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Choi J, Kim H, Ahn YR, Kim M, Yu S, Kim N, Lim SY, Park JA, Ha SJ, Lim KS, Kim HO. Recent advances in microbial and enzymatic engineering for the biodegradation of micro- and nanoplastics. RSC Adv 2024; 14:9943-9966. [PMID: 38528920 PMCID: PMC10961967 DOI: 10.1039/d4ra00844h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2024] [Accepted: 03/19/2024] [Indexed: 03/27/2024] Open
Abstract
This review examines the escalating issue of plastic pollution, specifically highlighting the detrimental effects on the environment and human health caused by microplastics and nanoplastics. The extensive use of synthetic polymers such as polyethylene (PE), polyethylene terephthalate (PET), and polystyrene (PS) has raised significant environmental concerns because of their long-lasting and non-degradable characteristics. This review delves into the role of enzymatic and microbial strategies in breaking down these polymers, showcasing recent advancements in the field. The intricacies of enzymatic degradation are thoroughly examined, including the effectiveness of enzymes such as PETase and MHETase, as well as the contribution of microbial pathways in breaking down resilient polymers into more benign substances. The paper also discusses the impact of chemical composition on plastic degradation kinetics and emphasizes the need for an approach to managing the environmental impact of synthetic polymers. The review highlights the significance of comprehending the physical characteristics and long-term impacts of micro- and nanoplastics in different ecosystems. Furthermore, it points out the environmental and health consequences of these contaminants, such as their ability to cause cancer and interfere with the endocrine system. The paper emphasizes the need for advanced analytical methods and effective strategies for enzymatic degradation, as well as continued research and development in this area. This review highlights the crucial role of enzymatic and microbial strategies in addressing plastic pollution and proposes methods to create effective and environmentally friendly solutions.
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Affiliation(s)
- Jaewon Choi
- Division of Chemical Engineering and Bioengineering, College of Art, Culture and Engineering, Kangwon National University Chuncheon Korea
- Department of Smart Health Science and Technology, Kangwon National University Chuncheon Korea
| | - Hongbin Kim
- Division of Chemical Engineering and Bioengineering, College of Art, Culture and Engineering, Kangwon National University Chuncheon Korea
- Department of Smart Health Science and Technology, Kangwon National University Chuncheon Korea
| | - Yu-Rim Ahn
- Division of Chemical Engineering and Bioengineering, College of Art, Culture and Engineering, Kangwon National University Chuncheon Korea
- Department of Smart Health Science and Technology, Kangwon National University Chuncheon Korea
| | - Minse Kim
- Division of Chemical Engineering and Bioengineering, College of Art, Culture and Engineering, Kangwon National University Chuncheon Korea
- Department of Smart Health Science and Technology, Kangwon National University Chuncheon Korea
| | - Seona Yu
- Division of Chemical Engineering and Bioengineering, College of Art, Culture and Engineering, Kangwon National University Chuncheon Korea
- Department of Smart Health Science and Technology, Kangwon National University Chuncheon Korea
| | - Nanhyeon Kim
- Division of Chemical Engineering and Bioengineering, College of Art, Culture and Engineering, Kangwon National University Chuncheon Korea
- Department of Smart Health Science and Technology, Kangwon National University Chuncheon Korea
| | - Su Yeon Lim
- Division of Chemical Engineering and Bioengineering, College of Art, Culture and Engineering, Kangwon National University Chuncheon Korea
- Department of Smart Health Science and Technology, Kangwon National University Chuncheon Korea
| | - Jeong-Ann Park
- Department of Environmental Engineering, Kangwon National University Chuncheon 24341 Republic of Korea
| | - Suk-Jin Ha
- Division of Chemical Engineering and Bioengineering, College of Art, Culture and Engineering, Kangwon National University Chuncheon Korea
- Department of Smart Health Science and Technology, Kangwon National University Chuncheon Korea
| | - Kwang Suk Lim
- Division of Chemical Engineering and Bioengineering, College of Art, Culture and Engineering, Kangwon National University Chuncheon Korea
- Department of Smart Health Science and Technology, Kangwon National University Chuncheon Korea
| | - Hyun-Ouk Kim
- Division of Chemical Engineering and Bioengineering, College of Art, Culture and Engineering, Kangwon National University Chuncheon Korea
- Department of Smart Health Science and Technology, Kangwon National University Chuncheon Korea
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Simon J, Schlapp-Hackl I, Sapkota J, Ristolainen M, Rosenau T, Potthast A. Towards Tailored Dialdehyde Cellulose Derivatives: A Strategy for Tuning the Glass Transition Temperature. CHEMSUSCHEM 2024; 17:e202300791. [PMID: 37923704 DOI: 10.1002/cssc.202300791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 11/03/2023] [Accepted: 11/03/2023] [Indexed: 11/07/2023]
Abstract
The derivatization of dialdehyde cellulose (DAC) has received increasing attention in the development of sustainable thermoplastics. In this study, a series of dialcohol celluloses were generated by borohydride reduction, which exhibited glass transition temperature (Tg ) values ranging from 23 to 109 °C, depending on the initial degree of oxidation (DO) of the DAC intermediate. However, the DAC derivatives did not exhibit thermoplastic behavior when the DO of the modified DAC was below 26 %. The influence of introduced side chains was highlighted by comparing DAC-based thermoplastic materials obtained by either oximation or borohydride reduction. Our results provide insights into the generation of DAC-based thermoplastics and highlight a strategy for tailoring the Tg by adjusting the DO during the periodate oxidation step and selecting appropriate substituents in subsequent modifications.
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Affiliation(s)
- Jonas Simon
- Department of Chemistry, Institute of Chemistry of Renewable Resources, University of Natural Resources and Life Sciences Vienna (BOKU), Konrad-Lorenz-Strasse 24, 3430, Tulln, Austria
| | - Inge Schlapp-Hackl
- Department of Bioproducts and Biosystems, Aalto University, FI-00076, Aalto, Finland
| | - Janak Sapkota
- NE Research Center, UPM Pulp Research and Innovations, 53200, Lappeenranta, Finland
| | - Matti Ristolainen
- NE Research Center, UPM Pulp Research and Innovations, 53200, Lappeenranta, Finland
| | - Thomas Rosenau
- Department of Chemistry, Institute of Chemistry of Renewable Resources, University of Natural Resources and Life Sciences Vienna (BOKU), Konrad-Lorenz-Strasse 24, 3430, Tulln, Austria
| | - Antje Potthast
- Department of Chemistry, Institute of Chemistry of Renewable Resources, University of Natural Resources and Life Sciences Vienna (BOKU), Konrad-Lorenz-Strasse 24, 3430, Tulln, Austria
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3
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Nitta KH, Ito K, Ito A. A Phenomenological Model for Enthalpy Recovery in Polystyrene Using Dynamic Mechanical Spectra. Polymers (Basel) 2023; 15:3590. [PMID: 37688216 PMCID: PMC10490033 DOI: 10.3390/polym15173590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2023] [Revised: 08/25/2023] [Accepted: 08/26/2023] [Indexed: 09/10/2023] Open
Abstract
This paper studies the effects of annealing time on the specific heat enthalpy of polystyrene above the glass transition temperature. We extend the Tool-Narayanaswamy-Moynihan (TNM) model to describe the endothermic overshoot peaks through the dynamic mechanical spectra. In this work, we accept the viewpoint that the enthalpy recovery behavior of glassy polystyrene (PS) has a common structural relaxation mode with linear viscoelastic behavior. As a consequence, the retardation spectrum evaluated from the dynamic mechanical spectra around the primary Tg peak is used as the recovery function of the endothermic overshoot of specific heat. In addition, the sub-Tg shoulder peak around the Tg peak is found to be related to the structural relaxation estimated from light scattering measurements. The enthalpy recovery of annealed PS is quantitatively described using retardation spectra of the primary Tg, as well as the kinetic process of the sub-Tg relaxation process.
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Affiliation(s)
- Koh-hei Nitta
- Division of Material Sciences, Graduate School of Natural Science and Technology, Kanazawa University, Kakuma Campus, Kanazawa 920-1192, Japan (A.I.)
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4
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Baldanza A, Loianno V, Mensitieri G, Scherillo G. Modelling changes in glass transition temperature in polymer matrices exposed to low molecular weight penetrants. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2023; 381:20210216. [PMID: 36403634 DOI: 10.1098/rsta.2021.0216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Accepted: 06/13/2022] [Indexed: 06/16/2023]
Abstract
Polymer matrices, when placed in contact with a fluid phase made of low molecular weight compounds, undergo a depression of their glass transition temperature (Tg) determined by the absorption of these compounds and the associated plasticization phenomena. Frequently, this effect is coupled with the mechanical action of the compressive stress exerted by the pressure of the fluid phase that, in contrast, promotes an increase in the Tg. This issue is relevant for technological and structural applications of composites with high-performance glassy polymer matrices, due to their significant impact on mechanical properties. We propose an approach to model and predict rubbery-glassy states maps of polymer-penetrant mixtures as a function of pressure and temperature based on the Gibbs-Di Marzio criterion. This criterion establishes that a 'thermodynamic' glass transition does occur when the configurational entropy of the system vanishes. Although questioned and criticized, this criterion constitutes a good practical approach to analyse changes of Tg and, in some way, reflects the idea of an 'entropy catastrophe' occurring at the glass transition. Several polymer-penetrant systems have been analysed modelling configurational entropy by means of the Non-Random Hydrogen Bond lattice fluid theory, able to cope with possible non-random mixing and occurrence of strong interactions. This article is part of the theme issue 'Ageing and durability of composite materials'.
