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Biosurfactant Production from Pineapple Waste and Application of Experimental Design and Statistical Analysis. Appl Biochem Biotechnol 2023; 195:386-400. [PMID: 36083431 DOI: 10.1007/s12010-022-04159-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/28/2022] [Indexed: 01/13/2023]
Abstract
The use of non-conventional carbon sources for biosurfactant-producing microorganisms is a promising alternative in fermentation to substitute costly substrates. So, the current research used pineapple peel as a cost-effective and renewable substrate because of its rich composition in minerals and sugars and high availability. Following a 22 full factorial design, a bacterial strain of Bacillus subtilis produced biosurfactants in fermentative media containing different concentrations of glucose and concentrated pineapple peel juice (CPPJ). The influence of these two independent variables was evaluated according to three different responses: surface tension reduction rate (STRR), emulsification index (EI24), and concentration of semi-purified biosurfactant (SPB). The maximum value for STRR (57.63%) was obtained in media containing 0.58% glucose (w/v) and 5.82% CPPJ (v/v), while the highest EI24 response (58.60%) was observed at 2% glucose (w/v) and 20% CPPJ (v/v) and maximum SPB (1.28 g/L) at 3.42% glucose (w/v) and 34.18% CPPJ (v/v). Statistical analysis indicated that the CPPJ variable mostly influenced the STRR and SPB responses, whereas the EI24 was significantly influenced by pineapple peel juice and glucose contents.
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2
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Sibirny AA. Metabolic engineering of non-conventional yeasts for construction of the advanced producers of biofuels and high-value chemicals. BBA ADVANCES 2022; 3:100071. [PMID: 37082251 PMCID: PMC10074886 DOI: 10.1016/j.bbadva.2022.100071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Non-conventional yeasts, i.e. yeasts different from Saccharomyces cerevisiae, represent heterogenous group of unicellular fungi consisting of near 1500 species. Some of these species have interesting and sometimes unique properties like ability to grow on methanol, n-alkanes, ferment pentose sugars xylose and l-arabinose, grow at high temperatures (50°С and more), overproduce riboflavin (vitamin B2) and others. These unique properties are important for development of basic science; moreover, some of them possess also significant applied interest for elaboration of new biotechnologies. Current paper represents review of the recent own results and of those of other authors in the field of non-conventional yeast study for construction of the advanced producers of biofuels (ethanol, isobutanol) from lignocellulosic sugars glucose and xylose or crude glycerol (Ogataea polymorpha, Magnusiomyces magnusii) and vitamin B2 (riboflavin) from glucose and cheese whey (Candida famata).
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Affiliation(s)
- Andriy A. Sibirny
- Institute of Cell Biology, NAS of Ukraine, Drahomanov Street 14/16, Lviv 79005 Ukraine
- University of Rzeszow, Zelwerowicza 4, Rzeszow 35-601 Poland
- Corresponding author at: Institute of Cell Biology, NAS of Ukraine, Drahomanov Street 14/16, Lviv 79005 Ukraine.
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3
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Panel Products Made of Oil Palm Trunk: A Review of Potency, Environmental Aspect, and Comparison with Wood-Based Composites. Polymers (Basel) 2022; 14:polym14091758. [PMID: 35566927 PMCID: PMC9104621 DOI: 10.3390/polym14091758] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Revised: 04/20/2022] [Accepted: 04/23/2022] [Indexed: 12/28/2022] Open
Abstract
Oil palm plantations have expanded rapidly in Southeast Asia, particularly in Indonesia and Malaysia. A lot of products, including food and other edible products, oleo-chemicals, cosmetics, personal and household care, pharmaceutical products, and biodiesels are derived from palm oil, thus making them one of the most economically important plants. After 25-30 years of age, the palms are felled and replaced due to declining oil production. Oil palm trunks (OPT) are considered significant waste products. The trunks remain on the plantation site for nutrient recycling or burning. This increases insect and fungi populations causing environmental problems for the new palm generation or air pollution due to the fire. Up till now, OPT has received less attention in research studies. Therefore, this review summarizes the utilization of OPT into products made of oil palm fibers mainly derived from OPT and its application as the substitution of wood panel products. Some research works have been carried out on oil palm fibers that are derived from OPT for exploiting their potential as raw material of composite panel products, which is the objective of this review. Areas of development are processed into various conventional composite panel products such as plywood and laminated board which are usually predominantly made of wood and bonded by synthetic resins, particleboard with binder, or binderless and cement board which is arranged with wood as a minor component. All of the products have been presented and described technically according to best knowledge of the authors and literature review.
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4
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Kim H, Yang S, Lim YH, Ha JM, Kim DH. Upgrading bio-oil model compound over bifunctional Ru/HZSM-5 catalysts in biphasic system: Complete hydrodeoxygenation of vanillin. JOURNAL OF HAZARDOUS MATERIALS 2022; 423:126525. [PMID: 34246521 DOI: 10.1016/j.jhazmat.2021.126525] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 06/21/2021] [Accepted: 06/25/2021] [Indexed: 06/13/2023]
Abstract
A complete hydrodeoxygenation(HDO) of vanillin to yield cycloalkanes was performed using bifunctional Ru loaded HZSM-5 catalysts with different metal loadings (0.1, 0.5, 1, 3, and 5 wt%) and Si/Al2 ratios (Si/Al2 = 23,300) in n-octane/water biphasic system. Both the reaction pathway and product distribution were influenced by the metal/acid balance of the catalysts. Higher metal/acid ratio promoted Caryl-C cleavage reaction, resulting in the increased yield of cyclohexane. Synergetic effect of metal and acid sites was observed in the bifunctional catalyst, attaining as high as 40-fold increase of metal efficiency in the ring hydrogenation reaction, compared to lone metal site catalyst. The effect of solvent composition was evaluated, revealing that the presence of water promoted the overall HDO reaction. By balancing metal/acid and introducing appropriate solvent system, efficient catalytic system that minimized carbon loss and improved metal efficiency for vanillin HDO was obtained.
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Affiliation(s)
- Hyungjoo Kim
- School of Chemical and Biological Engineering, Institute of Chemical Process, Seoul National University, 1, Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Seungdo Yang
- School of Chemical and Biological Engineering, Institute of Chemical Process, Seoul National University, 1, Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Yong Hyun Lim
- School of Chemical and Biological Engineering, Institute of Chemical Process, Seoul National University, 1, Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Jeong-Myeong Ha
- Clean Energy Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
| | - Do Heui Kim
- School of Chemical and Biological Engineering, Institute of Chemical Process, Seoul National University, 1, Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea.
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5
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EntadaGigas seeds mediated synthesis of carbon for dielectric and sensing applications. SENSORS INTERNATIONAL 2022. [DOI: 10.1016/j.sintl.2022.100162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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6
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Souza CSF, Souza BHS, Parrella RAC, Simeone MLF, Nascimento PT, França JCO, Lima PF, Mendes SM. Resistance of bmr energy sorghum hybrids to sugarcane borer and fall armyworm. BRAZ J BIOL 2021; 84:e251883. [PMID: 34852137 DOI: 10.1590/1519-6984.251883] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Accepted: 08/26/2021] [Indexed: 11/22/2022] Open
Abstract
The lower lignin content in plants species with energy potential results in easier cellulose breakdown, making glucose available for ethanol generation. However, higher lignin levels can increase resistance to insect attack. The objective of this work was to evaluate the susceptibility of a bmr-6 biomass sorghum (a mutant genotype with a lower concentration of lignin) to important pests of energy sorghum, Diatraea saccharalis and Spodoptera frugiperda. Experiments were performed in the laboratory and greenhouse to evaluate the development of these pests on the biomass sorghum bmr hybrids BR007, BR008, and TX635 and their respective conventional near-isogenic genotypes (without the bmr gene). The lignin content was higher in non-bmr hybrids, but the evaluated insect variables varied between treatments, not being consistent in just one hybrid or because it is bmr or not. The lowest survival of S. frugiperda was observed in the BR008 hybrid, both bmr and non-bmr. The S. frugiperda injury scores on plants in the greenhouse were high (>7) in all treatments. For D. saccharalis, there was no difference in larval survival in the laboratory, but in the greenhouse, the BR007 hybrid, both bmr and non-bmr, provided greater survival. Due the need to diversify the energy matrix and the fact that greater susceptibility of the bmr hybrids to either pests was not found in this study, these results hold promise for cultivation of these biomass sorghum hybrids for the production of biofuels.
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Affiliation(s)
- C S F Souza
- Universidade Federal de Lavras, Campus Universitário, Departament of Entomology, Lavras, MG, Brasil
| | - B H S Souza
- Universidade Federal de Lavras, Campus Universitário, Departament of Entomology, Lavras, MG, Brasil
| | | | | | - P T Nascimento
- Universidade Federal de Lavras, Campus Universitário, Departament of Entomology, Lavras, MG, Brasil
| | - J C O França
- Universidade Federal de Lavras, Campus Universitário, Departament of Entomology, Lavras, MG, Brasil
| | - P F Lima
- Universidade Federal de São João Del Rei, Campus de Sete Lagoas, Sete Lagoas, MG, Brasil
| | - S M Mendes
- Embrapa Milho e Sorgo, Sete Lagoas, MG, Brasil
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7
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Waste Materials as a Resource for Production of CMC Superabsorbent Hydrogel for Sustainable Agriculture. Polymers (Basel) 2021; 13:polym13234115. [PMID: 34883618 PMCID: PMC8659456 DOI: 10.3390/polym13234115] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 11/10/2021] [Accepted: 11/22/2021] [Indexed: 01/31/2023] Open
Abstract
Waste materials are receiving more attention as concerns about the future of our planet increase. Cellulose is the most common substance in agricultural waste. Agricultural wastes containing cellulose are misplaced resources that could be reused in various fields for both environmental and economic benefits. In this work, 32 different kinds of waste are investigated for chemical modification in order to obtain carboxymethyl cellulose for the production of a superabsorbent hydrogel that can be applied in agriculture. A brief literature review is provided to help researchers wishing to obtain carboxymethyl cellulose by carboxymethylation starting with waste materials. We also provide details about methods to obtain as well as verify carboxymethylation. Carboxymethyl cellulose (CMC), as a constituent of cellulosic water and superabsorbent hydrogels with applications in agriculture, is described. Superabsorbent hydrogels with CMC are able to absorb huge amounts of water and are biodegradable.
