51
|
Chitosan grafted/cross-linked with biodegradable polymers: A review. Int J Biol Macromol 2021; 178:325-343. [PMID: 33652051 DOI: 10.1016/j.ijbiomac.2021.02.200] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 02/24/2021] [Accepted: 02/26/2021] [Indexed: 12/29/2022]
Abstract
Public perception of polymers has been drastically changed with the improved plastic management at the end of their life. However, it is widely recognised the need of developing biodegradable polymers, as an alternative to traditional petrochemical polymers. Chitosan (CH), a biodegradable biopolymer with excellent physiological and structural properties, together with its immunostimulatory and antibacterial activity, is a good candidate to replace other polymers, mainly in biomedical applications. However, CH has also several drawbacks, which can be solved by chemical modifications to improve some of its characteristics such as solubility, biological activity, and mechanical properties. Many chemical modifications have been studied in the last decade to improve the properties of CH. This review focussed on a critical analysis of the state of the art of chemical modifications by cross-linking and graft polymerization, between CH or CH derivatives and other biodegradable polymers (polysaccharides or proteins, obtained from microorganisms, synthetized from biomonomers, or from petrochemical products). Both techniques offer the option of including a wide variety of functional groups into the CH chain. Thus, enhanced and new properties can be obtained in accordance with the requirements for different applications, such as the release of drugs, the improvement of antimicrobial properties of fabrics, the removal of dyes, or as scaffolds to develop bone tissues.
Collapse
|
52
|
Al Rohily K, El-Hamshary H, Ghoneim A, Modaihsh A. Controlled Release of Phosphorus from Superabsorbent Phosphate-Bound Alginate- Graft-Polyacrylamide: Resistance to Soil Cations and Release Mechanism. ACS OMEGA 2020; 5:32919-32929. [PMID: 33403253 PMCID: PMC7774079 DOI: 10.1021/acsomega.0c03740] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Accepted: 11/10/2020] [Indexed: 05/13/2023]
Abstract
Two controlled-released fertilizers of phosphorylated alginate grafted with polyacrylamide (P-Alg-g-PAM) were synthesized. Monoammonium phosphate (MAP) and diammonium phosphate (DAP) were reacted with a matrix of sodium alginate (Alg) and poly(vinyl alcohol) (PVA). The phosphorylated matrix was then grafted with acrylamide. The obtained fertilizer materials showed excellent water absorbance. The controlled-release behavior of phosphorylated alginate grafted with polyacrylamide (P-Alg-g-PAM) was investigated at normal pH and 25 °C. The fertilizer materials exhibited release of phosphorus up to 77% for the MAP sample and up to 57% for the DAP sample till the forty fifth day of the application at pH 7 and 25 °C. More importantly, when the release experiments were conducted in calcium chloride medium, the fertilizers were able to release phosphorus efficiently with slight decrease until the forty fifth day of the application, suggesting that the presence of Alg in the fertilizer formulation may help in extending the duration for which phosphorus is available to the plant.
Collapse
Affiliation(s)
- Khalid Al Rohily
- Department
of Soil Science, College of Food and Agricultural Sciences, King Saud University, P.O. Box-2460, Riyadh 11451, Saudi Arabia
| | - Hany El-Hamshary
- Chemistry
Department, College of Science, King Saud
University, Riyadh 11451, Saudi Arabia
- Department
of Chemistry, Faculty of Science, Tanta
University, Tanta 31527, Egypt
| | - Adel Ghoneim
- Department
of Soil Science, College of Food and Agricultural Sciences, King Saud University, P.O. Box-2460, Riyadh 11451, Saudi Arabia
- Field
Crops Research Institute, Agricultural Research
Center, Giza 12619, Egypt
| | - Abdullah Modaihsh
- Department
of Soil Science, College of Food and Agricultural Sciences, King Saud University, P.O. Box-2460, Riyadh 11451, Saudi Arabia
| |
Collapse
|
53
|
Abstract
AbstractIn order to promote the degradation of PLA in seawater, a series of seawater-degradable polyester blends PVA/PLA were prepared by blending biodegradable polylactic acid (PLA) with water-soluble modified polyvinyl alcohol (PVA) in this paper. ADR 4370S was introduced to bring a certain degree of improvement in compatibility of PVA/PLA blends. The results of degradation test in natural seawater for 180 days show that the weight loss of PVA/PLA blends in seawater is much higher compared with that of pure PLA. PVA can be used as an effective hydrolysis accelerator for PLA matrix, helping to significantly reduce the molecular weight of PLA. The channels caused by dissolution/swelling of PVA facilitate the entry of water and microorganisms into the materials to contact with PLA, thereby promoting the degradation process of PLA matrix itself. Thus, both dissolution/swelling of PVA and degradation of PLA occur in PVA/PLA blends, and the degree of rapid dissolution of PVA in the early stage determines the degree of degradation of PLA.
Collapse
|
54
|
Han WB, Lee JH, Shin JW, Hwang SW. Advanced Materials and Systems for Biodegradable, Transient Electronics. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e2002211. [PMID: 32974973 DOI: 10.1002/adma.202002211] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 07/08/2020] [Indexed: 05/23/2023]
Abstract
Transient electronics refers to an emerging class of advanced technology, defined by an ability to chemically or physically dissolve, disintegrate, and degrade in actively or passively controlled fashions to leave environmentally and physiologically harmless by-products in environments, particularly in bio-fluids or aqueous solutions. The unusual properties that are opposite to operational modes in conventional electronics for a nearly infinite time frame offer unprecedented opportunities in research areas of eco-friendly electronics, temporary biomedical implants, data-secure hardware systems, and others. This review highlights the developments of transient electronics, including materials, manufacturing strategies, electronic components, and transient kinetics, along with various potential applications.
Collapse
Affiliation(s)
- Won Bae Han
- KU-KIST Graduate School of Converging Science and Technology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea
| | - Joong Hoon Lee
- KU-KIST Graduate School of Converging Science and Technology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea
| | - Jeong-Woong Shin
- KU-KIST Graduate School of Converging Science and Technology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea
| | - Suk-Won Hwang
- KU-KIST Graduate School of Converging Science and Technology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea
| |
Collapse
|
55
|
Antifungal Polyvinyl Alcohol Coatings Incorporating Carvacrol for the Postharvest Preservation of Golden Delicious Apple. COATINGS 2020. [DOI: 10.3390/coatings10111027] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Different polyvinyl alcohol (PVA) coating formulations incorporating starch (S) and carvacrol (C) as the active agent were applied to Golden Delicious apples to evaluate their effectiveness at controlling weight loss, respiration rate, fruit firmness, and fungal decay against B. cinerea and P. expansum throughout storage time. Moreover, the impact of these coatings on the sensory attributes of the fruit was also analyzed. The application of the coatings did not notably affect the weight loss, firmness changes, or respiration pathway of apples, probably due to the low solid surface density of the coatings. Nevertheless, they exhibited a highly efficient disease control against both black and green mold growths, as a function of the carvacrol content and distribution in the films. The sensory analysis revealed the great persistence of the carvacrol aroma and flavor in the coated samples, which negatively impact the acceptability of the coated products.
