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Li Z, Wang J, Yue H, Rehman A, Yousaf M, Du M, Zhang X. Applying metabolic modeling and multi-omics to elucidate the biotransformation mechanisms of marine algal toxin domoic acid (DA) in sediments. JOURNAL OF HAZARDOUS MATERIALS 2024; 472:134541. [PMID: 38714055 DOI: 10.1016/j.jhazmat.2024.134541] [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: 07/25/2023] [Revised: 03/30/2024] [Accepted: 05/03/2024] [Indexed: 05/09/2024]
Abstract
Domoic acid (DA)-producing algal blooms are a global marine environmental issue. However, there has been no previous research addressing the question regarding the fate of DA in marine benthic environments. In this work, we investigated the DA fate in the water-sediment microcosm via the integrative analysis of a top-down metabolic model, metagenome, and metabolome. Results demonstrated that biodegradation is the leading mechanism for the nonconservative attenuation of DA. Specifically, DA degradation was prominently completed by the sediment aerobic community, with a degradation rate of 0.0681 ± 0.00954 d-1. The DA degradation pathway included hydration, dehydrogenation, hydrolysis, decarboxylation, automatic ring opening of hydration, and β oxidation reactions. Moreover, the reverse ecological analysis demonstrated that the microbial community transitioned from nutrient competition to metabolic cross-feeding during DA degradation, further enhancing the cooperation between DA degraders and other taxa. Finally, we reconstructed the metabolic process of microbial communities during DA degradation and confirmed that the metabolism of amino acid and organic acid drove the degradation of DA. Overall, our work not only elucidated the fate of DA in marine environments but also provided crucial insights for applying metabolic models and multi-omics to investigate the biotransformation of other contaminants.
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Affiliation(s)
- Zelong Li
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, PR China
| | - Jing Wang
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, PR China.
| | - Hao Yue
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, PR China
| | - Arbaz Rehman
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, PR China
| | - Mariam Yousaf
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, PR China
| | - Miaomiao Du
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, PR China
| | - Xiuhong Zhang
- School of Chemistry, Dalian University of Technology, Dalian 116024, PR China.
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2
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von Haugwitz G, Donnelly K, Di Filippo M, Breite D, Phippard M, Schulze A, Wei R, Baumann M, Bornscheuer UT. Synthesis of Modified Poly(vinyl Alcohol)s and Their Degradation Using an Enzymatic Cascade. Angew Chem Int Ed Engl 2023; 62:e202216962. [PMID: 36637456 DOI: 10.1002/anie.202216962] [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: 11/17/2022] [Revised: 01/10/2023] [Accepted: 01/11/2023] [Indexed: 01/14/2023]
Abstract
Poly(vinyl alcohol) (PVA) is a water-soluble synthetic vinyl polymer with remarkable physical properties including thermostability and viscosity. Its biodegradability, however, is low even though a large amount of PVA is released into the environment. Established physical-chemical degradation methods for PVA have several disadvantages such as high price, low efficiency, and secondary pollution. Biodegradation of PVA by microorganisms is slow and frequently involves pyrroloquinoline quinone (PQQ)-dependent enzymes, making it expensive due to the costly cofactor and hence unattractive for industrial applications. In this study, we present a modified PVA film with improved properties as well as a PQQ-independent novel enzymatic cascade for the degradation of modified and unmodified PVA. The cascade consists of four steps catalyzed by three enzymes with in situ cofactor recycling technology making this cascade suitable for industrial applications.
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Affiliation(s)
- Gerlis von Haugwitz
- Institute of Biochemistry, Dept. of Biotechnology & Enzyme Catalysis, Greifswald University, Felix-Hausdorff-Str. 4, 17487, Greifswald, Germany
| | - Kian Donnelly
- School of Chemistry, Science Centre South, University College Dublin, Belfield, Dublin 4, Ireland
| | - Mara Di Filippo
- School of Chemistry, Science Centre South, University College Dublin, Belfield, Dublin 4, Ireland
| | - Daniel Breite
- Surfaces of Porous Membrane Filters, Leibniz Institute of Surface Engineering (IOM), Permoserstraße 15, 04318, Leipzig, Germany
| | - Max Phippard
- Aquapak Polymers Ltd, Hollymoor Point, Hollymoor Way, Rubery, B31 5HE, Birmingham, UK
| | - Agnes Schulze
- Surfaces of Porous Membrane Filters, Leibniz Institute of Surface Engineering (IOM), Permoserstraße 15, 04318, Leipzig, Germany
| | - Ren Wei
- Institute of Biochemistry, Dept. of Biotechnology & Enzyme Catalysis, Greifswald University, Felix-Hausdorff-Str. 4, 17487, Greifswald, Germany
| | - Marcus Baumann
- School of Chemistry, Science Centre South, University College Dublin, Belfield, Dublin 4, Ireland
| | - Uwe T Bornscheuer
- Institute of Biochemistry, Dept. of Biotechnology & Enzyme Catalysis, Greifswald University, Felix-Hausdorff-Str. 4, 17487, Greifswald, Germany
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3
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Novel Bionanocomposites Based on Cinnamon Nanoemulsion and TiO2-NPs for Preserving Fresh Chicken Breast Fillets. FOOD BIOPROCESS TECH 2022. [DOI: 10.1007/s11947-022-02934-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
AbstractIn this study, bionanocomposite coating solutions were created using polyvinyl alcohol (PVA) and chitosan (Cs), with different concentrations of cinnamon essential oil in nanoemulsion (n-CEO; 0%, 5%, 10%, and 20%) and TiO2 nanoparticles (TiO2-NPs). The bionanocomposite was characterized using Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy with EDX, and mechanical and barrier property assessment. Additionally, antimicrobial and antioxidant properties and total phenols were evaluated. Generally, mechanical and barrier properties were enhanced with increasing n-CEO concentrations with a favorable distribution in film matrix. Moreover, total phenols, antioxidant, and antimicrobial activities were also enhanced a broader inhibition pattern against A. flavus, gram-positive, and gram-negative bacteria. The influence of n-CEO and TiO2-NPs blended into bionanocomposite on preservation of fresh chicken breast fillets during 21 days of refrigeration was evaluated. Added n-CEO concentration, especially 20%, and TiO2-NPs enhanced antimicrobial properties and extended preservation time up to 14 days compared to uncoated samples. Furthermore, weight loss was decreased during storage of coated samples. Thus, PVA/Cs/TiO2–NPs with n-CEO bionanocomposites may be useful as a coating for chicken breast fillets to control microbial growth and reduce weight loss during cold storage.