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8
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Core Elements towards Circularity: Evidence from the European Countries. SUSTAINABILITY 2021. [DOI: 10.3390/su13168742] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
In this paper, the authors identified key elements important for circularity. The primary goal of circularity is to eliminate waste and prove the constant use of resources. In the paper, we classified studies according to circular approaches and stated which of them get the highest attention. Further, we identified the principal elements, grouped them into four categories important for circularity, and presented scientific works dedicated to each of the above-mentioned categories. Further on, several core elements from the first category were investigated, aiming to connect different waste streams and provide a regression model. Finally, the methodological part reviewed the correlation between various types of waste and their recycling and selected suitable ones for developing a new panel regression model. The empirical research was delivered for the 27 European Union countries during the period between 2000 and 2019. We indicate that the recycling rate of municipal waste impacts the increase of recycling biowaste the same calendar year. The increase of recycling of municipal waste by one per cent means the increase of the recycling of biowaste by 0.6 per cent.
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9
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Catalytic Pyrolysis of Lignin Model Compounds (Pyrocatechol, Guaiacol, Vanillic and Ferulic Acids) over Nanoceria Catalyst for Biomass Conversion. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11167205] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Understanding the mechanisms of thermal transformations of model lignin compounds (MLC) over nanoscale catalysts is important for improving the technologic processes occurring in the pyrolytic conversion of lignocellulose biomass into biofuels and value-added chemicals. Herein, we investigate catalytic pyrolysis of MLC (pyrocatechol (P), guaiacol (G), ferulic (FA), and vanillic acids (VA)) over nanoceria using FT-IR spectroscopy, temperature-programmed desorption mass spectrometry (TPD MS), and thermogravimetric analysis (DTG/DTA/TG). FT-IR spectroscopic studies indicate that the active groups of aromatic rings of P, G, VA, and FA as well as carboxylate groups of VA and FA are involved in the interaction with nanoceria surface. We explore the general transformation mechanisms of different surface complexes and identify their decomposition products. We demonstrate that decomposition of carboxylate acid complexes occurs by decarboxylation. When FA is used as a precursor, this reaction generates 4-vinylguaiacol. Complexes of VA and FA formed through both active groups of the aromatic ring and decompose on the CeO2 surface to generate hydroxybenzene. The formation of alkylated products accompanies catalytic pyrolysis of acids due to processes of transalkylation on the surface.
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10
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Tenhaef N, Kappelmann J, Eich A, Weiske M, Brieß L, Brüsseler C, Marienhagen J, Wiechert W, Noack S. Microaerobic growth-decoupled production of α-ketoglutarate and succinate from xylose in a one-pot process using Corynebacterium glutamicum. Biotechnol J 2021; 16:e2100043. [PMID: 34089621 DOI: 10.1002/biot.202100043] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2021] [Revised: 06/01/2021] [Accepted: 06/03/2021] [Indexed: 11/10/2022]
Abstract
BACKGROUND Lignocellulosic biomass is the most abundant raw material on earth. Its efficient use for novel bio-based materials is essential for an emerging bioeconomy. Possible building blocks for such materials are the key TCA-cycle intermediates α-ketoglutarate and succinate. These organic acids have a wide range of potential applications, particularly in use as monomers for established or novel biopolymers. Recently, Corynebacterium glutamicum was successfully engineered and evolved towards an improved utilization of d-xylose via the Weimberg pathway, yielding the strain WMB2evo . The Weimberg pathway enables a carbon-efficient C5-to-C5 conversion of d-xylose to α-ketoglutarate and a shortcut route to succinate as co-product in a one-pot process. METHODS AND RESULTS C. glutamicum WMB2evo was grown under dynamic microaerobic conditions on d-xylose, leading to the formation of comparably high amounts of succinate and only small amounts of α-ketoglutarate. Subsequent carbon isotope labeling experiments verified the targeted production route for both products in C. glutamicum WMB2evo . Fed-batch process development was initiated and the effect of oxygen supply and feeding strategy for a growth-decoupled co-production of α-ketoglutarate and succinate were studied in detail. The finally established fed-batch production process resulted in the formation of 78.4 mmol L-1 (11.45 g L-1 ) α-ketoglutarate and 96.2 mmol L-1 (11.36 g L-1 ) succinate. CONCLUSION The developed one-pot process represents a promising approach for the combined supply of bio-based α-ketoglutarate and succinate. Future work will focus on tailor-made down-stream processing of both organic acids from the fermentation broth to enable their application as building blocks in chemical syntheses. Alternatively, direct conversion of one or both acids via whole-cell or cell-free enzymatic approaches can be envisioned; thus, extending the network of value chains starting from cheap and renewable d-xylose.
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Affiliation(s)
- Niklas Tenhaef
- Institute of Bio- and Geosciences, IBG-1: Biotechnology, Forschungszentrum Jülich GmbH, Jülich, Germany.,Bioeconomy Science Center (BioSC), Forschungszentrum Jülich GmbH, Jülich, Germany
| | - Jannick Kappelmann
- Institute of Bio- and Geosciences, IBG-1: Biotechnology, Forschungszentrum Jülich GmbH, Jülich, Germany.,Currenta GmbH & Co. OHG, Leverkusen, Germany
| | - Arabel Eich
- Institute of Bio- and Geosciences, IBG-1: Biotechnology, Forschungszentrum Jülich GmbH, Jülich, Germany
| | - Marc Weiske
- Institute of Bio- and Geosciences, IBG-1: Biotechnology, Forschungszentrum Jülich GmbH, Jülich, Germany
| | - Lisette Brieß
- Institute of Bio- and Geosciences, IBG-1: Biotechnology, Forschungszentrum Jülich GmbH, Jülich, Germany
| | - Christian Brüsseler
- Institute of Bio- and Geosciences, IBG-1: Biotechnology, Forschungszentrum Jülich GmbH, Jülich, Germany.,Bioeconomy Science Center (BioSC), Forschungszentrum Jülich GmbH, Jülich, Germany
| | - Jan Marienhagen
- Institute of Bio- and Geosciences, IBG-1: Biotechnology, Forschungszentrum Jülich GmbH, Jülich, Germany.,Bioeconomy Science Center (BioSC), Forschungszentrum Jülich GmbH, Jülich, Germany.,Institute of Biotechnology, RWTH Aachen University, Aachen, Germany
| | - Wolfgang Wiechert
- Institute of Bio- and Geosciences, IBG-1: Biotechnology, Forschungszentrum Jülich GmbH, Jülich, Germany.,Bioeconomy Science Center (BioSC), Forschungszentrum Jülich GmbH, Jülich, Germany.,Computational Systems Biotechnology (AVT.CSB), RWTH Aachen University, Aachen, Germany
| | - Stephan Noack
- Institute of Bio- and Geosciences, IBG-1: Biotechnology, Forschungszentrum Jülich GmbH, Jülich, Germany.,Bioeconomy Science Center (BioSC), Forschungszentrum Jülich GmbH, Jülich, Germany
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11
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Chen C, Deng X, Kong W, Qaseem MF, Zhao S, Li Y, Wu AM. Rice Straws With Different Cell Wall Components Differ on Abilities of Saccharification. Front Bioeng Biotechnol 2021; 8:624314. [PMID: 33553128 PMCID: PMC7855461 DOI: 10.3389/fbioe.2020.624314] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2020] [Accepted: 12/21/2020] [Indexed: 11/13/2022] Open
Abstract
Rice straw has an enormous amount of biomass for energy use, but the complexity of the cell wall component hinders technical processes. Although belonging to rice straws, the straws from different varieties should be with different treatment strategies to obtain best energy efficiency. To confirm this hypothesis, 7 different rice varieties (RPY GENG, RIL269, RIL272, RIL31, RIL57, RIL06, LUOHUI 9) with different cell wall traits from RIL population were evaluated for their response toward different pretreatments. For japonica RPY GENG, 2% of H2SO4 acid was best pre-treatment while high acid (5% of H2SO4) pretreatment caused undue loss. For Indica LUOHUI 9 rice, high acid pretreatment was suitable, while RIL57 had maximum of glucose yield with high alkali (10% NaOH) pretreatment. High-concentration alkali pretreatment is the most convenient and effective pretreatment method for the treatment of unknown varieties of rice straws, because the lignin has been removed and has the lowest negative effects on the glucose yield under the high alkali condition. As the RILs used in this study vary considerably in their wall structure, an understanding of their response to different pre-treatments confirms our hypothesis and help us to understand the influence of different wall compositions on the final output.
