1
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Pallavi P, Rajhans G, Kumar V, Kumar Sen S, Raut S. Deciphering the role of fungus in degradation of polypropylene from hospital waste. Biotechnol Appl Biochem 2023; 70:1915-1924. [PMID: 37417692 DOI: 10.1002/bab.2492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Accepted: 06/15/2023] [Indexed: 07/08/2023]
Abstract
Health and environmental consequences are unavoidable when it comes to management of hospital waste (HW) disposables. In order to eradicate the HW, this study isolated a novel fungus SPF21 from a hospital dumping yard to degrade Polypropylene (PP). We measured the attributes of PP inoculated with fungus using mass loss, Fourier trans-form infrared (FTIR), contact angle (CA), and scanning electron microscopy (SEM). The weight of PP exposed to SPF21 was reduced by 25% in 90 days. The SEM images reveal that there are pores all over the sample surface; they alsocaused voids during the biodegradation of PP. FTIR analysis indicates that the spectra of treated mask pieces show the absence of peak at 1746 cm-1 and the appearance of a new peak at 1643 cm-1 . A period of 90-day exposure to the fungal isolate SPF21 reduced the CA of PP by 44.8% when compared to the nonexposed PP samples, suggesting that the surface of PP turned more hydrophilic after exposure. Moreover, our study on PP degradation by the fungus Ascotricha sinuosa SPF21 appears to be promising from the perspective of environmental, health, and economic hazards. Our results indicate that biodegradation greatly facilitates fungus deposition and changes PP film morphology and hydrophilicity.
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Affiliation(s)
- Preeti Pallavi
- Center for Biotechnology, School of Pharmaceutical Sciences, Siksha 'O' Anusandhan (Deemed to be University), Bhubaneswar, Odisha, India
| | - Geetanjali Rajhans
- Center for Biotechnology, School of Pharmaceutical Sciences, Siksha 'O' Anusandhan (Deemed to be University), Bhubaneswar, Odisha, India
| | - Vikas Kumar
- Center for Biotechnology, School of Pharmaceutical Sciences, Siksha 'O' Anusandhan (Deemed to be University), Bhubaneswar, Odisha, India
| | - Sudip Kumar Sen
- Biostadt India Limited, Waluj, Aurangabad, Maharashtra, India
| | - Sangeeta Raut
- Center for Biotechnology, School of Pharmaceutical Sciences, Siksha 'O' Anusandhan (Deemed to be University), Bhubaneswar, Odisha, India
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2
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Microplastic burden in Africa: A review of occurrence, impacts, and sustainability potential of bioplastics. CHEMICAL ENGINEERING JOURNAL ADVANCES 2022. [DOI: 10.1016/j.ceja.2022.100402] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
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3
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AL-MOALEMI HAFEDHAHMED, IZWAN ABD RAZAK SAIFUL, BOHARI SITIPAULIENAMOHD. ELECTROSPUN SODIUM ALGINATE/POLY(ETHYLENE OXIDE) NANOFIBERS FOR WOUND HEALING APPLICATIONS: CHALLENGES AND FUTURE DIRECTIONS. CELLULOSE CHEMISTRY AND TECHNOLOGY 2022; 56:251-270. [DOI: 10.35812/cellulosechemtechnol.2022.56.23] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
Abstract
Alginate is an interesting natural biopolymer to be considered for biomedical applications due to its advantages and good biological properties. These biological properties make electrospun alginate nanofibers suitable for various uses in the biomedical field, such as wound healing dressings, drug delivery systems, or both. Unfortunately, the fabrication of alginate nanofibers by electrospinning is very challenging because of the high viscosity of the solution, high surface tension and rigidity in water due to hydrogen bonding, and also their diaxial linkages. This review presents an overview of the factors affecting the electrospinning process of sodium alginate/poly(ethylene oxide) (SA/PEO), the application of SA/PEO in drug delivery systems for wound healing applications, and the degradation and swelling properties of SA/PEO. The challenges and future directions of SA/PEO in the medical field are also discussed.