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4
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Bher A, Mayekar PC, Auras RA, Schvezov CE. Biodegradation of Biodegradable Polymers in Mesophilic Aerobic Environments. Int J Mol Sci 2022; 23:12165. [PMID: 36293023 PMCID: PMC9603655 DOI: 10.3390/ijms232012165] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 10/03/2022] [Accepted: 10/07/2022] [Indexed: 08/29/2023] Open
Abstract
Finding alternatives to diminish plastic pollution has become one of the main challenges of modern life. A few alternatives have gained potential for a shift toward a more circular and sustainable relationship with plastics. Biodegradable polymers derived from bio- and fossil-based sources have emerged as one feasible alternative to overcome inconveniences associated with the use and disposal of non-biodegradable polymers. The biodegradation process depends on the environment's factors, microorganisms and associated enzymes, and the polymer properties, resulting in a plethora of parameters that create a complex process whereby biodegradation times and rates can vary immensely. This review aims to provide a background and a comprehensive, systematic, and critical overview of this complex process with a special focus on the mesophilic range. Activity toward depolymerization by extracellular enzymes, biofilm effect on the dynamic of the degradation process, CO2 evolution evaluating the extent of biodegradation, and metabolic pathways are discussed. Remarks and perspectives for potential future research are provided with a focus on the current knowledge gaps if the goal is to minimize the persistence of plastics across environments. Innovative approaches such as the addition of specific compounds to trigger depolymerization under particular conditions, biostimulation, bioaugmentation, and the addition of natural and/or modified enzymes are state-of-the-art methods that need faster development. Furthermore, methods must be connected to standards and techniques that fully track the biodegradation process. More transdisciplinary research within areas of polymer chemistry/processing and microbiology/biochemistry is needed.
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Affiliation(s)
- Anibal Bher
- School of Packaging, Michigan State University, East Lansing, MI 48824, USA
- Instituto de Materiales de Misiones, CONICET-UNaM, Posadas 3300, Misiones, Argentina
| | - Pooja C. Mayekar
- School of Packaging, Michigan State University, East Lansing, MI 48824, USA
| | - Rafael A. Auras
- School of Packaging, Michigan State University, East Lansing, MI 48824, USA
| | - Carlos E. Schvezov
- Instituto de Materiales de Misiones, CONICET-UNaM, Posadas 3300, Misiones, Argentina
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Modifying Anti-Compression Property and Water-Soluble Ability of Polyglycolic Acid via Melt Blending with Polyvinyl Alcohol. Polymers (Basel) 2022; 14:polym14163375. [PMID: 36015633 PMCID: PMC9415373 DOI: 10.3390/polym14163375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 08/04/2022] [Accepted: 08/16/2022] [Indexed: 11/17/2022] Open
Abstract
Biodegradable polymeric materials have become the most attractive research interest in recent years and are gradually widely used in various fields in the case of environmental pollution. In this paper, binary blends, mainly including varying contents of polyglycolic acid (PGA) and poly(vinyl alcohol) (PVA), were prepared via a melt compounding strategy. The ethylene-methyl acrylate-glycidyl methacrylate (EMA-GMA) was employed as the compatibilizer to improve the compatibility between the PGA and PVA and the polyolefin elastomer (POE) was used as toughening agent. The anti-compression property and water-soluble ability of the blends were particularly studied to explore their potential application in an oil/gas exploitation field. Special attentions were paid to the evolution of the water-soluble ability of PGAX with the PVA concentration. Furthermore, isothermal shear measurement and thermogravimetric analysis were performed to evaluate the thermal stability of PGA and PGA blends (PGAX) during melt processing. The results showed that the incompatibility between PGA and PVA largely deteriorated the mechanical property, i.e., anti-compression strength, leading to fragile characteristics under a lower compressive load for the PGAX samples with varied contents of PVA. The presence of PVA and EMA-GMA greatly enhanced the viscoelasticity of the PGA melt, showing an increased storage modulus and viscosity at a low shear frequency; however, the thermal instability of PGAX was intensified owing to the greater ease of thermal degradation of PVA than that of PGA. Meanwhile, the water-soluble ability of PGAX was improved due to the high water dissolution of PVA, which played the role as a sacrificial material. The purpose of this work is to pursue an effective modification for PGA processing and application via melt blending.