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Affiliation(s)
- Chen Chen
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, China.,Guangdong Laboratory of Lingnan Modern Agriculture, South China Agricultural University, Guangzhou, China.,Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architectures, South China Agricultural University, Guangzhou, China
| | - Xiaoxiao Deng
- State Key Laboratory for Hybrid Rice, College of Life Sciences, Wuhan University, Wuhan, China
| | - Weilong Kong
- State Key Laboratory for Hybrid Rice, College of Life Sciences, Wuhan University, Wuhan, China
| | - Mirza Faisal Qaseem
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, China.,Guangdong Laboratory of Lingnan Modern Agriculture, South China Agricultural University, Guangzhou, China.,Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architectures, South China Agricultural University, Guangzhou, China
| | - Shuai Zhao
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangxi Research Center for Microbial and Enzyme Engineering Technology, College of Life Science and Technology, Guangxi University, Nanning, China
| | - Yangsheng Li
- State Key Laboratory for Hybrid Rice, College of Life Sciences, Wuhan University, Wuhan, China
| | - Ai-Min Wu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, China.,Guangdong Laboratory of Lingnan Modern Agriculture, South China Agricultural University, Guangzhou, China.,Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architectures, South China Agricultural University, Guangzhou, China
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12
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Ubando AT, Del Rosario AJR, Chen WH, Culaba AB. A state-of-the-art review of biowaste biorefinery. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 269:116149. [PMID: 33280912 DOI: 10.1016/j.envpol.2020.116149] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Revised: 11/16/2020] [Accepted: 11/20/2020] [Indexed: 06/12/2023]
Abstract
Biorefineries provide a platform for different industries to produce multiple bio-products enhancing the economic value of the system. The production of these biorefineries has led to an increase in the generation of biowaste. To minimize the risk of environmental pollution, numerous studies have focused on a variety of strategies to mitigate these concerns reflected in the vast amount of literature written on this topic. This paper aims to systematically analyze and review the enormous body of scientific literature in the biowaste and biorefinery field for establishing an understanding and providing a direction for future works. A bibliometric analysis is first performed using the CorTexT Manager platform on a corpus of 1488 articles written on the topic of biowaste. Popular and emerging topics are determined using a terms extraction algorithm. A contingency matrix is then created to study the correlation of scientific journals and key topics from this field. Then, the connection and evolution of these terms were analyzed using network mapping, to determine relationships among key terms and analyze notable trends in this research field. Finally, a critical review of articles was presented across three main categories of biowaste management such as mitigation, sustainable utilization, and cleaner disposal from the perspective of the biorefinery concept. Operational and technological challenges are identified for the integration of anaerobic digestion in biorefineries, especially in developing nations. Moreover, logistical challenges in the biorefinery supply-chain are established based on the economics and collection aspect of handling biowaste.
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Affiliation(s)
- Aristotle T Ubando
- Mechanical Engineering Department, De La Salle University, 2401 Taft Avenue, 0922, Manila, Philippines; Center for Engineering and Sustainable Development Research, De La Salle University, Manila, 0922, Philippines; Thermomechanical Laboratory, De La Salle University, Laguna Campus, LTI Spine Road, Laguna Blvd, Biñan, Laguna, 4024, Philippines
| | - Aaron Jules R Del Rosario
- Mechanical Engineering Department, De La Salle University, 2401 Taft Avenue, 0922, Manila, Philippines; Center for Engineering and Sustainable Development Research, De La Salle University, Manila, 0922, Philippines
| | - Wei-Hsin Chen
- Department of Aeronautics and Astronautics, National Cheng Kung University, Tainan, 701, Taiwan; Research Center for Smart Sustainable Circular Economy, Tunghai University, Taichung, 407, Taiwan; Department of Mechanical Engineering, National Chin-Yi University of Technology, Taichung, 411, Taiwan.
| | - Alvin B Culaba
- Mechanical Engineering Department, De La Salle University, 2401 Taft Avenue, 0922, Manila, Philippines; Center for Engineering and Sustainable Development Research, De La Salle University, Manila, 0922, Philippines
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13
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Choudhary R, Venkatraman SK, Bulygina I, Senatov F, Kaloshkin S, Anisimova N, Kiselevskiy M, Knyazeva M, Kukui D, Walther F, Swamiappan S. Biomineralization, dissolution and cellular studies of silicate bioceramics prepared from eggshell and rice husk. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2021; 118:111456. [DOI: 10.1016/j.msec.2020.111456] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Revised: 08/16/2020] [Accepted: 08/25/2020] [Indexed: 12/25/2022]
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14
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Ruchala J, Sibirny AA. Pentose metabolism and conversion to biofuels and high-value chemicals in yeasts. FEMS Microbiol Rev 2020; 45:6034013. [PMID: 33316044 DOI: 10.1093/femsre/fuaa069] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Accepted: 12/09/2020] [Indexed: 12/15/2022] Open
Abstract
Pentose sugars are widespread in nature and two of them, D-xylose and L-arabinose belong to the most abundant sugars being the second and third by abundance sugars in dry plant biomass (lignocellulose) and in general on planet. Therefore, it is not surprising that metabolism and bioconversion of these pentoses attract much attention. Several different pathways of D-xylose and L-arabinose catabolism in bacteria and yeasts are known. There are even more common and really ubiquitous though not so abundant pentoses, D-ribose and 2-deoxy-D-ribose, the constituents of all living cells. Thus, ribose metabolism is example of endogenous metabolism whereas metabolism of other pentoses, including xylose and L-arabinose, represents examples of the metabolism of foreign exogenous compounds which normally are not constituents of yeast cells. As a rule, pentose degradation by the wild-type strains of microorganisms does not lead to accumulation of high amounts of valuable substances; however, productive strains have been obtained by random selection and metabolic engineering. There are numerous reviews on xylose and (less) L-arabinose metabolism and conversion to high value substances; however, they mostly are devoted to bacteria or the yeast Saccharomyces cerevisiae. This review is devoted to reviewing pentose metabolism and bioconversion mostly in non-conventional yeasts, which naturally metabolize xylose. Pentose metabolism in the recombinant strains of S. cerevisiae is also considered for comparison. The available data on ribose, xylose, L-arabinose transport, metabolism, regulation of these processes, interaction with glucose catabolism and construction of the productive strains of high-value chemicals or pentose (ribose) itself are described. In addition, genome studies of the natural xylose metabolizing yeasts and available tools for their molecular research are reviewed. Metabolism of other pentoses (2-deoxyribose, D-arabinose, lyxose) is briefly reviewed.
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Affiliation(s)
- Justyna Ruchala
- Department of Microbiology and Molecular Genetics, University of Rzeszow, Zelwerowicza 4, Rzeszow 35-601, Poland.,Department of Molecular Genetics and Biotechnology, Institute of Cell Biology NAS of Ukraine, Drahomanov Street, 14/16, Lviv 79005, Ukraine
| | - Andriy A Sibirny
- Department of Microbiology and Molecular Genetics, University of Rzeszow, Zelwerowicza 4, Rzeszow 35-601, Poland.,Department of Molecular Genetics and Biotechnology, Institute of Cell Biology NAS of Ukraine, Drahomanov Street, 14/16, Lviv 79005, Ukraine
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15
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Stylianou E, Pateraki C, Ladakis D, Cruz-Fernández M, Latorre-Sánchez M, Coll C, Koutinas A. Evaluation of organic fractions of municipal solid waste as renewable feedstock for succinic acid production. BIOTECHNOLOGY FOR BIOFUELS 2020; 13:72. [PMID: 32322302 PMCID: PMC7160979 DOI: 10.1186/s13068-020-01708-w] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2020] [Accepted: 04/02/2020] [Indexed: 05/06/2023]
Abstract
BACKGROUND Despite its high market potential, bio-based succinic acid production experienced recently a declining trend because the initial investments did not meet the expectations for rapid market growth. Thus, reducing the succinic acid production cost is imperative to ensure industrial implementation. RESULTS Succinic acid production has been evaluated using hydrolysates from the organic fraction of municipal solid waste (OFMSW) collected from MSW treatment plants. A tailor-made enzymatic cocktail was used for OFMSW hydrolysate production containing up to 107.3 g/L carbon sources and up to 638.7 mg/L free amino nitrogen. The bacterial strains Actinobacillus succinogenes and Basfia succiniciproducens were evaluated for succinic acid production with the latter strain being less efficient due to high lactic acid production. Batch A. succinogenes cultures supplemented with 5 g/L yeast extract and 5 g/L MgCO3 reached 29.4 g/L succinic acid with productivity of 0.89 g/L/h and yield of 0.56 g/g. Continuous cultures at dilution rate of 0.06 h-1 reached 21.2 g/L succinic acid with yield of 0.47 g/g and productivity of 1.27 g/L/h. Downstream separation and purification of succinic acid was achieved by centrifugation, treatment with activated carbon, acidification with cation exchange resins, evaporation and drying, reaching more than 99% purity. Preliminary techno-economic evaluation has been employed to evaluate the profitability potential of bio-based succinic acid production. CONCLUSIONS The use of OFMSW hydrolysate in continuous cultures could lead to a minimum selling price of 2.5 $/kg at annual production capacity of 40,000 t succinic acid and OFMSW hydrolysate production cost of 25 $/t sugars.