Collapse
|
56
|
Sami DG, Abdellatif A, Azzazy HME. Turmeric/oregano formulations for treatment of diabetic ulcer wounds. Drug Dev Ind Pharm 2020; 46:1613-1621. [PMID: 32806984 DOI: 10.1080/03639045.2020.1811305] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Diabetic wound infections and pressure ulcers pose a significant challenge to healthcare providers worldwide. The current study provides new and innovative wound care products that reduce inflammation, clear infection, and improve healing in an animal model of pressure ulcers in diabetic rats. Ointment, hydrogel, and nanofiber dressings were synthesized using 5% turmeric, 1% oregano, and 1% chitosan nanoparticles and tested for antibacterial and cytotoxicity in vitro, and wound healing effects in vivo. Turmeric ethanolic extract showed high antioxidant activity compared to Oregano, Chitosan Nanoparticles, and Alginate silver (p-value < 0.0001). The ointment and hydrogel formulation (5% Turmeric, 1% Oregano, and 1% chitosan) showed lower cytotoxicity compared to the commercial Alginate silver dressing. Ointment, hydrogel formulations, and commercial Alginate silver, showed significant antibacterial activity with 100% efficacy on both Staphylococcus aureus and Escherichia coli (p-value < 0.0001), compared to nanofibers which showed 50% reduction in bacterial growth (p-value < 0.0001). The new formulations were tested in a rat model of pressure ulcers. Ointment and nanofibers achieved complete wound healing by day 15 compared to the hydrogel and commercial Alginate silver dressing, which showed higher infection, and the wound remained partially open by day 21. In conclusion, Turmeric, Oregano extracts, and chitosan nanoparticles can be used for effective wound dressings in both diabetic and non-diabetic wounds. At relatively low concentrations, this combination provides a promising new wound treatment formulation that is antibacterial, anti-inflammatory, and antioxidant.
Collapse
Affiliation(s)
- Diana G Sami
- Biotechnology Program, School of Sciences and Engineering, the American University in Cairo, New Cairo, Egypt
| | - Ahmed Abdellatif
- Biotechnology Program, School of Sciences and Engineering, the American University in Cairo, New Cairo, Egypt.,Department of Biology, School of Sciences and Engineering, the American University in Cairo, New Cairo, Egypt
| | - Hassan M E Azzazy
- Biotechnology Program, School of Sciences and Engineering, the American University in Cairo, New Cairo, Egypt.,Department of Chemistry, School of Sciences and Engineering, the American University in Cairo, New Cairo, Egypt
| |
Collapse
|
57
|
Li J, Kim HR, Lee HM, Yu HC, Jeon E, Lee S, Kim DH. Rapid biodegradation of polyphenylene sulfide plastic beads by Pseudomonas sp. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 720:137616. [PMID: 32146401 DOI: 10.1016/j.scitotenv.2020.137616] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 02/26/2020] [Accepted: 02/26/2020] [Indexed: 06/10/2023]
Abstract
Pseudomonas sp. isolated from soil, are bioremediating microorganisms that are capable of degrading various types of plastics. Polyphenylene sulfide (PPS) has the most excellent structural stability among general plastics and thus is extremely difficult to break down using physical or chemical methods. This study demonstrates the efficient biodegradation of PPS by Pseudomonas sp., which exists in the gut of superworms. Compared with the conventional film-type of plastic, the degradation efficiencies to the bead form of plastic were significantly improved and thus the biodegradation time was dramatically shortened. Therefore, instead of film-type plastics, we used 300 μm diameter plastic beads for the measurement of Pseudomonas sp.-mediated biodegradation of PPS during a 10-day period. This method not only can be used for comparison and verification of the biodegradation efficiency of different types of plastics within a short reaction time of 10 days, but also provides the possibility to develop a new and more efficient screening system to rapidly identify the most efficient species of bacteria for the biodegradation of various types of plastics.
Collapse
Affiliation(s)
- Jiaojie Li
- Department of Chemistry, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Republic of Korea
| | - Hong Rae Kim
- School of Undergraduate Studies, College of Transdisciplinary Studies, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, Republic of Korea
| | - Hyun Min Lee
- School of Undergraduate Studies, College of Transdisciplinary Studies, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, Republic of Korea
| | - Hee Cheol Yu
- School of Undergraduate Studies, College of Transdisciplinary Studies, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, Republic of Korea
| | - Eunbeen Jeon
- School of Undergraduate Studies, College of Transdisciplinary Studies, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, Republic of Korea
| | - Sukkyoo Lee
- School of Undergraduate Studies, College of Transdisciplinary Studies, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, Republic of Korea
| | - Dae-Hwan Kim
- School of Undergraduate Studies, College of Transdisciplinary Studies, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, Republic of Korea.
| |
Collapse
|
58
|
Hann S, Scholes R, Lee T, Ettlinger S, Jørgensen H. Biobased and Biodegradable Plastics in Denmark. Ind Biotechnol (New Rochelle N Y) 2020. [DOI: 10.1089/ind.2020.29213.sha] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
59
|
Bothamley GH, Spong V. Face-mask sampling or sputum to diagnose lung tuberculosis? THE LANCET. INFECTIOUS DISEASES 2020; 20:520-521. [PMID: 32085851 DOI: 10.1016/s1473-3099(19)30680-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Accepted: 11/26/2019] [Indexed: 06/10/2023]
Affiliation(s)
| | - Viktoria Spong
- TB Team, Homerton University Hospital, London E9 6SR, UK
| |
Collapse
|
60
|
Elshishiny F, Mamdouh W. Fabrication of Nanofibrous/Xerogel Layer-by-Layer Biocomposite Scaffolds for Skin Tissue Regeneration: In Vitro Study. ACS OMEGA 2020; 5:2133-2147. [PMID: 32064374 PMCID: PMC7016933 DOI: 10.1021/acsomega.9b02832] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/02/2019] [Accepted: 01/20/2020] [Indexed: 06/10/2023]
Abstract
Skin burn wounds are a crucial issue that could reduce life quality. Although numerous effective skin products have invaded the biomedical market, most of them still demonstrate some limitations regarding their porosity, swelling and degradation behaviors, antibacterial properties, and cytotoxicity. Thus, the aim of this study is to fabricate novel trilayered asymmetric porous scaffolds that can mimic the natural skin layers. In particular, the fabricated scaffold constitutes an upper electrospun chitosan-poly(vinyl alcohol) layer and a lower xerogel layer, which is made of effective skin extracellular matrix components. Both layers are fixed together using fibrin glue as a middle layer. The results of this study revealed promising scaffold swelling capability suitable for absorbing wound exudates, followed by a constant degradable weight over time, which is appropriate for a burn wound environment. Scanning electron microscopy images revealed an average pore diameter in the range of 138.39-170.18 nm for the cross-linked electrospun mats and an average pore size of 2.29-30.62 μm for the fabricated xerogel layers. This further provided an optimum environment for fibroblast migration and proliferation. The electrospun nanofibrous layer was examined for its antibacterial properties and showed expressive complete bacterial inhibition against Gram-positive (Staphylococcus aureus) and Gram-negative (Escherichia coli) bacterial strains (log reduction = 3 and 2.70, respectively). Next, mouse embryonic fibroblast cytotoxicity and migration rate were investigated against the developed asymmetrical composite to assess its biocompatibility. Tissue culture experiments demonstrated significant cell proliferation and migration in the presence of the constructed scaffold (P < 0.0001). A complete wound closure was observed in vitro in the presence of the three scaffold asymmetrical layers against the mouse embryonic fibroblast. The results of this study proved superior biological characteristics of the innovative asymmetrical composite that could further replace the burned or damaged skin layers with promising potential for clinical applications.