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A novel esterase DacA pva from Comamonas sp. strain NyZ500 with deacetylation activity for acetylated polymer polyvinyl alcohol. Appl Environ Microbiol 2021; 87:AEM.03016-20. [PMID: 33547060 PMCID: PMC8091124 DOI: 10.1128/aem.03016-20] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
As a water-soluble polymer, the widely used polyvinyl alcohol (PVA) is produced from hydrolysis of polyvinyl acetate. Microbial PVA carbon backbone cleavage via a two-step reaction of dehydrogenation and hydrolysis has been well studied. Content of acetyl group is a pivotal factor affecting performance of PVA derivatives in industrial application, and deacetylation is a non-negligible part in PVA degradation. However, the genetic and biochemical studies of its deacetylation remain largely elusive. Here, Comamonas sp. strain NyZ500 was isolated for its capability of growing on acetylated PVA from activated sludge. A spontaneous PVA-utilization deficient mutant strain NyZ501 was obtained when strain NyZ500 was cultured in rich media. Comparative analysis between the genomes of these two strains revealed a fragment (containing a putative hydrolase gene dacApva ) deletion in NyZ501 and dacApva-complemented strain NyZ501 restored the ability to grow on PVA. DacApva, which shares 21% identity with xylan esterase AxeA1 from Prevotella ruminicola 23, is a unique deacetylase catalyzing the conversion of acetylated PVA and its derivatives to deacetylated counterparts. This indicates that strain NyZ500 utilizes acetylated PVA via acetate as a carbon source to grow. DacApva also possessed the deacetylation ability for acetylated xylan and the antibiotic intermediate 7-aminocephalosporanic acid (7ACA) but the enzymes for the above two compounds had no activities against PVA derivatives. This study enhanced our understanding of the diversity of microbial degradation of PVA and DacApva characterized here is also a potential biocatalyst for the eco-friendly biotransformation of PVA derivatives and other acetylated compounds.IMPORTANCE: Water-soluble PVA, which possesses a very robust ability to accumulate in the environment, has a very grave environmental impact due to its widespread use in industrial and household applications. On the other hand, chemical transformation of PVA derivatives is currently being carried out at high energy consumption and high pollution conditions using hazardous chemicals (such as NaOH, methanol) under high temperatures. The DacApva reported here performs PVA deacetylation under mild conditions, then it has a great potential to be developed into an eco-friendly biocatalyst for biotransformation of PVA derivatives. DacApva also has deacetylation activity for compounds other than PVA derivatives, which facilitates its development into a broad-spectrum deacetylation biocatalyst for production of certain desired compounds.
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Al Rohily K, El-Hamshary H, Ghoneim A, Modaihsh A. Controlled Release of Phosphorus from Superabsorbent Phosphate-Bound Alginate- Graft-Polyacrylamide: Resistance to Soil Cations and Release Mechanism. ACS OMEGA 2020; 5:32919-32929. [PMID: 33403253 PMCID: PMC7774079 DOI: 10.1021/acsomega.0c03740] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Accepted: 11/10/2020] [Indexed: 05/13/2023]
Abstract
Two controlled-released fertilizers of phosphorylated alginate grafted with polyacrylamide (P-Alg-g-PAM) were synthesized. Monoammonium phosphate (MAP) and diammonium phosphate (DAP) were reacted with a matrix of sodium alginate (Alg) and poly(vinyl alcohol) (PVA). The phosphorylated matrix was then grafted with acrylamide. The obtained fertilizer materials showed excellent water absorbance. The controlled-release behavior of phosphorylated alginate grafted with polyacrylamide (P-Alg-g-PAM) was investigated at normal pH and 25 °C. The fertilizer materials exhibited release of phosphorus up to 77% for the MAP sample and up to 57% for the DAP sample till the forty fifth day of the application at pH 7 and 25 °C. More importantly, when the release experiments were conducted in calcium chloride medium, the fertilizers were able to release phosphorus efficiently with slight decrease until the forty fifth day of the application, suggesting that the presence of Alg in the fertilizer formulation may help in extending the duration for which phosphorus is available to the plant.
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Affiliation(s)
- Khalid Al Rohily
- Department
of Soil Science, College of Food and Agricultural Sciences, King Saud University, P.O. Box-2460, Riyadh 11451, Saudi Arabia
| | - Hany El-Hamshary
- Chemistry
Department, College of Science, King Saud
University, Riyadh 11451, Saudi Arabia
- Department
of Chemistry, Faculty of Science, Tanta
University, Tanta 31527, Egypt
| | - Adel Ghoneim
- Department
of Soil Science, College of Food and Agricultural Sciences, King Saud University, P.O. Box-2460, Riyadh 11451, Saudi Arabia
- Field
Crops Research Institute, Agricultural Research
Center, Giza 12619, Egypt
| | - Abdullah Modaihsh
- Department
of Soil Science, College of Food and Agricultural Sciences, King Saud University, P.O. Box-2460, Riyadh 11451, Saudi Arabia
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8
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Huang CL, Lee KM, Liu ZX, Lai RY, Chen CK, Chen WC, Hsu JF. Antimicrobial Activity of Electrospun Polyvinyl Alcohol Nanofibers Filled with Poly[2-(tert-butylaminoethyl) Methacrylate]-Grafted Graphene Oxide Nanosheets. Polymers (Basel) 2020; 12:E1449. [PMID: 32605222 PMCID: PMC7408366 DOI: 10.3390/polym12071449] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2020] [Revised: 06/24/2020] [Accepted: 06/25/2020] [Indexed: 01/04/2023] Open
Abstract
A novel cationic polymer, poly[2-(tert-butylaminoethyl) methacrylate] (PTA), effectively kills various strains of bacteria with low toxicity to tissue cells. Graphene-based materials demonstrate exceptional electron transport capability, antibacterial activity, favorable nontoxicity, and versatile applicability. PTA can be grafted onto the graphene oxide (GO) surface (GO-g-PTA) to enhance the antimicrobial efficiency of the latter against Staphylococcus aureus (S. aureus). In this study, GO-g-PTA powders were successfully synthesized via free radical polymerization (GO-g-PTA-F) and atom transfer radical polymerization (GO-g-PTA-A). The antimicrobial efficiencies of graphene nanosheets (GNSs), GO-g-PTA-F, and GO-g-PTA-A were then investigated. Addition of GNS, GO-g-PTA-F, and GO-g-PTA-A to the PVA nanofibers was carried out elucidate the effects of filler amount and physical treatment on the morphology, microstructure, crystallization behaviors, antimicrobial efficiency, and cytotoxicity of the composite fibers. Finally, the potential applications of electrospun PVA/GNS, PVA/GO-g-PTA-F, and PVA/GO-g-PTA-A composite nanofiber mats to chronic wound care were evaluated. The resulting PVA/GO-g-PTA-A composite nanofiber mats showed enhanced antimicrobial ability against S. aureus compared with the PVA/GNS and PVA/GO-g-PTA-F composite nanofiber mats at the same filler volume percentage.