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Affiliation(s)
- Eleni Stylianou
- Department of Food Science and Human Nutrition, Agricultural University of Athens, Iera Odos 75, 118 55 Athens, Greece
| | - Chrysanthi Pateraki
- Department of Food Science and Human Nutrition, Agricultural University of Athens, Iera Odos 75, 118 55 Athens, Greece
| | - Dimitrios Ladakis
- Department of Food Science and Human Nutrition, Agricultural University of Athens, Iera Odos 75, 118 55 Athens, Greece
| | | | | | - Caterina Coll
- IMECAL SA, Carretera Carlet, 74, L’Alcudia, 46250 Valencia, Spain
| | - Apostolis Koutinas
- Department of Food Science and Human Nutrition, Agricultural University of Athens, Iera Odos 75, 118 55 Athens, Greece
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16
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Angulo Barrios C. Scotch Tape Optical Vapor Sensor for Ethanol-Methanol Mixtures. SENSORS (BASEL, SWITZERLAND) 2019; 19:s19245381. [PMID: 31817582 PMCID: PMC6960745 DOI: 10.3390/s19245381] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Revised: 11/29/2019] [Accepted: 12/04/2019] [Indexed: 05/16/2023]
Abstract
A simple optical vapor sensor based on conventional Scotch adhesive tape, for analyzing ethanol-methanol mixtures, is proposed and demonstrated. The sensing signal relies on the variation of optical power transmitted through the tape, resulting from the response of the adhesive material to vapor sorption. The optical sensor exhibits high selectivity for ethanol vapor over methanol vapor. When exposed to vapors from ethanol-methanol liquid mixtures, the sensor shows a linear detection range of 0-100 vol%, and detection limits of 8.8 vol% ethanol and 17.6 vol% methanol. Repeatability, reproducibility, reversibility, and sensitivity to other volatile organic compounds are also studied.
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Affiliation(s)
- Carlos Angulo Barrios
- Institute for Optoelectronic Systems and Microtechnology (ISOM), ETSI Telecomunicación, Universidad Politécnica de Madrid, Ciudad Universitaria s/n, 28040 Madrid, Spain;
- Department of Photonics and Bioengineering (TFB), ETSI Telecomunicación, Universidad Politécnica de Madrid, Ciudad Universitaria s/n, 28040 Madrid, Spain
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17
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Sekhohola-Dlamini L, Tekere M. Microbiology of municipal solid waste landfills: a review of microbial dynamics and ecological influences in waste bioprocessing. Biodegradation 2019; 31:1-21. [PMID: 31512011 DOI: 10.1007/s10532-019-09890-x] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Accepted: 08/26/2019] [Indexed: 12/21/2022]
Abstract
Municipal solid waste landfills are widely used as a waste management tool and landfill microbiology is at the core of waste degradation in these ecosystems. This review investigates the microbiology of municipal solid waste landfills, focusing on the current state of knowledge pertaining to microbial diversity and functions facilitating in situ waste bioprocessing, as well as ecological factors influencing microbial dynamics in landfills. Bioprocessing of waste in municipal landfills emanates from substrate metabolism and co-metabolism by several syntrophic microorganisms, resulting in partial transformation of complex substrates into simpler polymeric compounds and complete mineralisation into inorganic salts, water and gases including the biofuel gas methane. The substrate decomposition is characterised by evolution and interactions of different bacterial, archaeal and fungal groups due to prevailing biotic and abiotic conditions in the landfills, allowing for hydrolytic, fermentative, acetogenic and methanogenic processes to occur. Application of metagenomics studies based on high throughput Next Generation Sequencing technique has advanced research on profiling of the microbial communities in municipal solid waste landfills. However, functional diversity and bioprocess dynamics, as well as key factors influencing the in situ bioprocesses involved in landfill waste degradation; the very elements that are key in determining the efficiency of municipal landfills as tools of waste management, remain ambiguous. Such gaps also hinder progressive understanding of fundamentals that underlie technology development based on waste biodegradation, and exploration of municipal waste as a bioresource.
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Affiliation(s)
- Lerato Sekhohola-Dlamini
- Department of Environmental Sciences, University of South Africa (UNISA), Florida, P.O. Box X6, Johannesburg, 1710, South Africa.
| | - Memory Tekere
- Department of Environmental Sciences, University of South Africa (UNISA), Florida, P.O. Box X6, Johannesburg, 1710, South Africa
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18
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Huynh TTK, Tran TQN, Yoon HH, Kim WJ, Kim IT. AgNi@ZnO nanorods grown on graphene as an anodic catalyst for direct glucose fuel cells. KOREAN J CHEM ENG 2019. [DOI: 10.1007/s11814-019-0293-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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19
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De Groof V, Coma M, Arnot T, Leak DJ, Lanham AB. Medium Chain Carboxylic Acids from Complex Organic Feedstocks by Mixed Culture Fermentation. Molecules 2019; 24:E398. [PMID: 30678297 PMCID: PMC6384945 DOI: 10.3390/molecules24030398] [Citation(s) in RCA: 71] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Revised: 01/10/2019] [Accepted: 01/18/2019] [Indexed: 12/22/2022] Open
Abstract
Environmental pressures caused by population growth and consumerism require the development of resource recovery from waste, hence a circular economy approach. The production of chemicals and fuels from organic waste using mixed microbial cultures (MMC) has become promising. MMC use the synergy of bio-catalytic activities from different microorganisms to transform complex organic feedstock, such as by-products from food production and food waste. In the absence of oxygen, the feedstock can be converted into biogas through the established anaerobic digestion (AD) approach. The potential of MMC has shifted to production of intermediate AD compounds as precursors for renewable chemicals. A particular set of anaerobic pathways in MMC fermentation, known as chain elongation, can occur under specific conditions producing medium chain carboxylic acids (MCCAs) with higher value than biogas and broader applicability. This review introduces the chain elongation pathway and other bio-reactions occurring during MMC fermentation. We present an overview of the complex feedstocks used, and pinpoint the main operational parameters for MCCAs production such as temperature, pH, loading rates, inoculum, head space composition, and reactor design. The review evaluates the key findings of MCCA production using MMC, and concludes by identifying critical research targets to drive forward this promising technology as a valorisation method for complex organic waste.
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Affiliation(s)
- Vicky De Groof
- EPSRC Centre for Doctoral Training in Sustainable Chemical Technologies, University of Bath, Claverton Down, Bath BA2 7AY, UK.
- Department of Chemical Engineering, University of Bath, Claverton Down, Bath BA2 7AY, UK.
| | - Marta Coma
- Centre for Sustainable Chemical Technologies (CSCT), University of Bath, Claverton Down, Bath BA2 7AY, UK.
| | - Tom Arnot
- Department of Chemical Engineering, University of Bath, Claverton Down, Bath BA2 7AY, UK.
- Water Innovation & Research Centre (WIRC), University of Bath, Claverton Down, Bath BA2 7AY, UK.
| | - David J Leak
- Centre for Sustainable Chemical Technologies (CSCT), University of Bath, Claverton Down, Bath BA2 7AY, UK.
- Department of Biology & Biochemistry, University of Bath, Claverton Down, Bath BA2 7AY, UK.
| | - Ana B Lanham
- Department of Chemical Engineering, University of Bath, Claverton Down, Bath BA2 7AY, UK.
- Water Innovation & Research Centre (WIRC), University of Bath, Claverton Down, Bath BA2 7AY, UK.
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20
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Li Y, Fu T, Geng L, Shi Y, Chu H, Liu F, Liu C, Song F, Zhang J, Shu C. Protaetia brevitarsis larvae can efficiently convert herbaceous and ligneous plant residues to humic acids. WASTE MANAGEMENT (NEW YORK, N.Y.) 2019; 83:79-82. [PMID: 30514474 DOI: 10.1016/j.wasman.2018.11.010] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2018] [Revised: 09/11/2018] [Accepted: 11/07/2018] [Indexed: 06/09/2023]
Abstract
Utilization of the organic residues produced after crop harvesting is currently an important issue across the world. The edible insect Protaetia brevitarsis larvae can feed various organic matters. In this paper, we investigated the potential to utilize the insect to convert herbaceous and ligneous plant residues. We feed the insect larvae with maize straw and sawdust and analyzed the produced insect manure. P. brevitarsis larval was found to be able to digest both herbaceous and ligneous straw and insect manure extract shown no phytotoxicity. The mass fractions of humic acids (HAs) in the insect manure derived from maize straw and sawdust digestion were 24.37% and 14.46%, respectively. The 13C cross-polarization magic-angle spinning nuclear magnetic resonance (CP-MAS NMR) spectra data indicated that the HAs in the insect manure were similar to those found in the soil. These data suggested that P. brevitarsis larvae can be used to convert agricultural residues and produce organic fertilizers.
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Affiliation(s)
- Yimei Li
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, PR China
| | - Tong Fu
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, PR China
| | - Lili Geng
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, PR China
| | - Yu Shi
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, PR China
| | - Haiyan Chu
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, PR China
| | - Fushun Liu
- Cangzhou Academy of Agricultural and Forestry Sciences, Cangzhou 061001, PR China
| | - Chunqin Liu
- Cangzhou Academy of Agricultural and Forestry Sciences, Cangzhou 061001, PR China
| | - Fuping Song
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, PR China
| | - Jie Zhang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, PR China
| | - Changlong Shu
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, PR China.