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4
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Toxic Chemicals and Persistent Organic Pollutants Associated with Micro-and Nanoplastics Pollution. CHEMICAL ENGINEERING JOURNAL ADVANCES 2022. [DOI: 10.1016/j.ceja.2022.100310] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
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5
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Liu L, Xu M, Ye Y, Zhang B. On the degradation of (micro)plastics: Degradation methods, influencing factors, environmental impacts. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 806:151312. [PMID: 34743885 DOI: 10.1016/j.scitotenv.2021.151312] [Citation(s) in RCA: 70] [Impact Index Per Article: 35.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 10/25/2021] [Accepted: 10/25/2021] [Indexed: 06/13/2023]
Abstract
Plastics and microplastics are difficult to degrade in the natural environment due to their hydrophobicity, the presence of stable covalent bonds and functional groups that are not susceptible to attack. In nature, microplastics are more likely to attract other substances due to their large specific surface area, which further prevents degradation from occurring. Some of these substances are toxic and harmful, and can be spread to various organisms through the food chain along with the microplastics to cause harm to them. Degradation is an effective way to eliminate plastic pollution, and a comprehensive understanding of the methods and mechanisms of plastic degradation is necessary, because it is the result of synergistic effects of several degradation methods, both in nature and in consideration of future engineering applications. The authors firstly summarize the degradation methods of (micro)plastics; secondly, review the influence of intrinsic properties and environmental factors during the degradation process; finally, discuss the environmental impact of the degradation products of (micro)plastics. It is evident that the degradation of (micro)plastics still has many challenges to overcome, and there are no mature and effective methods that can be applied in engineering practice or widely used in nature. Therefore, there is an urgent need for research on the degradation of (micro)plastics.
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Affiliation(s)
- Lingchen Liu
- School of Architecture and Civil Engineering of Xihua University, Chengdu 610039, PR China
| | - Mingjie Xu
- School of Architecture and Civil Engineering of Xihua University, Chengdu 610039, PR China
| | - Yuheng Ye
- School of Architecture and Civil Engineering of Xihua University, Chengdu 610039, PR China
| | - Bin Zhang
- School of Architecture and Civil Engineering of Xihua University, Chengdu 610039, PR China; School of Food and Biotechnology of Xihua University, Chengdu 610039, PR China.
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6
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Kraskouski A, Hileuskaya K, Kulikouskaya V, Kabanava V, Agabekov V, Pinchuk S, Vasilevich I, Volotovski I, Kuznetsova T, Lapitskaya V. Polyvinyl alcohol and pectin blended films: Preparation, characterization, and mesenchymal stem cells attachment. J Biomed Mater Res A 2021; 109:1379-1392. [PMID: 33252172 DOI: 10.1002/jbm.a.37130] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 11/17/2020] [Accepted: 11/28/2020] [Indexed: 12/19/2022]
Abstract
The design of novel wound dressings for chronic wound treatment is still of great importance. One of the promising approaches is application of mesenchymal stem cells (MSCs), immobilized on a flexible polymer film, for healing. In this study, blended films based on polyvinyl alcohol (PVA) and pectin with different component ratio have been prepared by solution casting method and evaluated. Physicochemical properties of the formed PVA/pectin films, including their morphology, wettability, swelling, stability, mechanical characteristics, have been studied. We demonstrated that the surface of PVA/pectin films could be modified by ultraviolet or dielectric barrier discharge plasma exposure. After both ultraviolet and plasma treatment, the hydrophilicity of PVA/pectin films increased. It has been shown that additional crosslinking of PVA/pectin films with glutaraldehyde resulted in reinforcement of their structure. MSCs were cultured on neat and modified PVA/pectin samples to evaluate the effects of film characteristics and composition on cell behavior. It has been determined that MSCs effectively adhered to glutaraldehyde-crosslinked PVA/pectin films and formed on them the monolayer culture of fibroblast-like cells. The additional modification of PVA/pectin films with collagen resulted in enhancement of MSCs adhesion. Our results show that the obtained PVA/pectin films with adhered MSCs can be suggested for potential application as a part of novel complex wound dressings.