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Affiliation(s)
- Antonio Baldanza
- Department of Chemical, Materials and Production Engineering, University of Naples Federico II, P.le Tecchio 80, Naples 80125, Italy
| | - Valerio Loianno
- Department of Chemical, Materials and Production Engineering, University of Naples Federico II, P.le Tecchio 80, Naples 80125, Italy
| | - Giuseppe Mensitieri
- Department of Chemical, Materials and Production Engineering, University of Naples Federico II, P.le Tecchio 80, Naples 80125, Italy
| | - Giuseppe Scherillo
- Department of Chemical, Materials and Production Engineering, University of Naples Federico II, P.le Tecchio 80, Naples 80125, Italy
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5
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Branson Y, Badenhorst CPS, Pfaff L, Buchmann C, Wei R, Bornscheuer UT. High-Throughput Screening for Thermostable Polyester Hydrolases. Methods Mol Biol 2023; 2555:153-165. [PMID: 36306085 DOI: 10.1007/978-1-0716-2795-2_11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Due to the promise of more sustainable recycling of plastics through biocatalytic degradation, the search for and engineering of polyester hydrolases have become a thriving field of research. Furthermore, among other methods, halo formation assays have become popular for the detection of polyester-hydrolase activity. However, established halo-formation assays are limited in their ability to screen for thermostable enzymes, which are particularly important for efficient plastic degradation. The incubation of screening plates at temperatures above 50 °C leads to cell lysis and death. Therefore, equivalent master plates are commonly required to maintain and identify the active strains found on the screening plates. This replica plating procedure necessitates 20- to 60-fold more plates than our method, assuming the screened library is transferred to 384-well microtiter plates or 96-well microtiter plates, respectively, to organize the colonies in a retraceable manner, thus significantly lowering throughput. Here, we describe a halo formation assay that is designed to screen thermostable polyesterases independent of master plates and colony replication, thereby markedly reducing the workload and increasing the throughput.
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Affiliation(s)
- Yannick Branson
- Department of Biotechnology & Enzyme Catalysis, Institute of Biochemistry, University of Greifswald, Greifswald, Germany
| | - Christoffel P S Badenhorst
- Department of Biotechnology & Enzyme Catalysis, Institute of Biochemistry, University of Greifswald, Greifswald, Germany
| | - Lara Pfaff
- Department of Biotechnology & Enzyme Catalysis, Institute of Biochemistry, University of Greifswald, Greifswald, Germany
| | - Carolin Buchmann
- Department of Biotechnology & Enzyme Catalysis, Institute of Biochemistry, University of Greifswald, Greifswald, Germany
| | - Ren Wei
- Department of Biotechnology & Enzyme Catalysis, Institute of Biochemistry, University of Greifswald, Greifswald, Germany.
| | - Uwe T Bornscheuer
- Department of Biotechnology & Enzyme Catalysis, Institute of Biochemistry, University of Greifswald, Greifswald, Germany.
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6
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Roy H, Nayak BS, Maddiboyina B, Nandi S. Chitosan based urapidil microparticle development in approach to improve mechanical strength by cold hyperosmotic dextrose solution technique. J Drug Deliv Sci Technol 2022. [DOI: 10.1016/j.jddst.2022.103745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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7
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Sonnendecker C, Oeser J, Richter PK, Hille P, Zhao Z, Fischer C, Lippold H, Blázquez‐Sánchez P, Engelberger F, Ramírez‐Sarmiento CA, Oeser T, Lihanova Y, Frank R, Jahnke H, Billig S, Abel B, Sträter N, Matysik J, Zimmermann W. Low Carbon Footprint Recycling of Post-Consumer PET Plastic with a Metagenomic Polyester Hydrolase. CHEMSUSCHEM 2022; 15:e202101062. [PMID: 34129279 PMCID: PMC9303343 DOI: 10.1002/cssc.202101062] [Citation(s) in RCA: 36] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Revised: 06/14/2021] [Indexed: 06/01/2023]
Abstract
Earth is flooded with plastics and the need for sustainable recycling strategies for polymers has become increasingly urgent. Enzyme-based hydrolysis of post-consumer plastic is an emerging strategy for closed-loop recycling of polyethylene terephthalate (PET). The polyester hydrolase PHL7, isolated from a compost metagenome, completely hydrolyzes amorphous PET films, releasing 91 mg of terephthalic acid per hour and mg of enzyme. Vertical scanning interferometry shows degradation rates of the PET film of 6.8 μm h-1 . Structural analysis indicates the importance of leucine at position 210 for the extraordinarily high PET-hydrolyzing activity of PHL7. Within 24 h, 0.6 mgenzyme gPET -1 completely degrades post-consumer thermoform PET packaging in an aqueous buffer at 70 °C without any energy-intensive pretreatments. Terephthalic acid recovered from the enzymatic hydrolysate is then used to synthesize virgin PET, demonstrating the potential of polyester hydrolases as catalysts in sustainable PET recycling processes with a low carbon footprint.
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Affiliation(s)
| | - Juliane Oeser
- Department of Microbiology and Bioprocess Technology Institute of BiochemistryLeipzig University04103LeipzigGermany
| | - P. Konstantin Richter
- Institute of Bioanalytical Chemistry, Centre for Biotechnology and BiomedicineLeipzig University04103LeipzigGermany
| | - Patrick Hille
- Department of Microbiology and Bioprocess Technology Institute of BiochemistryLeipzig University04103LeipzigGermany
| | - Ziyue Zhao
- Institute of Analytical ChemistryLeipzig University04103LeipzigGermany
| | - Cornelius Fischer
- Helmholtz-Zentrum Dresden-Rossendorf (HZDR)Institut für Ressourcenökologie Abteilung Reaktiver TransportD-04318LeipzigGermany
| | - Holger Lippold
- Helmholtz-Zentrum Dresden-Rossendorf (HZDR)Institut für Ressourcenökologie Abteilung Reaktiver TransportD-04318LeipzigGermany
| | - Paula Blázquez‐Sánchez
- Institute for Biological and Medical Engineering Schools of Engineering, Medicine and Biological SciencesPontificia Universidad Católica de ChileSantiago7820436Chile
- ANID—Millennium Science Initiative ProgramMillennium Institute for Integrative Biology (iBio)Santiago8331150Chile
| | - Felipe Engelberger
- Institute for Biological and Medical Engineering Schools of Engineering, Medicine and Biological SciencesPontificia Universidad Católica de ChileSantiago7820436Chile
- ANID—Millennium Science Initiative ProgramMillennium Institute for Integrative Biology (iBio)Santiago8331150Chile
| | - César A. Ramírez‐Sarmiento
- Institute for Biological and Medical Engineering Schools of Engineering, Medicine and Biological SciencesPontificia Universidad Católica de ChileSantiago7820436Chile
- ANID—Millennium Science Initiative ProgramMillennium Institute for Integrative Biology (iBio)Santiago8331150Chile
| | - Thorsten Oeser
- Department of Microbiology and Bioprocess Technology Institute of BiochemistryLeipzig University04103LeipzigGermany
| | - Yuliia Lihanova
- Institute of Analytical ChemistryLeipzig University04103LeipzigGermany
| | - Ronny Frank
- Centre for Biotechnology and Biomedicine Molecular Biological-Biochemical Processing TechnologyLeipzig University04103LeipzigGermany
| | - Heinz‐Georg Jahnke
- Centre for Biotechnology and Biomedicine Molecular Biological-Biochemical Processing TechnologyLeipzig University04103LeipzigGermany
| | - Susan Billig
- Institute of Analytical ChemistryLeipzig University04103LeipzigGermany
| | - Bernd Abel
- Leibniz Institute of Surface Engineering (IOM)Wilhelm-Ostwald-Institute of Physical and Theoretical Chemistry04103LeipzigGermany
| | - Norbert Sträter
- Institute of Bioanalytical Chemistry, Centre for Biotechnology and BiomedicineLeipzig University04103LeipzigGermany
| | - Jörg Matysik
- Institute of Analytical ChemistryLeipzig University04103LeipzigGermany
| | - Wolfgang Zimmermann
- Institute of Analytical ChemistryLeipzig University04103LeipzigGermany
- Department of Microbiology and Bioprocess Technology Institute of BiochemistryLeipzig University04103LeipzigGermany
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8
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Wei R, von Haugwitz G, Pfaff L, Mican J, Badenhorst CP, Liu W, Weber G, Austin HP, Bednar D, Damborsky J, Bornscheuer UT. Mechanism-Based Design of Efficient PET Hydrolases. ACS Catal 2022; 12:3382-3396. [PMID: 35368328 PMCID: PMC8939324 DOI: 10.1021/acscatal.1c05856] [Citation(s) in RCA: 68] [Impact Index Per Article: 34.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 02/04/2022] [Indexed: 01/06/2023]
Abstract
Polyethylene terephthalate (PET) is the most widespread synthetic polyester, having been utilized in textile fibers and packaging materials for beverages and food, contributing considerably to the global solid waste stream and environmental plastic pollution. While enzymatic PET recycling and upcycling have recently emerged as viable disposal methods for a circular plastic economy, only a handful of benchmark enzymes have been thoroughly described and subjected to protein engineering for improved properties over the last 16 years. By analyzing the specific material properties of PET and the reaction mechanisms in the context of interfacial biocatalysis, this Perspective identifies several limitations in current enzymatic PET degradation approaches. Unbalanced enzyme-substrate interactions, limited thermostability, and low catalytic efficiency at elevated reaction temperatures, and inhibition caused by oligomeric degradation intermediates still hamper industrial applications that require high catalytic efficiency. To overcome these limitations, successful protein engineering studies using innovative experimental and computational approaches have been published extensively in recent years in this thriving research field and are summarized and discussed in detail here. The acquired knowledge and experience will be applied in the near future to address plastic waste contributed by other mass-produced polymer types (e.g., polyamides and polyurethanes) that should also be properly disposed by biotechnological approaches.