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Affiliation(s)
- Chien-Lin Huang
- Department of Fiber and Composite Materials, Feng Chia University, Taichung 40724, Taiwan; (Z.-X.L.); (R.-Y.L.); (W.-C.C.)
| | - Kun-Mu Lee
- Department of Chemical and Materials Engineering, Chang Gung University, Taoyuan 33302, Taiwan;
- Department of Pediatrics, Chang Gung Memorial Hospital, Linkou, Taoyuan 33305, Taiwan
| | - Zheng-Xian Liu
- Department of Fiber and Composite Materials, Feng Chia University, Taichung 40724, Taiwan; (Z.-X.L.); (R.-Y.L.); (W.-C.C.)
| | - Ruo-Yu Lai
- Department of Fiber and Composite Materials, Feng Chia University, Taichung 40724, Taiwan; (Z.-X.L.); (R.-Y.L.); (W.-C.C.)
| | - Chih-Kuang Chen
- Department of Materials and Optoelectronic Science, National Sun Yat-sen University, Kaohsiung 80424, Taiwan;
| | - Wen-Cheng Chen
- Department of Fiber and Composite Materials, Feng Chia University, Taichung 40724, Taiwan; (Z.-X.L.); (R.-Y.L.); (W.-C.C.)
| | - Jen-Fu Hsu
- Department of Pediatrics, Chang Gung Memorial Hospital, Linkou, Taoyuan 33305, Taiwan
- School of Medicine, College of Medicine, Chang Gung University, Taoyuan 33302, Taiwan
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Characterization and enhancement of the electrical performance of radiation modified poly (vinyl) alcohol/gelatin copolymer films doped with carotene. JOURNAL OF RADIATION RESEARCH AND APPLIED SCIENCES 2019. [DOI: 10.1016/j.jrras.2014.04.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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10
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Designing kaolin-reinforced bionanocomposites of poly(vinyl alcohol)/gelatin and study of their mechanical and water vapor transmission behavior. Polym Bull (Berl) 2019. [DOI: 10.1007/s00289-019-02684-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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11
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Bátori V, Åkesson D, Zamani A, Taherzadeh MJ, Sárvári Horváth I. Anaerobic degradation of bioplastics: A review. WASTE MANAGEMENT (NEW YORK, N.Y.) 2018; 80:406-413. [PMID: 30455023 DOI: 10.1016/j.wasman.2018.09.040] [Citation(s) in RCA: 92] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Revised: 09/19/2018] [Accepted: 09/24/2018] [Indexed: 06/09/2023]
Abstract
Anaerobic digestion (AD) of the organic fraction of municipal solid waste (OFMSW), leading to renewable energy production in the form of methane, is a preferable method for dealing with the increasing amount of waste. Food waste is separated at the source in many countries for anaerobic digestion. However, the presence of plastic bags is a major challenge for such processes. This study investigated the anaerobic degradability of different bioplastics, aiming at potential use as collecting bags for the OFMSW. The chemical composition of the bioplastics and the microbial community structure in the AD process affected the biodegradation of the bioplastics. Some biopolymers can be degraded at hydraulic retention times usually applied at the biogas plants, such as poly(hydroxyalkanoate)s, starch, cellulose and pectin, so no possible contamination would occur. In the future, updated standardization of collecting bags for the OFMSW will be required to meet the requirements of effective operation of a biogas plant.
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Affiliation(s)
- Veronika Bátori
- Swedish Centre for Resource Recovery, University of Borås, 50190 Borås, Sweden.