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Affiliation(s)
- Aliaksandr Kraskouski
- Institute of Chemistry of New Materials, National Academy of Sciences of Belarus, Minsk, Belarus
| | - Kseniya Hileuskaya
- Institute of Chemistry of New Materials, National Academy of Sciences of Belarus, Minsk, Belarus
| | - Viktoryia Kulikouskaya
- Institute of Chemistry of New Materials, National Academy of Sciences of Belarus, Minsk, Belarus
| | - Volha Kabanava
- Institute of Chemistry of New Materials, National Academy of Sciences of Belarus, Minsk, Belarus
| | - Vladimir Agabekov
- Institute of Chemistry of New Materials, National Academy of Sciences of Belarus, Minsk, Belarus
| | - Sergei Pinchuk
- Institute of Biophysics and Cell Engineering, National Academy of Sciences of Belarus, Minsk, Belarus
| | - Irina Vasilevich
- Institute of Biophysics and Cell Engineering, National Academy of Sciences of Belarus, Minsk, Belarus
| | - Igor Volotovski
- Institute of Biophysics and Cell Engineering, National Academy of Sciences of Belarus, Minsk, Belarus
| | - Tatyana Kuznetsova
- A.V. Luikov Institute of Heat and Mass Transfer, National Academy of Sciences of Belarus, Minsk, Belarus
| | - Vasilina Lapitskaya
- A.V. Luikov Institute of Heat and Mass Transfer, National Academy of Sciences of Belarus, Minsk, Belarus
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7
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Multivariate exploratory data analysis by PCA of the combined effect of film-forming composition, drying conditions, and UV-C irradiation on the functional properties of films based on chitosan and pectin. Lebensm Wiss Technol 2021. [DOI: 10.1016/j.lwt.2020.110432] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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8
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Microplastics and Nanoplastics in the Freshwater and Terrestrial Environment: A Review. WATER 2020. [DOI: 10.3390/w12092633] [Citation(s) in RCA: 68] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
This review is a critical analysis of current freshwater and terrestrial research with an emphasis on transport, behaviour, fate and subsequent ecological impacts that plastic pollution poses. The current methods of extraction and evaluation of organic-rich samples are also explored for both micro- and nanoplastics. Furthermore, micro- and nanoplastics are discussed with reference to their environmental and health implications for biota. Regulations imposed on the manufacture and distribution of plastics globally are also noted. Within the review, the current literature has been presented and knowledge gaps identified. These include the characterization and quantification of micro- and nanoplastics entering and forming within the freshwater and terrestrial environment, the fate and behaviour of micro- and nanoplastics under varying conditions and the impacts of micro- and nanoplastics on freshwater and terrestrial ecosystems.
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9
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Mendes JF, Norcino LB, Manrich A, Pinheiro ACM, Oliveira JE, Mattoso LHC. Development, physical‐chemical properties, and photodegradation of pectin film reinforced with malt bagasse fibers by continuous
casting. J Appl Polym Sci 2020. [DOI: 10.1002/app.49178] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
| | - Laís Bruno Norcino
- Graduate Program in Biomaterials EngineeringFederal University of Lavras Lavras Minas Gerais Brazil
| | - Anny Manrich
- National Laboratory of Nanotechnology for Agriculture (LNNA)Embrapa Instrumentation São Carlos São Paulo Brazil
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10