Collapse
Affiliation(s)
| | - Wael Mamdouh
- E-mail: . Tel: +202
2615 2555. Fax: +202 2797 4951
| |
Collapse
|
61
|
Wang G, Huang D, Ji J, Völker C, Wurm FR. Seawater-Degradable Polymers-Fighting the Marine Plastic Pollution. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2020; 8:2001121. [PMID: 33437568 PMCID: PMC7788598 DOI: 10.1002/advs.202001121] [Citation(s) in RCA: 104] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 08/31/2020] [Indexed: 05/06/2023]
Abstract
Polymers shape human life but they also have been identified as pollutants in the oceans due to their long lifetime and low degradability. Recently, various researchers have studied the impact of (micro)plastics on marine life, biodiversity, and potential toxicity. Even if the consequences are still heavily discussed, prevention of unnecessary waste is desired. Especially, newly designed polymers that degrade in seawater are discussed as potential alternatives to commodity polymers in certain applications. Biodegradable polymers that degrade in vivo (used for biomedical applications) or during composting often exhibit too slow degradation rates in seawater. To date, no comprehensive summary for the degradation performance of polymers in seawater has been reported, nor are the studies for seawater-degradation following uniform standards. This review summarizes concepts, mechanisms, and other factors affecting the degradation process in seawater of several biodegradable polymers or polymer blends. As most of such materials cannot degrade or degrade too slowly, strategies and innovative routes for the preparation of seawater-degradable polymers with rapid degradation in natural environments are reviewed. It is believed that this selection will help to further understand and drive the development of seawater-degradable polymers.
Collapse
Affiliation(s)
- Ge‐Xia Wang
- National Engineering Research Center of Engineering PlasticsTechnical Institute of Physics and ChemistryThe Chinese Academy of SciencesBeijing100190P. R. China
| | - Dan Huang
- National Engineering Research Center of Engineering PlasticsTechnical Institute of Physics and ChemistryThe Chinese Academy of SciencesBeijing100190P. R. China
- University of Chinese Academy of SciencesBeijing100049P. R. China
| | - Jun‐Hui Ji
- National Engineering Research Center of Engineering PlasticsTechnical Institute of Physics and ChemistryThe Chinese Academy of SciencesBeijing100190P. R. China
| | - Carolin Völker
- ISOE – Institute for Social‐Ecological ResearchHamburger Allee 45Frankfurt60486Germany
| | - Frederik R. Wurm
- Max‐Planck‐Institut für PolymerforschungAckermannweg 10Mainz55128Germany
- Sustainable Polymer Chemistry GroupMESA+ Institute for Nanotechnology, Faculty of Science and Technology, Universiteit TwentePO Box 217Enschede7500 AEThe Netherlands
| |
Collapse
|
62
|
A GK, K A, M H, K S, G D. Review on plastic wastes in marine environment - Biodegradation and biotechnological solutions. MARINE POLLUTION BULLETIN 2020; 150:110733. [PMID: 31767203 DOI: 10.1016/j.marpolbul.2019.110733] [Citation(s) in RCA: 69] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Revised: 11/13/2019] [Accepted: 11/13/2019] [Indexed: 05/23/2023]
Abstract
The marine plastic pollution has drastic effect on marine species. The importance in environmental issues increases the demand to develop a significant technology which does not burden the marine environment or marine life forms. To mitigate the foreseen problems of micro and nanoplastic contamination, different biotechnological solutions has to be considered. Microbial communities exposed to plastic contaminated sites can adapt and form dense biofilms on the plastic surface and produce active catalytic enzymes. These enzymes can be able to degrade the synthetic polymers. In view of their high catalytic activity, microbial enzymes can be applicable for the degradation of synthetic polymers. This review highlights the toxicity of micro and nanoplastics on marine organisms, biodegradation of plastics and futuristic research needs to solve the issues of plastic pollution in marine environment.
Collapse
Affiliation(s)
- Ganesh Kumar A
- Marine Biotechnology Division, Earth System Science Organization - National Institute of Ocean Technology (ESSO - NIOT), Ministry of Earth Sciences (MoES), Government of India, Pallikaranai, Chennai, 600100, India.
| | - Anjana K
- Marine Biotechnology Division, Earth System Science Organization - National Institute of Ocean Technology (ESSO - NIOT), Ministry of Earth Sciences (MoES), Government of India, Pallikaranai, Chennai, 600100, India
| | - Hinduja M
- Marine Biotechnology Division, Earth System Science Organization - National Institute of Ocean Technology (ESSO - NIOT), Ministry of Earth Sciences (MoES), Government of India, Pallikaranai, Chennai, 600100, India
| | - Sujitha K
- Marine Biotechnology Division, Earth System Science Organization - National Institute of Ocean Technology (ESSO - NIOT), Ministry of Earth Sciences (MoES), Government of India, Pallikaranai, Chennai, 600100, India
| | - Dharani G
- Marine Biotechnology Division, Earth System Science Organization - National Institute of Ocean Technology (ESSO - NIOT), Ministry of Earth Sciences (MoES), Government of India, Pallikaranai, Chennai, 600100, India
| |
Collapse
|
63
|
Thakur K, Rajhans A, Kandasubramanian B. Starch/PVA hydrogels for oil/water separation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:32013-32028. [PMID: 31493081 DOI: 10.1007/s11356-019-06327-z] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Accepted: 08/26/2019] [Indexed: 05/06/2023]
Abstract
PVA polymers have been well-known as water-absorbing materials but their brittle nature hinders their applicability. In this study, we enhanced the strength of hydrogel and its water-absorbing capabilities by glutaraldehyde-assisted crosslinking of starch with PVA and blending BMIM-BF4 to enhance the plasticity and generate porosity within the hydrogel multiplying the swelling capacity up to 300% and understand the kinetics and mechanism of water absorption based on the structure of the hydrogel. The ability of starch/PVA hydrogel to selectively adsorb water from oil-water emulsions was determined by establishing the underwater oleophobic nature (oil contact angle ~ 153.6°), subjecting the hydrogel to oil-water emulsion to determine the water absorbed. The hydrogels' biodegradable nature was tested by an efficient in-house biotic system and mechanisms for biodegradation have been discussed. The biodegradability (~ 90%) was determined for 50% starch in PVA sample in 28 days. These properties observed in the hydrogels will find applications in irrigating arid and semi-arid areas and also in developing superabsorbent hydrogels for hygiene-related product development etc. which can be biodegraded in an economic way. Graphical abstract.
Collapse
Affiliation(s)
- Kirti Thakur
- Department of Atomic and Molecular Physics, Manipal Academy of Higher Education (MAHE), Manipal, India
| | - Aditya Rajhans
- Department of Chemical Engineering, National Institute of Technology, Rourkela, India
| | - Balasubramanian Kandasubramanian
- Nano Surface Texturing Lab, Department of Metallurgical & Materials Engineering, DIAT (DU), Ministry of Defence, Girinagar, Pune, India.
| |
Collapse
|
64
|
Ullah M, Li H, Sun SW, Weng CH, Zhang H, Zhu H. Polyvinyl alcohol degradation by Bacillus cereus RA23 from oil sludge sample. 3 Biotech 2019; 9:350. [PMID: 31501751 PMCID: PMC6722167 DOI: 10.1007/s13205-019-1882-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Accepted: 08/22/2019] [Indexed: 10/26/2022] Open
Abstract
A novel polyvinyl alcohol (PVA)-degrading strain Bacillus cereus RA23 was isolated from an oil sludge sample and environmental factors affecting its PVA degradation efficiency were optimized in detail. Inorganic nitrogen source, ammonium chloride (NH4Cl), was found to be the best nitrogen source and enhanced the PVA degradation rate greatly. The optimal medium for PVA biodegradation consisted of (g/L) PVA 1, NH4Cl 1, K2HPO4 1.6, MgSO4·7H2O 0.05, FeSO4·6H2O 0.02, CaCl2 0.05, NaCl 0.02. The optimal temperature and pH for PVA biodegradation by strain RA23 was 28 °C and 7.0, respectively, and 85% of 0.1% PVA was degraded after 5 days under these conditions. FTIR studies showed that the carboxylic acids (possibly including aldehyde or ketone) could be the intermediate product of PVA biodegradation. The investigation of strain RA23 for PVA degradation will provide important information to facilitate the removal of wastewater pollution in industrial zones.
