial cellulose (BC) deposited flax fabric (FF) produced through fermentation is coated with minimal amount of polylactic acid (PLA) and polyhydroxybutyrate (PHB). Biocomposites incorporated with 60 % of PLA or PHB (% w/w) show enhanced tensile strength. Cross-sectional morphology showed good superficial interaction of these biopolymers with fibres of FF thereby filling up the gaps present between the fibres. The tensile strength of biocomposites at 60 % PLA and 60 % PHB improved from 37.97 MPa (i.e., BC deposited FF produced in presence of honey) to 67.17 MPa and 56.26 MPa, respectively. Further, 0.25 % of nalidixic acid (NA) (% w/w) and 6 % of oleic acid (OA) (% w/w) incorporation into the biocomposites imparted prolonged antibacterial activity against Escherichia coli, Staphylococcus aureus and Pseudomonas aeruginosa. The in vitro cytotoxicity of biocomposites was determined using L929 mouse fibroblast cells. The 3-(4,5-cime- thylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide cytotoxicity tests showed that the PHB derived biocomposites along with antibacterial compounds in it were non-toxic. In vitro degradation of biocomposites was measured for up to 8 weeks in the mimicked physiological environment that showed a gradual rate of degradation over the period.
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Affiliation(s)
- Abhay Pandit
- Department of Biotechnology, Central University of South Bihar, Gaya 824236, India
| | - K Dinesh Kumar
- Department of Materials Science & Engineering, Indian Institute of Technology, Patna 801106, India
| | - Rakesh Kumar
- Department of Biotechnology, Central University of South Bihar, Gaya 824236, India.
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14
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Deantas-Jahn C, Mendoza SN, Licona-Cassani C, Orellana C, Saa PA. Metabolic modeling of Halomonas campaniensis improves polyhydroxybutyrate production under nitrogen limitation. Appl Microbiol Biotechnol 2024; 108:310. [PMID: 38662130 PMCID: PMC11045607 DOI: 10.1007/s00253-024-13111-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 02/25/2024] [Accepted: 03/18/2024] [Indexed: 04/26/2024]
Abstract
Poly-hydroxybutyrate (PHB) is an environmentally friendly alternative for conventional fossil fuel-based plastics that is produced by various microorganisms. Large-scale PHB production is challenging due to the comparatively higher biomanufacturing costs. A PHB overproducer is the haloalkaliphilic bacterium Halomonas campaniensis, which has low nutritional requirements and can grow in cultures with high salt concentrations, rendering it resistant to contamination. Despite its virtues, the metabolic capabilities of H. campaniensis as well as the limitations hindering higher PHB production remain poorly studied. To address this limitation, we present HaloGEM, the first high-quality genome-scale metabolic network reconstruction, which encompasses 888 genes, 1528 reactions (1257 gene-associated), and 1274 metabolites. HaloGEM not only displays excellent agreement with previous growth data and experiments from this study, but it also revealed nitrogen as a limiting nutrient when growing aerobically under high salt concentrations using glucose as carbon source. Among different nitrogen source mixtures for optimal growth, HaloGEM predicted glutamate and arginine as a promising mixture producing increases of 54.2% and 153.4% in the biomass yield and PHB titer, respectively. Furthermore, the model was used to predict genetic interventions for increasing PHB yield, which were consistent with the rationale of previously reported strategies. Overall, the presented reconstruction advances our understanding of the metabolic capabilities of H. campaniensis for rationally engineering this next-generation industrial biotechnology platform. KEY POINTS: A comprehensive genome-scale metabolic reconstruction of H. campaniensis was developed. Experiments and simulations predict N limitation in minimal media under aerobiosis. In silico media design increased experimental biomass yield and PHB titer.
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Affiliation(s)
- Carolina Deantas-Jahn
- Departamento de Ingeniería Química y Bioprocesos, Escuela de Ingeniería, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Sebastián N Mendoza
- Departamento de Ingeniería Química y Bioprocesos, Escuela de Ingeniería, Pontificia Universidad Católica de Chile, Santiago, Chile
- Systems Biology Lab, Vrije Universiteit Amsterdam, Amsterdam, Netherlands
| | - Cuauhtemoc Licona-Cassani
- Núcleo de Innovación de Sistemas Biológicos (NISB), FEMSA Biotechnology Center, Tecnológico de Monterrey, Monterrey, Mexico
- Escuela de Ingeniería y Ciencias, Tecnológico de Monterrey, Monterrey, Mexico
| | - Camila Orellana
- Departamento de Ingeniería Química y Bioprocesos, Escuela de Ingeniería, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Pedro A Saa
- Departamento de Ingeniería Química y Bioprocesos, Escuela de Ingeniería, Pontificia Universidad Católica de Chile, Santiago, Chile.
- Instituto de Ingeniería Matemática y Computacional, Pontificia Universidad Católica de Chile, Santiago, Chile.
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15
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Reiter MA, Bradley T, Büchel LA, Keller P, Hegedis E, Gassler T, Vorholt JA. A synthetic methylotrophic Escherichia coli as a chassis for bioproduction from methanol. Nat Catal 2024; 7:560-573. [PMID: 38828428 PMCID: PMC11136667 DOI: 10.1038/s41929-024-01137-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Accepted: 02/29/2024] [Indexed: 06/05/2024]
Abstract
Methanol synthesized from captured greenhouse gases is an emerging renewable feedstock with great potential for bioproduction. Recent research has raised the prospect of methanol bioconversion to value-added products using synthetic methylotrophic Escherichia coli, as its metabolism can be rewired to enable growth solely on the reduced one-carbon compound. Here we describe the generation of an E. coli strain that grows on methanol at a doubling time of 4.3 h-comparable to many natural methylotrophs. To establish bioproduction from methanol using this synthetic chassis, we demonstrate biosynthesis from four metabolic nodes from which numerous bioproducts can be derived: lactic acid from pyruvate, polyhydroxybutyrate from acetyl coenzyme A, itaconic acid from the tricarboxylic acid cycle and p-aminobenzoic acid from the chorismate pathway. In a step towards carbon-negative chemicals and valorizing greenhouse gases, our work brings synthetic methylotrophy in E. coli within reach of industrial applications.
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Affiliation(s)
- Michael A. Reiter
- Institute of Microbiology, Department of Biology, ETH Zurich, Zurich, Switzerland
| | - Timothy Bradley
- Institute of Microbiology, Department of Biology, ETH Zurich, Zurich, Switzerland
| | - Lars A. Büchel
- Institute of Microbiology, Department of Biology, ETH Zurich, Zurich, Switzerland
| | - Philipp Keller
- Institute of Microbiology, Department of Biology, ETH Zurich, Zurich, Switzerland
| | - Emese Hegedis
- Institute of Microbiology, Department of Biology, ETH Zurich, Zurich, Switzerland
| | - Thomas Gassler
- Institute of Microbiology, Department of Biology, ETH Zurich, Zurich, Switzerland
| | - Julia A. Vorholt
- Institute of Microbiology, Department of Biology, ETH Zurich, Zurich, Switzerland
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16
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Ali M, Mohd Noor SNF, Mohamad H, Ullah F, Javed F, Abdul Hamid ZA. Advances in guided bone regeneration membranes: a comprehensive review of materials and techniques. Biomed Phys Eng Express 2024; 10:032003. [PMID: 38224615 DOI: 10.1088/2057-1976/ad1e75] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Accepted: 01/15/2024] [Indexed: 01/17/2024]
Abstract
Guided tissue/bone regeneration (GTR/GBR) is a widely used technique in dentistry to facilitate the regeneration of damaged bone and tissue, which involves guiding materials that eventually degrade, allowing newly created tissue to take its place. This comprehensive review the evolution of biomaterials for guided bone regeneration that showcases a progressive shift from non-resorbable to highly biocompatible and bioactive materials, allowing for more effective and predictable bone regeneration. The evolution of biomaterials for guided bone regeneration GTR/GBR has marked a significant progression in regenerative dentistry and maxillofacial surgery. Biomaterials used in GBR have evolved over time to enhance biocompatibility, bioactivity, and efficacy in promoting bone growth and integration. This review also probes into several promising fabrication techniques like electrospinning and latest 3D printing fabrication techniques, which have shown potential in enhancing tissue and bone regeneration processes. Further, the challenges and future direction of GTR/GBR are explored and discussed.
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Affiliation(s)
- Mohammed Ali
- School of Materials and Mineral Resources Engineering, Universiti Sains Malaysia, Engineering Campus, 14300, Nibong Tebal, Pulau Pinang, Malaysia
| | - Siti Noor Fazliah Mohd Noor
- Dental Stimulation and Virtual Learning, Research Excellence Consortium, Advanced Medical and Dental Institute (AMDI), Universiti Sains Malaysia, Bertam 13200 Kepala Batas, Pulau Pinang, Malaysia
| | - Hasmaliza Mohamad
- School of Materials and Mineral Resources Engineering, Universiti Sains Malaysia, Engineering Campus, 14300, Nibong Tebal, Pulau Pinang, Malaysia
| | - Faheem Ullah
- School of Materials and Mineral Resources Engineering, Universiti Sains Malaysia, Engineering Campus, 14300, Nibong Tebal, Pulau Pinang, Malaysia
- Department of Biological Sciences, Biopolymer Research Centre (BRC), National University of Medical Sciences, 46000, Rawalpindi, Pakistan
| | - Fatima Javed
- Department of Chemistry, Shaheed Benazir Butto Women University Peshawar, Charsadda Road Laramma, 25000, Peshawar, Pakistan
| | - Zuratul Ain Abdul Hamid
- School of Materials and Mineral Resources Engineering, Universiti Sains Malaysia, Engineering Campus, 14300, Nibong Tebal, Pulau Pinang, Malaysia
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17
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Basak S, Subramanian B, Thirumurugan R, Saleena LM. PHB Production by Bacillus megaterium LSRB 0103 Using Cornstarch and Urea. Curr Microbiol 2024; 81:139. [PMID: 38613599 DOI: 10.1007/s00284-024-03667-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Accepted: 03/16/2024] [Indexed: 04/15/2024]
Abstract
Polyhydroxybutyrates (PHBs) are biopolymers that are good green alternative for synthetic carbon-based polymers, and are also one of the most researched members of the Polyhydroxyalkanoates (PHA) family. In this study, a gram-positive bacterial strain Bacillus megaterium LSRB 0103 was isolated from Pallikaranai Marshland, Chennai, India. Primary screening using Sudan Black dye revealed the presence of intracellular PHB granules. Minimal Davis Media (MDM) which was used or PHB production gave a yield of 0.7107 g/L. Subsequently, using response surface methodology (RSM), a central composite design (CCD) model was designed for media optimization having cornstarch, urea, and pH as independent variables. The findings of the CCD model were fitted into a second-order polynomial equation. The RSM model predicted the maximum PHB yield of 0.93 g/L, at these independent variable levels, cornstarch, 5 g/L; urea, 2.1 g/L; and pH 7.0; while the experimental PHB yield was 0.94 g/L, with a percentage error of 1.1%. This study is the first-time report of production of PHB by Bacillus megaterium using cornstarch and urea as substrate.
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Affiliation(s)
- Souvik Basak
- Department of Biotechnology, School of Bioengineering, College of Engineering and Technology, SRM Institute of Science and Technology, SRM Nagar, Kattankulathur, Kanchipuram, Chennai, Tamil Nadu, 603203, India
| | - Bhargavi Subramanian
- Department of Biotechnology, School of Bioengineering, College of Engineering and Technology, SRM Institute of Science and Technology, SRM Nagar, Kattankulathur, Kanchipuram, Chennai, Tamil Nadu, 603203, India
| | - Rithanya Thirumurugan
- Department of Biotechnology, School of Bioengineering, College of Engineering and Technology, SRM Institute of Science and Technology, SRM Nagar, Kattankulathur, Kanchipuram, Chennai, Tamil Nadu, 603203, India
| | - Lilly M Saleena
- Department of Biotechnology, School of Bioengineering, College of Engineering and Technology, SRM Institute of Science and Technology, SRM Nagar, Kattankulathur, Kanchipuram, Chennai, Tamil Nadu, 603203, India.
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18
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Mai J, Kockler K, Parisi E, Chan CM, Pratt S, Laycock B. Synthesis and physical properties of polyhydroxyalkanoate (PHA)-based block copolymers: A review. Int J Biol Macromol 2024; 263:130204. [PMID: 38365154 DOI: 10.1016/j.ijbiomac.2024.130204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2023] [Revised: 01/15/2024] [Accepted: 02/13/2024] [Indexed: 02/18/2024]
Abstract
Polyhydroxyalkanoates (PHAs) are a group of natural polyesters that are synthesised by microorganisms. In general, their thermoplasticity and (in some forms) their elasticity makes them attractive alternatives to petrochemical-derived polymers. However, the high crystallinity of some PHAs - such as poly(3-hydroxybutyrate) (P3HB) - results in brittleness and a narrow processing window for applications such as packaging. The production of copolymeric PHA materials is one approach to improving the mechanical and thermal properties of PHAs. Another solution is the manufacture of PHA-based block copolymers. The incorporation of different polymer and copolymer blocks coupled to PHA, and the resulting tailorable microstructure of these block copolymers, can result in a step-change improvement in PHA-based material properties. A range of production strategies for PHA-based block copolymers has been reported in the literature, including biological production and chemical synthesis. Biological production is typically less controllable, with products of a broad molecular weight and compositional distribution, unless finely controlled using genetically modified organisms. By contrast, chemical synthesis delivers relatively controllable block structures and narrowly defined compositions. This paper reviews current knowledge in the areas of the production and properties of PHA-based block copolymers, and highlights knowledge gaps and future potential areas of research.