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Huang T, Zhao H, Fang Y, Lu J, Yang W, Qiao Z, Lou Q, Xu D, Zhang J. Comparison of gelling properties and flow behaviors of microbial transglutaminase (
MTGase
) and pectin modified fish gelatin. J Texture Stud 2019; 50:400-409. [DOI: 10.1111/jtxs.12405] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Revised: 04/07/2019] [Accepted: 04/26/2019] [Indexed: 11/28/2022]
Affiliation(s)
- Tao Huang
- College of Food and Pharmaceutical Sciences, Ningbo University Ningbo Zhejiang China
| | - Huizhu Zhao
- College of Food and Pharmaceutical Sciences, Ningbo University Ningbo Zhejiang China
| | - Yaoyan Fang
- College of Food and Pharmaceutical Sciences, Ningbo University Ningbo Zhejiang China
| | - Jinpei Lu
- College of Food and Pharmaceutical Sciences, Ningbo University Ningbo Zhejiang China
| | - Wenge Yang
- College of Food and Pharmaceutical Sciences, Ningbo University Ningbo Zhejiang China
| | - Zhaohui Qiao
- College of Food and Pharmaceutical Sciences, Ningbo University Ningbo Zhejiang China
| | - Qiaoming Lou
- College of Food and Pharmaceutical Sciences, Ningbo University Ningbo Zhejiang China
| | - Dalun Xu
- College of Food and Pharmaceutical Sciences, Ningbo University Ningbo Zhejiang China
| | - Jinjie Zhang
- College of Food and Pharmaceutical Sciences, Ningbo University Ningbo Zhejiang China
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11
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Liu CM, Liang L, Shuai XX, Liang RH, Chen J. Dynamic High-Pressure Microfluidization-Treated Pectin under Different Ethanol Concentrations. Polymers (Basel) 2018; 10:E1410. [PMID: 30961334 PMCID: PMC6401947 DOI: 10.3390/polym10121410] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2018] [Revised: 12/15/2018] [Accepted: 12/16/2018] [Indexed: 02/02/2023] Open
Abstract
We previously reported that dynamic high-pressure microfluidization (DHPM) can degrade pectin in aqueous solution. In this study, we further investigated the effect of DHPM on pectin in water-ethanol systems. In the absence of DHPM treatment, it was found that pectin exhibited increased average particle size and unchanged average molecular weight, but a decline in reducing-sugar-ends content with the increase of ethanol concentrations (0⁻10% v/v). These results indicated that the addition of ethanol induced aggregation of pectin. During DHPM treatment, pectin underwent disaggregation and degradation under all measured ethanol concentrations. Disaggregation was enhanced but degradation was weakened with the increase of ethanol concentration. FT-IR and UV spectra indicated that demethylation but no β-elimination occurred in the water-ethanol system during DHPM. Finally, the mechanism of DHPM-induced disaggregation and degradation of pectin under a water-ethanol system was updated. This work may help us to find a suitable condition for reducing the degradation of pectin during the process of homogenization.
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Affiliation(s)
- Cheng-Mei Liu
- State Key Laboratory of Food Science and Technology, Nanchang University, 235 Nanjing East Road, Nanchang 330047, China.
| | - Lu Liang
- State Key Laboratory of Food Science and Technology, Nanchang University, 235 Nanjing East Road, Nanchang 330047, China.
| | - Xi-Xiang Shuai
- State Key Laboratory of Food Science and Technology, Nanchang University, 235 Nanjing East Road, Nanchang 330047, China.
| | - Rui-Hong Liang
- State Key Laboratory of Food Science and Technology, Nanchang University, 235 Nanjing East Road, Nanchang 330047, China.
| | - Jun Chen
- State Key Laboratory of Food Science and Technology, Nanchang University, 235 Nanjing East Road, Nanchang 330047, China.