Collapse
Affiliation(s)
- Munzer Ullah
- Centre for Bioengineering and Biotechnology, China University of Petroleum (East China), 66 Changjiang West Road, Qingdao, 266580 People’s Republic of China
| | - Hui Li
- Centre for Bioengineering and Biotechnology, China University of Petroleum (East China), 66 Changjiang West Road, Qingdao, 266580 People’s Republic of China
| | - Shi-Wei Sun
- Centre for Bioengineering and Biotechnology, China University of Petroleum (East China), 66 Changjiang West Road, Qingdao, 266580 People’s Republic of China
| | - Cai-Hong Weng
- Centre for Bioengineering and Biotechnology, China University of Petroleum (East China), 66 Changjiang West Road, Qingdao, 266580 People’s Republic of China
| | - Hong Zhang
- Centre for Bioengineering and Biotechnology, China University of Petroleum (East China), 66 Changjiang West Road, Qingdao, 266580 People’s Republic of China
| | - Hu Zhu
- Centre for Bioengineering and Biotechnology, China University of Petroleum (East China), 66 Changjiang West Road, Qingdao, 266580 People’s Republic of China
- Fujian Provincial Key Laboratory of Advanced Materials Oriented Chemical Engineering, Fujian Provincial University Engineering Research Center of Industrial Biocatalysis, College of Chemistry and Materials Science, Fujian Normal University, 32 Shangsan Road, Fuzhou, 350007 People’s Republic of China
| |
Collapse
|
65
|
Deng Y, Wang C, Liu Y, Chen P, Lin X, Zhang Y. The first demonstration of a novel isolated fungus Eutypella sp. BJ associated with the biodegradation of polyvinyl alcohol. RSC Adv 2019; 9:27398-27405. [PMID: 35529236 PMCID: PMC9070661 DOI: 10.1039/c9ra04410h] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Accepted: 08/25/2019] [Indexed: 12/02/2022] Open
Abstract
The aim of this work is to study the potential degradation of polyvinyl alcohol (PVA) by a novel fungus Eutypella sp. BJ isolated from soil compost. When it was cultured on a semi-synthetic medium containing PVA at 30 °C and 160 rpm for 8 days, the removal rates of PVA 1788, 1799 and 2488 reached 87.40%, 86.31% and 44.80%, respectively. Gel permeation chromatography (GPC) analysis revealed significant reductions of the number average molecular weight and the weight average molecular weight of PVA 1788 from 47 358 to 13 345 and from 71 387 to 24 238, respectively, after 8 days. Fourier transform infrared spectroscopy (FTIR) indicated that some substances containing carbonyl groups (likely aldehydes or ketones) might have been produced during the biodegradation process. These results indicate that the isolate has potential for degrading PVA. This study provides the first demonstration that Eutypella has the ability to assimilate PVA. An isolated fungus Eutypella sp. BJ is firstly demonstrated to have the ability to degrade polyvinyl alcohol.![]()
Collapse
Affiliation(s)
- Yiling Deng
- School of Biology and Biological Engineering, South China University of Technology No. 382 Waihuan East Rd., Guangzhou University City, Panyu District Guangzhou 510006 Guangdong China +86-20-39380602 +86-20-39380601
| | - Chenyuan Wang
- School of Biology and Biological Engineering, South China University of Technology No. 382 Waihuan East Rd., Guangzhou University City, Panyu District Guangzhou 510006 Guangdong China +86-20-39380602 +86-20-39380601
| | - Yalan Liu
- School of Biology and Biological Engineering, South China University of Technology No. 382 Waihuan East Rd., Guangzhou University City, Panyu District Guangzhou 510006 Guangdong China +86-20-39380602 +86-20-39380601
| | - Ping Chen
- School of Biology and Biological Engineering, South China University of Technology No. 382 Waihuan East Rd., Guangzhou University City, Panyu District Guangzhou 510006 Guangdong China +86-20-39380602 +86-20-39380601
| | - Xiaoshan Lin
- School of Biology and Biological Engineering, South China University of Technology No. 382 Waihuan East Rd., Guangzhou University City, Panyu District Guangzhou 510006 Guangdong China +86-20-39380602 +86-20-39380601
| | - Yi Zhang
- School of Biology and Biological Engineering, South China University of Technology No. 382 Waihuan East Rd., Guangzhou University City, Panyu District Guangzhou 510006 Guangdong China +86-20-39380602 +86-20-39380601
| |
Collapse
|
66
|
Catalysis mechanism of oxidized polyvinyl alcohol by pseudomonas hydrolase: Insights from molecular dynamics and QM/MM analysis. Chem Phys Lett 2019. [DOI: 10.1016/j.cplett.2019.02.023] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
67
|
Bioinformatics Analysis and Characterization of Highly Efficient Polyvinyl Alcohol (PVA)-Degrading Enzymes from the Novel PVA Degrader Stenotrophomonas rhizophila QL-P4. Appl Environ Microbiol 2017; 84:AEM.01898-17. [PMID: 29079625 DOI: 10.1128/aem.01898-17] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Accepted: 10/23/2017] [Indexed: 01/24/2023] Open
Abstract
Polyvinyl alcohol (PVA) is used widely in industry, and associated environmental pollution is a serious problem. Herein, we report a novel, efficient PVA degrader, Stenotrophomonas rhizophila QL-P4, isolated from fallen leaves from a virgin forest in the Qinling Mountains. The complete genome was obtained using single-molecule real-time (SMRT) technology and corrected using Illumina sequencing. Bioinformatics analysis revealed eight PVA/vinyl alcohol oligomer (OVA)-degrading genes. Of these, seven genes were predicted to be involved in the classic intracellular PVA/OVA degradation pathway, and one (BAY15_3292) was identified as a novel PVA oxidase. Five PVA/OVA-degrading enzymes were purified and characterized. One of these, BAY15_1712, a PVA dehydrogenase (PVADH), displayed high catalytic efficiency toward PVA and OVA substrate. All reported PVADHs only have PVA-degrading ability. Most importantly, we discovered a novel PVA oxidase (BAY15_3292) that exhibited higher PVA-degrading efficiency than the reported PVADHs. Further investigation indicated that BAY15_3292 plays a crucial role in PVA degradation in S. rhizophila QL-P4. Knocking out BAY15_3292 resulted in a significant decline in PVA-degrading activity in S. rhizophila QL-P4. Interestingly, we found that BAY15_3292 possesses exocrine activity, which distinguishes it from classic PVADHs. Transparent circle experiments further proved that BAY15_3292 greatly affects extracellular PVA degradation in S. rhizophila QL-P4. The exocrine characteristics of BAY15_3292 facilitate its potential application to PVA bioremediation. In addition, we report three new efficient secondary alcohol dehydrogenases (SADHs) with OVA-degrading ability in S. rhizophila QL-P4; in contrast, only one OVA-degrading SADH was reported previously.IMPORTANCE With the widespread application of PVA in industry, PVA-related environmental pollution is an increasingly serious issue. Because PVA is difficult to degrade, it accumulates in aquatic environments and causes chronic toxicity to aquatic organisms. Biodegradation of PVA, as an economical and environment-friendly method, has attracted much interest. To date, effective and applicable PVA-degrading bacteria/enzymes have not been reported. Herein, we report a new efficient PVA degrader (S. rhizophila QL-P4) that has five PVA/OVA-degrading enzymes with high catalytic efficiency, among which BAY15_1712 is the only reported PVADH with both PVA- and OVA-degrading abilities. Importantly, we discovered a novel PVA oxidase (BAY15_3292) that is not only more efficient than other reported PVA-degrading PVADHs but also has exocrine activity. Overall, our findings provide new insight into PVA-degrading pathways in microorganisms and suggest S. rhizophila QL-P4 and its enzymes have the potential for application to PVA bioremediation to reduce or eliminate PVA-related environmental pollution.