| | - Dan Åkesson
- Swedish Centre for Resource Recovery, University of Borås, 50190 Borås, Sweden
| | - Akram Zamani
- Swedish Centre for Resource Recovery, University of Borås, 50190 Borås, Sweden
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Wang Z, Qiao X, Sun K. Rice straw cellulose nanofibrils reinforced poly(vinyl alcohol) composite films. Carbohydr Polym 2018; 197:442-450. [DOI: 10.1016/j.carbpol.2018.06.025] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Revised: 05/19/2018] [Accepted: 06/05/2018] [Indexed: 10/14/2022]
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13
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Affiliation(s)
- Mirela Teodorescu
- Laboratory of Electroactive Polymers and Plasmochemistry, “Petru Poni” Institute of Macromolecular Chemistry, 41-A Grigore Ghica Voda Alley, Iasi, Romania
| | - Maria Bercea
- Laboratory of Electroactive Polymers and Plasmochemistry, “Petru Poni” Institute of Macromolecular Chemistry, 41-A Grigore Ghica Voda Alley, Iasi, Romania
| | - Simona Morariu
- Laboratory of Electroactive Polymers and Plasmochemistry, “Petru Poni” Institute of Macromolecular Chemistry, 41-A Grigore Ghica Voda Alley, Iasi, Romania
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Bioinformatics Analysis and Characterization of Highly Efficient Polyvinyl Alcohol (PVA)-Degrading Enzymes from the Novel PVA Degrader Stenotrophomonas rhizophila QL-P4. Appl Environ Microbiol 2017; 84:AEM.01898-17. [PMID: 29079625 DOI: 10.1128/aem.01898-17] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Accepted: 10/23/2017] [Indexed: 01/24/2023] Open
Abstract
Polyvinyl alcohol (PVA) is used widely in industry, and associated environmental pollution is a serious problem. Herein, we report a novel, efficient PVA degrader, Stenotrophomonas rhizophila QL-P4, isolated from fallen leaves from a virgin forest in the Qinling Mountains. The complete genome was obtained using single-molecule real-time (SMRT) technology and corrected using Illumina sequencing. Bioinformatics analysis revealed eight PVA/vinyl alcohol oligomer (OVA)-degrading genes. Of these, seven genes were predicted to be involved in the classic intracellular PVA/OVA degradation pathway, and one (BAY15_3292) was identified as a novel PVA oxidase. Five PVA/OVA-degrading enzymes were purified and characterized. One of these, BAY15_1712, a PVA dehydrogenase (PVADH), displayed high catalytic efficiency toward PVA and OVA substrate. All reported PVADHs only have PVA-degrading ability. Most importantly, we discovered a novel PVA oxidase (BAY15_3292) that exhibited higher PVA-degrading efficiency than the reported PVADHs. Further investigation indicated that BAY15_3292 plays a crucial role in PVA degradation in S. rhizophila QL-P4. Knocking out BAY15_3292 resulted in a significant decline in PVA-degrading activity in S. rhizophila QL-P4. Interestingly, we found that BAY15_3292 possesses exocrine activity, which distinguishes it from classic PVADHs. Transparent circle experiments further proved that BAY15_3292 greatly affects extracellular PVA degradation in S. rhizophila QL-P4. The exocrine characteristics of BAY15_3292 facilitate its potential application to PVA bioremediation. In addition, we report three new efficient secondary alcohol dehydrogenases (SADHs) with OVA-degrading ability in S. rhizophila QL-P4; in contrast, only one OVA-degrading SADH was reported previously.IMPORTANCE With the widespread application of PVA in industry, PVA-related environmental pollution is an increasingly serious issue. Because PVA is difficult to degrade, it accumulates in aquatic environments and causes chronic toxicity to aquatic organisms. Biodegradation of PVA, as an economical and environment-friendly method, has attracted much interest. To date, effective and applicable PVA-degrading bacteria/enzymes have not been reported. Herein, we report a new efficient PVA degrader (S. rhizophila QL-P4) that has five PVA/OVA-degrading enzymes with high catalytic efficiency, among which BAY15_1712 is the only reported PVADH with both PVA- and OVA-degrading abilities. Importantly, we discovered a novel PVA oxidase (BAY15_3292) that is not only more efficient than other reported PVA-degrading PVADHs but also has exocrine activity. Overall, our findings provide new insight into PVA-degrading pathways in microorganisms and suggest S. rhizophila QL-P4 and its enzymes have the potential for application to PVA bioremediation to reduce or eliminate PVA-related environmental pollution.
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15
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Mechanically tuned nanocomposite coating on titanium metal with integrated properties of biofilm inhibition, cell proliferation, and sustained drug delivery. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2016; 13:23-35. [PMID: 27558354 DOI: 10.1016/j.nano.2016.08.010] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Revised: 06/29/2016] [Accepted: 08/04/2016] [Indexed: 11/20/2022]
Abstract
The clinical success of coated implants in executing biological functions inclusive of sustainable drug release and long term antibacterial activity without antibiotics is critical. To this aim, a nanohybrid of silver nanoparticles (AgNPs) cored in polyvinyl alcohol nanocapsules (Ag-PVA NCs) embedded in chitosan (CS) matrix loaded with anti-inflammatory drug naproxen was prepared. The synthesized nanohybrids that were subjected to coatings on (3-aminopropyl)triethoxysilane (APTES) treated titanium (Ti) metal exhibited dual role of excellent inhibition on biofilm formation and sustained drug release. These dual characteristics are achieved mainly based on intrinsic antibacterial property of AgNPs and differential entrapment of drug in PVA polymeric shell of AgNPs and CS matrix. The coatings also demonstrated enhanced mechanical properties with increasing inorganic filler and stress shielding on Ti metal. The biocompatibility tests involving adhesion, proliferation and differentiation of osteoblast cells demonstrated the efficacy of Ag-PVA NCs embedded in CS matrix as a suitable coating material for orthopedic applications.
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16
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Korbag I, Mohamed Saleh S. Studies on the formation of intermolecular interactions and structural characterization of polyvinyl alcohol/lignin film. ACTA ACUST UNITED AC 2016. [DOI: 10.1080/00207233.2016.1143700] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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17
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Ben Halima N. Poly(vinyl alcohol): review of its promising applications and insights into biodegradation. RSC Adv 2016. [DOI: 10.1039/c6ra05742j] [Citation(s) in RCA: 160] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Poly(vinyl alcohol) is a promising class of synthetic polymer biodegradable under a two-step metabolism consisting of an oxidation and hydrolysis.