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Affiliation(s)
- Jingjing Mai
- Fujian Normal University, College of Environmental and Resource Sciences, College of Carbon Neutral Modern Industry, Fuzhou, Fujian 350000, China
| | - Katrin Kockler
- The University of Queensland, School of Chemical Engineering, St Lucia, Brisbane, Queensland 4072, Australia
| | - Emily Parisi
- Parisi Technologies, LLC Portland, Oregon, United States
| | - Clement Matthew Chan
- The University of Queensland, School of Chemical Engineering, St Lucia, Brisbane, Queensland 4072, Australia
| | - Steven Pratt
- The University of Queensland, School of Chemical Engineering, St Lucia, Brisbane, Queensland 4072, Australia
| | - Bronwyn Laycock
- The University of Queensland, School of Chemical Engineering, St Lucia, Brisbane, Queensland 4072, Australia.
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19
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Santos A, Oliveira M, Almeida M, Lopes I, Venâncio C. Short- and long-term toxicity of nano-sized polyhydroxybutyrate to the freshwater cnidarian Hydra viridissima. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 917:170282. [PMID: 38272078 DOI: 10.1016/j.scitotenv.2024.170282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Revised: 01/16/2024] [Accepted: 01/17/2024] [Indexed: 01/27/2024]
Abstract
The accumulation of increasingly smaller plastic particles in aquatic ecosystems is a prominent environmental issue and is causing a significant impact on aquatic biota. In response to this challenge, biodegradable plastics have emerged as a potential ecological alternative. Nevertheless, despite recent progress in polymer toxicology, there is still limited understanding of the ecological implications of biodegradable plastics in freshwater ecosystems. This study evaluated the toxicity of polyhydroxybutyrate nano-sized particles (PHB-NPLs) on the freshwater cnidarian Hydra viridissima assessing individual and population-level effects. Data revealed low toxicity of PHB-NPLs to H. viridissima in the short-term, as evidenced by the absence of significant malformations and mortality after the 96-h assays. In addition, hydras exhibited rapid and complete regeneration after 96 h of exposure to PHB-NPLs. Feeding assays revealed no significant alterations in prey consumption behavior in the 96-h mortality and malformations assay and the regeneration assay. However, significantly increased feeding rates were observed after long-term exposure, across all tested concentrations of PHB-NPLs. This increase may be attributed to the organisms' heightened energetic demand, stemming from prolonged activation of detoxification mechanisms. These changes may have a cascading effect within the food web, influencing community dynamics and ecosystem stability. Furthermore, a dose-dependent response on the hydras' populational growth was found, with an estimated 20 % effect concentration (EC20,8d) on this endpoint of 10.9 mg PHB-NPLs/L that suggests potential long-term impacts on the population's reproductive output and potential depression and local extinction upon long-term exposure to PHB-NPLs on H. viridissima. The obtained data emphasizes the importance of evaluating sublethal effects and supports the adoption of long-term assays when assessing the toxicity of novel polymers, providing crucial data for informed regulation to safeguard freshwater ecosystems. Future research should aim to unravel the underlying mechanisms behind these sublethal effects, as well as the impact of the generated degradation products.
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Affiliation(s)
- Ana Santos
- Department of Biology, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Miguel Oliveira
- CESAM - Centre for Environmental and Marine Studies, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - Mónica Almeida
- CESAM - Centre for Environmental and Marine Studies, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Isabel Lopes
- CESAM - Centre for Environmental and Marine Studies, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Cátia Venâncio
- CESAM - Centre for Environmental and Marine Studies, University of Aveiro, 3810-193 Aveiro, Portugal
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20
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Amabile C, Abate T, Marcos E, Chianese S, Musmarra D, Muñoz R. Exploring New Strategies for Optimizing the Production of Poly(3-hydroxybutyrate- co-3-hydroxyvalerate) from Methane and VFAs in Synthetic Cocultures and Mixed Methanotrophic Consortia. ACS SUSTAINABLE CHEMISTRY & ENGINEERING 2024; 12:4690-4699. [PMID: 38516398 PMCID: PMC10954047 DOI: 10.1021/acssuschemeng.3c08570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Revised: 02/19/2024] [Accepted: 02/21/2024] [Indexed: 03/23/2024]
Abstract
In this work, the potential of a synthetic coculture and a mixed methanotrophic consortium to synthesize poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) from renewable and waste-based feedstocks was assessed batchwise. Methylocystis parvuscocultivated with Rhodococcus opacus and a Methylocystis-enriched culture previously grown on methane were subjected to nutrient starvation in a medium enriched with valeric acid (30% w w-1 of Ctot) or with a VFAs mixture containing acetic, propionic, butyric, and valeric acids (15% w w-1 of Ctot) under a CH4:O2 or air atmosphere. For all test series, pH was adjusted to 7 after adding the cosubstrates, and a negligible substrate consumption or polymer production was considered the end point of the trial. Results showed that valeric acid promoted PHBV accumulation in both cultures regardless of the atmosphere. Interestingly, the mixture of VFAs supported PHBV accumulation only in the presence of methane. The highest PHBV contents for the coculture and the mixed consortium, equal to 73.7 ± 2.5% w w-1 and 49.6 ± 13% w w-1, respectively, were obtained with methane and the VFAs mixture. This study demonstrates the suitability of cocultures and biobased cosubstrates for the sustainable production of the biodegradable polymer PHBV.
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Affiliation(s)
- Claudia Amabile
- Department
of Engineering, University of Campania “Luigi
Vanvitelli”, Via Roma 29, Aversa 81031, Italy
- Institute
of Sustainable Processes, University of
Valladolid, Dr. Mergelina,
s/n, Valladolid 47011, Spain
| | - Teresa Abate
- Department
of Engineering, University of Campania “Luigi
Vanvitelli”, Via Roma 29, Aversa 81031, Italy
- Institute
of Sustainable Processes, University of
Valladolid, Dr. Mergelina,
s/n, Valladolid 47011, Spain
| | - Enrique Marcos
- Institute
of Sustainable Processes, University of
Valladolid, Dr. Mergelina,
s/n, Valladolid 47011, Spain
| | - Simeone Chianese
- Department
of Engineering, University of Campania “Luigi
Vanvitelli”, Via Roma 29, Aversa 81031, Italy
| | - Dino Musmarra
- Department
of Engineering, University of Campania “Luigi
Vanvitelli”, Via Roma 29, Aversa 81031, Italy
| | - Raul Muñoz
- Institute
of Sustainable Processes, University of
Valladolid, Dr. Mergelina,
s/n, Valladolid 47011, Spain
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21
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Aguilar-Carrillo Y, Soto-Urzúa L, Martínez-Martínez MDLÁ, Becerril-Ramírez M, Martínez-Morales LJ. Computational Analysis of the Tripartite Interaction of Phasins (PhaP4 and 5)-Sigma Factor (σ 24)-DNA of Azospirillum brasilense Sp7. Polymers (Basel) 2024; 16:611. [PMID: 38475295 DOI: 10.3390/polym16050611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Revised: 02/04/2024] [Accepted: 02/07/2024] [Indexed: 03/14/2024] Open
Abstract
Azospirillum brasilense Sp7 produces PHB, which is covered by granule-associated proteins (GAPs). Phasins are the main GAPs. Previous studies have shown phasins can regulate PHB synthesis. When A. brasilense grows under stress conditions, it uses sigma factors to transcribe genes for survival. One of these factors is the σ24 factor. This study determined the possible interaction between phasins and the σ24 factor or phasin-σ24 factor complex and DNA. Three-dimensional structures of phasins and σ24 factor structures were predicted using the I-TASSER and SWISS-Model servers, respectively. Subsequently, a molecular docking between phasins and the σ24 factor was performed using the ClusPro 2.0 server, followed by molecular docking between protein complexes and DNA using the HDOCK server. Evaluation of the types of ligand-receptor interactions was performed using the BIOVIA Discovery Visualizer for three-dimensional diagrams, as well as the LigPlot server to obtain bi-dimensional diagrams. The results showed the phasins (Pha4Abs7 or Pha5Abs7)-σ24 factor complex was bound near the -35 box of the promoter region of the phaC gene. However, in the individual interaction of PhaP5Abs7 and the σ24 factor, with DNA, both proteins were bound to the -35 box. This did not occur with PhaP4Abs7, which was bound to the -10 box. This change could affect the transcription level of the phaC gene and possibly affect PHB synthesis.
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Affiliation(s)
- Yovani Aguilar-Carrillo
- Centro de Investigaciones en Ciencias Microbiológicas, Instituto de Ciencias, Benemérita Universidad Autónoma de Puebla, Av. San Claudio y Av. 24 Sur, Col. San Manuel Ciudad Universitaria, Puebla 72570, Mexico
| | - Lucía Soto-Urzúa
- Centro de Investigaciones en Ciencias Microbiológicas, Instituto de Ciencias, Benemérita Universidad Autónoma de Puebla, Av. San Claudio y Av. 24 Sur, Col. San Manuel Ciudad Universitaria, Puebla 72570, Mexico
| | - María De Los Ángeles Martínez-Martínez
- Centro de Investigaciones en Ciencias Microbiológicas, Instituto de Ciencias, Benemérita Universidad Autónoma de Puebla, Av. San Claudio y Av. 24 Sur, Col. San Manuel Ciudad Universitaria, Puebla 72570, Mexico
| | - Mirian Becerril-Ramírez
- Centro de Investigaciones en Ciencias Microbiológicas, Instituto de Ciencias, Benemérita Universidad Autónoma de Puebla, Av. San Claudio y Av. 24 Sur, Col. San Manuel Ciudad Universitaria, Puebla 72570, Mexico
| | - Luis Javier Martínez-Morales
- Centro de Investigaciones en Ciencias Microbiológicas, Instituto de Ciencias, Benemérita Universidad Autónoma de Puebla, Av. San Claudio y Av. 24 Sur, Col. San Manuel Ciudad Universitaria, Puebla 72570, Mexico
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22
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Corti Monzón G, Bertola G, Herrera Seitz MK, Murialdo SE. Exploring polyhydroxyalkanoates biosynthesis using hydrocarbons as carbon source: a comprehensive review. Biodegradation 2024:10.1007/s10532-023-10068-9. [PMID: 38310580 DOI: 10.1007/s10532-023-10068-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Accepted: 12/13/2023] [Indexed: 02/06/2024]
Abstract
Environmental pollution caused by petrochemical hydrocarbons (HC) and plastic waste is a pressing global challenge. However, there is a promising solution in the form of bacteria that possess the ability to degrade HC, making them valuable tools for remediating contaminated environments and effluents. Moreover, some of these bacteria offer far-reaching potential beyond bioremediation, as they can also be utilized to produce polyhydroxyalkanoates (PHAs), a common type of bioplastics. The accumulation of PHAs in bacterial cells is facilitated in environments with high C/N or C/P ratio, which are often found in HC-contaminated environments and effluents. Consequently, some HC-degrading bacteria can be employed to simultaneously produce PHAs and conduct biodegradation processes. Although bacterial bioplastic production has been thoroughly studied, production costs are still too high compared to petroleum-derived plastics. This article aims to provide a comprehensive review of recent scientific advancements concerning the capacity of HC-degrading bacteria to produce PHAs. It will delve into the microbial strains involved and the types of bioplastics generated, as well as the primary pathways for HC biodegradation and PHAs production. In essence, we propose the potential utilization of HC-degrading bacteria as a versatile tool to tackle two major environmental challenges: HC pollution and the accumulation of plastic waste. Through a comprehensive analysis of strengths and weaknesses in this aspect, this review aims to pave the way for future research in this area, with the goal of facilitating and promoting investigation in a field where obtaining PHAs from HC remains a costly and challenging process.