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12
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Moraczewski K, Stepczyńska M, Malinowski R, Budner B, Karasiewicz T, Jagodziński B. Selected properties of polycaprolactone containing natural anti-aging compounds. ADVANCES IN POLYMER TECHNOLOGY 2018. [DOI: 10.1002/adv.22134] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
| | | | - Rafał Malinowski
- Institute for Engineering of Polymer Materials and Dyes; Toruń Poland
| | - Bogusław Budner
- Institute of Optoelectronics; Military University of Technology; Warsaw Poland
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13
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Bruni GP, de Oliveira JP, El Halal SLM, Flores WH, Gundel A, de Miranda MZ, Dias ARG, da Rosa Zavareze E. Phosphorylated and Cross-Linked Wheat Starches in the Presence of Polyethylene Oxide and Their Application in Biocomposite Films. STARCH-STARKE 2018. [DOI: 10.1002/star.201700192] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Graziella Pinheiro Bruni
- Departamento de Ciência e Tecnologia Agrindustrial, Universidade Federal de Pelotas; Pelotas 96010-900 RS Brazil
| | - Jean Paulo de Oliveira
- Departamento de Ciência e Tecnologia Agrindustrial, Universidade Federal de Pelotas; Pelotas 96010-900 RS Brazil
| | - Shanise Lisie Mello El Halal
- Departamento de Ciência e Tecnologia Agrindustrial, Universidade Federal de Pelotas; Pelotas 96010-900 RS Brazil
| | | | - Andre Gundel
- Universidade Federal do Pampa; Bagé 96413-172 RS Brazil
| | - Martha Zavariz de Miranda
- Empresa Brasileira de Pesquisa Agropecuária − Centro Nacional de Pesquisa de Trigo; Passo Fundo 99050-970 RS Brazil
| | - Alvaro Renato Guerra Dias
- Departamento de Ciência e Tecnologia Agrindustrial, Universidade Federal de Pelotas; Pelotas 96010-900 RS Brazil
| | - Elessandra da Rosa Zavareze
- Departamento de Ciência e Tecnologia Agrindustrial, Universidade Federal de Pelotas; Pelotas 96010-900 RS Brazil
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14
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Huang T, Tu ZC, Shangguan X, Wang H, Zhang N, Zhang L, Sha X. Gelation kinetics and characterization of enzymatically enhanced fish scale gelatin-pectin coacervate. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2018; 98:1024-1032. [PMID: 28718883 DOI: 10.1002/jsfa.8551] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2016] [Revised: 07/10/2017] [Accepted: 07/11/2017] [Indexed: 06/07/2023]
Abstract
BACKGROUND Protein-polysaccharide complex coacervations have been considered extensively for the development of functional foods. The main problem of the complex coacervates is that they are highly unstable under different conditions and that cross-linking is necessary to stabilize them. In this study, the effects of pectin at different concentrations on the gel and structural properties of fish scale gelatin (FSG)-high methoxyl citrus pectin (HMP) coacervate enhanced by microbial transglutaminase (MTGase) were studied. RESULTS The gelation rates and gel strength of the MTGase-enhanced FSG-HMP coacervate gels decreased with increasing HMP concentration. However, the enhanced coacervate gels exhibited better thermal behavior and mechanical properties compared with the original gels. Also, TG-P8 exhibited the highest melting point (27.15 ± 0.12 °C), gelation point (15.65 ± 0.01 °C) and stress (15.36 ± 0.48 kPa) as HMP was 8 g kg-1 . Particle size distribution, fluorescence emission and UV absorbance spectra indicated that MTGase and HMP could make FSG form large aggregates. Moreover, confocal laser scanning microscopy of treated coacervate gels showed a continuous protein phase at low HMP concentrations. CONCLUSION FSG and HMP could form soluble coacervate, and MTGase could improve the thermal and mechanical properties of coacervate gels. © 2017 Society of Chemical Industry.