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18
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Canillas M, de Lima GG, Rodríguez MA, Nugent MJD, Devine DM. Bioactive composites fabricated by freezing-thawing method for bone regeneration applications. ACTA ACUST UNITED AC 2015. [DOI: 10.1002/polb.23974] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
| | - Gabriel G. de Lima
- Materials Research Institute, Athlone Institute of Technology; Athlone Ireland
| | | | | | - Declan M. Devine
- Materials Research Institute, Athlone Institute of Technology; Athlone Ireland
- Mayo Clinic; Rehabilitation Medicine Centre; Rochester Minnesota
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19
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Korbag I, Mohamed Saleh S. Studies on mechanical and biodegradability properties of PVA/lignin blend films. ACTA ACUST UNITED AC 2015. [DOI: 10.1080/00207233.2015.1082249] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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20
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Mechanically stable antimicrobial chitosan–PVA–silver nanocomposite coatings deposited on titanium implants. Carbohydr Polym 2015; 121:37-48. [DOI: 10.1016/j.carbpol.2014.12.027] [Citation(s) in RCA: 82] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2014] [Revised: 12/02/2014] [Accepted: 12/03/2014] [Indexed: 01/12/2023]
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21
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Bhattacharjee P, Kundu B, Naskar D, Maiti TK, Bhattacharya D, Kundu SC. Nanofibrous nonmulberry silk/PVA scaffold for osteoinduction and osseointegration. Biopolymers 2015; 103:271-84. [DOI: 10.1002/bip.22594] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2014] [Revised: 11/17/2014] [Accepted: 11/18/2014] [Indexed: 11/10/2022]
Affiliation(s)
- Promita Bhattacharjee
- Materials Science Centre; Indian Institute of Technology Kharagpur; Kharagpur 721302 India
| | - Banani Kundu
- Department of Biotechnology; Indian Institute of Technology Kharagpur; Kharagpur 721302 India
| | - Deboki Naskar
- Department of Biotechnology; Indian Institute of Technology Kharagpur; Kharagpur 721302 India
| | - Tapas K. Maiti
- Department of Biotechnology; Indian Institute of Technology Kharagpur; Kharagpur 721302 India
| | - Debasis Bhattacharya
- Materials Science Centre; Indian Institute of Technology Kharagpur; Kharagpur 721302 India
| | - Subhas C. Kundu
- Department of Biotechnology; Indian Institute of Technology Kharagpur; Kharagpur 721302 India
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22
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Huang CL, Peng SY, Wang YJ, Chen WC, Lin JH. Microstructure and characterization of electrospun poly(vinyl alcohol) nanofiber scaffolds filled with graphene nanosheets. J Appl Polym Sci 2015. [DOI: 10.1002/app.41891] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Chien-Lin Huang
- Department of Fiber and Composite Materials; Feng Chia University; Taichung 40724 Taiwan
| | - Sheng-Yin Peng
- Department of Fiber and Composite Materials; Feng Chia University; Taichung 40724 Taiwan
| | - Yu-Jyun Wang
- Department of Fiber and Composite Materials; Feng Chia University; Taichung 40724 Taiwan
| | - Wen-Cheng Chen
- Department of Fiber and Composite Materials; Feng Chia University; Taichung 40724 Taiwan
| | - Jia-Horng Lin
- Department of Fiber and Composite Materials; Feng Chia University; Taichung 40724 Taiwan
- School of Chinese Medicine; China Medical University; Taichung 40402 Taiwan
- Department of Biotechnology; Asia University; Taichung 41354 Taiwan
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23
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Carboxymethyl cellulose–polyvinyl alcohol films with clove oil for active packaging of ground chicken meat. Food Packag Shelf Life 2014. [DOI: 10.1016/j.fpsl.2014.07.002] [Citation(s) in RCA: 88] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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24
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Effects of crosslinking degree of poly(vinyl alcohol) hydrogel in aqueous solution: kinetics and mechanism of copper(II) adsorption. Polym Bull (Berl) 2014. [DOI: 10.1007/s00289-014-1112-7] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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25
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Senna MMH, Al-Shamrani KM, Al-Arifi AS. Edible Coating for Shelf-Life Extension of Fresh Banana Fruit Based on Gamma Irradiated Plasticized Poly(vinyl alcohol)/Carboxymethyl Cellulose/Tannin Composites. ACTA ACUST UNITED AC 2014. [DOI: 10.4236/msa.2014.56045] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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26
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Reinforcement of poly(vinyl alcohol) with chiral poly(amide-imide)s nanoparticles containing S-valine under simple ultrasonic irradiation method. Colloid Polym Sci 2013. [DOI: 10.1007/s00396-013-2997-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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27
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Muskovich M, Bettinger CJ. Biomaterials-based electronics: polymers and interfaces for biology and medicine. Adv Healthc Mater 2012; 1:248-66. [PMID: 23184740 PMCID: PMC3642371 DOI: 10.1002/adhm.201200071] [Citation(s) in RCA: 90] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2012] [Indexed: 12/18/2022]
Abstract
Advanced polymeric biomaterials continue to serve as a cornerstone for new medical technologies and therapies. The vast majority of these materials, both natural and synthetic, interact with biological matter in the absence of direct electronic communication. However, biological systems have evolved to synthesize and utilize naturally-derived materials for the generation and modulation of electrical potentials, voltage gradients, and ion flows. Bioelectric phenomena can be translated into potent signaling cues for intra- and inter-cellular communication. These cues can serve as a gateway to link synthetic devices with biological systems. This progress report will provide an update on advances in the application of electronically active biomaterials for use in organic electronics and bio-interfaces. Specific focus will be granted to covering technologies where natural and synthetic biological materials serve as integral components such as thin film electronics, in vitro cell culture models, and implantable medical devices. Future perspectives and emerging challenges will also be highlighted.