Collapse
|
68
|
Wilkes RA, Aristilde L. Degradation and metabolism of synthetic plastics and associated products by Pseudomonas sp.: capabilities and challenges. J Appl Microbiol 2017; 123:582-593. [PMID: 28419654 DOI: 10.1111/jam.13472] [Citation(s) in RCA: 201] [Impact Index Per Article: 28.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Revised: 03/17/2017] [Accepted: 04/10/2017] [Indexed: 11/27/2022]
Abstract
Synthetic plastics, which are widely present in materials of everyday use, are ubiquitous and slowly-degrading polymers in environmental wastes. Of special interest are the capabilities of microorganisms to accelerate their degradation. Members of the metabolically diverse genus Pseudomonas are of particular interest due to their capabilities to degrade and metabolize synthetic plastics. Pseudomonas species isolated from environmental matrices have been identified to degrade polyethylene, polypropylene, polyvinyl chloride, polystyrene, polyurethane, polyethylene terephthalate, polyethylene succinate, polyethylene glycol and polyvinyl alcohol at varying degrees of efficiency. Here, we present a review of the current knowledge on the factors that control the ability of Pseudomonas sp. to process these different plastic polymers and their by-products. These factors include cell surface attachment within biofilms, catalytic enzymes involved in oxidation or hydrolysis of the plastic polymer, metabolic pathways responsible for uptake and assimilation of plastic fragments and chemical factors that are advantageous or inhibitory to the biodegradation process. We also highlight future research directions required in order to harness fully the capabilities of Pseudomonas sp. in bioremediation strategies towards eliminating plastic wastes.
Collapse
Affiliation(s)
- R A Wilkes
- Department of Biological and Environmental Engineering, College of Agriculture and Life Sciences, Cornell University, Ithaca, NY, USA
| | - L Aristilde
- Department of Biological and Environmental Engineering, College of Agriculture and Life Sciences, Cornell University, Ithaca, NY, USA
| |
Collapse
|
69
|
Pathak VM, Navneet. Review on the current status of polymer degradation: a microbial approach. BIORESOUR BIOPROCESS 2017. [DOI: 10.1186/s40643-017-0145-9] [Citation(s) in RCA: 308] [Impact Index Per Article: 44.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
|
70
|
Performance and diversity of polyvinyl alcohol-degrading bacteria under aerobic and anaerobic conditions. Biotechnol Lett 2016; 38:1875-1880. [DOI: 10.1007/s10529-016-2174-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Accepted: 07/06/2016] [Indexed: 10/21/2022]
|
71
|
Chung J, Kim S, Choi K, Kim JO. Degradation of polyvinyl alcohol in textile waste water by Microbacterium barkeri KCCM 10507 and Paenibacillus amylolyticus KCCM 10508. ENVIRONMENTAL TECHNOLOGY 2016; 37:452-458. [PMID: 26000781 DOI: 10.1080/09593330.2015.1054257] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Microbacterium barkeri KCCM 10507 and Paenibacillus amylolyticus KCCM 10508 were isolated and identified for the degradation of polyvinyl alcohol (PVA) contained in textile waste water. Kinetic parameters such as growth rate and substrate utilization rate were determined using a pure culture of two isolated strains. The degradation rate by a mixed culture of two isolated strains was higher than that by single strain only. Also, the effect of polymerization degree on biodegradation was negligible, but initial PVA concentration was very sensitive to biodegradation. Forty-two per cent of PVA and 55% of chemical oxygen demand in textile waste water were removed by a mixed culture of two isolated strains after 5 days.
Collapse
Affiliation(s)
- Jinwook Chung
- a R&D Center, Samsung Engineering Co. Ltd ., 415-10 Woncheon-Dong, Youngtong-Gu, Suwon , Gyeonggi-Do 443-823 , Republic of Korea
| | - Seungjin Kim
- a R&D Center, Samsung Engineering Co. Ltd ., 415-10 Woncheon-Dong, Youngtong-Gu, Suwon , Gyeonggi-Do 443-823 , Republic of Korea
| | - Kwangkeun Choi
- b Central Research Center , Green and Global In Tech Co. Ltd ., U-Tower 910 2039, Youngduk-Dong, Kiheung-Gu , Gyeonngi-Do 446-908 , Republic of Korea
| | - Jong-Oh Kim
- c Department of Civil and Environmental Engineering , Hanyang University , 222 Wangsimni-Ro, Seongdong-Gu , Seoul , 133-791 , Republic of Korea
| |
Collapse
|
72
|
Ben Halima N. Poly(vinyl alcohol): review of its promising applications and insights into biodegradation. RSC Adv 2016. [DOI: 10.1039/c6ra05742j] [Citation(s) in RCA: 160] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Poly(vinyl alcohol) is a promising class of synthetic polymer biodegradable under a two-step metabolism consisting of an oxidation and hydrolysis.
Collapse
|
73
|
Complete Genome Sequence of Polyvinyl Alcohol-Degrading Strain Sphingopyxis sp. 113P3 (NBRC 111507). GENOME ANNOUNCEMENTS 2015; 3:3/5/e01169-15. [PMID: 26472829 PMCID: PMC4611681 DOI: 10.1128/genomea.01169-15] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Strain 113P3 was isolated from activated sludge and identified as a polyvinyl alcohol (PVA)-degrading Pseudomonas species; it was later reidentified as Sphingopyxis species. Only three genes are directly relevant to the metabolism of PVA and comprise the pva operon, which was deposited as accession no. AB190228. Here, we report the complete genome sequence of strain 113P3, which has been conserved as a stock culture (NBRC 111507) at the Biological Resource Center, National Institute of Technology and Evaluation (NITE) (Tokyo, Japan). The genome of strain 113P3 is composed of a 4.4-Mb circular chromosome and a 243-kb plasmid. The whole finishing was conducted in silico except for four PCRs. The sequence corresponding to AB190288 exists on the chromosome.
Collapse
|
74
|
Potential of Wood-Rotting Fungi to Attack Polystyrene Sulfonate and Its Depolymerisation by Gloeophyllum trabeum via Hydroquinone-Driven Fenton Chemistry. PLoS One 2015; 10:e0131773. [PMID: 26147966 PMCID: PMC4493105 DOI: 10.1371/journal.pone.0131773] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2015] [Accepted: 06/05/2015] [Indexed: 11/19/2022] Open
Abstract
Synthetic polymers often pose environmental hazards due to low biodegradation rates and resulting accumulation. In this study, a selection of wood-rotting fungi representing different lignocellulose decay types was screened for oxidative biodegradation of the polymer polystyrene sulfonate (PSS). Brown-rot basidiomycetes showed PSS depolymerisation of up to 50 % reduction in number-average molecular mass (Mn) within 20 days. In-depth investigations with the most efficient depolymeriser, a Gloeophyllum trabeum strain, pointed at extracellular hydroquinone-driven Fenton chemistry responsible for depolymerisation. Detection of hydroxyl radicals present in the culture supernatants showed good compliance with depolymerisation over the time course of PSS degradation. 2,5-Dimethoxy-1,4-hydroquinone (2,5-DMHQ), which was detected in supernatants of active cultures via liquid chromatography and mass spectrometry, was demonstrated to drive the Fenton processes in G. trabeum cultures. Up to 80% reduction in Mn of PSS where observed when fungal cultures were additionally supplemented with 2,5-dimethoxy benzoquinone, the oxidized from of 2,5-DMHQ. Furthermore, 2,5-DMHQ could initiate the Fenton's reagent-mediated PSS depolymerisation in cell-free systems. In contrast, white-rot fungi were unable to cause substantial depolymerising effects despite the expression of lignin-modifying exo-enzymes. Detailed investigations with laccase from Trametes versicolor revealed that only in presence of certain redox mediators limited PSS depolymerisation occurred. Our results indicate that brown-rot fungi might be suitable organisms for the biodegradation of recalcitrant synthetic polymeric pollutants.