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21
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Zhao J, Zhang Y, Wang K, Yan C, Da Z, Li C, Yan Y. Development of Hierarchical Porous MOF-Based Catalyst of UiO-66(Hf) and Its Application for 5-Hydroxymethylfurfural Production from Cellulose. ChemistrySelect 2018. [DOI: 10.1002/slct.201802423] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Jiaojiao Zhao
- School of Chemistry and Chemical Engineering; Jiangsu University; Xuefu Road 301 Zhenjiang 212013, PR China
| | - Yunlei Zhang
- School of Chemistry and Chemical Engineering; Jiangsu University; Xuefu Road 301 Zhenjiang 212013, PR China
| | - Kai Wang
- School of Chemistry and Chemical Engineering; Jiangsu University; Xuefu Road 301 Zhenjiang 212013, PR China
| | - Changhao Yan
- Research Center of Fluid Machinery Engineering and Technology; Jiangsu University; Xuefu Road 301 Zhenjiang 212013 PR China
| | - Zulin Da
- School of Chemistry and Chemical Engineering; Jiangsu University; Xuefu Road 301 Zhenjiang 212013, PR China
| | - Chunxiang Li
- School of Chemistry and Chemical Engineering; Jiangsu University; Xuefu Road 301 Zhenjiang 212013, PR China
| | - Yongsheng Yan
- School of Chemistry and Chemical Engineering; Jiangsu University; Xuefu Road 301 Zhenjiang 212013, PR China
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22
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Zhiani M, Abedini A, Majidi S. Comparison of Electro-Catalytic Activity of Fe-Ni-Co/C and Pd/C Nanoparticles for Glucose Electro-Oxidation in Alkaline Half-Cell and Direct Glucose Fuel Cell. Electrocatalysis (N Y) 2018. [DOI: 10.1007/s12678-018-0483-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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23
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Development of amperometric biosensors using screen-printed carbon electrodes modified with conducting polymer and nanomaterials for the analysis of ethanol, methanol and their mixtures. J Electroanal Chem (Lausanne) 2018. [DOI: 10.1016/j.jelechem.2018.07.009] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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24
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Wang M, Ma Z, Li J, Zhang Z, Tang B, Wang X. Well-dispersed palladium nanoparticles on nickel- phosphorus nanosheets as efficient three-dimensional platform for superior catalytic glucose electro-oxidation and non-enzymatic sensing. J Colloid Interface Sci 2018; 511:355-364. [DOI: 10.1016/j.jcis.2017.10.008] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Revised: 10/02/2017] [Accepted: 10/03/2017] [Indexed: 10/18/2022]
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25
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Chen J, Zheng H, Kang J, Yang F, Cao Y, Xiang M. An alkaline direct oxidation glucose fuel cell using three-dimensional structural Au/Ni-foam as catalytic electrodes. RSC Adv 2017. [DOI: 10.1039/c6ra27586a] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Glucose is an ideal fuel for fuel cells because it is abundant in nature, renewable, non-toxic and easy to produce.
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Affiliation(s)
- Jinyao Chen
- Key State Laboratory of Polymer Materials Engineering
- Polymer Research Institute of Sichuan University
- Chengdu 610065
- People's Republic of China
| | - Hao Zheng
- Key State Laboratory of Polymer Materials Engineering
- Polymer Research Institute of Sichuan University
- Chengdu 610065
- People's Republic of China
| | - Jian Kang
- Key State Laboratory of Polymer Materials Engineering
- Polymer Research Institute of Sichuan University
- Chengdu 610065
- People's Republic of China
| | - Feng Yang
- Key State Laboratory of Polymer Materials Engineering
- Polymer Research Institute of Sichuan University
- Chengdu 610065
- People's Republic of China
| | - Ya Cao
- Key State Laboratory of Polymer Materials Engineering
- Polymer Research Institute of Sichuan University
- Chengdu 610065
- People's Republic of China
| | - Ming Xiang
- Key State Laboratory of Polymer Materials Engineering
- Polymer Research Institute of Sichuan University
- Chengdu 610065
- People's Republic of China
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26
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Prasanna HN, Ramanjaneyulu G, Rajasekhar Reddy B. Optimization of cellulase production by Penicillium sp. 3 Biotech 2016; 6:162. [PMID: 28330234 PMCID: PMC4978645 DOI: 10.1007/s13205-016-0483-x] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Accepted: 08/01/2016] [Indexed: 12/01/2022] Open
Abstract
The production of cellulolytic enzymes (β-exoglucanase, β-endoglucanase and β-glucosidase) by Penicillium sp. on three different media in liquid shake culture conditions was compared. The organism exhibited relatively highest activity of endoglucanase among three enzymes measured at 7-day interval during the course of its growth on Czapek-Dox medium supplemented with 0.5 % (w/v) cellulose. Cellulose at 0.5 %, lactose at 0.5 %, sawdust at 0.5 %, yeast extract at 0.2 % as a nitrogen source, pH 5.0 and 30 °C temperature were found to be optimal for growth and cellulase production by Penicillium sp. Yields of Fpase, CMCase and β-glucosidase, attained on optimized medium with Penicillium sp. were 8.7, 25 and 9.52 U/ml, respectively with increment of 9.2, 5.9 and 43.8-folds over titers of the respective enzyme on unoptimised medium. Cellulase of the fungal culture with the ratio of β-glucosidase to Fpase greater than one will hold potential for biotechnological applications.
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Affiliation(s)
- H N Prasanna
- Department of Microbiology, Sri Krishnadevaraya University, Anantapuramu, Andhra Pradesh, India
| | - G Ramanjaneyulu
- Department of Microbiology, Sri Krishnadevaraya University, Anantapuramu, Andhra Pradesh, India
| | - B Rajasekhar Reddy
- Department of Microbiology, Sri Krishnadevaraya University, Anantapuramu, Andhra Pradesh, India.
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27
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Cannatelli MD, Ragauskas AJ. Conversion of lignin into value-added materials and chemicals via laccase-assisted copolymerization. Appl Microbiol Biotechnol 2016; 100:8685-91. [PMID: 27645296 DOI: 10.1007/s00253-016-7820-1] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2016] [Revised: 08/14/2016] [Accepted: 08/16/2016] [Indexed: 12/13/2022]
Abstract
With today's environmental concerns and the diminishing supply of the world's petroleum-based chemicals and materials, much focus has been directed toward alternative sources. Woody biomass presents a promising option due to its sheer abundance, renewability, and biodegradability. Lignin, a highly irregular polyphenolic compound, is one of the major chemical constituents of woody biomass and is the second most abundant biopolymer on Earth, surpassed only by cellulose. The pulp and paper and cellulosic ethanol industries produce lignin on the scale of millions of tons each year as a by-product. Traditionally, lignin has been viewed as a waste material and burned as an inefficient fuel. However, in recent decades, research has focused on more economical ways to convert lignin into value-added commodities, such as biofuels, biomaterials, and biochemicals, thus developing and strengthening the concept of fully integrated biorefineries. Owing to the phenolic structure of lignin, it is possible to enzymatically graft molecules onto its surface using laccases (benzenediol:oxygen oxidoreductases, EC 1.10.3.2) to create exciting novel biomaterials. These environmentally friendly enzymes use oxygen as their only co-substrate and produce water as their sole by-product, and have thus found great industrial application. This mini-review highlights recent advances in the field of laccase-facilitated functionalization of lignin as well as promising future directions for lignin-based polymers.
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Affiliation(s)
- Mark D Cannatelli
- Renewable Bioproducts Institute, School of Chemistry & Biochemistry, Georgia Institute of Technology, Atlanta, GA, 30332, USA
- Joint Institute for Biological Sciences, Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - Arthur J Ragauskas
- Renewable Bioproducts Institute, School of Chemistry & Biochemistry, Georgia Institute of Technology, Atlanta, GA, 30332, USA.
- Joint Institute for Biological Sciences, Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA.
- Department of Chemical & Biomolecular Engineering, University of Tennessee, Knoxville, TN, 37996, USA.
- Center for Renewable Carbon, Department of Forestry, Wildlife, and Fisheries, University of Tennessee Institute of Agriculture, Knoxville, TN, 37996, USA.
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28
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Lin L, Zhang L, Wang L, Li J. Energy harvesting from enzymatic biowaste reaction through polyelectrolyte functionalized 2D nanofluidic channels. Chem Sci 2016; 7:3645-3648. [PMID: 29997855 PMCID: PMC6008704 DOI: 10.1039/c5sc04634c] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Accepted: 02/04/2016] [Indexed: 11/21/2022] Open
Abstract
Effective recycling of biowaste energy in a compact system remains a great challenge. Here, we report a graphene-based energy harvesting system powered by enzymatic biowaste reaction through two-dimensional (2D) nanofluidic channels. The integrated 2D nanofluidic generator shows distinct advantages such as flexibility, low cost, and high output in ionic currents.
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Affiliation(s)
- Lei Lin
- Department of Chemistry , Beijing Key Laboratory for Analytical Methods and Instrumentation , Tsinghua University , Beijing 100084 , China .
| | - Ling Zhang
- Department of Chemistry , Beijing Key Laboratory for Analytical Methods and Instrumentation , Tsinghua University , Beijing 100084 , China .
| | - Lida Wang
- Department of Chemistry , Beijing Key Laboratory for Analytical Methods and Instrumentation , Tsinghua University , Beijing 100084 , China .
| | - Jinghong Li
- Department of Chemistry , Beijing Key Laboratory for Analytical Methods and Instrumentation , Tsinghua University , Beijing 100084 , China .