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Affiliation(s)
- Ren Wei
- Institute
of Biochemistry, Department of Biotechnology & Enzyme Catalysis, University of Greifswald, Felix-Hausdorff-Str. 4, D-17487 Greifswald, Germany,
| | - Gerlis von Haugwitz
- Institute
of Biochemistry, Department of Biotechnology & Enzyme Catalysis, University of Greifswald, Felix-Hausdorff-Str. 4, D-17487 Greifswald, Germany
| | - Lara Pfaff
- Institute
of Biochemistry, Department of Biotechnology & Enzyme Catalysis, University of Greifswald, Felix-Hausdorff-Str. 4, D-17487 Greifswald, Germany
| | - Jan Mican
- Loschmidt
Laboratories, Department of Experimental Biology and RECETOX, Faculty
of Science, Masaryk University, 625 00 Brno, Czech Republic,International
Clinical Research Center, St. Anne’s University Hospital and
Faculty of Medicine, Masaryk University, 656 91 Brno, Czech Republic
| | - Christoffel P.
S. Badenhorst
- Institute
of Biochemistry, Department of Biotechnology & Enzyme Catalysis, University of Greifswald, Felix-Hausdorff-Str. 4, D-17487 Greifswald, Germany
| | - Weidong Liu
- Tianjin
Institute of Industrial Biotechnology, Chinese Academy of Sciences, 32 West 7th Avenue, Tianjin Airport
Economic Area, Tianjin, 300308, China
| | - Gert Weber
- Macromolecular
Crystallography, Helmholtz-Zentrum Berlin
für Materialien und Energie, Albert-Einstein-Straße 15, D-12489 Berlin, Germany
| | - Harry P. Austin
- Institute
of Biochemistry, Department of Biotechnology & Enzyme Catalysis, University of Greifswald, Felix-Hausdorff-Str. 4, D-17487 Greifswald, Germany
| | - David Bednar
- Loschmidt
Laboratories, Department of Experimental Biology and RECETOX, Faculty
of Science, Masaryk University, 625 00 Brno, Czech Republic,International
Clinical Research Center, St. Anne’s University Hospital and
Faculty of Medicine, Masaryk University, 656 91 Brno, Czech Republic
| | - Jiri Damborsky
- Loschmidt
Laboratories, Department of Experimental Biology and RECETOX, Faculty
of Science, Masaryk University, 625 00 Brno, Czech Republic,International
Clinical Research Center, St. Anne’s University Hospital and
Faculty of Medicine, Masaryk University, 656 91 Brno, Czech Republic
| | - Uwe T. Bornscheuer
- Institute
of Biochemistry, Department of Biotechnology & Enzyme Catalysis, University of Greifswald, Felix-Hausdorff-Str. 4, D-17487 Greifswald, Germany,
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9
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Chen B, Torkelson JM. Development of rigid amorphous fraction in cold‐crystallized syndiotactic polystyrene films confined near the nanoscale: Novel analysis via ellipsometry. JOURNAL OF POLYMER SCIENCE 2022. [DOI: 10.1002/pol.20220056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Boran Chen
- Department of Chemical and Biological Engineering Northwestern University Evanston Illinois USA
| | - John M. Torkelson
- Department of Chemical and Biological Engineering Northwestern University Evanston Illinois USA
- Department of Materials Science and Engineering Northwestern University Evanston Illinois USA
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10
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Recent Advances in Biological Recycling of Polyethylene Terephthalate (PET) Plastic Wastes. Bioengineering (Basel) 2022; 9:bioengineering9030098. [PMID: 35324787 PMCID: PMC8945055 DOI: 10.3390/bioengineering9030098] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Revised: 02/19/2022] [Accepted: 02/23/2022] [Indexed: 11/24/2022] Open
Abstract
Polyethylene terephthalate (PET) is one of the most commonly used polyester plastics worldwide but is extremely difficult to be hydrolyzed in a natural environment. PET plastic is an inexpensive, lightweight, and durable material, which can readily be molded into an assortment of products that are used in a broad range of applications. Most PET is used for single-use packaging materials, such as disposable consumer items and packaging. Although PET plastics are a valuable resource in many aspects, the proliferation of plastic products in the last several decades have resulted in a negative environmental footprint. The long-term risk of released PET waste in the environment poses a serious threat to ecosystems, food safety, and even human health in modern society. Recycling is one of the most important actions currently available to reduce these impacts. Current clean-up strategies have attempted to alleviate the adverse impacts of PET pollution but are unable to compete with the increasing quantities of PET waste exposed to the environment. In this review paper, current PET recycling methods to improve life cycle and waste management are discussed, which can be further implemented to reduce plastics pollution and its impacts on health and environment. Compared with conventional mechanical and chemical recycling processes, the biotechnological recycling of PET involves enzymatic degradation of the waste PET and the followed bioconversion of degraded PET monomers into value-added chemicals. This approach creates a circular PET economy by recycling waste PET or upcycling it into more valuable products with minimal environmental footprint.
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11
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Characterisation of Hemp Fibres Reinforced Composites Using Thermoplastic Polymers as Matrices. Polymers (Basel) 2022; 14:polym14030481. [PMID: 35160470 PMCID: PMC8840225 DOI: 10.3390/polym14030481] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Revised: 01/20/2022] [Accepted: 01/20/2022] [Indexed: 12/10/2022] Open
Abstract
Hemp fibres used as a reinforcing agent and three polymeric matrices (polypropylene, bicomponent, recycled polyester) were used to obtain composite materials by needle punching and heat pressing. The influence of the hemp/matrix ratio and the nature of the matrix on the properties of the composites were analysed. The obtained composites were characterised by physical–mechanical indices, thermal analysis (thermogravimetry (TG), differential thermogravimetry (DTG) and Differential Scanning Calorimetry (DSC)), Fourier Transform Infrared Spectroscopy (FTIR-ATR) analysis, Scanning Electron Microscopy (SEM) and Chromatic measurements. The mechanical properties of composites are influenced by both the hemp/matrix ratio and the nature of the matrix. The thermal stability of composites decreased as the amount of hemp increased (for the same mass losses, the decomposition temperature decreased significantly for composites containing a quantity of hemp greater than 50%). Regarding the nature of the matrix, for the same mass loss, the highest decomposition temperature was presented by the composites containing recycled polyester as matrix, and the lowest one was presented by composites containing polypropylene fibres as matrix. The FTIR and SEM analyses highlight the changes that occurred in the structure of the composite, changes determined both by the amount of hemp in the composite and by the nature of the matrix.
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12
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Gao R, Pan H, Lian J. Recent advances in the discovery, characterization, and engineering of poly(ethylene terephthalate) (PET) hydrolases. Enzyme Microb Technol 2021; 150:109868. [PMID: 34489027 DOI: 10.1016/j.enzmictec.2021.109868] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 07/01/2021] [Accepted: 07/06/2021] [Indexed: 12/28/2022]
Abstract
Poly(ethylene terephthalate) (PET) is a class of polyester plastic composed of terephthalic acid (TPA) and ethylene glycol (EG). The accumulation of large amount of PET waste has resulted in severe environmental and health problems. Microbial polyester hydrolases with the ability to degrade PET provide an economy- and environment-friendly approach for the treatment of PET waste. In recent years, many PET hydrolases have been discovered and characterized from various microorganisms and engineered for better performance under practical application conditions. Here, recent progress in the discovery, characterization, and enzymatic mechanism elucidation of PET hydrolases is firstly reviewed. Then, structure-guided protein engineering of PET hydrolases with increased enzymatic activities, expanded substrate specificity, as well as improved protein stability is summarized. In addition, strategies for efficient expression of recombinant PET hydrolases, including secretory expression and cell-surface display, are briefly introduced. This review is concluded with future perspectives in biodegradation and subsequent biotransformation of PET wastes to produce value-added compounds.
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Affiliation(s)
- Rui Gao
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Haojie Pan
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Jiazhang Lian
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China; Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou, 310027, China.
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13
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Kan Y, He L, Luo Y, Bao R. IsPETase Is a Novel Biocatalyst for Poly(ethylene terephthalate) (PET) Hydrolysis. Chembiochem 2021; 22:1706-1716. [PMID: 33434375 DOI: 10.1002/cbic.202000767] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 01/10/2021] [Indexed: 02/05/2023]
Abstract
Poly(ethylene terephthalate) (PET) is one of the most widely used synthetic polyesters, but also a major cause of plastic pollution. Because the chemical degradation of PET would be uneconomical and rather burdensome, considerable efforts have been devoted to exploring enzymatic processes for the disposal of PET waste. Many PET-hydrolyzing enzymes have been reported in recent decades, some of which demonstrate excellent potential for industrial applications. This review sets out to summarize the state of investigation into IsPETase, a cutinase-like enzyme from Ideonella sakaiensis possessing ability to degrade crystalline PET, and to gain further insight into the structure-function relationship of IsPETase. Benefiting from the continuing identification of novel cutinase-like proteins and growing availability of the engineered IsPETase, we may anticipate future developments in this type of enzyme would generate suitable biocatalyst for industrial use.