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Affiliation(s)
- G Corti Monzón
- Instituto de Ciencia y Tecnología de Alimentos y Ambiente, INCITAA, CONICET, Universidad Nacional de Mar del Plata, Buenos Aires, Argentina.
| | - G Bertola
- Instituto de Ciencia y Tecnología de Alimentos y Ambiente, INCITAA, CONICET, Universidad Nacional de Mar del Plata, Buenos Aires, Argentina
| | - M K Herrera Seitz
- Instituto de Investigaciones Biológicas, IIB, CONICET, Universidad Nacional de Mar del Plata, Buenos Aires, Argentina
| | - S E Murialdo
- Instituto de Ciencia y Tecnología de Alimentos y Ambiente, INCITAA, CIC, Universidad Nacional de Mar del Plata, Buenos Aires, Argentina
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23
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Hernández-Herreros N, Rivero-Buceta V, Pardo I, Prieto MA. Production of poly(3-hydroxybutyrate)/poly(lactic acid) from industrial wastewater by wild-type Cupriavidus necator H16. WATER RESEARCH 2024; 249:120892. [PMID: 38007895 DOI: 10.1016/j.watres.2023.120892] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 11/13/2023] [Accepted: 11/16/2023] [Indexed: 11/28/2023]
Abstract
The massive production of urban and industrial wastes has created a clear need for alternative waste management processes. One of the more promising strategies is to use waste as raw material for the production of biopolymers such as polyhydroxyalkanoates (PHAs). In this work, a lactate-enriched stream obtained by anaerobic digestion (AD) of wastewater (WW) from a candy production plant was used as a feedstock for PHA production in wild-type Cupriavidus necator H16. Unexpectedly, we observed the accumulation of poly(3-hydroxybutyrate)/poly(lactic acid) (P(3HB)/PLA), suggesting that the non-engineered strain already possesses the metabolic potential to produce these polymers of interest. The systematic study of factors, such as incubation time, nitrogen and lactate concentration, influencing the synthesis of P(3HB)/PLA allowed the production of a panel of polymers in a resting cell system with tailored lactic acid (LA) content according to the GC-MS of the biomass. Further biomass extraction suggested the presence of methanol soluble low molecular weight molecules containing LA, while 1 % LA could be detected in the purified polymer fraction. These results suggested that the cells are producing a blend of polymers. A proteomic analysis of C. necator resting cells under P(3HB)/PLA production conditions provides new insights into the latent pathways involved in this process. This study is a proof of concept demonstrating that LA can polymerize in a non-modified organism and paves the way for new metabolic engineering approaches for lactic acid polymer production in the model bacterium C. necator H16.
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Affiliation(s)
- Natalia Hernández-Herreros
- Microbial & Plant Biotechnology Department. Polymer Biotechnology Group. Biological Research Centre Margarita Salas, Spanish National Research Council (CIB-CSIC), Madrid, Spain; Interdisciplinary Platform for Sustainable Plastics towards a Circular Economy-Spanish National Research Council (SusPlast-CSIC), Madrid, Spain
| | - Virginia Rivero-Buceta
- Microbial & Plant Biotechnology Department. Polymer Biotechnology Group. Biological Research Centre Margarita Salas, Spanish National Research Council (CIB-CSIC), Madrid, Spain; Interdisciplinary Platform for Sustainable Plastics towards a Circular Economy-Spanish National Research Council (SusPlast-CSIC), Madrid, Spain
| | - Isabel Pardo
- Microbial & Plant Biotechnology Department. Polymer Biotechnology Group. Biological Research Centre Margarita Salas, Spanish National Research Council (CIB-CSIC), Madrid, Spain; Interdisciplinary Platform for Sustainable Plastics towards a Circular Economy-Spanish National Research Council (SusPlast-CSIC), Madrid, Spain
| | - M Auxiliadora Prieto
- Microbial & Plant Biotechnology Department. Polymer Biotechnology Group. Biological Research Centre Margarita Salas, Spanish National Research Council (CIB-CSIC), Madrid, Spain; Interdisciplinary Platform for Sustainable Plastics towards a Circular Economy-Spanish National Research Council (SusPlast-CSIC), Madrid, Spain.
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24
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de Mello AFM, Vandenberghe LPDS, Machado CMB, Brehmer MS, de Oliveira PZ, Binod P, Sindhu R, Soccol CR. Polyhydroxyalkanoates production in biorefineries: A review on current status, challenges and opportunities. BIORESOURCE TECHNOLOGY 2024; 393:130078. [PMID: 37993072 DOI: 10.1016/j.biortech.2023.130078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Revised: 11/17/2023] [Accepted: 11/18/2023] [Indexed: 11/24/2023]
Abstract
The need for a sustainable and circular bioeconomy model is imperative due to petroleum non-renewability, scarcity and environmental impacts. Biorefineries systems explore biomass to its maximum, being an important pillar for the development of circular bioeconomy. Polyhydroxyalkanoates (PHAs) can take advantage of biorefineries, as they can be produced using renewable feedstocks, and are potential substitutes for petrochemical plastics. The present work aims to evaluate the current status of the industrial development of PHAs production in biorefineries and PHAs contributions to the bioeconomy, along with future development points. Advancements are noticed when PHA production is coupled in wastewater treatment systems, when residues are used as substrate, and also when analytical methodologies are applied to evaluate the production process, such as the Life Cycle and Techno-Economic Analysis. For the commercial success of PHAs, it is established the need for dedicated investment and policies, in addition to proper collaboration of different society actors.
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Affiliation(s)
- Ariane Fátima Murawski de Mello
- Federal University of Paraná, Department of Bioprocess Engineering and Biotechnology, Centro Politécnico, 81531-980, Curitiba, Paraná, Brazil
| | - Luciana Porto de Souza Vandenberghe
- Federal University of Paraná, Department of Bioprocess Engineering and Biotechnology, Centro Politécnico, 81531-980, Curitiba, Paraná, Brazil.
| | - Clara Matte Borges Machado
- Federal University of Paraná, Department of Bioprocess Engineering and Biotechnology, Centro Politécnico, 81531-980, Curitiba, Paraná, Brazil
| | - Mateus Seleme Brehmer
- Federal University of Paraná, Department of Bioprocess Engineering and Biotechnology, Centro Politécnico, 81531-980, Curitiba, Paraná, Brazil
| | | | - Parameswaran Binod
- Microbial Processes and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Trivandrum 695 019, Kerala, India
| | - Raveendran Sindhu
- Department of Food Technology, TKM Institute of Technology, Kollam 691 505, Kerala, India
| | - Carlos Ricardo Soccol
- Federal University of Paraná, Department of Bioprocess Engineering and Biotechnology, Centro Politécnico, 81531-980, Curitiba, Paraná, Brazil
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25
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Ben Abdallah M, Chamkha M, Karray F, Sayadi S. Microbial diversity in polyextreme salt flats and their potential applications. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:11371-11405. [PMID: 38180652 DOI: 10.1007/s11356-023-31644-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Accepted: 12/17/2023] [Indexed: 01/06/2024]
Abstract
Recent geological, hydrochemical, and mineralogical studies performed on hypersaline salt flats have given insights into similar geo-morphologic features on Mars. These salt-encrusted depressions are widely spread across the Earth, where they are characterized by high salt concentrations, intense UV radiation, high evaporation, and low precipitation. Their surfaces are completely dry in summer; intermittent flooding occurs in winter turning them into transitory hypersaline lakes. Thanks to new approaches such as culture-dependent, culture-independent, and metagenomic-based methods, it is important to study microbial life under polyextreme conditions and understand what lives in these dynamic ecosystems and how they function. Regarding these particular features, new halophilic microorganisms have been isolated from some salt flats and identified as excellent producers of primary and secondary metabolites and granules such as halocins, enzymes, carotenoids, polyhydroxyalkanoates, and exopolysaccharides. Additionally, halophilic microorganisms are implemented in heavy metal bioremediation and hypersaline wastewater treatment. As a result, there is a growing interest in the distribution of halophilic microorganisms around the world that can be looked upon as good models to develop sustainable biotechnological processes for all fields. This review provides insights into diversity, ecology, metabolism, and genomics of halophiles in hypersaline salt flats worldwide as well as their potential uses in biotechnology.
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Affiliation(s)
- Manel Ben Abdallah
- Laboratory of Environmental Bioprocesses, Centre of Biotechnology of Sfax, BP 1177, 3018, Sfax, Tunisia.
| | - Mohamed Chamkha
- Laboratory of Environmental Bioprocesses, Centre of Biotechnology of Sfax, BP 1177, 3018, Sfax, Tunisia
| | - Fatma Karray
- Laboratory of Environmental Bioprocesses, Centre of Biotechnology of Sfax, BP 1177, 3018, Sfax, Tunisia
| | - Sami Sayadi
- Biotechnology Program, Center for Sustainable Development, College of Arts and Sciences, Qatar University, 2713, Doha, Qatar
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26
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Tyubaeva PM, Gasparyan KG, Romanov RR, Kolesnikov EA, Martirosyan LY, Larkina EA, Tyubaev MA. Biomimetic Materials Based on Poly-3-hydroxybutyrate and Chlorophyll Derivatives. Polymers (Basel) 2023; 16:101. [PMID: 38201766 PMCID: PMC10780539 DOI: 10.3390/polym16010101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Revised: 12/26/2023] [Accepted: 12/27/2023] [Indexed: 01/12/2024] Open
Abstract
Electrospinning of biomimetic materials is of particular interest due to the possibility of producing flexible layers with highly developed surfaces from a wide range of polymers. Additionally, electrospinning is characterized by a high simplicity of implementation and the ability to modify the produced fibrous materials, which resemble structures found in living organisms. This study explores new electrospun materials based on polyhydroxyalkanoates, specifically poly-3-hydroxybutyrate, modified with chlorophyll derivatives. The research investigates the impact of chlorophyll derivatives on the morphology, supramolecular structure, and key properties of nonwoven materials. The obtained results are of interest for the development of new flexible materials with low concentrations of chlorophyll derivatives.
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Affiliation(s)
- Polina M. Tyubaeva
- Department of Physical Chemistry of Synthetic and Natural Polymer Compositions, Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, 4 Kosygina Street, 119334 Moscow, Russia (L.Y.M.)
- Academic Department of Innovational Materials and Technologies Chemistry, Plekhanov Russian University of Economics, 36 Stremyanny Per., 117997 Moscow, Russia; (R.R.R.); (M.A.T.)
| | - Kristina G. Gasparyan
- Department of Physical Chemistry of Synthetic and Natural Polymer Compositions, Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, 4 Kosygina Street, 119334 Moscow, Russia (L.Y.M.)
- Academic Department of Innovational Materials and Technologies Chemistry, Plekhanov Russian University of Economics, 36 Stremyanny Per., 117997 Moscow, Russia; (R.R.R.); (M.A.T.)
| | - Roman R. Romanov
- Academic Department of Innovational Materials and Technologies Chemistry, Plekhanov Russian University of Economics, 36 Stremyanny Per., 117997 Moscow, Russia; (R.R.R.); (M.A.T.)
- Department of Chemistry and Technology of Biologically Active Compounds, Medicinal and Organic Chemistry, Institute of Fine Chemical Technology, MIREA-Russian Technological University, 119454 Moscow, Russia
| | - Evgeny A. Kolesnikov
- Department of Functional Nanosystems and High-Temperature Materials, National University of Science and Technology (MISIS), 119991 Moscow, Russia;
| | - Levon Y. Martirosyan
- Department of Physical Chemistry of Synthetic and Natural Polymer Compositions, Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, 4 Kosygina Street, 119334 Moscow, Russia (L.Y.M.)
| | - Ekaterina A. Larkina
- Department of Chemistry and Technology of Biologically Active Compounds, Medicinal and Organic Chemistry, Institute of Fine Chemical Technology, MIREA-Russian Technological University, 119454 Moscow, Russia
| | - Mikhail A. Tyubaev
- Academic Department of Innovational Materials and Technologies Chemistry, Plekhanov Russian University of Economics, 36 Stremyanny Per., 117997 Moscow, Russia; (R.R.R.); (M.A.T.)
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27
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Bhalerao A, Dueker U, Weber M, Eich A, Lott C, Endres HJ, Nogueira R. Bacterial diversity of biofilms on polyhydroxybutyrate exposed to marine conditions: Ex-situ vs. in-situ tests. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 905:167458. [PMID: 37777124 DOI: 10.1016/j.scitotenv.2023.167458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Revised: 09/18/2023] [Accepted: 09/27/2023] [Indexed: 10/02/2023]
Abstract
Biofilms form on any available surface and, depending on the characteristics of the material and the environmental conditions, biodegradation can take place. We compared the bacterial composition of polyhydroxybutyrate (PHB)-related biofilm communities from marine ex-situ and in-situ tests to assess the differences in diversity and abundance between these two biofilms. This comparison will help to better assess the transferability of tank tests to real-life scenarios. The in-situ tests were set up in the Mediterranean Sea on the Island of Elba, Italy where PHB-tensile bars were lodged in the sediments. This created a water-exposed aerobic and mud-planted anaerobic scenario. The ex-situ tests were modeled after in-situ tests and performed in temperature-controlled tanks. The PHB-related biofilms were harvested after 240 days of exposure along with planktonic bacteria, and particle- and sediment-related biofilm. The bacterial composition was elucidated using 16S rDNA sequencing. Biofilms harvested from the in-situ test were more diverse, less even, and contained more rare species compared to biofilms from the ex-situ test. The PHB-related biofilm was characterized by a higher abundance of the bacterial order Desulfobacterales. The composition of PHB-related biofilm varied significantly between the two tests and between aerobic and anaerobic conditions. The composition of PHB-related biofilm was significantly different from planktonic bacteria, particle, and sediment-related biofilm, showing the influence of PHB on the biofilm composition. Thus, the ex-situ tank test for PHB degradation cannot, in terms of bacterial composition, simulate the in-situ conditions to their full extent.