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Affiliation(s)
- Tao Huang
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, Jiangxi, China
| | - Zong-Cai Tu
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, Jiangxi, China
- College of Life Science, Jiangxi Normal University, Nanchang, Jiangxi, China
| | - Xinchen Shangguan
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, Jiangxi, China
- Food and Drug Administration of Jiangxi Province, Nanchang, Jiangxi, China
| | - Hui Wang
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, Jiangxi, China
| | - Nanhai Zhang
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, Jiangxi, China
| | - Lu Zhang
- College of Life Science, Jiangxi Normal University, Nanchang, Jiangxi, China
| | - Xiaomei Sha
- College of Life Science, Jiangxi Normal University, Nanchang, Jiangxi, China
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15
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Kowalonek J. Surface and thermal properties of UV-irradiated chitosan/poly(ethylene oxide) blends. J Photochem Photobiol A Chem 2017. [DOI: 10.1016/j.jphotochem.2017.08.035] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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16
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17
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Rodriguez-Navarro C, Ruiz-Agudo E, Burgos-Cara A, Elert K, Hansen EF. Crystallization and Colloidal Stabilization of Ca(OH) 2 in the Presence of Nopal Juice (Opuntia ficus indica): Implications in Architectural Heritage Conservation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:10936-10950. [PMID: 28931282 DOI: 10.1021/acs.langmuir.7b02423] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Hydrated lime (Ca(OH)2) is a vernacular art and building material produced following slaking of CaO in water. If excess water is used, a slurry, called lime putty, forms, which has been the preferred craftsman selection for formulating lime mortars since Roman times. A variety of natural additives were traditionally added to the lime putty to improve its quality. The mucilaginous juice extracted from nopal cladodes has been and still is used as additive incorporated in the slaking water for formulation of lime mortars and plasters, both in ancient Mesoamerica and in the USA Southwest. Little is known on the ultimate effects of this additive on the crystallization and microstructure of hydrated lime. Here, we show that significant changes in habit and size of portlandite crystals occur following slaking in the presence of nopal juice as well as compositionally similar citrus pectin. Both additives contain polysaccharides made up of galacturonic acid and neutral sugar residues. The carboxyl (and hydroxyl) functional groups present in these residues and in their alkaline degradation byproducts, which are deprotonated at the high pH (12.4) produced during lime slaking, strongly interact with newly formed Ca(OH)2 crystals acting in two ways: (a) as nucleation inhibitors, promoting the formation of nanosized crystals, and (b) as habit modifiers, favoring the development of planar habit following their adsorption onto positively charged (0001)Ca(OH)2 faces. Adsorption of polysaccharides on Ca(OH)2 crystals prevents the development of large particles, resulting in a very reactive, nanosized portlandite slurry. It also promotes steric stabilization, which limits aggregation, thus enhancing the colloidal nature of the lime putty. Overall, these effects are very favorable for the preparation of highly plastic lime mortars with enhanced properties.
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Affiliation(s)
- Carlos Rodriguez-Navarro
- Departamento Mineralogia y Petrologia, Universidad de Granada , Fuentenueva s/n, 18002 Granada, Spain
| | - Encarnacion Ruiz-Agudo
- Departamento Mineralogia y Petrologia, Universidad de Granada , Fuentenueva s/n, 18002 Granada, Spain
| | - Alejandro Burgos-Cara
- Departamento Mineralogia y Petrologia, Universidad de Granada , Fuentenueva s/n, 18002 Granada, Spain
| | - Kerstin Elert
- Departamento Mineralogia y Petrologia, Universidad de Granada , Fuentenueva s/n, 18002 Granada, Spain
| | - Eric F Hansen
- The Getty Conservation Institute , 1200 Getty Center Drive, Suite 700, Los Angeles, California 90049-1684, United States
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18
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Ultrasound assisted pectic polysaccharide extraction and its characterization from waste heads of Helianthus annus. Carbohydr Polym 2017; 173:707-713. [DOI: 10.1016/j.carbpol.2017.06.018] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2016] [Revised: 05/08/2017] [Accepted: 06/05/2017] [Indexed: 11/19/2022]
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19
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Kowalonek J. Studies of chitosan/pectin complexes exposed to UV radiation. Int J Biol Macromol 2017; 103:515-524. [PMID: 28527987 DOI: 10.1016/j.ijbiomac.2017.05.081] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2017] [Revised: 04/14/2017] [Accepted: 05/15/2017] [Indexed: 12/30/2022]
Abstract
Chitosan and pectin form complexes owing to electrostatic interactions between positively charged amino groups in chitosan and negatively charged carboxylate groups in pectin, which was confirmed by ATR-FTIR spectroscopy and contact angle measurements. Moreover, the formation of these complexes might be associated with the loss of the biopolymers ordering, which resulted in higher surface roughness and lower thermal stability of the complexes in comparison to those of homopolymers. UV rays, used as a sterilizing agent, caused a moderate increase in the surface polarity of the complexes. Roughness parameters of these samples changed irregularly after irradiation, and their thermal stability was slightly affected by UV rays. The results indicated that the complexes studied appeared to present resistance to UV action higher than homopolymers, which is a desirable property in medical or pharmaceutical applications.