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Affiliation(s)
- Yeyi Kan
- Center of Infectious Diseases, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University and Collaborative Innovation Center, Chengdu, 610041, P. R. China
| | - Lihui He
- Center of Infectious Diseases, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University and Collaborative Innovation Center, Chengdu, 610041, P. R. China
| | - Yunzi Luo
- Center of Infectious Diseases, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University and Collaborative Innovation Center, Chengdu, 610041, P. R. China.,Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, P. R. China
| | - Rui Bao
- Center of Infectious Diseases, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University and Collaborative Innovation Center, Chengdu, 610041, P. R. China
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Vassiliadou O, Chrysostomou V, Pispas S, Klonos PA, Kyritsis A. Molecular dynamics and crystallization in polymers based on ethylene glycol methacrylates (EGMAs) with melt memory characteristics: from linear oligomers to comb-like polymers. SOFT MATTER 2021; 17:1284-1298. [PMID: 33305780 DOI: 10.1039/d0sm01666g] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
In this article we present results on the glass transition, crystallization and molecular dynamics in relatively novel oligomers, oligo-ethylene glycol methacrylate (OEGMA), with short and long chains, as well as in the corresponding nanostructured comb-like polymers (POEGMA, short and long), the latter being prepared via the RAFT polymerization process. For the investigation we employed conventional and temperature modulated differential scanning calorimetry in combination with high resolving power dielectric spectroscopy techniques, broadband dielectric relaxation spectroscopy (BDS) and thermally stimulated depolarization currents (TSDC). Under ambient conditions short OEGMA (475 g mol-1, ∼4 nm in length) exhibits a remarkable low glass transition temperature, Tg, of -91 °C, crystallization temperature Tc = -24 °C and a significant crystalline fraction, CF, of ∼30%. When doubling the number of monomers (OEGMA-long, 950 g mol-1, chain length ∼8 nm) the Tg increases by about 20 K and CF increases to ∼53%, whereas, the Tc migrates to a room-like temperature of 19 °C. Upon formation of comb-like POEGMA structures the grafted OEGMA short chains, strikingly, are not able to crystallize, while in POEGMA-long the crystallization behaviour changes significantly as compared to OEGMA. Our results indicate that in the comb-like architecture the chain diffusion of the amorphous fractions is also strongly affected. The semicrystalline systems exhibit significant melt memory effects, this being stronger in the comb-like architecture. It is shown that these effects are related to the inter- and intra-chain interactions of the crystallizable chains. The dielectric techniques allowed the molecular dynamics mapping of these new systems from the linear oligomers to POEGMAs for the first time. BDS and TSDC detected various dynamics processes, in particular, the local polymer dynamics (γ process) to be sensitive to the Tg, local dynamics triggered in the hydrophilic chain segments by water traces (β), as well as the segmental dynamics (α) related to glass transition. Interestingly, both the short and long linear OEGMAs exhibit an additional relaxation process that resembles the Normal-Mode process appearing in polyethers. In the corresponding POEGMAs this process could not be resolved, this being an effect of the one-side grafted chain on the comb backbone. The revealed variations in molecular mobility and crystallization behavior suggest the potentially manipulable diffusion of small molecules throughout the polymer volume, via both the molecular architecture as well as the thermal treatment. This ability is extremely useful for these novel materials, envisaging their future applications in biomedicine (drug encapsulation).
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Affiliation(s)
- Olga Vassiliadou
- Department of Physics, National Technical University of Athens, Zografou Campus, 15780, Athens, Greece.
| | - Varvara Chrysostomou
- Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vassileos Constantinou Avenue, 11635 Athens, Greece
| | - Stergios Pispas
- Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vassileos Constantinou Avenue, 11635 Athens, Greece
| | - Panagiotis A Klonos
- Department of Physics, National Technical University of Athens, Zografou Campus, 15780, Athens, Greece.
| | - Apostolos Kyritsis
- Department of Physics, National Technical University of Athens, Zografou Campus, 15780, Athens, Greece.
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15
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Pérez-García P, Danso D, Zhang H, Chow J, Streit WR. Exploring the global metagenome for plastic-degrading enzymes. Methods Enzymol 2021; 648:137-157. [PMID: 33579401 DOI: 10.1016/bs.mie.2020.12.022] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Plastics are extensively used in our daily life, but they are also a major pollutant of our biosphere accumulating in both the ocean and the land. In the recent years, few enzymes and microorganisms have been discovered with the ability to degrade even fewer synthetic polymers. Nevertheless, more active species and enzymes need to be discovered and described in order to gain more knowledge about protein adaptation to the degradation of not-naturally-occurring polymers. Within this chapter, we focus on efficient methods to identify novel polyethylene terephthalate-degrading enzymes (PETases) from culturable and non-culturable microorganisms by a combination of sequence- and function-based screening. This protocol can be adapted to discover other plastic hydrolases and in general for other enzymes, for which not many characterized specimens are yet available.
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Affiliation(s)
- Pablo Pérez-García
- Department of Microbiology and Biotechnology, University of Hamburg, Hamburg, Germany
| | - Dominik Danso
- Department of Microbiology and Biotechnology, University of Hamburg, Hamburg, Germany
| | - Hongli Zhang
- Department of Microbiology and Biotechnology, University of Hamburg, Hamburg, Germany
| | - Jennifer Chow
- Department of Microbiology and Biotechnology, University of Hamburg, Hamburg, Germany
| | - Wolfgang R Streit
- Department of Microbiology and Biotechnology, University of Hamburg, Hamburg, Germany.
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16
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Samak NA, Jia Y, Sharshar MM, Mu T, Yang M, Peh S, Xing J. Recent advances in biocatalysts engineering for polyethylene terephthalate plastic waste green recycling. ENVIRONMENT INTERNATIONAL 2020; 145:106144. [PMID: 32987219 DOI: 10.1016/j.envint.2020.106144] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Revised: 09/10/2020] [Accepted: 09/13/2020] [Indexed: 05/21/2023]
Abstract
The massive waste of poly(ethylene terephthalate) (PET) that ends up in the landfills and oceans and needs hundreds of years for degradation has attracted global concern. The poor stability and productivity of the available PET biocatalysts hinder their industrial applications. Active PET biocatalysts can provide a promising avenue for PET bioconversion and recycling. Therefore, there is an urgent need to develop new strategies that could enhance the stability, catalytic activity, solubility, productivity, and re-usability of these PET biocatalysts under harsh conditions such as high temperatures, pH, and salinity. This has raised great attention in using bioengineering strategies to improve PET biocatalysts' robustness and catalytic behavior. Herein, historical and forecasting data of plastic production and disposal were critically reviewed. Challenges facing the PET degradation process and available strategies that could be used to solve them were critically highlighted and summarized. In this review, we also discussed the recent progress in enzyme bioengineering approaches used for discovering new PET biocatalysts, elucidating the degradation mechanism, and improving the catalytic performance, solubility, and productivity, critically assess their strength and weakness and highlighting the gaps of the available data. Discovery of more potential PET hydrolases and studying their molecular mechanism extensively via solving their crystal structure will widen this research area to move forward the industrial application. A deeper knowledge of PET molecular and degradation mechanisms will give great insight into the future identification of related enzymes. The reported bioengineering strategies during this review could be used to reduce PET crystallinity and to increase the operational temperature of PET hydrolyzing enzymes.
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Affiliation(s)
- Nadia A Samak
- CAS Key Laboratory of Green Process and Engineering & State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, PR China; College of Chemical Engineering, University of Chinese Academy of Sciences, 19 A Yuquan Road, Beijing 100049, PR China; Processes Design and Development Department, Egyptian Petroleum Research Institute, Nasr City, 11727 Cairo, Egypt
| | - Yunpu Jia
- CAS Key Laboratory of Green Process and Engineering & State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, PR China; College of Chemical Engineering, University of Chinese Academy of Sciences, 19 A Yuquan Road, Beijing 100049, PR China
| | - Moustafa M Sharshar
- CAS Key Laboratory of Green Process and Engineering & State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, PR China; College of Chemical Engineering, University of Chinese Academy of Sciences, 19 A Yuquan Road, Beijing 100049, PR China
| | - Tingzhen Mu
- CAS Key Laboratory of Green Process and Engineering & State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, PR China
| | - Maohua Yang
- CAS Key Laboratory of Green Process and Engineering & State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, PR China
| | - Sumit Peh
- CAS Key Laboratory of Green Process and Engineering & State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, PR China; College of Chemical Engineering, University of Chinese Academy of Sciences, 19 A Yuquan Road, Beijing 100049, PR China
| | - Jianmin Xing
- CAS Key Laboratory of Green Process and Engineering & State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, PR China; College of Chemical Engineering, University of Chinese Academy of Sciences, 19 A Yuquan Road, Beijing 100049, PR China.