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29
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Ur-Rehman S, Mushtaq Z, Zahoor T, Jamil A, Murtaza MA. Xylitol: a review on bioproduction, application, health benefits, and related safety issues. Crit Rev Food Sci Nutr 2016; 55:1514-28. [PMID: 24915309 DOI: 10.1080/10408398.2012.702288] [Citation(s) in RCA: 91] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Xylitol is a pentahydroxy sugar-alcohol which exists in a very low quantity in fruits and vegetables (plums, strawberries, cauliflower, and pumpkin). On commercial scale, xylitol can be produced by chemical and biotechnological processes. Chemical production is costly and extensive in purification steps. However, biotechnological method utilizes agricultural and forestry wastes which offer the possibilities of economic production of xylitol by reducing required energy. The precursor xylose is produced from agricultural biomass by chemical and enzymatic hydrolysis and can be converted to xylitol primarily by yeast strain. Hydrolysis under acidic condition is the more commonly used practice influenced by various process parameters. Various fermentation process inhibitors are produced during chemical hydrolysis that reduce xylitol production, a detoxification step is, therefore, necessary. Biotechnological xylitol production is an integral process of microbial species belonging to Candida genus which is influenced by various process parameters such as pH, temperature, time, nitrogen source, and yeast extract level. Xylitol has application and potential for food and pharmaceutical industries. It is a functional sweetener as it has prebiotic effects which can reduce blood glucose, triglyceride, and cholesterol level. This review describes recent research developments related to bioproduction of xylitol from agricultural wastes, application, health, and safety issues.
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Affiliation(s)
- Salim Ur-Rehman
- a National Institute of Food Science & Technology, University of Agriculture , Faisalabad , 38040 , Pakistan
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30
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Choudhary R, Vecstaudza J, Krishnamurithy G, Raghavendran HRB, Murali MR, Kamarul T, Swamiappan S, Locs J. In-vitro bioactivity, biocompatibility and dissolution studies of diopside prepared from biowaste by using sol-gel combustion method. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 68:89-100. [PMID: 27524000 DOI: 10.1016/j.msec.2016.04.110] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Revised: 04/21/2016] [Accepted: 04/27/2016] [Indexed: 01/06/2023]
Abstract
Diopside was synthesized from biowaste (Eggshell) by sol-gel combustion method at low calcination temperature and the influence of two different fuels (urea, l-alanine) on the phase formation temperature, physical and biological properties of the resultant diopside was studied. The synthesized materials were characterized by heating microscopy, FTIR, XRD, BET, SEM and EDAX techniques. BET analysis reveals particles were of submicron size with porosity in the nanometer range. Bone-like apatite deposition ability of diopside scaffolds was examined under static and circulation mode of SBF (Simulated Body Fluid). It was noticed that diopside has the capability to deposit HAP (hydroxyapatite) within the early stages of immersion. ICP-OES analysis indicates release of Ca, Mg, Si ions and removal of P ions from the SBF, but in different quantities from diopside scaffolds. Cytocompatability studies on human bone marrow stromal cells (hBMSCs) revealed good cellular attachment on the surface of diopside scaffolds and formation of extracellular matrix (ECM). This study suggests that the usage of eggshell biowaste as calcium source provides an effective substitute for synthetic starting materials to fabricate bioproducts for biomedical applications.
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Affiliation(s)
- Rajan Choudhary
- Department of Chemistry, School of Advanced Sciences, VIT University, Vellore -632014, Tamil Nadu, India
| | - Jana Vecstaudza
- Rudolfs Cimdins Riga Biomaterials Innovations and Development Centre, Institute of General Chemical Engineering, Faculty of Materials Science and Applied Chemistry, Riga Technical University, Riga, Latvia
| | - G Krishnamurithy
- Tissue Engineering Group (TEG), Department of Orthopaedic Surgery (NOCERAL), Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Hanumantha Rao Balaji Raghavendran
- Tissue Engineering Group (TEG), Department of Orthopaedic Surgery (NOCERAL), Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Malliga Raman Murali
- Tissue Engineering Group (TEG), Department of Orthopaedic Surgery (NOCERAL), Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Tunku Kamarul
- Tissue Engineering Group (TEG), Department of Orthopaedic Surgery (NOCERAL), Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Sasikumar Swamiappan
- Department of Chemistry, School of Advanced Sciences, VIT University, Vellore -632014, Tamil Nadu, India.
| | - Janis Locs
- Rudolfs Cimdins Riga Biomaterials Innovations and Development Centre, Institute of General Chemical Engineering, Faculty of Materials Science and Applied Chemistry, Riga Technical University, Riga, Latvia
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31
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Sugano Y, Saloranta T, Bobacka J, Ivaska A. Electro-catalytic oxidation of hemicelluloses at the Au electrode. Phys Chem Chem Phys 2016; 17:11609-14. [PMID: 25866853 DOI: 10.1039/c4cp05800c] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The recently reported electro-catalytic reaction mechanism for the oxidation of cellulose is proposed to work also for the electro-oxidation of other polysaccharides (e.g. hemicelluloses). In this report, the electrochemical reactivity of some hemicelluloses (xylan, arabinoxylan, glucomannan, xyloglucan, and glucuronoxylan) in 1.3 M NaOH solution is described. The electrochemical property of each of the studied hemicelluloses at the Au electrode surface was characterized by cyclic voltammetry. Xylan, xyloglucan and glucuronoxylan were found to be electrochemically active. Electrochemical properties of xylan were further studied by electrochemical impedance spectroscopy. The electrochemical reaction products of xylan, obtained by extensive electrolysis of the xylan solution by cyclic voltammetry, were characterized by FTIR spectroscopy, (13)C-NMR spectroscopy, SEM and TEM. The structural studies suggest that the oxidized xylan is a functional material where some of the OH-groups have been oxidized to carboxyl groups making that part of the oxidation product soluble in water under ambient conditions (23 °C, pH 7). The other part remains insoluble in water and contains Au nanoparticles. This work indicates that other polysaccharides than cellulose can also be electrochemically oxidized.
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Affiliation(s)
- Yasuhito Sugano
- Laboratory of Analytical Chemistry, Johan Gadolin Process Chemistry Centre, Åbo Akademi University, FI-20500 Turku-Åbo, Finland.
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Álvarez C, Reyes-Sosa FM, Díez B. Enzymatic hydrolysis of biomass from wood. Microb Biotechnol 2016; 9:149-56. [PMID: 26833542 PMCID: PMC4767290 DOI: 10.1111/1751-7915.12346] [Citation(s) in RCA: 118] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2015] [Revised: 11/25/2015] [Accepted: 12/03/2015] [Indexed: 01/10/2023] Open
Abstract
Current research and development in cellulosic ethanol production has been focused mainly on agricultural residues and dedicated energy crops such as corn stover and switchgrass; however, woody biomass remains a very important feedstock for ethanol production. The precise composition of hemicellulose in the wood is strongly dependent on the plant species, therefore different types of enzymes are needed based on hemicellulose complexity and type of pretreatment. In general, hardwood species have much lower recalcitrance to enzymes than softwood. For hardwood, xylanases, beta‐xylosidases and xyloglucanases are the main hemicellulases involved in degradation of the hemicellulose backbone, while for softwood the effect of mannanases and beta‐mannosidases is more relevant. Furthermore, there are different key accessory enzymes involved in removing the hemicellulosic fraction and increasing accessibility of cellulases to the cellulose fibres improving the hydrolysis process. A diversity of enzymatic cocktails has been tested using from low to high densities of biomass (2–20% total solids) and a broad range of results has been obtained. The performance of recently developed commercial cocktails on hardwoods and softwoods will enable a further step for the commercialization of fuel ethanol from wood.
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Affiliation(s)
- Consolación Álvarez
- Department of Biotechnology, Abengoa Research, Campus Palmas Altas, C/Energía Solar no. 1, Seville, 41014, Spain
| | - Francisco Manuel Reyes-Sosa
- Department of Biotechnology, Abengoa Research, Campus Palmas Altas, C/Energía Solar no. 1, Seville, 41014, Spain
| | - Bruno Díez
- Department of Biotechnology, Abengoa Research, Campus Palmas Altas, C/Energía Solar no. 1, Seville, 41014, Spain
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Kameshwar AKS, Qin W. Recent Developments in Using Advanced Sequencing Technologies for the Genomic Studies of Lignin and Cellulose Degrading Microorganisms. Int J Biol Sci 2016; 12:156-71. [PMID: 26884714 PMCID: PMC4737673 DOI: 10.7150/ijbs.13537] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2015] [Accepted: 11/03/2015] [Indexed: 01/23/2023] Open
Abstract
Lignin is a complex polyphenyl aromatic compound which exists in tight associations with cellulose and hemicellulose to form plant primary and secondary cell wall. Lignocellulose is an abundant renewable biomaterial present on the earth. It has gained much attention in the scientific community in recent years because of its potential applications in bio-based industries. Microbial degradation of lignocellulose polymers was well studied in wood decaying fungi. Based on the plant materials they degrade these fungi were classified as white rot, brown rot and soft rot. However, some groups of bacteria belonging to the actinomycetes, α-proteobacteria and β-proteobacteria were also found to be efficient in degrading lignocellulosic biomass but not well understood unlike the fungi. In this review we focus on recent advancements deployed for finding and understanding the lignocellulose degradation by microorganisms. Conventional molecular methods like sequencing 16s rRNA and Inter Transcribed Spacer (ITS) regions were used for identification and classification of microbes. Recent progression in genomics mainly next generation sequencing technologies made the whole genome sequencing of microbes possible in a great ease. The whole genome sequence studies reveals high quality information about genes and canonical pathways involved in the lignin and other cell wall components degradation.