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Affiliation(s)
- Jolanta Kowalonek
- Nicolaus Copernicus University in Toruń, Faculty of Chemistry, 7 Gagarin St., 87-100, Toruń, Poland.
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20
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Vedhanayagam M, Nidhin M, Duraipandy N, Naresh ND, Jaganathan G, Ranganathan M, Kiran MS, Narayan S, Nair BU, Sreeram KJ. Role of nanoparticle size in self-assemble processes of collagen for tissue engineering application. Int J Biol Macromol 2017; 99:655-664. [PMID: 28274865 DOI: 10.1016/j.ijbiomac.2017.02.102] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2016] [Revised: 02/28/2017] [Accepted: 02/28/2017] [Indexed: 11/26/2022]
Abstract
Nanoparticle mediated extracellular matrix may offer new and improved biomaterial to wound healing and tissue engineering applications. However, influence of nanoparticle size in extracellular matrix is still unclear. In this work, we synthesized different size of silver nanoparticles (AgNPs) comprising of 10nm, 35nm and 55nm using nutraceuticals (pectin) as reducing as well as stabilization agents through microwave irradiation method. Synthesized Ag-pectin nanoparticles were assimilated in the self-assemble process of collagen leading to fabricated collagen-Ag-pectin nanoparticle based scaffolds. Physico-chemical properties and biocompatibility of scaffolds were analyzed through FT-IR, SEM, DSC, mechanical strength analyzer, antibacterial activity and MTT assay. Our results suggested that 10nm sized Ag-pectin nanoparticles significantly increased the denaturation temperature (57.83°C) and mechanical strength (0.045MPa) in comparison with native collagen (50.29°C and 0.011MPa). The in vitro biocompatibility assay reveals that, collagen-Ag-pectin nanoparticle based scaffold provided higher antibacterial activity against to Gram positive and Gram negative as well as enhanced cell viability toward keratinocytes. This work opens up a possibility of employing the pectin caged silver nanoparticles to develop collagen-based nanoconstructs for biomedical applications.
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Affiliation(s)
- Mohan Vedhanayagam
- Chemical Laboratory, CSIR-Central Leather Research Institute, Adyar, Chennai 600 020, India
| | - Marimuthu Nidhin
- Department of Chemistry, Amity School of Applied Sciences, Amity University, Gurgaon, India
| | - Natarajan Duraipandy
- Chemical Laboratory, CSIR-Central Leather Research Institute, Adyar, Chennai 600 020, India
| | | | - Ganesh Jaganathan
- Chemical Laboratory, CSIR-Central Leather Research Institute, Adyar, Chennai 600 020, India
| | - Mohan Ranganathan
- Chemical Laboratory, CSIR-Central Leather Research Institute, Adyar, Chennai 600 020, India
| | | | - Shoba Narayan
- Faculty of Allied Health Sciences, Chettinad Academy of Research & Education, Chennai 603 103, India
| | - Balachandran Unni Nair
- Chemical Laboratory, CSIR-Central Leather Research Institute, Adyar, Chennai 600 020, India
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Mercier A, Gravouil K, Aucher W, Brosset-Vincent S, Kadri L, Colas J, Bouchon D, Ferreira T. Fate of Eight Different Polymers under Uncontrolled Composting Conditions: Relationships Between Deterioration, Biofilm Formation, and the Material Surface Properties. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:1988-1997. [PMID: 28112955 DOI: 10.1021/acs.est.6b03530] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
With the ever-increasing volume of polymer wastes and their associated detrimental impacts on the environment, the plastic life cycle has drawn increasing attention. Here, eight commercial polymers selected from biodegradable to environmentally persistent materials, all formulated under a credit card format, were incubated in an outdoor compost to evaluate their fate over time and to profile the microbial communities colonizing their surfaces. After 450 days in compost, the samples were all colonized by multispecies biofilms, these latest displaying different amounts of adhered microbial biomass and significantly distinct bacterial and fungal community compositions depending on the substrate. Interestingly, colonization experiments on the eight polymers revealed a large core of shared microbial taxa, predominantly composed of microorganisms previously reported from environments contaminated with petroleum hydrocarbons or plastics debris. These observations suggest that biofilms may contribute to the alteration process of all the polymers studied. Actually, four substrates, independently of their assignment to a polymer group, displayed a significant deterioration, which might be attributed to biologically mediated mechanisms. Relevantly, the deterioration appears strongly associated with the formation of a high-cell density biofilm onto the polymer surfaces. The analysis of various surface properties revealed that roughness and hydrophilicity are likely prominent parameters for driving the biological interactions with the polymers.