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17
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Xi X, Ni K, Hao H, Shang Y, Zhao B, Qian Z. Secretory expression in Bacillus subtilis and biochemical characterization of a highly thermostable polyethylene terephthalate hydrolase from bacterium HR29. Enzyme Microb Technol 2020; 143:109715. [PMID: 33375975 DOI: 10.1016/j.enzmictec.2020.109715] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Revised: 11/09/2020] [Accepted: 11/17/2020] [Indexed: 02/07/2023]
Abstract
The environmental threat posed by disposal of plastic wastes has drawn extensive attention in recent years wherein polyethylene terephthalate (PET) constitutes one of the major plastic materials in the wastes. Recycling of PET wastes into reusable materials effectively overcomes its accumulation in the environment and can be achieved by mechanical, chemical, and biological processes. In comparison to the other methods, enzymatic treatment utilizing PET hydrolyzing enzymes (PETases) is environmental-friendly which avoids the use of hazardous chemicals. In this study, we report on the secretory expression in Bacillus subtilis a PETase (BhrPETase) from the bacterium HR29, a close homologue of the leaf-branch compost cutinase (LCC) with 94 % sequence identity. The expression titer of BhrPETase reached 0.66 g/L in an engineered chaperone-overexpression Bacillus subtilis strain, and the biochemical characterization of BhrPETase for the first time revealed its high hydrolyzing activity towards amorphous PET in comparison to two reported PET hydrolyzing enzymes LCC and IsPETase, which were expressed under the same expression conditions in Bacillus subtilis in our study. Most intriguingly, purified BhrPETase displayed a melting temperature as high as 101 °C. To our knowledge it is the most thermostable bacterial PETase characterized so far. The superior activity and thermostability of BhrPETase rendered it one of the most promising PETases for plastic waste recycling and bioremediation applications in the future.
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Affiliation(s)
- Xingxiang Xi
- School of Pharmacy, Shanghai Jiao Tong University, Shanghai, 200240, China; China Research Center, DuPont Nutrition & Biosciences, Shanghai, 200335, China
| | - Kefeng Ni
- China Research Center, DuPont Nutrition & Biosciences, Shanghai, 200335, China
| | - Helong Hao
- China Research Center, DuPont Nutrition & Biosciences, Shanghai, 200335, China
| | - Yuepeng Shang
- China Research Center, DuPont Nutrition & Biosciences, Shanghai, 200335, China
| | - Bo Zhao
- School of Pharmacy, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Zhen Qian
- China Research Center, DuPont Nutrition & Biosciences, Shanghai, 200335, China.
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18
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Study of Raw and Recycled Polyethylene Terephthalate by Meaning of TGA and Computer Simulation. ADVANCES IN POLYMER TECHNOLOGY 2020. [DOI: 10.1155/2020/8865926] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The pyrolysis method of both raw and recycled polyethylene terephthalate was studied using the nonisothermal thermogravimetric analysis (TGA) at different five heating rates (10, 15, 20, 25, and 30 K/min) for each element. Without using any mathematical equations, the kinetic parameters of polyethylene terephthalate pyrolysis were obtained by applying the modified distributed activation energy model (DAEM). Furthermore, the glass transition temperature (Tg) of polyethylene terephthalate was simulated using the computer simulation with different methods. The effect of energy in the Tg process was enhanced. The mechanical properties of polyethylene terephthalate were computed. Our simulated values were compared with available data in literature.
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19
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Interfacial phenomena and molecular dynamics in core-shell-type nanocomposites based on polydimethylsiloxane and fumed silica: Comparison between impregnation and the new mechano-sorption modification as preparation methods. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.122876] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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20
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Ferrari F, Esposito Corcione C, Montagna F, Maffezzoli A. 3D Printing of Polymer Waste for Improving People's Awareness about Marine Litter. Polymers (Basel) 2020; 12:polym12081738. [PMID: 32759642 PMCID: PMC7464207 DOI: 10.3390/polym12081738] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 07/28/2020] [Accepted: 07/31/2020] [Indexed: 11/30/2022] Open
Abstract
This work is aimed at proposing demonstrative actions devoted to show reprocessing and recyclability of PET originating from bottles collected from the seaside, in order to increase the consumer awareness on the importance of recycling plastics. To this purpose, collected bottles were washed, cut, grinded, extruded in the form of a thin wire adopting different cooling rates, which leads to a modulation of the crystallinity content. Once having optimized the processing parameters, the extruded wire was used to produce 3D printed samples through the fused deposition modelling (FDM). The changes in the crystalline structure due to the different processing conditions were assessed by DSC and XRD analyses, while rheological tests were performed in order to evaluate any modification in the viscosity of PET after repeated processing cycles. The reduction in thermal stability was confirmed by TGA analysis, which showed a progressive decrease in the degradation temperature as processing cycles increased. Finally, tensile tests highlighted the difference in the mechanical response due to the predominance of the crystalline or amorphous phase in the tested sample. In particular, a good mechanical behavior was found for the 3D-printed samples.
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21
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Li Y, Makita Y, Zhang G, Rui G, Li ZM, Zhong GJ, Miyoshi T, Huang HD, Zhu L. Effects of Rigid Amorphous Fraction and Lamellar Crystal Orientation on Electrical Insulation of Poly(ethylene terephthalate) Films. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c00646] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Yue Li
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, Sichuan, P. R. China
- Department of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, Ohio 44106-7202, United States
| | - Yuta Makita
- Department of Polymer Science, University of Akron, Akron, Ohio 44325-3909, United States
| | - Guoqiang Zhang
- Department of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, Ohio 44106-7202, United States
| | - Guanchun Rui
- Department of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, Ohio 44106-7202, United States
| | - Zhong-Ming Li
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, Sichuan, P. R. China
| | - Gan-Ji Zhong
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, Sichuan, P. R. China
| | - Toshikazu Miyoshi
- Department of Polymer Science, University of Akron, Akron, Ohio 44325-3909, United States
| | - Hua-Dong Huang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, Sichuan, P. R. China
- Department of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, Ohio 44106-7202, United States
| | - Lei Zhu
- Department of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, Ohio 44106-7202, United States
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22
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Cerovic DD, Asanovic KA, Maletic SB, Marinkovic FS, Petronijevic IM, Dojcilovic JR. Electrophysical properties of woven polymer mesh fabrics. J Appl Polym Sci 2020. [DOI: 10.1002/app.48456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Dragana D. Cerovic
- Faculty of PhysicsUniversity of Belgrade Studentski trg 12, 11000 Belgrade Serbia
- The College of Textile DesignTechnology and Management Starine Novaka 24, 11000 Belgrade Serbia
| | - Koviljka A. Asanovic
- Department of Textile Engineering, Faculty of Technology and MetallurgyUniversity of Belgrade Karnegijeva 4, 11000 Belgrade Serbia
| | - Slavica B. Maletic
- Faculty of PhysicsUniversity of Belgrade Studentski trg 12, 11000 Belgrade Serbia
| | - Filip S. Marinkovic
- Faculty of PhysicsUniversity of Belgrade Studentski trg 12, 11000 Belgrade Serbia
| | - Ivan M. Petronijevic
- Faculty of PhysicsUniversity of Belgrade Studentski trg 12, 11000 Belgrade Serbia
| | - Jablan R. Dojcilovic
- Faculty of PhysicsUniversity of Belgrade Studentski trg 12, 11000 Belgrade Serbia
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23
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de Lourdes Pérez-González ML, González-de la Rosa CH, Pérez-Hernández G, Beltrán HI. Nanostructured oleic acid/polysorbate 80 emulsions with diminished toxicity in NL-20 cell line: Insights of potential drug carriers. Colloids Surf B Biointerfaces 2020; 187:110758. [DOI: 10.1016/j.colsurfb.2019.110758] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Revised: 12/04/2019] [Accepted: 12/23/2019] [Indexed: 01/17/2023]
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24
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Papadopoulos L, Klonos PA, Tzetzis D, Papageorgiou GZ, Kyritsis A, Bikiaris DN. Effects of graphene nanoplatelets on crystallization, mechanical performance and molecular dynamics of the renewable poly(propylene furanoate). POLYMER 2020. [DOI: 10.1016/j.polymer.2020.122172] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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25
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Conformational fitting of a flexible oligomeric substrate does not explain the enzymatic PET degradation. Nat Commun 2019; 10:5581. [PMID: 31811142 PMCID: PMC6897938 DOI: 10.1038/s41467-019-13492-9] [Citation(s) in RCA: 63] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Accepted: 11/04/2019] [Indexed: 01/19/2023] Open
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26
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Wei R, Breite D, Song C, Gräsing D, Ploss T, Hille P, Schwerdtfeger R, Matysik J, Schulze A, Zimmermann W. Biocatalytic Degradation Efficiency of Postconsumer Polyethylene Terephthalate Packaging Determined by Their Polymer Microstructures. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2019; 6:1900491. [PMID: 31380212 PMCID: PMC6662049 DOI: 10.1002/advs.201900491] [Citation(s) in RCA: 113] [Impact Index Per Article: 22.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Revised: 04/24/2019] [Indexed: 05/09/2023]
Abstract
Polyethylene terephthalate (PET) is the most important mass-produced thermoplastic polyester used as a packaging material. Recently, thermophilic polyester hydrolases such as TfCut2 from Thermobifida fusca have emerged as promising biocatalysts for an eco-friendly PET recycling process. In this study, postconsumer PET food packaging containers are treated with TfCut2 and show weight losses of more than 50% after 96 h of incubation at 70 °C. Differential scanning calorimetry analysis indicates that the high linear degradation rates observed in the first 72 h of incubation is due to the high hydrolysis susceptibility of the mobile amorphous fraction (MAF) of PET. The physical aging process of PET occurring at 70 °C is shown to gradually convert MAF to polymer microstructures with limited accessibility to enzymatic hydrolysis. Analysis of the chain-length distribution of degraded PET by nuclear magnetic resonance spectroscopy reveals that MAF is rapidly hydrolyzed via a combinatorial exo- and endo-type degradation mechanism whereas the remaining PET microstructures are slowly degraded only by endo-type chain scission causing no detectable weight loss. Hence, efficient thermostable biocatalysts are required to overcome the competitive physical aging process for the complete degradation of postconsumer PET materials close to the glass transition temperature of PET.