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Affiliation(s)
- Aniruddha Bhalerao
- Institute of Sanitary Engineering and Waste Management, Leibniz University Hannover, Welfengarten 1, D-30167 Hannover, Germany
| | - Urda Dueker
- Institute of Sanitary Engineering and Waste Management, Leibniz University Hannover, Welfengarten 1, D-30167 Hannover, Germany
| | - Miriam Weber
- HYDRA Marine Sciences GmbH, Steinfeldweg 15, 77815 Bühl, Germany
| | - Andreas Eich
- HYDRA Marine Sciences GmbH, Steinfeldweg 15, 77815 Bühl, Germany
| | - Christian Lott
- HYDRA Marine Sciences GmbH, Steinfeldweg 15, 77815 Bühl, Germany
| | - Hans Josef Endres
- Institute for Plastics and Circulation Technology, Leibniz University Hannover, An der Universität 2, 30823 Garbsen, Germany
| | - Regina Nogueira
- Institute of Sanitary Engineering and Waste Management, Leibniz University Hannover, Welfengarten 1, D-30167 Hannover, Germany.
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28
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Zhao Y, Zhong W. Recent Progress in Advanced Polyester Elastomers for Tissue Engineering and Bioelectronics. Molecules 2023; 28:8025. [PMID: 38138515 PMCID: PMC10745526 DOI: 10.3390/molecules28248025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Revised: 12/06/2023] [Accepted: 12/07/2023] [Indexed: 12/24/2023] Open
Abstract
Polyester elastomers are highly flexible and elastic materials that have demonstrated considerable potential in various biomedical applications including cardiac, vascular, neural, and bone tissue engineering and bioelectronics. Polyesters are desirable candidates for future commercial implants due to their biocompatibility, biodegradability, tunable mechanical properties, and facile synthesis and fabrication methods. The incorporation of bioactive components further improves the therapeutic effects of polyester elastomers in biomedical applications. In this review, novel structural modification methods that contribute to outstanding mechanical behaviors of polyester elastomers are discussed. Recent advances in the application of polyester elastomers in tissue engineering and bioelectronics are outlined and analyzed. A prospective of the future research and development on polyester elastomers is also provided.
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Affiliation(s)
- Yawei Zhao
- Department of Biosystems Engineering, University of Manitoba, Winnipeg, MB R3T 2N2, Canada;
| | - Wen Zhong
- Department of Biosystems Engineering, University of Manitoba, Winnipeg, MB R3T 2N2, Canada;
- Department of Medical Microbiology, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
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29
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Jin A, del Valle LJ, Puiggalí J. Copolymers and Blends Based on 3-Hydroxybutyrate and 3-Hydroxyvalerate Units. Int J Mol Sci 2023; 24:17250. [PMID: 38139077 PMCID: PMC10743438 DOI: 10.3390/ijms242417250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2023] [Revised: 11/29/2023] [Accepted: 12/05/2023] [Indexed: 12/24/2023] Open
Abstract
This review presents a comprehensive update of the biopolymer poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV), emphasizing its production, properties, and applications. The overall biosynthesis pathway of PHBV is explored in detail, highlighting recent advances in production techniques. The inherent physicochemical properties of PHBV, along with its degradation behavior, are discussed in detail. This review also explores various blends and composites of PHBV, demonstrating their potential for a range of applications. Finally, the versatility of PHBV-based materials in multiple sectors is examined, emphasizing their increasing importance in the field of biodegradable polymers.
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Affiliation(s)
- Anyi Jin
- Departament d’Enginyeria Química, Universitat Politècnica de Catalunya, EEBE, Av. Eduard Maristany 10-14, 08019 Barcelona, Spain; (A.J.); (L.J.d.V.)
- Venvirotech Biotechnology S.L., Santa Perpètua de Mogoda, 08130 Barcelona, Spain
| | - Luis J. del Valle
- Departament d’Enginyeria Química, Universitat Politècnica de Catalunya, EEBE, Av. Eduard Maristany 10-14, 08019 Barcelona, Spain; (A.J.); (L.J.d.V.)
- Barcelona Research Center in Multiscale Science and Engineering, Universitat Politècnica de Catalunya, Campus Diagonal-Besòs, Av. Eduard Maristany 10-14, 08019 Barcelona, Spain
| | - Jordi Puiggalí
- Departament d’Enginyeria Química, Universitat Politècnica de Catalunya, EEBE, Av. Eduard Maristany 10-14, 08019 Barcelona, Spain; (A.J.); (L.J.d.V.)
- Barcelona Research Center in Multiscale Science and Engineering, Universitat Politècnica de Catalunya, Campus Diagonal-Besòs, Av. Eduard Maristany 10-14, 08019 Barcelona, Spain
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30
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Bacha S, Arous F, Chouikh E, Jaouani A, Gtari M, Charradi K, Attia H, Ghorbel D. Exploring Bacillus amyloliquefaciens strain OM81 for the production of polyhydroxyalkanoate (PHA) bioplastic using olive mill wastewater. 3 Biotech 2023; 13:415. [PMID: 38009166 PMCID: PMC10667205 DOI: 10.1007/s13205-023-03808-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2023] [Accepted: 10/10/2023] [Indexed: 11/28/2023] Open
Abstract
In this study, bacterial strains isolated from olive oil mill wastewater assigned to Bacillus (n = 4) and Klebsiella (n = 1) genera, were evaluated for their ability to accumulate intracellular PHA granules using Sudan Black staining. A maximum PHA production of 0.14 g/L (i.e., 30.2% wt./wt. in dry biomass) was observed in Bacillus amyloliquefaciens strain OM81 after 72 h of incubation in the presence of 2% glucose (synthetic medium). To reduce bioplastic production costs and recover a polluting product, olive mill wastewater was tested as a carbon source. In this context, the maximum growth (1.45 g/L) was observed in the presence of 50% olive mill wastewater. After extracting the biopolymers with chloroform, quantitative and qualitative analyses were conducted using Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), and thermogravimetric analysis (TGA). FTIR showed an absorption band at 1730 cm-1 assigned to the elongation of the PHB carbonyl groups. This approach offers a dual benefit of reducing pollution and bioplastic production costs. The Bacillus amyloliquefaciens strain OM81 showed promising results for PHAs production, making it a potential candidate for further investigation. Supplementary Information The online version contains supplementary material available at 10.1007/s13205-023-03808-4.
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Affiliation(s)
- Samar Bacha
- University of Carthage, INSAT, Centre Urbain Nord, B.P. 676, 1080 Tunis, Tunisia
| | - Fatma Arous
- LR22ES04 Bioresources, Environment and Biotechnologies (BeB), University of Tunis El Manar, Higher Institute of Applied Biological Sciences of Tunis, 1006 Tunis, Tunisia
| | - Emna Chouikh
- University of Carthage, INSAT, Centre Urbain Nord, B.P. 676, 1080 Tunis, Tunisia
| | - Atef Jaouani
- LR22ES04 Bioresources, Environment and Biotechnologies (BeB), University of Tunis El Manar, Higher Institute of Applied Biological Sciences of Tunis, 1006 Tunis, Tunisia
| | - Maher Gtari
- University of Carthage, INSAT, Centre Urbain Nord, B.P. 676, 1080 Tunis, Tunisia
- USCR Bactériologie Moléculaire & Génomique, INSAT, Centre Urbain Nord, B.P. 676, 1080 Tunis, Tunisia
- Food Analysis, Valorization, and Safety Laboratory, LAVASA, LR11ES45, BPW, University of Sfax, ENIS, 3038 Sfax, Tunisia
| | - Khaled Charradi
- Nanomaterials and Systems for Renewable Energy Laboratory, Research and Technology Center of Energy, Technopark Borj Cedria, BP 095, Hammam-Lif, Tunisia
| | - Hamadi Attia
- Food Analysis, Valorization, and Safety Laboratory, LAVASA, LR11ES45, BPW, University of Sfax, ENIS, 3038 Sfax, Tunisia
| | - Dorra Ghorbel
- University of Carthage, INSAT, Centre Urbain Nord, B.P. 676, 1080 Tunis, Tunisia
- Food Analysis, Valorization, and Safety Laboratory, LAVASA, LR11ES45, BPW, University of Sfax, ENIS, 3038 Sfax, Tunisia
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31
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Lee OK, Kang SG, Choi TR, Yang YH, Lee EY. Production and characterization of a biodegradable polymer, poly(3-hydroxybutyrate-co-3-hydroxyvalerate), using the type II methanotroph, Methylocystis sp. MJC1. BIORESOURCE TECHNOLOGY 2023; 389:129853. [PMID: 37813313 DOI: 10.1016/j.biortech.2023.129853] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Revised: 10/06/2023] [Accepted: 10/06/2023] [Indexed: 10/11/2023]
Abstract
The production of polyhydroxyalkanoates (PHAs) through the biological conversion of methane is a promising solution to address both methane emissions and plastic waste. Type II methanotrophs naturally accumulate a representative PHA, poly(3-hydroxybutyrate) (PHB), using methane as the sole carbon source. In this study, we aimed to produce poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV copolymer) with improved properties compared with PHB, using the type II methanotroph, Methylocystis sp. MJC1. We optimized the pH, valerate concentration, and valerate supply time in a one-step cultivation process using a gas bioreactor to enhance PHBV copolymer production yield and the 3-hydroxyvalerate (3HV) molar fraction. Under the optimal conditions, the biomass reached 21.3 g DCW/L, and PHBV copolymer accumulation accounted for 41.9 % of the dried cell weight, with a 3HV molar fraction of 28.4 %. The physicochemical properties of the purified PHBV copolymer were characterized using NMR, FTIR, TGA, DSC, and GPC.
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Affiliation(s)
- Ok Kyung Lee
- Department of Chemical Engineering (BK21 FOUR Integrated Engineering Program), Kyung Hee University, Yongin-si, Gyeonggi-do 17104, Republic of Korea
| | - Seung Gi Kang
- Department of Chemical Engineering (BK21 FOUR Integrated Engineering Program), Kyung Hee University, Yongin-si, Gyeonggi-do 17104, Republic of Korea
| | - Tae-Rim Choi
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea
| | - Yung-Hun Yang
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea
| | - Eun Yeol Lee
- Department of Chemical Engineering (BK21 FOUR Integrated Engineering Program), Kyung Hee University, Yongin-si, Gyeonggi-do 17104, Republic of Korea.
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de Sousa Junior RR, Cezario FEM, Antonino LD, dos Santos DJ, Lackner M. Characterization of Poly(3-hydroxybutyrate) (P3HB) from Alternative, Scalable (Waste) Feedstocks. Bioengineering (Basel) 2023; 10:1382. [PMID: 38135973 PMCID: PMC10740857 DOI: 10.3390/bioengineering10121382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 11/23/2023] [Accepted: 11/29/2023] [Indexed: 12/24/2023] Open
Abstract
Bioplastics hold significant promise in replacing conventional plastic materials, linked to various serious issues such as fossil resource consumption, microplastic formation, non-degradability, and limited end-of-life options. Among bioplastics, polyhydroxyalkanoates (PHA) emerge as an intriguing class, with poly(3-hydroxybutyrate) (P3HB) being the most utilized. The extensive application of P3HB encounters a challenge due to its high production costs, prompting the investigation of sustainable alternatives, including the utilization of waste and new production routes involving CO2 and CH4. This study provides a valuable comparison of two P3HBs synthesized through distinct routes: one via cyanobacteria (Synechocystis sp. PCC 6714) for photoautotrophic production and the other via methanotrophic bacteria (Methylocystis sp. GB 25) for chemoautotrophic growth. This research evaluates the thermal and mechanical properties, including the aging effect over 21 days, demonstrating that both P3HBs are comparable, exhibiting physical properties similar to standard P3HBs. The results highlight the promising potential of P3HBs obtained through alternative routes as biomaterials, thereby contributing to the transition toward more sustainable alternatives to fossil polymers.
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Affiliation(s)
- Rogerio Ramos de Sousa Junior
- Center for Engineering, Modeling and Applied Social Sciences, Federal University of ABC, Santo André 09210-580, Brazil; (R.R.d.S.J.); (F.E.M.C.); (L.D.A.)
| | - Fabiano Eduardo Marques Cezario
- Center for Engineering, Modeling and Applied Social Sciences, Federal University of ABC, Santo André 09210-580, Brazil; (R.R.d.S.J.); (F.E.M.C.); (L.D.A.)
| | - Leonardo Dalseno Antonino
- Center for Engineering, Modeling and Applied Social Sciences, Federal University of ABC, Santo André 09210-580, Brazil; (R.R.d.S.J.); (F.E.M.C.); (L.D.A.)
| | - Demetrio Jackson dos Santos
- Center for Engineering, Modeling and Applied Social Sciences, Federal University of ABC, Santo André 09210-580, Brazil; (R.R.d.S.J.); (F.E.M.C.); (L.D.A.)