Collapse
|
75
|
Filimon A, Dobos AM, Avram E, Ioan S. Ionic polymers based on quaternized polysulfones: hydrodynamic properties of polymer mixtures in solution. PURE APPL CHEM 2014. [DOI: 10.1515/pac-2014-0603] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Hydrodynamic properties developed in a series of mixtures, obtained from quaternized polysulfone and cellulose acetate phthalate or polyvinyl alcohol in N-methyl-2-pyrrolidone, were evaluated by viscometric investigations. Theoretical and experimental aspects concerning the viscometric data for binary polymer/solvent and ternary polymer/polymer/solvent mixtures have been discussed by the new Wolf model, as a function of the charge density of polyion, structural peculiarity of polymers, and polymer mixture composition. Intrinsic viscosity and also the hydrodynamic parameters obtained by the Wolf method offer new information on the competition between different types of interactions manifested in ternary polymer/polymer/solvent systems. The complex dependence of viscosity on polymer composition is influenced by conformational changes of constituent polymers from the mixture, as well as by cumulative effects of electrostatic interactions, hydrogen bonding or association phenomena. Additionally, the above-mentioned interactions indicate the compatibility of these polymers over a large composition domain. This study investigates the hydrodynamic functions from the perspective of some newly-issued theories and analyzes the choice of optimal polymer mixtures compositions for specific applications in biomedical domains.
Collapse
|
76
|
Yang Y, Ko TP, Liu L, Li J, Huang CH, Chen J, Guo RT, Du G. Roles of tryptophan residue and disulfide bond in the variable lid region of oxidized polyvinyl alcohol hydrolase. Biochem Biophys Res Commun 2014; 452:509-14. [DOI: 10.1016/j.bbrc.2014.08.106] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2014] [Accepted: 08/20/2014] [Indexed: 11/30/2022]
|
77
|
Preparation method and physical, mechanical, thermal characterization of poly(vinyl alcohol)/poly(acrylic acid) blends. Polym Bull (Berl) 2014. [DOI: 10.1007/s00289-014-1221-3] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
78
|
Yang Y, Ko TP, Liu L, Li J, Huang CH, Chan HC, Ren F, Jia D, Wang AHJ, Guo RT, Chen J, Du G. Structural insights into enzymatic degradation of oxidized polyvinyl alcohol. Chembiochem 2014; 15:1882-6. [PMID: 25044912 DOI: 10.1002/cbic.201402166] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2014] [Indexed: 11/08/2022]
Abstract
The ever-increasing production and use of polyvinyl alcohol (PVA) threaten our environment. Yet PVA can be assimilated by microbes in two steps: oxidation and cleavage. Here we report novel α/β-hydrolase structures of oxidized PVA hydrolase (OPH) from two known PVA-degrading organisms, Sphingopyxis sp. 113P3 and Pseudomonas sp. VM15C, including complexes with substrate analogues, acetylacetone and caprylate. The active site is covered by a lid-like β-ribbon. Unlike other esterase and amidase, OPH is unique in cleaving the CC bond of β-diketone, although it has a catalytic triad similar to that of most α/β-hydrolases. Analysis of the crystal structures suggests a double-oxyanion-hole mechanism, previously only found in thiolase cleaving β-ketoacyl-CoA. Three mutations in the lid region showed enhanced activity, with potential in industrial applications.
Collapse
Affiliation(s)
- Yu Yang
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Lihu Ave. 1800, Wuxi 214122 (China)
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
79
|
Nogi Y, Yoshizumi M, Hamana K, Miyazaki M, Horikoshi K. Povalibacter uvarum gen. nov., sp. nov., a polyvinyl-alcohol-degrading bacterium isolated from grapes. Int J Syst Evol Microbiol 2014; 64:2712-2717. [PMID: 24844263 DOI: 10.1099/ijs.0.062620-0] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Polyvinyl-alcohol-degrading bacteria were isolated from the fruit of a grape in Yokosuka, Japan. The isolated strain, Zumi 37(T), was a Gram-stain-negative, rod-shaped, motile, non-spore-forming and strictly aerobic chemo-organotroph, showing optimal growth at pH 7.5, 30 °C and 0.1% (w/v) NaCl. The major respiratory quinone was Q-8. The predominant fatty acids were iso-C(15 : 0), C(16 : 0) and C(16 : 1)ω7c. The major polyamines were homospermidine and putrescine. The predominant polar lipids were diphosphatidylglycerol, phosphatidylglycerol and phosphatidylethanolamine. The DNA G+C content of the novel strain was 64.2 mol%. 16S rRNA gene sequence comparison revealed that strain Zumi 37(T) belongs to the family Sinobacteraceae within the class Gammaproteobacteria. Steroidobacter denitrificans DSM 18526(T) was the most closely related species with a validly published name, with 98.0% similarity based on 16S rRNA gene sequence comparison (and showed less than 87.5% sequence similarity to members of the genera Alkanibacter, Fontimonas, Hydrocarboniphaga, Nevskia and Solimonas with known 16S rRNA gene sequences). Phenotypes for growth under aerobic conditions and on complex media and major fatty acid composition, differed greatly from those of with comparatively high 16S rRNA gene sequence similarity. Based on phylogenetic, phenotypic and chemotaxonomic evidence, it is proposed that strain Zumi 37(T) represents a novel species in a new genus for which the name Povalibacter uvarum gen. nov., sp. nov. is proposed. The type strain of the type species is Zumi 37(T) ( = JCM 18749(T) = DSM 26723(T)).
Collapse
Affiliation(s)
- Yuichi Nogi
- International Graduate School of Arts and Sciences, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama 236-0027, Japan.,Research and Development Center for Marine Biosciences, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka 237-0061, Japan
| | - Masaki Yoshizumi
- International Graduate School of Arts and Sciences, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama 236-0027, Japan.,Research and Development Center for Marine Biosciences, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka 237-0061, Japan
| | - Koei Hamana
- Faculty of Engineering, Maebashi Institute of Technology, Gunma 371-0816, Japan
| | - Masayuki Miyazaki
- Research and Development Center for Marine Biosciences, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka 237-0061, Japan
| | - Koki Horikoshi
- Research and Development Center for Marine Biosciences, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka 237-0061, Japan
| |
Collapse
|
80
|
Filimon A, Avram E, Stoica I. Rheological and morphological characteristics of multicomponent polysulfone/poly(vinyl alcohol) systems. POLYM INT 2014. [DOI: 10.1002/pi.4716] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Anca Filimon
- ‘Petru Poni’ Institute of Macromolecular Chemistry; Physical Chemistry of Polymers Department; 41A Gr. Ghica Voda Alley 700487 Iasi Romania
| | - Ecaterina Avram
- ‘Petru Poni’ Institute of Macromolecular Chemistry; Physical Chemistry of Polymers Department; 41A Gr. Ghica Voda Alley 700487 Iasi Romania
| | - Iuliana Stoica
- ‘Petru Poni’ Institute of Macromolecular Chemistry; Physical Chemistry of Polymers Department; 41A Gr. Ghica Voda Alley 700487 Iasi Romania
| |
Collapse
|
81
|
Jia D, Yang Y, Peng Z, Zhang D, Li J, Liu L, Du G, Chen J. High efficiency preparation and characterization of intact poly(vinyl alcohol) dehydrogenase from Sphingopyxis sp.113P3 in Escherichia coli by inclusion bodies renaturation. Appl Biochem Biotechnol 2014; 172:2540-51. [PMID: 24402569 DOI: 10.1007/s12010-013-0703-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2013] [Accepted: 12/25/2013] [Indexed: 11/25/2022]
Abstract
Poly(vinyl alcohol) dehydrogenase (PVADH, EC 1.1.99.23) is an enzyme which has potential application in textile industry to degrade the poly(vinyl alcohol) (PVA) in waste water. Previously, a 1,965-bp fragment encoding a PVADH from Sphingopyxis sp. 113P3 was synthesized based on the replacement of the rare codons in Escherichia coli (E. coli). In this work, the deduced mature PVADH (mPVADH) gene of 1,887 bp was amplified by polymerase chain reaction (PCR) and inserted into the site between NcoI and HindIII in pET-32a(+). The constructed recombinant plasmid was transformed into E. coli Rosetta (DE3). In shake flask, the fusion protein of thioredoxin (Trx)-mPVADH was expressed precisely; however, Trx-mPVADH was found to accumulate mainly as inclusion bodies. After isolating, dissolving in buffer containing urea, purification, dialysis renaturation, and digesting with recombinant enterokinase/His (rEK/His), the bioactive mPVADH fragments were obtained with protein concentration of 0.56 g/L and enzymatic activity of 194 U/mL. The K m and V max values for PVA 1799 were 2.33 mg/mL and 15.7 nmol/(min·mg protein), respectively. (1)H-NMR and infrared (IR) spectrum demonstrated that its biological function was oxidizing hydroxyl groups of PVA 1799 to form diketone, and PVA 1799 could be degraded completely by successive treatment with mPVADH and oxidized PVA hydrolase (OPH).