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Affiliation(s)
- Meredith Muskovich
- Department of Materials Science & Engineering, 5000 Forbes Avenue, Pittsburgh, PA, 15213
| | - Christopher J. Bettinger
- Department of Biomedical Engineering, Department of Materials Science & Engineering, 5000 Forbes Avenue, Pittsburgh, PA, 15213
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Jia D, Li J, Liu L, Zhang D, Yang Y, Du G, Chen J. High-level expression, purification, and enzymatic characterization of truncated poly(vinyl alcohol) dehydrogenase in methylotrophic yeast Pichia pastoris. Appl Microbiol Biotechnol 2012; 97:1113-20. [PMID: 22406863 DOI: 10.1007/s00253-012-3986-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2011] [Revised: 02/11/2012] [Accepted: 02/17/2012] [Indexed: 11/30/2022]
Abstract
A 1,965-bp fragment encoding a poly(vinyl alcohol) dehydrogenase (PVADH) from Sphingopyxis sp. 113P3 was synthesized based on the codon bias of the methylotrophic yeast Pichia pastoris. The fragment was then amplified by polymerase chain reaction and inserted into the site between EcoRI and NotI sites in pPIC9K, which was under the control of the AOX1 promoter and α-mating factor signal sequence from Saccharomyces cerevisiae. The recombinant plasmid, designated as pPIC9K-PVADH, was linearized using SalI and transformed into P. pastoris GS115 by electroporation. The PVADH activity reached 55 U/mL in a shake flask and 902 U/mL in a 3-L bioreactor. Surprisingly, the sodium dodecyl sulfate polyacrylamide gel electrophoresis analysis and N-terminal sequencing indicated that the secreted PVADH was truncated, and it had only 548 amino acid residues (an 81-amino acid sequence from the secreted protein was cleaved). The optimum pH and temperature ranges for the truncated PVADH were 7.0-8.0 and 41-53 °C, respectively. The activation energy of the recombinant truncated PVADH was approximately 10.36 kcal/mol between 29 and 41 °C. Both Ca(2+) and Mg(2+) had stimulating effects on the activity of PVADH. With PVA1799 as the substrate, the truncated PVADH had a Michaelis constant (K (m)) of 1.89 mg/mL and a maximum reaction rate (V (max)) of 34.9 nmol/(min mg protein). To the best of our knowledge, this is the first report on the expression of PVADH in P. pastoris, and the achieved PVADH yield is the highest ever reported.
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Affiliation(s)
- Dongxu Jia
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi, 214122, China
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30
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Indriyati, Yudianti R, Karina M. Development of Nanocomposites from Bacterial Cellulose and Poly(vinyl Alcohol) using Casting-drying Method. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.proche.2012.06.011] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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31
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Goyal R, Tripathi SK, Vazquez E, Kumar P, Gupta KC. Biodegradable Poly(vinyl alcohol)-polyethylenimine Nanocomposites for Enhanced Gene Expression In Vitro and In Vivo. Biomacromolecules 2011; 13:73-83. [DOI: 10.1021/bm201157f] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Ritu Goyal
- CSIR-Institute of Genomics and Integrative Biology, Delhi University
Campus, Mall Road, Delhi-110007, India
| | - Sushil K. Tripathi
- CSIR-Institute of Genomics and Integrative Biology, Delhi University
Campus, Mall Road, Delhi-110007, India
| | - Esther Vazquez
- Department
of Genetics
and Microbiology, Autonomous University of Barcelona, Campus Universitari, Bellaterra 08193,
Barcelona, Spain
| | - Pradeep Kumar
- CSIR-Institute of Genomics and Integrative Biology, Delhi University
Campus, Mall Road, Delhi-110007, India
| | - Kailash C. Gupta
- CSIR-Institute of Genomics and Integrative Biology, Delhi University
Campus, Mall Road, Delhi-110007, India
- CSIR-Indian Institute of Toxicology Research, Mahatma Gandhi Marg, Lucknow-226001,
U.P., India
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Li M, Liao X, Zhang D, Du G, Chen J. Yeast extract promotes cell growth and induces production of polyvinyl alcohol-degrading enzymes. Enzyme Res 2011; 2011:179819. [PMID: 21977311 PMCID: PMC3184429 DOI: 10.4061/2011/179819] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2011] [Revised: 07/29/2011] [Accepted: 08/02/2011] [Indexed: 11/20/2022] Open
Abstract
Polyvinyl alcohol-degrading enzymes (PVAases) have a great potential in bio-desizing processes for its low environmental impact and low energy consumption. In this study, the effect of yeast extract on PVAases production was investigated. A strategy of four-point yeast extract addition was developed and applied to maximize cell growth and PVAases production. As a result, the maximum dry cell weight achieved was 1.48 g/L and the corresponding PVAases activity was 2.99 U/mL, which are 46.5% and 176.8% higher than the control, respectively. Applying this strategy in a 7 L fermentor increased PVAases activity to 3.41 U/mL. Three amino acids (glycine, serine, and tyrosine) in yeast extract play a central role in the production of PVAases. These results suggest that the new strategy of four-point yeast extract addition could benefit PVAases production.