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Grimaldo E, Karl CW, Alvestad A, Persson AM, Kubowicz S, Olafsen K, Hatlebrekke HH, Lilleng G, Brinkhof I. Reducing plastic pollution caused by demersal fisheries. MARINE POLLUTION BULLETIN 2023; 196:115634. [PMID: 37813057 DOI: 10.1016/j.marpolbul.2023.115634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Revised: 10/02/2023] [Accepted: 10/04/2023] [Indexed: 10/11/2023]
Abstract
Marine microplastics generated by wear and tear of bottom trawls and demersal seines during their service life is a growing environmental concern that requires immediate attention. In Norway, these fishing gears account for more than 70 % of the landings of demersal fish species, but they are also the leading sources of microplastics generated by fisheries. Because these two fishing gears are widely used around the world, replacing fossil-based non-degradable plastics with more abrasion-resistant materials, including biodegradable polymers, should contribute to the reduction of marine litter and its associated environmental impacts. However, the lack of available recycling techniques and the need for separate collection of biodegradable polymers means that these materials will most likely be incinerated for energy recovery, which is not favourable from a circular economy perspective. Nonetheless, from an environmental perspective the use of such biodegradable polymers in demersal fisheries could still be a better alternative to standard polymer materials.
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Affiliation(s)
- Eduardo Grimaldo
- SINTEF Ocean, Fisheries Technology, Brattørkaia 17C, 7010 Trondheim, Norway; UiT, The Arctic University of Norway, Breivika, N-9037 Tromsø, Norway.
| | - Christian W Karl
- SINTEF Industry, Polymer and Composite Materials, Forskningsveien 1, 0373 Oslo, Norway
| | - Anja Alvestad
- SINTEF Ocean, Fisheries Technology, Brattørkaia 17C, 7010 Trondheim, Norway
| | - Anna-Maria Persson
- SINTEF Industry, Polymer and Composite Materials, Forskningsveien 1, 0373 Oslo, Norway
| | - Stephan Kubowicz
- SINTEF Industry, Polymer and Composite Materials, Forskningsveien 1, 0373 Oslo, Norway
| | - Kjell Olafsen
- SINTEF Industry, Polymer and Composite Materials, Forskningsveien 1, 0373 Oslo, Norway
| | | | | | - Ilmar Brinkhof
- UiT, The Arctic University of Norway, Breivika, N-9037 Tromsø, Norway
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Adamu Ugya Y, Chen H, Sheng Y, Ajibade FO, Wang Q. A review of microalgae biofilm as an eco-friendly approach to bioplastics, promoting environmental sustainability. ENVIRONMENTAL RESEARCH 2023; 236:116833. [PMID: 37543134 DOI: 10.1016/j.envres.2023.116833] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2023] [Revised: 07/17/2023] [Accepted: 08/03/2023] [Indexed: 08/07/2023]
Abstract
In this comprehensive review, we delve into the challenges hindering the large-scale production of microalgae-based bioplastics, primarily focusing on economic feasibility and bioplastic quality. To address these issues, we explore the potential of microalgae biofilm cultivation as a sustainable and highly viable approach for bioplastic production. We present a proposed method for producing bioplastics using microalgae biofilm and evaluate its environmental impact using various tools such as life cycle analysis (LCA), ecological footprint analysis, resource flow analysis, and resource accounting. While pilot-scale and large-scale LCA data are limited, we utilize alternative indicators such as energy efficiency, carbon footprint, materials management, and community acceptance to predict the environmental implications of commercializing microalgae biofilm-based bioplastics. The findings of this study indicate that utilizing microalgae biofilm for bioplastic production offers significant environmental sustainability benefits. The system exhibits low energy requirements and a minimal carbon footprint. Moreover, it has the potential to address the issue of wastewater by utilizing it as a carbon source, thereby mitigating associated problems. However, it is important to acknowledge certain limitations associated with the method proposed in this review. Further research is needed to explore and engineer precise techniques for manipulating microalgae biofilm structure to optimize the accumulation of desired metabolites. This could involve employing chemical triggers, metabolic engineering, and genetic engineering to achieve the intended goals. In conclusion, this review highlights the potential of microalgae biofilm as a viable and sustainable solution for bioplastic production. While acknowledging the advantages, it also emphasizes the need for continued synthetic studies to enhance the efficiency and reliability of this approach. By addressing the identified drawbacks and maximizing the utilization of advanced techniques, we can further harness the potential of microalgae biofilm in contributing to a more environmentally friendly and economically feasible bioplastic industry.
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Affiliation(s)
- Yunusa Adamu Ugya
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng, China; Academy for Advanced Interdisciplinary Studies, Henan University, Kaifeng, China; Department of Environmental Management, Kaduna State University, Kaduna State, Nigeria
| | - Hui Chen
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng, China; Academy for Advanced Interdisciplinary Studies, Henan University, Kaifeng, China
| | - Yangyang Sheng
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng, China
| | - Fidelis Odedishemi Ajibade
- Department of Civil and Environmental Engineering, Federal University of Technology Akure, PMB 704, Nigeria
| | - Qiang Wang
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng, China; Academy for Advanced Interdisciplinary Studies, Henan University, Kaifeng, China.
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Rofeal M, Abdelmalek F, Pietrasik J. Sustainable Polyhydroxyalkanoate Production from Food Waste via Bacillus mycoides ICRI89: Enhanced 3D Printing with Poly (Methyl Methacrylate) Blend. Polymers (Basel) 2023; 15:4173. [PMID: 37896417 PMCID: PMC10610804 DOI: 10.3390/polym15204173] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 10/08/2023] [Accepted: 10/18/2023] [Indexed: 10/29/2023] Open
Abstract
In view of implementing green technologies for bioplastic turning polices, novel durable feedstock for Bacillus mycoides ICRI89 used for efficient polyhydroxybutyrate (PHB) generation is proposed herein. First, two food waste (FW) pretreatment methods were compared, where the ultrasonication approach for 7 min was effective in easing the following enzymatic action. After treatment with a mixture of cellulase/amylases, an impressive 25.3 ± 0.22 g/L of glucose was liberated per 50 g of FW. Furthermore, a notable 2.11 ± 0.06 g/L PHB and 3.56 ± 0.11 g/L cell dry eight (CDW) over 120 h were generated, representing a productivity percentage of 59.3 wt% using 25% FW hydrolysate. The blend of polyhydroxybutyrate/poly (methyl methacrylate) (PHB/PMMA = 1:2) possessed the most satisfactory mechanical properties. For the first time, PHB was chemically crosslinked with PMMA using dicumyl peroxide (DCP), where a concentration of 0.3 wt% had a considerable effect on increasing the mechanical stability of the blend. FTIR analysis confirmed the molecular interaction between PHB and PMMA showing a modest expansion of the C=O stretching vibration at 1725 cm-1. The DCP-PHB/PMMA blend had significant thermal stability and biodegradation profiles comparable to those of the main constituent polymers. More importantly, a 3-Dimetional (3D) filament was successfully extruded with a diameter of 1.75 mm, where no blockages or air bubbles were noticed via SEM. A new PHB/PMMA "key of life" 3D model has been printed with a filling percentage of 60% and a short printing time of 19.2 min. To conclude, high-performance polymeric 3D models have been fabricated to meet the pressing demands for future applications of sustainable polymers.
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Affiliation(s)
- Marian Rofeal
- International Center for Research on Innovative Biobased Materials (ICRI-BioM)—International Research Agenda, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland
- Department of Botany and Microbiology, Faculty of Science, Alexandria University, Alexandria 21521, Egypt
- Chemical Engineering Department, Polytechnique Montreal, Montreal, QC H3T 1J4, Canada
| | - Fady Abdelmalek
- International Center for Research on Innovative Biobased Materials (ICRI-BioM)—International Research Agenda, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland
- Department of Engineering Physics, Polytechnique Montreal, Montreal, QC H3T 1J4, Canada
| | - Joanna Pietrasik
- Faculty of Chemistry, Institute of Polymer and Dye Technology, Lodz University of Technology, Stefanowskiego 16, 90-537 Lodz, Poland;
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Jeon D, Jiang L, Kim KH, Peng Y, Cho D, Jeong RD, Kim CY, Jeong JC, Lee J. Bioplastic (poly-3-hydroxybutyrate)-producing Massilia endophytica sp. nov., isolated from Cannabis sativa L. 'Cheungsam'. Sci Rep 2023; 13:17767. [PMID: 37853022 PMCID: PMC10584911 DOI: 10.1038/s41598-023-44976-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Accepted: 10/14/2023] [Indexed: 10/20/2023] Open
Abstract
A rod-shaped, motile, Gram-negative bacterial strain named DM-R-R2A-13T was isolated from the plant Cannabis sativa L. 'Cheungsam'. The phylogenetic analysis of the 16S rRNA gene sequence revealed that strain DM-R-R2A-13T belongs to the family Oxalobacteraceae and is closely related to members of the genus Massilia, with Massilia flava (97.58% sequence similarity) and Massilia armeniaca (97.37% sequence similarity) being the closest members. The digital DNA-DNA hybridization (dDDH) values between strain DM-R-R2A-13T and Massilia flava CGMCC 1.10685T and Massilia armeniaca ZMN-3Twere 22.2% and 23.3%, while the average nucleotide identity (ANI) values were 78.85% and 79.63%, respectively. The DNA G+C content was measured to be 64.6 mol%. Moreover, the bacterium was found to contain polyhydroxyalkanoate (PHA) granules based on transmission electron microscopy, indicating its potential to produce bioplastic. Genome annotation revealed the presence of PHA synthase genes (phaC, phaR, phaP, and phaZ), and the biopolymer was identified as poly-3-hydroxybutyrate (PHB) based on nuclear magnetic resonance (NMR) and Fourier transform infrared spectroscopy (FTIR) analyses. Using maltose as a carbon source, the strain produced PHB of up to 58.06% of its dry cell weight. Based on the phenotypic, chemotaxonomic, and phylogenetic characteristics, it has been determined that DM-R-R2A-13T represents a novel species belonging to the genus Massilia. As such, the name Massilia endophytica sp. nov. is proposed for this newly identified species. The type strain is DM-R-R2A-13T (= KCTC 92072T = GDMCC 1.2920T).
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Affiliation(s)
- Doeun Jeon
- Korean Collection for Type Cultures (KCTC), Biological Resource Center, Korea Research Institute of Bioscience and Biotechnology, Jeongeup, 56212, Republic of Korea
- Department of Applied Biology, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Lingmin Jiang
- Korean Collection for Type Cultures (KCTC), Biological Resource Center, Korea Research Institute of Bioscience and Biotechnology, Jeongeup, 56212, Republic of Korea
| | - Ki-Hyun Kim
- Korean Collection for Type Cultures (KCTC), Biological Resource Center, Korea Research Institute of Bioscience and Biotechnology, Jeongeup, 56212, Republic of Korea
| | - Yuxin Peng
- Korean Collection for Type Cultures (KCTC), Biological Resource Center, Korea Research Institute of Bioscience and Biotechnology, Jeongeup, 56212, Republic of Korea
| | - Donghyun Cho
- Korean Collection for Type Cultures (KCTC), Biological Resource Center, Korea Research Institute of Bioscience and Biotechnology, Jeongeup, 56212, Republic of Korea
- Department of Applied Biology, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Rae-Dong Jeong
- Department of Applied Biology, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Cha Young Kim
- Korean Collection for Type Cultures (KCTC), Biological Resource Center, Korea Research Institute of Bioscience and Biotechnology, Jeongeup, 56212, Republic of Korea
| | - Jae Cheol Jeong
- Korean Collection for Type Cultures (KCTC), Biological Resource Center, Korea Research Institute of Bioscience and Biotechnology, Jeongeup, 56212, Republic of Korea
| | - Jiyoung Lee
- Korean Collection for Type Cultures (KCTC), Biological Resource Center, Korea Research Institute of Bioscience and Biotechnology, Jeongeup, 56212, Republic of Korea.
- Department of Biosystems and Bioengineering, KRIBB School of Biotechnology, University of Science and Technology (UST), Yuseong, Daejeon, 34113, Republic of Korea.