Collapse
Affiliation(s)
- Dongxu Jia
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi, 214122, China,
| | | | | | | | | | | | | | | |
Collapse
|
82
|
Nogi Y, Yoshizumi M, Miyazaki M. Thalassospira povalilytica sp. nov., a polyvinyl-alcohol-degrading marine bacterium. Int J Syst Evol Microbiol 2014; 64:1149-1153. [PMID: 24408523 DOI: 10.1099/ijs.0.058321-0] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A polyvinyl-alcohol-degrading marine bacterium was isolated from plastic rope litter found in Tokyo Bay, Japan. The isolated strain, Zumi 95(T), was a Gram-reaction-negative, non-spore-forming and facultatively anaerobic chemo-organotroph. The major respiratory quinone was Q-10. The predominant fatty acids were C18 : 1ω7c and C16 : 0. On the basis of 16S rRNA gene sequence analysis, the isolated strain was closely affiliated with members of the genus Thalassospira in the class Alphaproteobacteria. The DNA G+C content of the novel strain was 55.1 mol%. The hybridization values for DNA-DNA relatedness between this strain and four reference strains representing species of the genus Thalassospira were significantly lower than that accepted as the phylogenetic definition of a species. On the basis of differences in taxonomic characteristics, the isolated strain represents a novel species of the genus Thalassospira for which the name Thalassospira povalilytica sp. nov. (type strain Zumi 95(T) = JCM 18746(T) = DSM 26719(T)) is proposed.
Collapse
Affiliation(s)
- Yuichi Nogi
- International Graduate School of Arts and Sciences, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama 236-0027, Japan
- Extremobiosphere Research Program, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka 237-0061, Japan
| | - Masaki Yoshizumi
- International Graduate School of Arts and Sciences, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama 236-0027, Japan
- Extremobiosphere Research Program, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka 237-0061, Japan
| | - Masayuki Miyazaki
- Extremobiosphere Research Program, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 2-15 Natsushima-cho, Yokosuka 237-0061, Japan
| |
Collapse
|
83
|
Yang Y, Liu L, Li J, Du G, Chen J. Biochemical characterization and high-level production of oxidized polyvinyl alcohol hydrolase from Sphingopyxis sp. 113P3 expressed in methylotrophic Pichia pastoris. Bioprocess Biosyst Eng 2013; 37:777-82. [DOI: 10.1007/s00449-013-1047-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2013] [Accepted: 09/02/2013] [Indexed: 12/01/2022]
|
84
|
Lu Y, Kong QM, Jing R, Hu X, Zhu PX. Solid state oxidation of polyvinyl alcohol by hydrogen peroxide-Cu (II). Polym Degrad Stab 2013. [DOI: 10.1016/j.polymdegradstab.2013.03.022] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
85
|
Veteikytė A, Aštrauskaitė M, Gruškienė R, Tekorienė R, Matijošytė I. Secondary alcohol oxidase activity identified in genus of Pseudomonas isolated from the oil polluted soil. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2013. [DOI: 10.1016/j.bcab.2012.11.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
86
|
An overview on alcohol oxidases and their potential applications. Appl Microbiol Biotechnol 2013; 97:4259-75. [DOI: 10.1007/s00253-013-4842-9] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2012] [Revised: 03/06/2013] [Accepted: 03/07/2013] [Indexed: 10/27/2022]
|
87
|
Current application of controlled degradation processes in polymer modification and functionalization. J Appl Polym Sci 2013. [DOI: 10.1002/app.39006] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
|
88
|
Evaluation of the effect of PVA tape supplemented with 2.26% fluoride on enamel demineralization using microhardness assessment and scanning electron microscopy: In vitro study. Arch Oral Biol 2013; 58:160-6. [DOI: 10.1016/j.archoralbio.2012.06.015] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2012] [Revised: 05/10/2012] [Accepted: 06/21/2012] [Indexed: 11/20/2022]
|
89
|
Kawai F, Kitajima S, Oda K, Higasa T, Charoenpanich J, Hu X, Mamoto R. Polyvinyl alcohol and polyethylene glycol form polymer bodies in the periplasm of Sphingomonads that are able to assimilate them. Arch Microbiol 2012; 195:131-40. [DOI: 10.1007/s00203-012-0859-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2012] [Revised: 10/25/2012] [Accepted: 11/28/2012] [Indexed: 10/27/2022]
|
90
|
Overproduction of a truncated poly (vinyl alcohol) dehydrogenase in recombinant Pichia pastoris by low-temperature induction strategy and related mechanism analysis. Bioprocess Biosyst Eng 2012. [PMID: 23207825 DOI: 10.1007/s00449-012-0863-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Based on the N-terminal sequencing of poly (vinyl alcohol) dehydrogenase (PVADH), a 1,644-bp gene encoding a truncated PVADH (tPVADH) was amplified using the synthetic gene (GenBank accession No. JQ235753) as a template, and was further transformed into Pichia pastoris GS115 with the vector pPIC9K. The maximal tPVADH activity reached 546 U/mL in shake flask. The influence of methanol concentration and induction temperature on tPVADH production was further investigated in 3-L bioreactor. When the methanol concentration and induction temperature were controlled at 15 g/L and 22 °C, respectively, the maximal tPVADH activity reached 8,464 U/mL, which was nearly 10 times that of mature PVADH expressed under the same condition and was the highest level ever reported. The reason responsible for the significant improvement of tPVADH production at low induction temperature was explored in terms of cell viability, extracellular proteases activity, and alcohol oxidase activity.