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Affiliation(s)
- Ren Wei
- Department of Microbiology and Bioprocess TechnologyInstitute of BiochemistryLeipzig UniversityJohannisallee 23D‐04103LeipzigGermany
| | - Daniel Breite
- Leibniz Institute of Surface Engineering (IOM)Permoserstrasse 15D‐04318LeipzigGermany
| | - Chen Song
- Institute of Analytical ChemistryLeipzig UniversityLinnéstrasse 3D‐04103LeipzigGermany
| | - Daniel Gräsing
- Institute of Analytical ChemistryLeipzig UniversityLinnéstrasse 3D‐04103LeipzigGermany
| | - Tina Ploss
- AB Enzymes GmbHFeldbergstrasse 78D‐64293DarmstadtGermany
| | - Patrick Hille
- Department of Microbiology and Bioprocess TechnologyInstitute of BiochemistryLeipzig UniversityJohannisallee 23D‐04103LeipzigGermany
| | | | - Jörg Matysik
- Institute of Analytical ChemistryLeipzig UniversityLinnéstrasse 3D‐04103LeipzigGermany
| | - Agnes Schulze
- Leibniz Institute of Surface Engineering (IOM)Permoserstrasse 15D‐04318LeipzigGermany
| | - Wolfgang Zimmermann
- Department of Microbiology and Bioprocess TechnologyInstitute of BiochemistryLeipzig UniversityJohannisallee 23D‐04103LeipzigGermany
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27
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Syrtsova DA, Teplyakov VV. High-Energy Ion Treatment of Lavsan Films Followed by Controlled Track Etching to Obtain Asymmetric Gas-Separation Membranes. RUSS J APPL CHEM+ 2019. [DOI: 10.1134/s1070427219010021x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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28
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Rasoulianboroujeni M, Fahimipour F, Shah P, Khoshroo K, Tahriri M, Eslami H, Yadegari A, Dashtimoghadam E, Tayebi L. Development of 3D-printed PLGA/TiO 2 nanocomposite scaffolds for bone tissue engineering applications. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 96:105-113. [PMID: 30606516 PMCID: PMC6388694 DOI: 10.1016/j.msec.2018.10.077] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Revised: 09/01/2018] [Accepted: 10/22/2018] [Indexed: 01/20/2023]
Abstract
Porous scaffolds were 3D-printed using poly lactic-co-glycolic acid (PLGA)/TiO2 composite (10:1 weight ratio) for bone tissue engineering applications. Addition of TiO2 nanoparticles improved the compressive modulus of scaffolds. Differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) revealed an increase in both glass transition temperature and thermal decomposition onset of the composite compared to pure PLGA. Furthermore, addition of TiO2 was found to enhance the wettability of the surface evidenced by reducing the contact angle from 90.5 ± 3.2 to 79.8 ± 2.4 which is in favor of cellular attachment and activity. The obtained results revealed that PLGA/TiO2 scaffolds significantly improved osteoblast proliferation compared to pure PLGA (p < 0.05). Furthermore, osteoblasts cultured on PLGA/TiO2 nanocomposite showed significantly higher ALP activity and improved calcium secretion compared to pure PLGA scaffolds (p < 0.05).
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Affiliation(s)
| | - F Fahimipour
- Marquette University School of Dentistry, Milwaukee, WI 53233, USA
| | - P Shah
- Marquette University School of Dentistry, Milwaukee, WI 53233, USA
| | - K Khoshroo
- Marquette University School of Dentistry, Milwaukee, WI 53233, USA
| | - M Tahriri
- Marquette University School of Dentistry, Milwaukee, WI 53233, USA
| | - H Eslami
- Department of Biomedical Engineering, Haeri University, Yazd, Iran
| | - A Yadegari
- Marquette University School of Dentistry, Milwaukee, WI 53233, USA
| | - E Dashtimoghadam
- Marquette University School of Dentistry, Milwaukee, WI 53233, USA
| | - L Tayebi
- Marquette University School of Dentistry, Milwaukee, WI 53233, USA.
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29
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Hermida ÉB, Arenas CD. Phenomenological models for the isothermal physical aging of PEEK. Heliyon 2018; 4:e01018. [PMID: 30582041 PMCID: PMC6290128 DOI: 10.1016/j.heliyon.2018.e01018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Revised: 09/29/2018] [Accepted: 12/04/2018] [Indexed: 11/05/2022] Open
Abstract
Creep test is a useful tool to study thermal aging and deformation mechanisms of semi-crystalline polymers, such as polyether-ether-ketone (PEEK). Hou and Chen proposed a power law to fit creep data of PEEK aged at different temperatures and the master curve built from those data. This paper attempts to complement that analysis by introducing Kohlrausch function as an alternative to the fractional Maxwell's model associated to the power law. Although the fitting of experimental data and the mathematical conditions imposed to equations that describe curves that can be superimposed by translations, are obeyed by both models, this paper demonstrates that Kohlrausch function provides a better phenomenological description of the creep response of PEEK due to the physical interpretation of the fitting parameters and their dependence on the aging time and temperature.
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Affiliation(s)
- Élida Beatriz Hermida
- Escuela de Ciencia y Tecnología, UNSAM, Campus Miguelete, 25 de mayo 1169, B1650HMR San Martín, Argentina.,CONICET, Godoy Cruz 2290, C1425FQB Caba, Argentina
| | - Claudio Daniel Arenas
- Instituto Sabato, UNSAM-CNEA, Av. Gral. Paz 1499, B1650KNA San Martín, Argentina.,Gerencia Materiales, Comisión Nacional de Energía Atómica, Av. Gral. Paz 1499, B1650KNA San Martín, Argentina
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Abstract
Cutinases are α/β hydrolases, and their role in nature is the degradation of cutin. Such enzymes are usually produced by phytopathogenic microorganisms in order to penetrate their hosts. The first focused studies on cutinases started around 50 years ago. Since then, numerous cutinases have been isolated and characterized, aiming at the elucidation of their structure–function relations. Our deeper understanding of cutinases determines the applications by which they could be utilized; from food processing and detergents, to ester synthesis and polymerizations. However, cutinases are mainly efficient in the degradation of polyesters, a natural function. Therefore, these enzymes have been successfully applied for the biodegradation of plastics, as well as for the delicate superficial hydrolysis of polymeric materials prior to their functionalization. Even though research on this family of enzymes essentially began five decades ago, they are still involved in many reports; novel enzymes are being discovered, and new fields of applications arise, leading to numerous related publications per year. Perhaps the future of cutinases lies in their evolved descendants, such as polyesterases, and particularly PETases. The present article reviews the biochemical and structural characteristics of cutinases and cutinase-like hydrolases, and their applications in the field of bioremediation and biocatalysis.
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31
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Klonos P, Bolbukh Y, Koutsiara C, Zafeiris K, Kalogeri O, Sternik D, Deryło–Marczewska A, Tertykh V, Pissis P. Morphology and molecular dynamics investigation of low molecular weight PDMS adsorbed onto Stöber, fumed, and sol-gel silica nanoparticles. POLYMER 2018. [DOI: 10.1016/j.polymer.2018.06.019] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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32
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Zheng Q, Pesko DM, Savoie BM, Timachova K, Hasan AL, Smith MC, Miller TF, Coates GW, Balsara NP. Optimizing Ion Transport in Polyether-Based Electrolytes for Lithium Batteries. Macromolecules 2018. [DOI: 10.1021/acs.macromol.7b02706] [Citation(s) in RCA: 69] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Qi Zheng
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States
| | - Danielle M. Pesko
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, Berkeley, California 94720, United States
| | - Brett M. Savoie
- Charles D. Davidson School of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47906, United States
| | - Ksenia Timachova
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, Berkeley, California 94720, United States
| | - Alexandra L. Hasan
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, Berkeley, California 94720, United States
| | - Mackensie C. Smith
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, Berkeley, California 94720, United States
| | - Thomas F. Miller
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Geoffrey W. Coates
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States
| | - Nitash P. Balsara
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, Berkeley, California 94720, United States
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33
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Wei R, Zimmermann W. Microbial enzymes for the recycling of recalcitrant petroleum-based plastics: how far are we? Microb Biotechnol 2017; 10:1308-1322. [PMID: 28371373 PMCID: PMC5658625 DOI: 10.1111/1751-7915.12710] [Citation(s) in RCA: 312] [Impact Index Per Article: 44.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Revised: 03/02/2017] [Accepted: 03/06/2017] [Indexed: 01/25/2023] Open
Abstract
Petroleum-based plastics have replaced many natural materials in their former applications. With their excellent properties, they have found widespread uses in almost every area of human life. However, the high recalcitrance of many synthetic plastics results in their long persistence in the environment, and the growing amount of plastic waste ending up in landfills and in the oceans has become a global concern. In recent years, a number of microbial enzymes capable of modifying or degrading recalcitrant synthetic polymers have been identified. They are emerging as candidates for the development of biocatalytic plastic recycling processes, by which valuable raw materials can be recovered in an environmentally sustainable way. This review is focused on microbial biocatalysts involved in the degradation of the synthetic plastics polyethylene, polystyrene, polyurethane and polyethylene terephthalate (PET). Recent progress in the application of polyester hydrolases for the recovery of PET building blocks and challenges for the application of these enzymes in alternative plastic waste recycling processes will be discussed.