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Main P, Petersmann S, Wild N, Feuchter M, Duretek I, Edeleva M, Ragaert P, Cardon L, Lucyshyn T. Impact of Multiple Reprocessing on Properties of Polyhydroxybutyrate and Polypropylene. Polymers (Basel) 2023; 15:4126. [PMID: 37896370 PMCID: PMC10611211 DOI: 10.3390/polym15204126] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Revised: 10/12/2023] [Accepted: 10/13/2023] [Indexed: 10/29/2023] Open
Abstract
Biobased plastics have the potential to be sustainable, but to explore their circularity further, current end-of-life options need to be broadened. Mechanical recycling is one of the most accepted methods to bring back plastics into the loop. Polyhydroxybutyrates (PHBs) are biobased and biodegradable in nature with promising properties and varied applications in the market. This study focuses on their potential for mechanical recycling by multiple extrusion cycles (E1-E5) and multi-faceted characterization of the virgin (V) and reprocessed materials from E1 to E5. The behavior is compared to polypropylene (PP) as a reference with a similar property profile, which has also been reprocessed five times. The thermal properties of both series showed a stable melting point and thermal decomposition temperature from thermal analyses (differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA)). However, a steady increase in the degree of crystallinity was observed which could counterbalance the decrease in molecular weight due to repeated extrusion measured by gel permeation chromatography and resulted in similar values of tensile strength across the cycles. The strain at break was impacted after the first extrusion, but no significant change was observed thereafter; the same was observed for impact strength. Even in scanning electron microscopy (SEM) images, virgin and E5 samples appeared similar, showing the stability of morphological characteristics. Fourier transform infrared spectroscopy (FTIR) results revealed that no new groups are being formed even on repeated processing. The deviation between the PHB and PP series was more predominant in the melt mass flow rate (MFR) and rheology studies. There was a drastic drop in the MFR values in PHB from virgin to E5, whereas not much difference was observed for PP throughout the cycles. This observation was corroborated by frequency sweeps conducted with the parallel plate method. The viscosity dropped from virgin to E1 and E2, but from E3 to E5 it presented similar values. This was in contrast to PP, where all the samples from virgin to E5 had the same values of viscosity. This paper highlights the possibilities of mechanical recycling of PHB and explains why future work with the addition of virgin material and other additives is an area to be explored.
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Affiliation(s)
- Priyanka Main
- Polymer Processing, Montanuniversitaet Leoben, Otto-Gloeckel-Straße 2, 8700 Leoben, Austria;
- Faculty of Engineering and Architecture, Centre for Polymer and Material Technologies, Ghent University, Technologiepark Zwijnaarde 130 (Zone C3), 9052 Zwijnaarde, Belgium; (M.E.); (L.C.)
- Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000 Gent, Belgium;
| | - Sandra Petersmann
- Materials Science and Testing of Polymers, Montanuniversitaet Leoben, Otto Gloeckel-Straße 2, 8700 Leoben, Austria; (S.P.); (N.W.); (M.F.)
| | - Nadine Wild
- Materials Science and Testing of Polymers, Montanuniversitaet Leoben, Otto Gloeckel-Straße 2, 8700 Leoben, Austria; (S.P.); (N.W.); (M.F.)
| | - Michael Feuchter
- Materials Science and Testing of Polymers, Montanuniversitaet Leoben, Otto Gloeckel-Straße 2, 8700 Leoben, Austria; (S.P.); (N.W.); (M.F.)
| | - Ivica Duretek
- Polymer Processing, Montanuniversitaet Leoben, Otto-Gloeckel-Straße 2, 8700 Leoben, Austria;
| | - Mariya Edeleva
- Faculty of Engineering and Architecture, Centre for Polymer and Material Technologies, Ghent University, Technologiepark Zwijnaarde 130 (Zone C3), 9052 Zwijnaarde, Belgium; (M.E.); (L.C.)
| | - Peter Ragaert
- Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000 Gent, Belgium;
| | - Ludwig Cardon
- Faculty of Engineering and Architecture, Centre for Polymer and Material Technologies, Ghent University, Technologiepark Zwijnaarde 130 (Zone C3), 9052 Zwijnaarde, Belgium; (M.E.); (L.C.)
| | - Thomas Lucyshyn
- Polymer Processing, Montanuniversitaet Leoben, Otto-Gloeckel-Straße 2, 8700 Leoben, Austria;
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Sydow A, Becker L, Lombard E, Ulber R, Guillouet SE, Holtmann D. Autotrophic Production of the Sesquiterpene α-Humulene with Cupriavidus necator in a Controlled Bioreactor. Bioengineering (Basel) 2023; 10:1194. [PMID: 37892924 PMCID: PMC10603880 DOI: 10.3390/bioengineering10101194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2023] [Revised: 10/07/2023] [Accepted: 10/08/2023] [Indexed: 10/29/2023] Open
Abstract
Cupriavidus necator is a facultative chemolithotrophic organism that grows under both heterotrophic and autotrophic conditions. It is becoming increasingly important due to its ability to convert CO2 into industrially valuable chemicals. To translate the potential of C. necator into technical applications, it is necessary to optimize and scale up production processes. A previous proof-of-principle study showed that C. necator can be used for the de novo production of the terpene α-humulene from CO2 up to concentrations of 11 mg L-1 in septum flasks. However, an increase in final product titer and space-time yield will be necessary to establish an economically viable industrial process. To ensure optimized growth and production conditions, the application of an improved process design in a gas bioreactor with the control of pH, dissolved oxygen and temperature including a controlled gas supply was investigated. In the controlled gas bioreactor, the concentration of α-humulene was improved by a factor of 6.6 and the space-time yield was improved by a factor of 13.2. These results represent an important step toward the autotrophic production of high-value chemicals from CO2. In addition, the in situ product removal of α-humulene was investigated and important indications of the critical logP value were obtained, which was in the range of 3.0-4.2.
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Affiliation(s)
- Anne Sydow
- Industrial Biotechnology, DECHEMA Research Institute, Theodor Heuss Allee 25, 60486 Frankfurt, Germany
| | - Lucas Becker
- Bioprocess Intensification, Institute of Bioprocess Engineering and Pharmaceutical Technology, Technische Hochschule Mittelhessen, Wiesenstrasse 14, 35390 Giessen, Germany
| | - Eric Lombard
- TBI, Université de Toulouse, National Institute of Applied Sciences (INSA), 135 Avenue de Rangueil, 31077 Toulouse, France
| | - Roland Ulber
- Institute of Bioprocess Engineering, University of Kaiserslautern-Landau, Gottlieb-Daimler-Straße 49, 67663 Kaiserslautern, Germany
| | - Stephane E. Guillouet
- TBI, Université de Toulouse, National Institute of Applied Sciences (INSA), 135 Avenue de Rangueil, 31077 Toulouse, France
| | - Dirk Holtmann
- Bioprocess Intensification, Institute of Bioprocess Engineering and Pharmaceutical Technology, Technische Hochschule Mittelhessen, Wiesenstrasse 14, 35390 Giessen, Germany
- Institute of Process Engineering in Life Sciences, Karlsruhe Institute of Technology, Fritz-Haber-Weg 4, 76131 Karlsruhe, Germany
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Krieg D, Müller MT, Boldt R, Rennert M, Stommel M. Additive Free Crosslinking of Poly-3-hydroxybutyrate via Electron Beam Irradiation at Elevated Temperatures. Polymers (Basel) 2023; 15:4072. [PMID: 37896317 PMCID: PMC10610128 DOI: 10.3390/polym15204072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 10/05/2023] [Accepted: 10/09/2023] [Indexed: 10/29/2023] Open
Abstract
When applying electron or gamma irradiation to poly-3-hydroxybutyrate (P3HB), main chain scissions are the dominant material reactions. Though propositions have been made that crosslinking in the amorphous phase of P3HB occurs under irradiation, a conclusive method to achieve controlled additive free irradiation crosslinking has not been shown and no mechanism has been derived to the best of our knowledge. By applying irradiation in a molten state at 195 °C and doses above 200 kGy, we were able to initiate crosslink reactions and achieved gel formation of up to 16%. The gel dose Dgel was determined to be 200 kGy and a range of the G values, the number of scissions and crosslinks for 100 eV energy deposition, is given. Rheology measurements, as well as size exclusion chromatography (SEC), showed indications for branching at doses from 100 to 250 kGy. Thermal analysis showed the development of a bimodal peak with a decrease in the peak melt temperature and an increase in peak width. In combination with an increase in the thermal degradation temperature for a dose of 200 kGy compared to 100 kGy, thermal analysis also showed phenomena attributed to branching and crosslinking.
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Affiliation(s)
- David Krieg
- Institute for Circular Economy of Bio:Polymers at Hof University (ibp), 95028 Hof, Germany;
| | - Michael Thomas Müller
- Leibniz-Institut für Polymerforschung Dresden e.V., 01069 Dresden, Germany; (M.T.M.); (R.B.)
| | - Regine Boldt
- Leibniz-Institut für Polymerforschung Dresden e.V., 01069 Dresden, Germany; (M.T.M.); (R.B.)
| | - Mirko Rennert
- Institute for Circular Economy of Bio:Polymers at Hof University (ibp), 95028 Hof, Germany;
| | - Markus Stommel
- Leibniz-Institut für Polymerforschung Dresden e.V., 01069 Dresden, Germany; (M.T.M.); (R.B.)
- Institute of Material Science, Technical University Dresden, 01069 Dresden, Germany
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40
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Zeng J, Zhan J, Qiao X, Fidan O. Editorial: Microbial production of medicinally important agents. Front Microbiol 2023; 14:1274087. [PMID: 37799599 PMCID: PMC10548376 DOI: 10.3389/fmicb.2023.1274087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Accepted: 09/04/2023] [Indexed: 10/07/2023] Open
Affiliation(s)
- Jia Zeng
- Thermo Fisher Scientific, San Jose, CA, United States
| | - Jixun Zhan
- Department of Biological Engineering, Utah State University, Logan, UT, United States
| | - Xue Qiao
- Department of Pharmaceutical Analysis, School of Pharmaceutical Sciences, Health Science Centre, Peking University, Beijing, China
| | - Ozkan Fidan
- Department of Bioengineering, Abdullah Gül University, Kayseri, Türkiye
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Ahuja S, Bains O, Mittal M, Kamal R, Aggarwal NK, Arora S. Multifunctional chromone-incorporated poly(hydroxybutyrate) luminescent film for active and intelligent food packaging. Int J Biol Macromol 2023; 246:125625. [PMID: 37392906 DOI: 10.1016/j.ijbiomac.2023.125625] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 06/14/2023] [Accepted: 06/28/2023] [Indexed: 07/03/2023]
Abstract
The major objective of present work was to fabricate poly(hydroxybutyrate) based luminescent films for genuine food packaging applications. These films were synthesized by incorporating varying Chromone (CH) concentrations (5, 10, 15, 20, and 25 wt%) into poly(hydroxybutyrate) (PHB) matrix through solvent-casting. Different characteristics of prepared films were examined using Fourier transform infrared spectroscopy (FTIR), Scanning electron microscopy (SEM), Thermogravimetric analysis (TGA), Mechanical testing, and Time-resolved photoluminescence (TRPL). UV-blocking properties and water vapor permeation were also examined. FTIR spectra indicated the occurrence of hydrogen bonding between PHB and CH. Among all prepared film samples, PHB/CH15 showed maximum tensile strength (22.5 MPa) with enhanced barrier ability against water vapor and UV rays, thermal stability, and luminescent performance. After overall analysis, PHB/CH15 film was selected to investigate its X-ray diffraction, release behavior, DPPH scavenging, and antimicrobial potential. Release kinetics revealed that the cumulative release percentage of CH was higher in fatty acid stimulant. Moreover, results suggested that this film demonstrated antioxidant activity (>55 %) and superior antimicrobial potential against Aspergillus niger, Staphylococcus aureus, and Escherichia coli. Furthermore, packaging of bread samples using PHB/CH15 film demonstrated the complete inhibition of microbial growth in bread up to 10 days of storage and ensure the safety of genuine food products.
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Affiliation(s)
- Simran Ahuja
- Department of Chemistry, Kurukshetra University, Kurukshetra 136119, India.
| | - Omkar Bains
- Department of Chemistry, Kurukshetra University, Kurukshetra 136119, India
| | - Mahak Mittal
- Department of Microbiology, Kurukshetra University, Kurukshetra 136119, India
| | - Raj Kamal
- Department of Chemistry, Kurukshetra University, Kurukshetra 136119, India
| | - Neeraj K Aggarwal
- Department of Microbiology, Kurukshetra University, Kurukshetra 136119, India.
| | - Sanjiv Arora
- Department of Chemistry, Kurukshetra University, Kurukshetra 136119, India.