Collapse
|
91
|
Song YS, Lee HU, Lee JH, Choi HS, Choi US, Kim SW. Biodegradation of Synthetic Plastics. ACTA ACUST UNITED AC 2012. [DOI: 10.7841/ksbbj.2012.27.4.215] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
92
|
Tesei G, Paradossi G, Chiessi E. Poly(vinyl alcohol) Oligomer in Dilute Aqueous Solution: A Comparative Molecular Dynamics Simulation Study. J Phys Chem B 2012; 116:10008-19. [DOI: 10.1021/jp305296p] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Giulio Tesei
- Department
of Chemical Sciences and Technologies, University of Rome, Tor Vergata, Via della Ricerca Scientifica I,
00133 Rome, Italy
| | - Gaio Paradossi
- Department
of Chemical Sciences and Technologies, University of Rome, Tor Vergata, Via della Ricerca Scientifica I,
00133 Rome, Italy
| | - Ester Chiessi
- Department
of Chemical Sciences and Technologies, University of Rome, Tor Vergata, Via della Ricerca Scientifica I,
00133 Rome, Italy
| |
Collapse
|
93
|
Jia D, Li J, Liu L, Zhang D, Yang Y, Du G, Chen J. High-level expression, purification, and enzymatic characterization of truncated poly(vinyl alcohol) dehydrogenase in methylotrophic yeast Pichia pastoris. Appl Microbiol Biotechnol 2012; 97:1113-20. [PMID: 22406863 DOI: 10.1007/s00253-012-3986-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2011] [Revised: 02/11/2012] [Accepted: 02/17/2012] [Indexed: 11/30/2022]
Abstract
A 1,965-bp fragment encoding a poly(vinyl alcohol) dehydrogenase (PVADH) from Sphingopyxis sp. 113P3 was synthesized based on the codon bias of the methylotrophic yeast Pichia pastoris. The fragment was then amplified by polymerase chain reaction and inserted into the site between EcoRI and NotI sites in pPIC9K, which was under the control of the AOX1 promoter and α-mating factor signal sequence from Saccharomyces cerevisiae. The recombinant plasmid, designated as pPIC9K-PVADH, was linearized using SalI and transformed into P. pastoris GS115 by electroporation. The PVADH activity reached 55 U/mL in a shake flask and 902 U/mL in a 3-L bioreactor. Surprisingly, the sodium dodecyl sulfate polyacrylamide gel electrophoresis analysis and N-terminal sequencing indicated that the secreted PVADH was truncated, and it had only 548 amino acid residues (an 81-amino acid sequence from the secreted protein was cleaved). The optimum pH and temperature ranges for the truncated PVADH were 7.0-8.0 and 41-53 °C, respectively. The activation energy of the recombinant truncated PVADH was approximately 10.36 kcal/mol between 29 and 41 °C. Both Ca(2+) and Mg(2+) had stimulating effects on the activity of PVADH. With PVA1799 as the substrate, the truncated PVADH had a Michaelis constant (K (m)) of 1.89 mg/mL and a maximum reaction rate (V (max)) of 34.9 nmol/(min mg protein). To the best of our knowledge, this is the first report on the expression of PVADH in P. pastoris, and the achieved PVADH yield is the highest ever reported.
Collapse
Affiliation(s)
- Dongxu Jia
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi, 214122, China
| | | | | | | | | | | | | |
Collapse
|
94
|
Expression and fermentation optimization of oxidized polyvinyl alcohol hydrolase in E. coli. ACTA ACUST UNITED AC 2012; 39:99-104. [DOI: 10.1007/s10295-011-1004-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2011] [Accepted: 06/08/2011] [Indexed: 10/18/2022]
Abstract
Abstract
Oxidized polyvinyl alcohol (PVA) hydrolase (OPH) is a key enzyme in the degradation of PVA, suggesting that OPH has a great potential for application in textile desizing processes. In this study, the OPH gene from Sphingopyxis sp. 113P3 was modified, by artificial synthesis, for overexpression in Escherichia coli. The OPH gene, lacking the sequence encoding the original signal peptide, was inserted into pET-20b (+) expression vector, which was then used to transform E. coli BL21 (DE3). OPH expression was detected in culture medium in which the transformed E. coli BL21 (DE3) was grown. Nutritional and environmental conditions were investigated for improved production of OPH protein by the recombinant strain. The highest OPH activity measured was 47.54 U/mL and was reached after 84 h under optimal fermentation conditions; this level is 2.64-fold higher that obtained under sub-optimal conditions. The productivity of recombinant OPH reached 565.95 U/L/h. The effect of glycine on the secretion of recombinant OPH was examined by adding glycine to the culture medium to a final concentration of 200 mM. This concentration of glycine reduced the fermentation time by 24 h and increased the productivity of recombinant OPH to 733.17 U/L/h. Our results suggest that the recombinant strain reported here has great potential for use in industrial applications.
Collapse
|
95
|
Guo M, Trzcinski AP, Stuckey DC, Murphy RJ. Anaerobic digestion of starch-polyvinyl alcohol biopolymer packaging: biodegradability and environmental impact assessment. BIORESOURCE TECHNOLOGY 2011; 102:11137-11146. [PMID: 22001054 DOI: 10.1016/j.biortech.2011.09.061] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2011] [Revised: 09/11/2011] [Accepted: 09/15/2011] [Indexed: 05/31/2023]
Abstract
The digestibility of a starch-polyvinyl alcohol (PVOH) biopolymer insulated cardboard coolbox was investigated under a defined anaerobic digestion (AD) system with key parameters characterized. Laboratory results were combined with industrial operational data to develop a site-specific life cycle assessment (LCA) model. Inoculated with active bacterial trophic groups, the anaerobic biodegradability of three starch-PVOH biopolymers achieved 58-62%. The LCA modeling showed that the environmental burdens of the starch-PVOH biopolymer packaging under AD conditions on acidification, eutrophication, global warming and photochemical oxidation potential were dominated by atmospheric emissions released from substrate degradation and fuel combustion, whereas energy consumption and infrastructure requirements were the causes of abiotic depletion, ozone depletion and toxic impacts. Nevertheless, for this bio-packaging, AD of the starch-PVOH biopolymer combined with recycling of the cardboard emerged as the environmentally superior option and optimization of the energy utilization system could bring further environmental benefits to the AD process.
Collapse
Affiliation(s)
- M Guo
- Department of Biology, Imperial College of Science and Technology and Medicine, London SW7 2AZ, UK.
| | | | | | | |
Collapse
|
96
|
Fusconi M, Petrozza V, Taddei AR, Vinciguerra V, De Virgilio A, Chiarini F, Cirenza M, Gallinelli C, Conte M, de Vincentiis M. Is biofilm the cause of chronic otitis externa? Laryngoscope 2011; 121:2626-33. [DOI: 10.1002/lary.22348] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
97
|
Li M, Liao X, Zhang D, Du G, Chen J. Yeast extract promotes cell growth and induces production of polyvinyl alcohol-degrading enzymes. Enzyme Res 2011; 2011:179819. [PMID: 21977311 PMCID: PMC3184429 DOI: 10.4061/2011/179819] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2011] [Revised: 07/29/2011] [Accepted: 08/02/2011] [Indexed: 11/20/2022] Open
Abstract
Polyvinyl alcohol-degrading enzymes (PVAases) have a great potential in bio-desizing processes for its low environmental impact and low energy consumption. In this study, the effect of yeast extract on PVAases production was investigated. A strategy of four-point yeast extract addition was developed and applied to maximize cell growth and PVAases production. As a result, the maximum dry cell weight achieved was 1.48 g/L and the corresponding PVAases activity was 2.99 U/mL, which are 46.5% and 176.8% higher than the control, respectively. Applying this strategy in a 7 L fermentor increased PVAases activity to 3.41 U/mL. Three amino acids (glycine, serine, and tyrosine) in yeast extract play a central role in the production of PVAases. These results suggest that the new strategy of four-point yeast extract addition could benefit PVAases production.
Collapse
Affiliation(s)
- Min Li
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China
| | | | | | | | | |
Collapse
|
98
|
|
99
|
Amann M, Minge O. Biodegradability of Poly(vinyl acetate) and Related Polymers. SYNTHETIC BIODEGRADABLE POLYMERS 2011. [DOI: 10.1007/12_2011_153] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
|