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Affiliation(s)
| | - Wensheng Qin
- Department of Biology, Lakehead University, 955 Oliver Road, Thunder Bay, Ontario, P7B 5E1, Canada
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Oshoma CE, Greetham D, Louis EJ, Smart KA, Phister TG, Powell C, Du C. Screening of Non- Saccharomyces cerevisiae Strains for Tolerance to Formic Acid in Bioethanol Fermentation. PLoS One 2015; 10:e0135626. [PMID: 26284784 PMCID: PMC4540574 DOI: 10.1371/journal.pone.0135626] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2015] [Accepted: 07/24/2015] [Indexed: 11/18/2022] Open
Abstract
Formic acid is one of the major inhibitory compounds present in hydrolysates derived from lignocellulosic materials, the presence of which can significantly hamper the efficiency of converting available sugars into bioethanol. This study investigated the potential for screening formic acid tolerance in non-Saccharomyces cerevisiae yeast strains, which could be used for the development of advanced generation bioethanol processes. Spot plate and phenotypic microarray methods were used to screen the formic acid tolerance of 7 non-Saccharomyces cerevisiae yeasts. S. kudriavzeii IFO1802 and S. arboricolus 2.3319 displayed a higher formic acid tolerance when compared to other strains in the study. Strain S. arboricolus 2.3319 was selected for further investigation due to its genetic variability among the Saccharomyces species as related to Saccharomyces cerevisiae and availability of two sibling strains: S. arboricolus 2.3317 and 2.3318 in the lab. The tolerance of S. arboricolus strains (2.3317, 2.3318 and 2.3319) to formic acid was further investigated by lab-scale fermentation analysis, and compared with S. cerevisiae NCYC2592. S. arboricolus 2.3319 demonstrated improved formic acid tolerance and a similar bioethanol synthesis capacity to S. cerevisiae NCYC2592, while S. arboricolus 2.3317 and 2.3318 exhibited an overall inferior performance. Metabolite analysis indicated that S. arboricolus strain 2.3319 accumulated comparatively high concentrations of glycerol and glycogen, which may have contributed to its ability to tolerate high levels of formic acid.
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Affiliation(s)
- Cyprian E. Oshoma
- Bioenergy and Brewing Science Building, School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, Leics, United Kingdom
| | - Darren Greetham
- Bioenergy and Brewing Science Building, School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, Leics, United Kingdom
| | - Edward J. Louis
- Centre for Genetic Architecture of Complex Traits, University of Leicester, Leicester, United Kingdom
| | | | - Trevor G. Phister
- PepsiCo Int. Beaumont Park, Leycroft Road, Leicester, United Kingdom
| | - Chris Powell
- Bioenergy and Brewing Science Building, School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, Leics, United Kingdom
| | - Chenyu Du
- Bioenergy and Brewing Science Building, School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, Leics, United Kingdom
- School of Applied Sciences, University of Huddersfield, Queensgate, Huddersfield, United Kingdom
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35
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Xue DS, Wang JB, Yao SJ. High production of β-glucosidase from a marine Aspergillus niger immobilized on towel gourd vegetable sponges. CHINESE CHEM LETT 2015. [DOI: 10.1016/j.cclet.2015.05.019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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36
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Figueiredo MC, Solla-Gullón J, Vidal-Iglesias FJ, Nisula M, Feliu JM, Kallio T. Carbon-supported shape-controlled Pt nanoparticle electrocatalysts for direct alcohol fuel cells. Electrochem commun 2015. [DOI: 10.1016/j.elecom.2015.03.019] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Kreyenschulte D, Paciok E, Regestein L, Blümich B, Büchs J. Online monitoring of fermentation processes via non-invasive low-field NMR. Biotechnol Bioeng 2015; 112:1810-21. [DOI: 10.1002/bit.25599] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Accepted: 03/03/2015] [Indexed: 11/06/2022]
Affiliation(s)
- Dirk Kreyenschulte
- AVT - Biochemical Engineering; RWTH Aachen University; Worringer Weg 1 52074 Aachen Germany
| | - Eva Paciok
- Institute for Technical Chemistry and Macromolecular Chemistry; RWTH Aachen University; Aachen Germany
| | - Lars Regestein
- AVT - Biochemical Engineering; RWTH Aachen University; Worringer Weg 1 52074 Aachen Germany
| | - Bernhard Blümich
- Institute for Technical Chemistry and Macromolecular Chemistry; RWTH Aachen University; Aachen Germany
| | - Jochen Büchs
- AVT - Biochemical Engineering; RWTH Aachen University; Worringer Weg 1 52074 Aachen Germany
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Tai C, Keshwani DR, Voltan DS, Kuhar PS, Engel AJ. Optimal control strategy for fed-batch enzymatic hydrolysis of lignocellulosic biomass based on epidemic modeling. Biotechnol Bioeng 2015; 112:1376-82. [DOI: 10.1002/bit.25552] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2014] [Revised: 01/14/2015] [Accepted: 01/21/2015] [Indexed: 11/07/2022]
Affiliation(s)
- Chao Tai
- Department of Biological Systems Engineering; University of Nebraska-Lincoln; Lincoln Nebraska 68583
| | - Deepak R. Keshwani
- Department of Biological Systems Engineering; University of Nebraska-Lincoln; Lincoln Nebraska 68583
| | - Diego S. Voltan
- Department of Biological Systems Engineering; University of Nebraska-Lincoln; Lincoln Nebraska 68583
- Department of Rural Engineering; College of Agricultural Sciences; São Paulo State University; Botucatu SP 18610-307 Brazil
- CAPES Foundation; Ministry of Education of Brazil; Brasília DF 70040-020 Brazil
| | - Pankaj S. Kuhar
- Department of Biological Systems Engineering; University of Nebraska-Lincoln; Lincoln Nebraska 68583
| | - Aaron J. Engel
- Department of Biological Systems Engineering; University of Nebraska-Lincoln; Lincoln Nebraska 68583
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Porsch K, Wirth B, Tóth EM, Schattenberg F, Nikolausz M. Characterization of wheat straw-degrading anaerobic alkali-tolerant mixed cultures from soda lake sediments by molecular and cultivation techniques. Microb Biotechnol 2015; 8:801-14. [PMID: 25737100 PMCID: PMC4554468 DOI: 10.1111/1751-7915.12272] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2014] [Revised: 01/31/2015] [Accepted: 02/03/2015] [Indexed: 11/29/2022] Open
Abstract
Alkaline pretreatment has the potential to enhance the anaerobic digestion of lignocellulosic biomass to biogas. However, the elevated pH of the substrate may require alkalitolerant microbial communities for an effective digestion. Three mixed anaerobic lignocellulolytic cultures were enriched from sediments from two soda lakes with wheat straw as substrate under alkaline (pH 9) mesophilic (37°C) and thermophilic (55°C) conditions. The gas production of the three cultures ceased after 4 to 5 weeks, and the produced gas was composed of carbon dioxide and methane. The main liquid intermediates were acetate and propionate. The physiological behavior of the cultures was stable even after several transfers. The enrichment process was also followed by molecular fingerprinting (terminal restriction fragment length polymorphism) of the bacterial 16S rRNA gene and of the mcrA/mrtA functional gene for methanogens. The main shift in the microbial community composition occurred between the sediment samples and the first enrichment, whereas the structure was stable in the following transfers. The bacterial communities mainly consisted of Sphingobacteriales, Clostridiales and Spirochaeta, but differed at genus level. Methanothermobacter and Methanosarcina genera and the order Methanomicrobiales were predominant methanogenes in the obtained cultures. Additionally, single cellulolytic microorganisms were isolated from enrichment cultures and identified as members of the alkaliphilic or alkalitolerant genera. The results show that anaerobic alkaline habitats harbor diverse microbial communities, which can degrade lignocellulose effectively and are therefore a potential resource for improving anaerobic digestion.
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Affiliation(s)
- Katharina Porsch
- Department of Bioenergy, Helmholtz Centre for Environmental Research - UFZ, Leipzig, Germany.,Department of Environmental Microbiology, Helmholtz Centre for Environmental Research - UFZ, Leipzig, Germany
| | - Balázs Wirth
- Department of Microbiology, Eötvös Loránd University, Budapest, Hungary
| | - Erika M Tóth
- Department of Microbiology, Eötvös Loránd University, Budapest, Hungary
| | - Florian Schattenberg
- Department of Bioenergy, Helmholtz Centre for Environmental Research - UFZ, Leipzig, Germany.,Department of Environmental Microbiology, Helmholtz Centre for Environmental Research - UFZ, Leipzig, Germany
| | - Marcell Nikolausz
- Department of Bioenergy, Helmholtz Centre for Environmental Research - UFZ, Leipzig, Germany.,Department of Environmental Microbiology, Helmholtz Centre for Environmental Research - UFZ, Leipzig, Germany
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40
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Salek S, van Turnhout A, Kleerebezem R, van Loosdrecht M. pH control in biological systems using calcium carbonate. Biotechnol Bioeng 2015; 112:905-13. [DOI: 10.1002/bit.25506] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2014] [Revised: 11/17/2014] [Accepted: 11/19/2014] [Indexed: 11/12/2022]
Affiliation(s)
- S.S. Salek
- Department of Biotechnology; Delft University of Technology; Julianalaan 67 2628BC Delft The Netherlands
| | - A.G. van Turnhout
- Department of Geoscience and Engineering; Geo-engineering; Stevinweg 1 2628CN Delft The Netherlands
| | - R. Kleerebezem
- Department of Biotechnology; Delft University of Technology; Julianalaan 67 2628BC Delft The Netherlands
| | - M.C.M. van Loosdrecht
- Department of Biotechnology; Delft University of Technology; Julianalaan 67 2628BC Delft The Netherlands
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41
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A D, Hegde G. Activated carbon nanospheres derived from bio-waste materials for supercapacitor applications – a review. RSC Adv 2015. [DOI: 10.1039/c5ra19392c] [Citation(s) in RCA: 141] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Supercapacitors are perfect energy storage devices; they can be charged almost instantly and release energy over a long time.