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42
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Pereira J, Neves P, Nemanic V, Pereira MA, Sleutels T, Hamelers B, Heijne AT. Starvation combined with constant anode potential triggers intracellular electron storage in electro-active biofilms. WATER RESEARCH 2023; 242:120278. [PMID: 37413745 DOI: 10.1016/j.watres.2023.120278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Revised: 06/13/2023] [Accepted: 06/26/2023] [Indexed: 07/08/2023]
Abstract
The accumulation of electrons in the form of Extracellular Polymeric Substances (EPS) and poly-hydroxyalkanoates (PHA) has been studied in anaerobic processes by adjusting the access of microorganisms to the electron donor and final electron acceptor. In Bio-electrochemical systems (BESs), intermittent anode potential regimes have also recently been used to study electron storage in anodic electro-active biofilms (EABfs), but the effect of electron donor feeding mode on electron storage has not been explored. Therefore, in this study, the accumulation of electrons in the form of EPS and PHA was studied as a function of the operating conditions. EABfs were grown under both constant and intermittent anode potential regimes and fed with acetate (electron donor) continuously or in batch. Confocal Laser Scanning Microscopy (CLSM) and Fourier-Transform Infrared Spectroscopy (FTIR) were used to assess electron storage. The range of Coulombic efficiencies, from 25 to 82%, and the biomass yields, between 10 and 20%, indicate that storage could have been an alternative electron consuming process. From image processing, a 0.92 pixel ratio of poly-hydroxybutyrate (PHB) and amount of cells was found in the batch fed EABf grown under a constant anode potential. This storage was linked to the presence of living Geobacter and shows that energy gain and carbon source starvation were the triggers for intracellular electron storage. The highest EPS content (extracellular storage) was observed in the continuously fed EABf under an intermittent anode potential, showing that constant access to electron donor and intermittent access to the electron acceptor leads to the formation of EPS from the excess energy gained. Tailoring operating conditions can thus steer the microbial community and result in a trained EABf to perform a desired biological conversion, which can be beneficial for a more efficient and optimized BES.
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Affiliation(s)
- João Pereira
- Wetsus, European Centre of Excellence for Sustainable Water Technology, Oostergoweg 9, 8911 MA, Leeuwarden, the Netherlands; Environmental Technology, Wageningen University, Bornse Weilanden 9, P.O. Box 17, 6700 AA, Wageningen, the Netherlands
| | - Patrícia Neves
- Wetsus, European Centre of Excellence for Sustainable Water Technology, Oostergoweg 9, 8911 MA, Leeuwarden, the Netherlands; Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Vivian Nemanic
- Wetsus, European Centre of Excellence for Sustainable Water Technology, Oostergoweg 9, 8911 MA, Leeuwarden, the Netherlands
| | - Maria Alcina Pereira
- Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal; LABBELS -Associate Laboratory, Braga/Guimarães, Portugal
| | - Tom Sleutels
- Wetsus, European Centre of Excellence for Sustainable Water Technology, Oostergoweg 9, 8911 MA, Leeuwarden, the Netherlands; Faculty of Science and Engineering, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, the Netherlands
| | - Bert Hamelers
- Wetsus, European Centre of Excellence for Sustainable Water Technology, Oostergoweg 9, 8911 MA, Leeuwarden, the Netherlands; Environmental Technology, Wageningen University, Bornse Weilanden 9, P.O. Box 17, 6700 AA, Wageningen, the Netherlands
| | - Annemiek Ter Heijne
- Environmental Technology, Wageningen University, Bornse Weilanden 9, P.O. Box 17, 6700 AA, Wageningen, the Netherlands.
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Martínez MDLÁM, Urzúa LS, Carrillo YA, Ramírez MB, Morales LJM. Polyhydroxybutyrate Metabolism in Azospirillum brasilense and Its Applications, a Review. Polymers (Basel) 2023; 15:3027. [PMID: 37514417 PMCID: PMC10383645 DOI: 10.3390/polym15143027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 06/28/2023] [Accepted: 07/06/2023] [Indexed: 07/30/2023] Open
Abstract
Gram-negative Azospirillum brasilense accumulates approximately 80% of polyhydroxybutyrate (PHB) as dry cell weight. For this reason, this bacterium has been characterized as one of the main microorganisms that produce PHB. PHB is synthesized inside bacteria by the polymerization of 3-hydroxybutyrate monomers. In this review, we are focusing on the analysis of the PHB production by A. brasilense in order to understand the metabolism during PHB accumulation. First, the carbon and nitrogen sources used to improve PHB accumulation are discussed. A. brasilense accumulates more PHB when it is grown on a minimal medium containing a high C/N ratio, mainly from malate and ammonia chloride, respectively. The metabolic pathways to accumulate and mobilize PHB in A. brasilense are mentioned and compared with those of other microorganisms. Next, we summarize the available information to understand the role of the genes involved in the regulation of PHB metabolism as well as the role of PHB in the physiology of Azospirillum. Finally, we made a comparison between the properties of PHB and polypropylene, and we discussed some applications of PHB in biomedical and commercial areas.
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Affiliation(s)
- María de Los Ángeles Martínez Martínez
- Centro de Investigaciones en Ciencias Microbiológicas, Instituto de Ciencias, Benemérita Universidad Autónoma de Puebla, Av. San Claudio y Av. 24 Sur, Col. San Manuel Ciudad Universitaria, Puebla 72570, Mexico
| | - Lucía Soto Urzúa
- Centro de Investigaciones en Ciencias Microbiológicas, Instituto de Ciencias, Benemérita Universidad Autónoma de Puebla, Av. San Claudio y Av. 24 Sur, Col. San Manuel Ciudad Universitaria, Puebla 72570, Mexico
| | - Yovani Aguilar Carrillo
- Centro de Investigaciones en Ciencias Microbiológicas, Instituto de Ciencias, Benemérita Universidad Autónoma de Puebla, Av. San Claudio y Av. 24 Sur, Col. San Manuel Ciudad Universitaria, Puebla 72570, Mexico
| | - Mirian Becerril Ramírez
- Centro de Investigaciones en Ciencias Microbiológicas, Instituto de Ciencias, Benemérita Universidad Autónoma de Puebla, Av. San Claudio y Av. 24 Sur, Col. San Manuel Ciudad Universitaria, Puebla 72570, Mexico
| | - Luis Javier Martínez Morales
- Centro de Investigaciones en Ciencias Microbiológicas, Instituto de Ciencias, Benemérita Universidad Autónoma de Puebla, Av. San Claudio y Av. 24 Sur, Col. San Manuel Ciudad Universitaria, Puebla 72570, Mexico
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Shayesteh H, Laird DW, Hughes LJ, Nematollahi MA, Kakhki AM, Moheimani NR. Co-Producing Phycocyanin and Bioplastic in Arthrospira platensis Using Carbon-Rich Wastewater. BIOTECH 2023; 12:49. [PMID: 37489483 PMCID: PMC10366904 DOI: 10.3390/biotech12030049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 06/02/2023] [Accepted: 06/08/2023] [Indexed: 07/26/2023] Open
Abstract
Microalgae can treat waste streams containing elevated levels of organic carbon and nitrogen. This process can be economically attractive if high value products are created simultaneously from the relatively low-cost waste stream. Co-production of two high value microalgal products, phycocyanin and polyhydroxybutyrate (PHB), was investigated using non-axenic Arthrospira platensis MUR126 and supplemental organic carbon (acetate, oxalate, glycerol and combinations). All supplemented cultures had higher biomass yield (g/L) than photoautotrophic control. All cultures produced PHB (3.6-7.8% w/w), except the control and those fed oxalate. Supplemented cultures showed a two to three-fold increase in phycocyanin content over the eight-day cultivation. Results indicate co-production of phycocyanin and PHB is possible in A. platensis, using mixed-waste organic carbon. However, supplementation resulted in growth of extremophile bacteria, particularly in cultures fed glycerol, and this had a negative impact on culture health. Refinement of the carbon dosing rate is required to minimise impacts of native bacterial contamination.
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Affiliation(s)
- Hajar Shayesteh
- Centre for Water, Energy and Waste, Harry Butler Institute, Murdoch University, Murdoch 6150, Australia
- Department of Biotechnology and Plant Breeding, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad 91779-48978, Iran
| | - Damian W Laird
- Centre for Water, Energy and Waste, Harry Butler Institute, Murdoch University, Murdoch 6150, Australia
| | - Leonie J Hughes
- School of Mathematics, Statistics, Chemistry and Physics, College of Science, Technology, Engineering, and Mathematics, Murdoch University, Murdoch 6150, Australia
| | - Mohammad A Nematollahi
- Department of Fisheries, Faculty of Natural Resources, University of Tehran, Karaj Campus, Tehran 77871-31587, Iran
| | - Amin Mirshamsi Kakhki
- Department of Biotechnology and Plant Breeding, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad 91779-48978, Iran
| | - Navid R Moheimani
- Centre for Water, Energy and Waste, Harry Butler Institute, Murdoch University, Murdoch 6150, Australia
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Žiganova M, Merijs-Meri R, Zicāns J, Bochkov I, Ivanova T, Vīgants A, Ence E, Štrausa E. Visco-Elastic and Thermal Properties of Microbiologically Synthesized Polyhydroxyalkanoate Plasticized with Triethyl Citrate. Polymers (Basel) 2023; 15:2896. [PMID: 37447541 DOI: 10.3390/polym15132896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Revised: 06/26/2023] [Accepted: 06/27/2023] [Indexed: 07/15/2023] Open
Abstract
The current research is devoted to the investigation of the plasticization of polyhydroxybutyrate (PHB) and polyhydroxybutyrate-co-hydroxyvalerate (PHBV) with triethyl citrate (TEC). Three different PHB or PHBV-based systems with 10, 20, and 30 wt.% of TEC were prepared by two-roll milling. The effect of TEC on the rheological, thermal, mechanical, and calorimetric properties of the developed compression-molded PHB and PHBV-based systems was determined. It was revealed that the addition of TEC significantly influenced the melting behavior of both polyhydroxyalkanoates (PHA), reducing their melting temperatures and decreasing viscosities. It was also revealed that all the investigated systems demonstrated less than 2% weight loss until 200 °C and rapid degradation did not occur until 240-260 °C in an oxidative environment. Apart from this, a remarkable increase (ca 2.5 times) in ultimate tensile deformation εB was observed by increasing the amount of TEC in either PHB or PHBV. A concomitant, considerable drop in ultimate strength σB and modulus of elasticity E was observed. Comparatively, the plasticization efficiency of TEC was greater in the case of PHBV.
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Affiliation(s)
- Madara Žiganova
- Institute of Polymer Materials, Faculty of Materials Science and Applied Chemistry, Riga Technical University, 3 Paula Valdena Street, LV-1048 Riga, Latvia
| | - Remo Merijs-Meri
- Institute of Polymer Materials, Faculty of Materials Science and Applied Chemistry, Riga Technical University, 3 Paula Valdena Street, LV-1048 Riga, Latvia
| | - Jānis Zicāns
- Institute of Polymer Materials, Faculty of Materials Science and Applied Chemistry, Riga Technical University, 3 Paula Valdena Street, LV-1048 Riga, Latvia
| | - Ivan Bochkov
- Institute of Polymer Materials, Faculty of Materials Science and Applied Chemistry, Riga Technical University, 3 Paula Valdena Street, LV-1048 Riga, Latvia
| | - Tatjana Ivanova
- Institute of Polymer Materials, Faculty of Materials Science and Applied Chemistry, Riga Technical University, 3 Paula Valdena Street, LV-1048 Riga, Latvia
| | - Armands Vīgants
- Laboratory of Bioconversion of Carbohydrates, University of Latvia, 1 Jelgavas Street, LV-1050 Riga, Latvia
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46
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Kargupta W, Raj Kafle S, Lee Y, Kim BS. One-pot treatment of Saccharophagus degradans for polyhydroxyalkanoate production from brown seaweed. BIORESOURCE TECHNOLOGY 2023:129392. [PMID: 37364651 DOI: 10.1016/j.biortech.2023.129392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 06/23/2023] [Accepted: 06/23/2023] [Indexed: 06/28/2023]
Abstract
The conventional production of polyhydroxyalkanoate (PHA) from waste biomass requires a pretreatment step (acid or alkali) for reducing sugar extraction, followed by bacterial fermentation. This study aims to find a greener approach for PHA production from brown seaweed. Saccharophagus degradans can be a promising bacterium for simultaneous reducing sugar and PHA production, bypassing the need for a pretreatment step. Cell retention cultures of S. degradans in membrane bioreactor resulted in approximately 4- and 3-fold higher PHA concentrations than batch cultures using glucose and seaweed as carbon sources, respectively. X-ray diffraction, Fourier transform infrared spectroscopy, and nuclear magnetic resonance results revealed identical peaks for the resulting PHA and standard poly(3-hydroxybutyrate). The developed one step process using cell retention culture of S. degradans could be a beneficial process for scalable and sustainable PHA production.
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Affiliation(s)
- Wriju Kargupta
- Department of Chemical Engineering, Chungbuk National University, Cheongju, Chungbuk 28644, Korea
| | - Saroj Raj Kafle
- Department of Chemical Engineering, Chungbuk National University, Cheongju, Chungbuk 28644, Korea
| | - Youngmoon Lee
- Department of Chemical Engineering, Chungbuk National University, Cheongju, Chungbuk 28644, Korea
| | - Beom Soo Kim
- Department of Chemical Engineering, Chungbuk National University, Cheongju, Chungbuk 28644, Korea.