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Affiliation(s)
- Min Li
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China
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34
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Francis V, Subin SR, Bhat SG, Thachil ET. Characterization of linear low-density polyethylene/poly(vinyl alcohol) blends and their biodegradability by Vibrio sp. isolated from marine benthic environment. J Appl Polym Sci 2011. [DOI: 10.1002/app.34155] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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35
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Alves PM, Carvalho RA, Moraes IC, Luciano CG, Bittante AMQ, Sobral PJ. Development of films based on blends of gelatin and poly(vinyl alcohol) cross linked with glutaraldehyde. Food Hydrocoll 2011. [DOI: 10.1016/j.foodhyd.2011.03.018] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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36
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Amann M, Minge O. Biodegradability of Poly(vinyl acetate) and Related Polymers. SYNTHETIC BIODEGRADABLE POLYMERS 2011. [DOI: 10.1007/12_2011_153] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
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37
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Amine-modified poly(vinyl alcohol)s as non-viral vectors for siRNA delivery: effects of the degree of amine substitution on physicochemical properties and knockdown efficiency. Pharm Res 2010; 27:2670-82. [PMID: 20848302 DOI: 10.1007/s11095-010-0266-8] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2010] [Accepted: 08/30/2010] [Indexed: 10/19/2022]
Abstract
PURPOSE The objective of this study was to investigate how the degree of amine substitution of amine-modified poly(vinyl alcohol) (PVA) affects complexation of siRNA, protection of siRNA against degrading enzymes, intracellular uptake and gene silencing. METHODS A series of DEAPA-PVA polymers with increasing amine density was synthesized by modifying the hydroxyl groups in the PVA backbone with diethylamino propylamine groups using CDI chemistry. These polymers were characterized with regard to their ability to complex and protect siRNA against RNase. Finally, their potential to mediate intracellular uptake and gene silencing in SKOV-luc cells was investigated. RESULTS A good correlation between amine density and siRNA complexation as well as protection of siRNA against RNase was found. Consisting solely of tertiary amines, this class of polymer was able to mediate efficient gene silencing when approximately 30% of the hydroxyl groups in the PVA backbone were modified with diethylamino propylamine groups. Polymers with a lower amine density (up to 23%) were inefficient in gene silencing, while increasing the amine density to 48% led to non-specific knockdown effects. CONCLUSION DEAPA-PVA polymers were shown to mediate efficient gene silencing and offer a promising platform for further structural modifications.
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Senna MM, El-Shahat HA, El-Naggar AWM. Characterization of gamma irradiated plasticized starch/poly(vinyl alcohol) (PLST/PVA) blends and their application as protected edible materials. JOURNAL OF POLYMER RESEARCH 2010. [DOI: 10.1007/s10965-010-9473-6] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Dworak C, Koch T, Varga F, Liska R. Photopolymerization of biocompatible phosphorus-containing vinyl esters and vinyl carbamates. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/pola.24072] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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40
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Tang B, Liao X, Zhang D, Li M, Li R, Yan K, Du G, Chen J. Enhanced production of poly(vinyl alcohol)-degrading enzymes by mixed microbial culture using 1,4-butanediol and designed fermentation strategies. Polym Degrad Stab 2010. [DOI: 10.1016/j.polymdegradstab.2009.12.015] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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41
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Jiang Y, Schädlich A, Amado E, Weis C, Odermatt E, Mäder K, Kressler J. In-vivostudies on intraperitoneally administrated poly(vinyl alcohol). J Biomed Mater Res B Appl Biomater 2010; 93:275-84. [DOI: 10.1002/jbm.b.31585] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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42
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Kim MN, Yoon MG. Isolation of strains degrading poly(Vinyl alcohol) at high temperatures and their biodegradation ability. Polym Degrad Stab 2010. [DOI: 10.1016/j.polymdegradstab.2009.09.014] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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43
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Film forming solutions based on gelatin and poly(vinyl alcohol) blends: Thermal and rheological characterizations. J FOOD ENG 2009. [DOI: 10.1016/j.jfoodeng.2009.06.023] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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44
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Guo M, Xia J, Fan Z, Zhao Z, Mi H. Preparation and characterization of ultra-low molecular weight poly(vinyl alcohol) graft copolymer. J Appl Polym Sci 2009. [DOI: 10.1002/app.30453] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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46
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Biochemistry of microbial polyvinyl alcohol degradation. Appl Microbiol Biotechnol 2009; 84:227-37. [DOI: 10.1007/s00253-009-2113-6] [Citation(s) in RCA: 129] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2009] [Revised: 06/23/2009] [Accepted: 06/23/2009] [Indexed: 11/25/2022]
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47
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Carvalho R, Maria T, Moraes I, Bergo P, Kamimura E, Habitante A, Sobral P. Study of some physical properties of biodegradable films based on blends of gelatin and poly(vinyl alcohol) using a response-surface methodology. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2009. [DOI: 10.1016/j.msec.2008.08.030] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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48
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49
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Mendieta-Taboada O, Sobral PJDA, Carvalho RA, Habitante AMB. Thermomechanical properties of biodegradable films based on blends of gelatin and poly(vinyl alcohol). Food Hydrocoll 2008. [DOI: 10.1016/j.foodhyd.2007.10.001] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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50
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Maria TM, de Carvalho RA, Sobral PJ, Habitante AMB, Solorza-Feria J. The effect of the degree of hydrolysis of the PVA and the plasticizer concentration on the color, opacity, and thermal and mechanical properties of films based on PVA and gelatin blends. J FOOD ENG 2008. [DOI: 10.1016/j.jfoodeng.2007.11.026] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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