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Affiliation(s)
- Divyashree A
- BMS R and D Centre
- BMS College of Engineering
- Bangalore
- India
- Sai Vidya Institute of Technology
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42
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Zhou Y, Yang D, Zeng Y, Zhou Y, Ng WJ, Yan Q, Fong E. Recycling bacteria for the synthesis of LiMPO4 (M = Fe, Mn) nanostructures for high-power lithium batteries. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2014; 10:3997-4002. [PMID: 24930375 DOI: 10.1002/smll.201400568] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2014] [Revised: 05/10/2014] [Indexed: 06/03/2023]
Abstract
In this work, a novel waste-to-resource strategy to convert waste bacteria into a useful class of cathode materials, lithium metal phosphate (LiMPO4; M = Fe, Mn), is presented. Escherichia coli (E. coli) bacteria used for removing phosphorus contamination from wastewater are harvested and used as precursors for the synthesis of LiMPO4. After annealing, LiFePO4 and LiMnPO4 nanoparticles with dimensions around 20 nm are obtained. These particles are found to be enveloped in a carbon layer with a thickness around 3-5 nm, generated through the decomposition of the organic matter from the bacterial cell cytoplasm. The battery performance for the LiFePO4 is evaluated. A high discharge capacity of 140 mAh g(-1) at 0.1 C with a flat plateau located at around 3.5 V is obtained. In addition, the synthesized particles display excellent stability and rate capabilities. Even under a high C rate of 10 C, a stable discharge capacity of 75.4 mAh g(-1) can still be achieved.
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Affiliation(s)
- Yanping Zhou
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798; Advanced Environmental Biotechnology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 CleanTech Loop, Singapore, 637141
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44
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Tai C, Arellano MG, Keshwani DR. Epidemic based modeling of enzymatic hydrolysis of lignocellulosic biomass. Biotechnol Prog 2014; 30:1021-8. [PMID: 25079785 DOI: 10.1002/btpr.1960] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2014] [Revised: 06/06/2014] [Indexed: 11/08/2022]
Abstract
An epidemic based model was developed to describe the enzymatic hydrolysis of a lignocellulosic biomass, dilute sulfuric acid pretreated corn stover. The process of substrate getting adsorbed and digested by enzyme was simulated as susceptibles getting infected by viruses and becoming removed and recovered. This model simplified the dynamic enzyme "infection" process and the catalysis of cellulose into a two-parameter controlled, enzyme behavior guided mechanism. Furthermore, the model incorporates the adsorption block by lignin and inhibition effects on cellulose catalysis. The model satisfactorily predicted the enzyme adsorption and hydrolysis, negative role of lignin, and inhibition effects over hydrolysis for a broad range of substrate and enzyme loadings. Sensitivity analysis was performed to evaluate the incorporation of lignin and other inhibition effects. Our model will be a useful tool for evaluating the effects of parameters during hydrolysis and guide a design strategy for continuous hydrolysis and the associated process control.
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Affiliation(s)
- Chao Tai
- Dept. of Biological Systems Engineering, University of Nebraska-Lincoln, Lincoln, NE, 68583
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45
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Mushtaq Z, Imran M, Zahoor T, Ahmad RS, Arshad MU. Biochemical perspectives of xylitol extracted from indigenous agricultural by-product mung bean (Vigna radiata) hulls in a rat model. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2014; 94:969-974. [PMID: 24757723 DOI: 10.1002/jsfa.6346] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
BACKGROUND The production of xylitol from lignocellulosic material is of great interest around the world. It can be used as bulk sweetener and its possible lower energy value has increased acceptance for discerning consumers. Xylitol was produced from indigenous agricultural by-product (mung bean hulls) through Candida tropicalis fermentation. Further, xylitol incorporation at different concentrations (0, 100 and 200 g kg⁻¹) was carried out with the purpose of appraising the suitability and claimed health benefits of this dietetic ingredient in food products. Asserted biochemical perspectives of the xylitol intake were evaluated through biological studies for normal and streptozotocin-induced diabetic rats. RESULTS The addition of xylitol significantly affected feed intake, weight gain, liver and cecum weight in both normal and diabetic rats. The biochemical profile of serum was improved with xylitol incorporation in the diet. Serum glucose, cholesterol and triglycerides levels were decreased depending on xylitol intake level. CONCLUSION The results of the present study demonstrated that mung bean hulls have high potential as a new feedstock for xylitol production. In addressing the current concerns of obesity and diabetes, xylitol extracted from such agricultural waste should be considered in diet-based therapies for weight loss programmes.
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46
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Bosmans TJ, Stépán AM, Toriz G, Renneckar S, Karabulut E, Wågberg L, Gatenholm P. Assembly of Debranched Xylan from Solution and on Nanocellulosic Surfaces. Biomacromolecules 2014; 15:924-30. [DOI: 10.1021/bm4017868] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | | | - Guillermo Toriz
- Department
of Wood, Cellulose and Paper Research, University of Guadalajara, Guadalajara 44100, Mexico
| | - Scott Renneckar
- Department
of Sustainable Biomaterials, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Erdem Karabulut
- Fibre
and Polymer Technology, Royal Institute of Technology, Stockholm 100 44, Sweden
| | - Lars Wågberg
- Fibre
and Polymer Technology, Royal Institute of Technology, Stockholm 100 44, Sweden
- Wallenberg
Wood Science Center, KTH Royal Institute of Technology, Stockholm 100 44, Sweden
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47
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Buffington J. The Economic Potential of Brewer’s Spent Grain (BSG) as a Biomass Feedstock. ACTA ACUST UNITED AC 2014. [DOI: 10.4236/aces.2014.43034] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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48
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Abou-Dobara MI, Omar NF. Poly R decolorization and APPL production by Streptomyces violaceoruber and Streptomyces spiroverticillatus. Braz J Microbiol 2014; 45:1179-86. [PMID: 25763021 PMCID: PMC4323290 DOI: 10.1590/s1517-83822014000400008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2013] [Accepted: 04/17/2014] [Indexed: 11/21/2022] Open
Abstract
Two mesophilic streptomycetes (S. violaceoruber and S. spiroverticillatus) were selected to study their Poly R-478 decolorization ability and lignocellulose solubilizing activity. Both strains were able to degrade Poly R-478 dye and ferulic acid during growth on a minimal salts medium. The Poly R-478 decolorizing activities of both strains were induced by adding different carbon sources to the culture media. S. violaceoruber could decolorize 63% of Poly R-478 after 24 h. Both strains could solubilize straw and produce acid-precipitable polymeric lignin (APPL) with different efficiency. From the major extracellular enzymes recovery of both strains on rice and wheat straw, we can predicate that the biodegradation process was partial indicating a possible utilization in biological delignification.
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Affiliation(s)
- M I Abou-Dobara
- Botany Department Faculty of Science Damietta University Damietta Egypt Botany Department, Faculty of Science, Damietta University, Damietta, Egypt
| | - N F Omar
- Botany Department Faculty of Science Damietta University Damietta Egypt Botany Department, Faculty of Science, Damietta University, Damietta, Egypt
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49
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Choi HJ, Montemagno CD. Recent Progress in Advanced Nanobiological Materials for Energy and Environmental Applications. MATERIALS 2013; 6:5821-5856. [PMID: 28788424 PMCID: PMC5452742 DOI: 10.3390/ma6125821] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/25/2013] [Revised: 11/26/2013] [Accepted: 11/28/2013] [Indexed: 11/25/2022]
Abstract
In this review, we briefly introduce our efforts to reconstruct cellular life processes by mimicking natural systems and the applications of these systems to energy and environmental problems. Functional units of in vitro cellular life processes are based on the fabrication of artificial organelles using protein-incorporated polymersomes and the creation of bioreactors. This concept of an artificial organelle originates from the first synthesis of poly(siloxane)-poly(alkyloxazoline) block copolymers three decades ago and the first demonstration of protein activity in the polymer membrane a decade ago. The increased value of biomimetic polymers results from many research efforts to find new applications such as functionally active membranes and a biochemical-producing polymersome. At the same time, foam research has advanced to the point that biomolecules can be efficiently produced in the aqueous channels of foam. Ongoing research includes replication of complex biological processes, such as an artificial Calvin cycle for application in biofuel and specialty chemical production, and carbon dioxide sequestration. We believe that the development of optimally designed biomimetic polymers and stable/biocompatible bioreactors would contribute to the realization of the benefits of biomimetic systems. Thus, this paper seeks to review previous research efforts, examine current knowledge/key technical parameters, and identify technical challenges ahead.
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Affiliation(s)
- Hyo-Jick Choi
- National Institute for Nanotechnology and Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB T6G 2M9, Canada.
| | - Carlo D Montemagno
- National Institute for Nanotechnology and Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB T6G 2M9, Canada.
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50
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Díaz-Malváez F, García-Almendárez B, Hernández-Arana A, Amaro-Reyes A, Regalado-González C. Isolation and properties of β-xylosidase from Aspergillus niger GS1 using corn pericarp upon solid state fermentation. Process Biochem 2013. [DOI: 10.1016/j.procbio.2013.05.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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