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Affiliation(s)
- Ren Wei
- Department of Microbiology and Bioprocess TechnologyInstitute of BiochemistryLeipzig UniversityJohannisallee 21‐2304103LeipzigGermany
| | - Wolfgang Zimmermann
- Department of Microbiology and Bioprocess TechnologyInstitute of BiochemistryLeipzig UniversityJohannisallee 21‐2304103LeipzigGermany
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34
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Monnier X, Chevalier L, Esposito A, Fernandez-Ballester L, Saiter A, Dargent E. Local and segmental motions of the mobile amorphous fraction in semi-crystalline polylactide crystallized under quiescent and flow-induced conditions. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.08.021] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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35
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Wei R, Zimmermann W. Biocatalysis as a green route for recycling the recalcitrant plastic polyethylene terephthalate. Microb Biotechnol 2017; 10:1302-1307. [PMID: 28401691 PMCID: PMC5658586 DOI: 10.1111/1751-7915.12714] [Citation(s) in RCA: 143] [Impact Index Per Article: 20.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Revised: 03/16/2017] [Accepted: 03/16/2017] [Indexed: 01/26/2023] Open
Abstract
Biocatalysis can enable a closed‐loop recycling of post‐consumer PET waste.
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Affiliation(s)
- Ren Wei
- Department of Microbiology and Bioprocess Technology, Institute of Biochemistry, Leipzig University, Johannisallee 21-23, 04103, Leipzig, Germany
| | - Wolfgang Zimmermann
- Department of Microbiology and Bioprocess Technology, Institute of Biochemistry, Leipzig University, Johannisallee 21-23, 04103, Leipzig, Germany
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36
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Klonos P, Kulyk K, Borysenko MV, Gun’ko VM, Kyritsis A, Pissis P. Effects of Molecular Weight below the Entanglement Threshold on Interfacial Nanoparticles/Polymer Dynamics. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b01931] [Citation(s) in RCA: 68] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Panagiotis Klonos
- Department of Physics, National Technical University of Athens, Zografou Campus, 15780 Athens, Greece
| | - Kostiantyn Kulyk
- Department of Physics, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Mykola V. Borysenko
- Chuiko Institute of Surface Chemistry, National Academy of Sciences of Ukraine, 17 General Naumov Street, Kiev 03164, Ukraine
| | - Vladimir M. Gun’ko
- Chuiko Institute of Surface Chemistry, National Academy of Sciences of Ukraine, 17 General Naumov Street, Kiev 03164, Ukraine
| | - Apostolos Kyritsis
- Department of Physics, National Technical University of Athens, Zografou Campus, 15780 Athens, Greece
| | - Polycarpos Pissis
- Department of Physics, National Technical University of Athens, Zografou Campus, 15780 Athens, Greece
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37
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Esposito A, Delpouve N, Causin V, Dhotel A, Delbreilh L, Dargent E. From a Three-Phase Model to a Continuous Description of Molecular Mobility in Semicrystalline Poly(hydroxybutyrate-co-hydroxyvalerate). Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b00384] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
| | | | - Valerio Causin
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, 35131 Padova, Italy
| | | | | | - Eric Dargent
- LECAP, Normandie Université-UNIROUEN, Rouen 76000, France
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38
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Then J, Wei R, Oeser T, Gerdts A, Schmidt J, Barth M, Zimmermann W. A disulfide bridge in the calcium binding site of a polyester hydrolase increases its thermal stability and activity against polyethylene terephthalate. FEBS Open Bio 2016; 6:425-32. [PMID: 27419048 PMCID: PMC4856421 DOI: 10.1002/2211-5463.12053] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2016] [Revised: 02/09/2016] [Accepted: 03/02/2016] [Indexed: 11/29/2022] Open
Abstract
Elevated reaction temperatures are crucial for the efficient enzymatic degradation of polyethylene terephthalate (PET). A disulfide bridge was introduced to the polyester hydrolase TfCut2 to substitute its calcium binding site. The melting point of the resulting variant increased to 94.7 °C (wild‐type TfCut2: 69.8 °C) and its half‐inactivation temperature to 84.6 °C (TfCut2: 67.3 °C). The variant D204C‐E253C‐D174R obtained by introducing further mutations at vicinal residues showed a temperature optimum between 75 and 80 °C compared to 65 and 70 °C of the wild‐type enzyme. The variant caused a weight loss of PET films of 25.0 ± 0.8% (TfCut2: 0.3 ± 0.1%) at 70 °C after a reaction time of 48 h. The results demonstrate that a highly efficient and calcium‐independent thermostable polyester hydrolase can be obtained by replacing its calcium binding site with a disulfide bridge.
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Affiliation(s)
- Johannes Then
- Department of Microbiology and Bioprocess Technology Institute of Biochemistry Leipzig University Germany
| | - Ren Wei
- Department of Microbiology and Bioprocess Technology Institute of Biochemistry Leipzig University Germany
| | - Thorsten Oeser
- Department of Microbiology and Bioprocess Technology Institute of Biochemistry Leipzig University Germany
| | - André Gerdts
- Department of Microbiology and Bioprocess Technology Institute of Biochemistry Leipzig University Germany
| | - Juliane Schmidt
- Department of Microbiology and Bioprocess Technology Institute of Biochemistry Leipzig University Germany
| | - Markus Barth
- Department of Microbiology and Bioprocess Technology Institute of Biochemistry Leipzig University Germany
| | - Wolfgang Zimmermann
- Department of Microbiology and Bioprocess Technology Institute of Biochemistry Leipzig University Germany
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39
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Wei R, Oeser T, Schmidt J, Meier R, Barth M, Then J, Zimmermann W. Engineered bacterial polyester hydrolases efficiently degrade polyethylene terephthalate due to relieved product inhibition. Biotechnol Bioeng 2016; 113:1658-65. [DOI: 10.1002/bit.25941] [Citation(s) in RCA: 119] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2015] [Revised: 01/11/2016] [Accepted: 01/19/2016] [Indexed: 11/11/2022]
Affiliation(s)
- Ren Wei
- Department of Microbiology and Bioprocess Technology; Institute of Biochemistry; Leipzig University; Johannisallee 21-23 04103 Leipzig Germany
| | - Thorsten Oeser
- Department of Microbiology and Bioprocess Technology; Institute of Biochemistry; Leipzig University; Johannisallee 21-23 04103 Leipzig Germany
| | - Juliane Schmidt
- Department of Microbiology and Bioprocess Technology; Institute of Biochemistry; Leipzig University; Johannisallee 21-23 04103 Leipzig Germany
| | - René Meier
- Department of Biochemistry and Bioorganic Chemistry; Institute of Biochemistry; Leipzig University; Leipzig Germany
| | - Markus Barth
- Department of Microbiology and Bioprocess Technology; Institute of Biochemistry; Leipzig University; Johannisallee 21-23 04103 Leipzig Germany
| | - Johannes Then
- Department of Microbiology and Bioprocess Technology; Institute of Biochemistry; Leipzig University; Johannisallee 21-23 04103 Leipzig Germany
| | - Wolfgang Zimmermann
- Department of Microbiology and Bioprocess Technology; Institute of Biochemistry; Leipzig University; Johannisallee 21-23 04103 Leipzig Germany
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40
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Kumar B, Negi YS. Synthesis and characterization of poly(potassium 1-hydroxy acrylate) and its derivatives by using different efficient catalysts. POLYMER 2015. [DOI: 10.1016/j.polymer.2015.10.060] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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41
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42
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Pagacz J, Chrzanowski M, Krucińska I, Pielichowski K. Thermal aging and accelerated weathering of PVC/MMT nanocomposites: Structural and morphological studies. J Appl Polym Sci 2015. [DOI: 10.1002/app.42090] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Joanna Pagacz
- Department of Chemistry and Technology of Polymers; Cracow University of Technology; 31-155 Krakow Poland
| | - Michał Chrzanowski
- Department of Material and Commodity Sciences and Textile Metrology; Technical University of Lodz; 90-924 Lodz Poland
| | - Izabella Krucińska
- Department of Material and Commodity Sciences and Textile Metrology; Technical University of Lodz; 90-924 Lodz Poland
| | - Krzysztof Pielichowski
- Department of Chemistry and Technology of Polymers; Cracow University of Technology; 31-155 Krakow Poland
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43
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Vikingsson L, Gómez-Tejedor JA, Gallego Ferrer G, Gómez Ribelles JL. An experimental fatigue study of a porous scaffold for the regeneration of articular cartilage. J Biomech 2015; 48:1310-7. [PMID: 25814177 DOI: 10.1016/j.jbiomech.2015.02.013] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2014] [Revised: 02/12/2015] [Accepted: 02/15/2015] [Indexed: 11/25/2022]
Abstract
The aim of this experimental study is to predict the long-term mechanical behavior of a porous scaffold implanted in a cartilage defect for tissue engineering purpose. Fatigue studies were performed by up to 100,000 unconfined compression cycles in a polycaprolactone (PCL) scaffold with highly interconnected pores architecture. The scaffold compliance, stress-strain response and hysteresis energy have been measured after different number of fatigue cycles, while the morphology has been observed by scanning electron microscopy at the same fatigue times. To simulate the growing tissue in the scaffold/tissue construct, the scaffold was filled with an aqueous solution of polyvinyl alcohol (PVA) and subjected to repeating cycles of freezing and thawing that increase the hydrogel stiffness. Fatigue studies show that the mechanical loading provokes failure of the dry scaffold at a smaller number of deformation cycles than when it is immersed in water, and also that 100,000 compressive dynamic cycles do not affect the scaffold/gel construct. This shows the stability of the scaffold implanted in a chondral defect and gives a realistic simulation of the mechanical performance from implantation of the empty scaffold to regeneration of the new tissue inside the scaffold's pores.