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47
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Jayakumar A, Radoor S, Siengchin S, Shin GH, Kim JT. Recent progress of bioplastics in their properties, standards, certifications and regulations: A review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 878:163156. [PMID: 37003328 DOI: 10.1016/j.scitotenv.2023.163156] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2023] [Revised: 03/20/2023] [Accepted: 03/26/2023] [Indexed: 05/13/2023]
Abstract
The environmental impact associated with fossil fuel-based polymers has paved the way to explore biopolymer-based plastics, their properties, and their applications. Bioplastics are polymeric materials that are greatly interesting due to their eco-friendlier and non-toxic nature. In recent years, exploring the different sources of bioplastics and their applications has become one of the active research areas. Biopolymer-based plastics have applications in food packaging, pharmaceuticals, electronics, agricultural, automotive and cosmetic sectors. Bioplastics are considered safe, but there are several economic and legal challenges to implementing them. Hence, this review aims to i) outline the terminology associated with bioplastics, its global market, major sources, types and properties of bioplastics, ii) discuss the major bioplastic waste management and recovery options, iii) provide the major standards and certifications regarding bioplastics, iv) explore the various country-wise regulations and restrictions associated with bioplastics, and v) enumerate the various challenges and limitations associated with bioplastics and future directions. Therefore, providing adequate knowledge about various bioplastics, their properties and regulatory aspects can be of great importance in the industrialization, commercialization and globalization of bioplastics to replace petroleum-based products.
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Affiliation(s)
- Aswathy Jayakumar
- Department of Food and Nutrition, Kyung Hee University, Seoul 02447, Republic of Korea; BioNanocomposite Research Center, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Sabarish Radoor
- Department of Polymer-Nano Science and Technology, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si 54896, Republic of Korea
| | - Suchart Siengchin
- Department of Materials and Production Engineering, The Sirindhorn International Thai-German Graduate School of Engineering (TGGS), King Mongkut's University of Technology North Bangkok, 1518 Wongsawang Road, Bangsue, Bangkok 10800, Thailand
| | - Gye Hwa Shin
- Department of Food and Nutrition, Kunsan National University, Gunsan 54150, Republic of Korea
| | - Jun Tae Kim
- Department of Food and Nutrition, Kyung Hee University, Seoul 02447, Republic of Korea; BioNanocomposite Research Center, Kyung Hee University, Seoul 02447, Republic of Korea.
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48
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Chorsi MT, Le TT, Lin F, Vinikoor T, Das R, Stevens JF, Mundrane C, Park J, Tran KT, Liu Y, Pfund J, Thompson R, He W, Jain M, Morales-Acosta MD, Bilal OR, Kazerounian K, Ilies H, Nguyen TD. Highly piezoelectric, biodegradable, and flexible amino acid nanofibers for medical applications. SCIENCE ADVANCES 2023; 9:eadg6075. [PMID: 37315129 PMCID: PMC10266740 DOI: 10.1126/sciadv.adg6075] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Accepted: 05/10/2023] [Indexed: 06/16/2023]
Abstract
Amino acid crystals are an attractive piezoelectric material as they have an ultrahigh piezoelectric coefficient and have an appealing safety profile for medical implant applications. Unfortunately, solvent-cast films made from glycine crystals are brittle, quickly dissolve in body fluid, and lack crystal orientation control, reducing the overall piezoelectric effect. Here, we present a material processing strategy to create biodegradable, flexible, and piezoelectric nanofibers of glycine crystals embedded inside polycaprolactone (PCL). The glycine-PCL nanofiber film exhibits stable piezoelectric performance with a high ultrasound output of 334 kPa [under 0.15 voltage root-mean-square (Vrms)], which outperforms the state-of-the-art biodegradable transducers. We use this material to fabricate a biodegradable ultrasound transducer for facilitating the delivery of chemotherapeutic drug to the brain. The device remarkably enhances the animal survival time (twofold) in mice-bearing orthotopic glioblastoma models. The piezoelectric glycine-PCL presented here could offer an excellent platform not only for glioblastoma therapy but also for developing medical implantation fields.
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Affiliation(s)
- Meysam T. Chorsi
- Department of Mechanical Engineering, University of Connecticut, Storrs, CT 06269, USA
- Department of Biomedical Engineering, University of Connecticut, Storrs, CT 06269, USA
| | - Thinh T. Le
- Department of Mechanical Engineering, University of Connecticut, Storrs, CT 06269, USA
| | - Feng Lin
- Department of Mechanical Engineering, University of Connecticut, Storrs, CT 06269, USA
| | - Tra Vinikoor
- Department of Biomedical Engineering, University of Connecticut, Storrs, CT 06269, USA
| | - Ritopa Das
- Department of Biomedical Engineering, University of Connecticut, Storrs, CT 06269, USA
| | - James F. Stevens
- Department of Mechanical Engineering, University of Connecticut, Storrs, CT 06269, USA
| | - Caitlyn Mundrane
- Department of Biomedical Engineering, University of Connecticut, Storrs, CT 06269, USA
| | - Jinyoung Park
- Department of Biomedical Engineering, University of Connecticut, Storrs, CT 06269, USA
| | - Khanh T. M. Tran
- Department of Biomedical Engineering, University of Connecticut, Storrs, CT 06269, USA
| | - Yang Liu
- Department of Mechanical Engineering, University of Connecticut, Storrs, CT 06269, USA
| | - Jacob Pfund
- Department of Physics, University of Connecticut, Storrs, CT 06269, USA
| | - Rachel Thompson
- Department of Biomedical Engineering, University of Connecticut, Storrs, CT 06269, USA
| | - Wu He
- Flow Cytometry Facility, Center for Open Research Resources and Equipment, University of Connecticut, Storrs, CT 06269, USA
| | - Menka Jain
- Department of Physics, University of Connecticut, Storrs, CT 06269, USA
- Institute of Materials Science, University of Connecticut, Storrs, CT 06269, USA
| | | | - Osama R. Bilal
- Department of Mechanical Engineering, University of Connecticut, Storrs, CT 06269, USA
| | - Kazem Kazerounian
- Department of Mechanical Engineering, University of Connecticut, Storrs, CT 06269, USA
- Department of Biomedical Engineering, University of Connecticut, Storrs, CT 06269, USA
| | - Horea Ilies
- Department of Mechanical Engineering, University of Connecticut, Storrs, CT 06269, USA
| | - Thanh D. Nguyen
- Department of Mechanical Engineering, University of Connecticut, Storrs, CT 06269, USA
- Department of Biomedical Engineering, University of Connecticut, Storrs, CT 06269, USA
- Institute of Materials Science, University of Connecticut, Storrs, CT 06269, USA
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49
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Frank C, Emmerstorfer-Augustin A, Rath T, Trimmel G, Nachtnebel M, Stelzer F. Bio-Polyester/Rubber Compounds: Fabrication, Characterization, and Biodegradation. Polymers (Basel) 2023; 15:2593. [PMID: 37376240 DOI: 10.3390/polym15122593] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Revised: 05/23/2023] [Accepted: 05/26/2023] [Indexed: 06/29/2023] Open
Abstract
Biobased and biodegradable polymers (BBDs) such as poly(3-hydroxy-butyrate), PHB, and poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) are considered attractive alternatives to fossil-based plastic materials since they are more environmentally friendly. One major problem with these compounds is their high crystallinity and brittleness. In order to generate softer materials without using fossil-based plasticizers, the suitability of natural rubber (NR) as an impact modifier was investigated in PHBV blends. Mixtures with varying proportions of NR and PHBV were generated, and samples were prepared by mechanical mixing (roll mixer and/or internal mixer) and cured by radical C-C crosslinking. The obtained specimens were investigated with respect to their chemical and physical characteristics, applying a variety of different methods such as size exclusion chromatography, Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), thermal analysis, XRD, and mechanical testing. Our results clearly indicate that NR-PHBV blends exhibit excellent material characteristics including high elasticity and durability. Additionally, biodegradability was tested by applying heterologously produced and purified depolymerases. pH shift assays and morphology analyses of the surface of depolymerase-treated NR-PHBV through electron scanning microscopy confirmed the enzymatic degradation of PHBV. Altogether, we prove that NR is highly suitable to substitute fossil-based plasticizers; NR-PHBV blends are biodegradable and, hence, should be considered as interesting materials for a great number of applications.
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Affiliation(s)
- Carina Frank
- Acib-GmbH, Krenngasse 32, A-8010 Graz, Austria
- Institute for Chemistry and Technology of Materials, Graz University of Technology, Stremayrgasse 9, A-8010 Graz, Austria
| | - Anita Emmerstorfer-Augustin
- Acib-GmbH, Krenngasse 32, A-8010 Graz, Austria
- Institute for Molecular Biotechnology, Graz University of Technology, NAWI Graz, BioTechMed-Graz, Petersgasse 14, A-8010 Graz, Austria
| | - Thomas Rath
- Institute for Chemistry and Technology of Materials, Graz University of Technology, Stremayrgasse 9, A-8010 Graz, Austria
| | - Gregor Trimmel
- Institute for Chemistry and Technology of Materials, Graz University of Technology, Stremayrgasse 9, A-8010 Graz, Austria
| | - Manfred Nachtnebel
- Graz Centre for Electron Microscopy, Steyrergasse 17, A-8010 Graz, Austria
| | - Franz Stelzer
- Acib-GmbH, Krenngasse 32, A-8010 Graz, Austria
- Institute for Chemistry and Technology of Materials, Graz University of Technology, Stremayrgasse 9, A-8010 Graz, Austria
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50
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Penchev H, Abdelhamid AE, Ali EA, Budurova D, Grancharov G, Ublekov F, Koseva N, Zaharieva K, El-Sayed AA, Khalil AM. Novel Electrospun Composite Membranes Based on Polyhydroxybutyrate and Poly(vinyl formate) Loaded with Protonated Montmorillonite for Organic Dye Removal: Kinetic and Isotherm Studies. MEMBRANES 2023; 13:582. [PMID: 37367786 DOI: 10.3390/membranes13060582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 05/28/2023] [Accepted: 05/31/2023] [Indexed: 06/28/2023]
Abstract
The use of biodegradable polyesters derived from green sources and their combination with natural abundantly layered aluminosilicate clay, e.g., natural montmorillonite, meets the requirements for the development of new sustainable, disposable, and biodegradable organic dye sorbent materials. In this regard, novel electrospun composite fibers, based on poly β-hydroxybutyrate (PHB) and in situ synthesized poly(vinyl formate) (PVF), loaded with protonated montmorillonite (MMT-H) were prepared via electrospinning in the presence of formic acid, a volatile solvent for polymers and a protonating agent for the pristine MMT-Na. The morphology and structure of electrospun composite fibers were investigated through SEM, TEM, AFM, FT-IR, and XRD analyses. The contact angle (CA) measurements showed increased hydrophilicity of the composite fibers incorporated with MMT-H. The electrospun fibrous mats were evaluated as membranes for removing cationic (methylene blue) and anionic (Congo red) dyes. PHB/MMT 20% and PVF/MMT 30% showed significant performance in dye removal compared with the other matrices. PHB/MMT 20% was the best electrospun mat for adsorbing Congo red. The PVF/MMT 30% fibrous membrane exhibited the optimum activity for the adsorption of methylene blue and Congo red dyes.
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Affiliation(s)
- Hristo Penchev
- Institute of Polymers, Bulgarian Academy of Sciences, Acad. G. Bonchev 103A, 1113 Sofia, Bulgaria
| | - Ahmed E Abdelhamid
- Polymers and Pigments Department, National Research Centre, El-Buhouth Str., Giza 12622, Egypt
| | - Eman A Ali
- Polymers and Pigments Department, National Research Centre, El-Buhouth Str., Giza 12622, Egypt
| | - Dessislava Budurova
- Institute of Polymers, Bulgarian Academy of Sciences, Acad. G. Bonchev 103A, 1113 Sofia, Bulgaria
| | - Georgy Grancharov
- Institute of Polymers, Bulgarian Academy of Sciences, Acad. G. Bonchev 103A, 1113 Sofia, Bulgaria
| | - Filip Ublekov
- Institute of Polymers, Bulgarian Academy of Sciences, Acad. G. Bonchev 103A, 1113 Sofia, Bulgaria
| | - Neli Koseva
- Institute of Polymers, Bulgarian Academy of Sciences, Acad. G. Bonchev 103A, 1113 Sofia, Bulgaria
| | - Katerina Zaharieva
- Institute of Mineralogy and Crystallography Acad. I. Kostov, Bulgarian Academy of Sciences, Acad. G. Bonchev 107, 1113 Sofia, Bulgaria
| | - Ahmed A El-Sayed
- Photochemistry Department, National Research Centre, El-Buhouth Str., Giza 12622, Egypt
| | - Ahmed M Khalil
- Photochemistry Department, National Research Centre, El-Buhouth Str., Giza 12622, Egypt
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