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Affiliation(s)
- L Vikingsson
- Centre for Biomaterials and Tissue Engineering, Universitat Politècnica de València, 46022 Valencia, Spain..
| | - J A Gómez-Tejedor
- Centre for Biomaterials and Tissue Engineering, Universitat Politècnica de València, 46022 Valencia, Spain
| | - G Gallego Ferrer
- Centre for Biomaterials and Tissue Engineering, Universitat Politècnica de València, 46022 Valencia, Spain.; Ciber en Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Valencia, Spain
| | - J L Gómez Ribelles
- Centre for Biomaterials and Tissue Engineering, Universitat Politècnica de València, 46022 Valencia, Spain.; Ciber en Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Valencia, Spain
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44
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Then J, Wei R, Oeser T, Barth M, Belisário-Ferrari MR, Schmidt J, Zimmermann W. Ca2+and Mg2+binding site engineering increases the degradation of polyethylene terephthalate films by polyester hydrolases fromThermobifida fusca. Biotechnol J 2015; 10:592-8. [DOI: 10.1002/biot.201400620] [Citation(s) in RCA: 83] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2014] [Revised: 11/21/2014] [Accepted: 12/22/2014] [Indexed: 11/06/2022]
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45
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Volkov V, Sárria MP, Gomes AC, Cavaco-Paulo A. Phosphorylated Silk Fibroin Matrix for Methotrexate Release. Mol Pharm 2014; 12:75-86. [DOI: 10.1021/mp5004338] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Vadim Volkov
- Centro
de Engenharia Biológica (CEB), Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Marisa P. Sárria
- Centro
de Engenharia Biológica (CEB), Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal
- Centro
de Biologia Molecular e Ambiental (CBMA), Departamento de Biologia, Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Andreia C. Gomes
- Centro
de Biologia Molecular e Ambiental (CBMA), Departamento de Biologia, Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Artur Cavaco-Paulo
- Centro
de Engenharia Biológica (CEB), Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal
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46
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Burgess SK, Mubarak CR, Kriegel RM, Koros WJ. Physical aging in amorphous poly(ethylene furanoate): Enthalpic recovery, density, and oxygen transport considerations. ACTA ACUST UNITED AC 2014. [DOI: 10.1002/polb.23648] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Steven K. Burgess
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology; Atlanta Georgia 30332
| | | | | | - William J. Koros
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology; Atlanta Georgia 30332
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47
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Wei R, Oeser T, Zimmermann W. Synthetic polyester-hydrolyzing enzymes from thermophilic actinomycetes. ADVANCES IN APPLIED MICROBIOLOGY 2014; 89:267-305. [PMID: 25131405 DOI: 10.1016/b978-0-12-800259-9.00007-x] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Thermophilic actinomycetes produce enzymes capable of hydrolyzing synthetic polyesters such as polyethylene terephthalate (PET). In addition to carboxylesterases, which have hydrolytic activity predominantly against PET oligomers, esterases related to cutinases also hydrolyze synthetic polymers. The production of these enzymes by actinomycetes as well as their recombinant expression in heterologous hosts is described and their catalytic activity against polyester substrates is compared. Assays to analyze the enzymatic hydrolysis of synthetic polyesters are evaluated, and a kinetic model describing the enzymatic heterogeneous hydrolysis process is discussed. Structure-function and structure-stability relationships of actinomycete polyester hydrolases are compared based on molecular dynamics simulations and recently solved protein structures. In addition, recent progress in enhancing their activity and thermal stability by random or site-directed mutagenesis is presented.
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Affiliation(s)
- Ren Wei
- Department of Microbiology and Bioprocess Technology, Institute of Biochemistry, University of Leipzig, Leipzig, Germany
| | - Thorsten Oeser
- Department of Microbiology and Bioprocess Technology, Institute of Biochemistry, University of Leipzig, Leipzig, Germany
| | - Wolfgang Zimmermann
- Department of Microbiology and Bioprocess Technology, Institute of Biochemistry, University of Leipzig, Leipzig, Germany.
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48
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Delpouve N, Delbreilh L, Stoclet G, Saiter A, Dargent E. Structural Dependence of the Molecular Mobility in the Amorphous Fractions of Polylactide. Macromolecules 2014. [DOI: 10.1021/ma500839p] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Nicolas Delpouve
- AMME-LECAP
EA 4528 International Lab., Av. de l’Université, BP12,
Normandie Univ. France, Université and INSA Rouen, 76801 St Etienne du Rouvray, France
| | - Laurent Delbreilh
- AMME-LECAP
EA 4528 International Lab., Av. de l’Université, BP12,
Normandie Univ. France, Université and INSA Rouen, 76801 St Etienne du Rouvray, France
| | - Grégory Stoclet
- UMR
CNRS 8207, Unité Matériaux et Transformations, Université
Lille1 Sciences et Technologies, Bâtiment C6, Université de Lille Nord de France, 59655 Villeneuve d’Ascq, France
| | - Allisson Saiter
- AMME-LECAP
EA 4528 International Lab., Av. de l’Université, BP12,
Normandie Univ. France, Université and INSA Rouen, 76801 St Etienne du Rouvray, France
| | - Eric Dargent
- AMME-LECAP
EA 4528 International Lab., Av. de l’Université, BP12,
Normandie Univ. France, Université and INSA Rouen, 76801 St Etienne du Rouvray, France
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49
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Wei R, Oeser T, Then J, Kühn N, Barth M, Schmidt J, Zimmermann W. Functional characterization and structural modeling of synthetic polyester-degrading hydrolases from Thermomonospora curvata. AMB Express 2014; 4:44. [PMID: 25405080 PMCID: PMC4231364 DOI: 10.1186/s13568-014-0044-9] [Citation(s) in RCA: 85] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2014] [Accepted: 04/27/2014] [Indexed: 01/01/2023] Open
Abstract
Thermomonospora curvata is a thermophilic actinomycete phylogenetically related to Thermobifida fusca that produces extracellular hydrolases capable of degrading synthetic polyesters. Analysis of the genome of T. curvata DSM43183 revealed two genes coding for putative polyester hydrolases Tcur1278 and Tcur0390 sharing 61% sequence identity with the T. fusca enzymes. Mature proteins of Tcur1278 and Tcur0390 were cloned and expressed in Escherichia coli TOP10. Tcur1278 and Tcur0390 exhibited an optimal reaction temperature against p-nitrophenyl butyrate at 60°C and 55°C, respectively. The optimal pH for both enzymes was determined at pH 8.5. Tcur1278 retained more than 80% and Tcur0390 less than 10% of their initial activity following incubation for 60 min at 55°C. Tcur0390 showed a higher hydrolytic activity against poly(ε-caprolactone) and polyethylene terephthalate (PET) nanoparticles compared to Tcur1278 at reaction temperatures up to 50°C. At 55°C and 60°C, hydrolytic activity against PET nanoparticles was only detected with Tcur1278. In silico modeling of the polyester hydrolases and docking with a model substrate composed of two repeating units of PET revealed the typical fold of α/β serine hydrolases with an exposed catalytic triad. Molecular dynamics simulations confirmed the superior thermal stability of Tcur1278 considered as the main reason for its higher hydrolytic activity on PET.
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Affiliation(s)
- Ren Wei
- Department of Microbiology and Bioprocess Technology, Institute of Biochemistry, University of Leipzig, Johannisallee 21-23, Leipzig, D-04103, Germany
| | - Thorsten Oeser
- Department of Microbiology and Bioprocess Technology, Institute of Biochemistry, University of Leipzig, Johannisallee 21-23, Leipzig, D-04103, Germany
| | - Johannes Then
- Department of Microbiology and Bioprocess Technology, Institute of Biochemistry, University of Leipzig, Johannisallee 21-23, Leipzig, D-04103, Germany
| | - Nancy Kühn
- Department of Microbiology and Bioprocess Technology, Institute of Biochemistry, University of Leipzig, Johannisallee 21-23, Leipzig, D-04103, Germany
| | - Markus Barth
- Department of Microbiology and Bioprocess Technology, Institute of Biochemistry, University of Leipzig, Johannisallee 21-23, Leipzig, D-04103, Germany
| | - Juliane Schmidt
- Department of Microbiology and Bioprocess Technology, Institute of Biochemistry, University of Leipzig, Johannisallee 21-23, Leipzig, D-04103, Germany
| | - Wolfgang Zimmermann
- Department of Microbiology and Bioprocess Technology, Institute of Biochemistry, University of Leipzig, Johannisallee 21-23, Leipzig, D-04103, Germany
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50
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Wei R, Oeser T, Barth M, Weigl N, Lübs A, Schulz-Siegmund M, Hacker MC, Zimmermann W. Turbidimetric analysis of the enzymatic hydrolysis of polyethylene terephthalate nanoparticles. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.molcatb.2013.08.010] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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