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Affiliation(s)
- Anne Mercier
- Laboratoire coopératif ThanaplastSP-Carbios, Ecologie et Biologie des Interactions, Centre National de la Recherche Scientifique, UMR 7267, and ‡Equipe Ecologie Evolution Symbiose, Ecologie et Biologie des Interactions, Centre National de la Recherche Scientifique, UMR 7267, Université de Poitiers , 86073 Poitiers, France
| | - Kevin Gravouil
- Laboratoire coopératif ThanaplastSP-Carbios, Ecologie et Biologie des Interactions, Centre National de la Recherche Scientifique, UMR 7267, and ‡Equipe Ecologie Evolution Symbiose, Ecologie et Biologie des Interactions, Centre National de la Recherche Scientifique, UMR 7267, Université de Poitiers , 86073 Poitiers, France
| | - Willy Aucher
- Laboratoire coopératif ThanaplastSP-Carbios, Ecologie et Biologie des Interactions, Centre National de la Recherche Scientifique, UMR 7267, and ‡Equipe Ecologie Evolution Symbiose, Ecologie et Biologie des Interactions, Centre National de la Recherche Scientifique, UMR 7267, Université de Poitiers , 86073 Poitiers, France
| | - Sandra Brosset-Vincent
- Laboratoire coopératif ThanaplastSP-Carbios, Ecologie et Biologie des Interactions, Centre National de la Recherche Scientifique, UMR 7267, and ‡Equipe Ecologie Evolution Symbiose, Ecologie et Biologie des Interactions, Centre National de la Recherche Scientifique, UMR 7267, Université de Poitiers , 86073 Poitiers, France
| | - Linette Kadri
- Laboratoire coopératif ThanaplastSP-Carbios, Ecologie et Biologie des Interactions, Centre National de la Recherche Scientifique, UMR 7267, and ‡Equipe Ecologie Evolution Symbiose, Ecologie et Biologie des Interactions, Centre National de la Recherche Scientifique, UMR 7267, Université de Poitiers , 86073 Poitiers, France
| | - Jenny Colas
- Laboratoire coopératif ThanaplastSP-Carbios, Ecologie et Biologie des Interactions, Centre National de la Recherche Scientifique, UMR 7267, and ‡Equipe Ecologie Evolution Symbiose, Ecologie et Biologie des Interactions, Centre National de la Recherche Scientifique, UMR 7267, Université de Poitiers , 86073 Poitiers, France
| | - Didier Bouchon
- Laboratoire coopératif ThanaplastSP-Carbios, Ecologie et Biologie des Interactions, Centre National de la Recherche Scientifique, UMR 7267, and ‡Equipe Ecologie Evolution Symbiose, Ecologie et Biologie des Interactions, Centre National de la Recherche Scientifique, UMR 7267, Université de Poitiers , 86073 Poitiers, France
| | - Thierry Ferreira
- Laboratoire coopératif ThanaplastSP-Carbios, Ecologie et Biologie des Interactions, Centre National de la Recherche Scientifique, UMR 7267, and ‡Equipe Ecologie Evolution Symbiose, Ecologie et Biologie des Interactions, Centre National de la Recherche Scientifique, UMR 7267, Université de Poitiers , 86073 Poitiers, France
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Lambert S, Wagner M. Environmental performance of bio-based and biodegradable plastics: the road ahead. Chem Soc Rev 2017; 46:6855-6871. [DOI: 10.1039/c7cs00149e] [Citation(s) in RCA: 340] [Impact Index Per Article: 48.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
This review provides a critical discussion as to the future direction of plastic materials, including balancing factors such as biodegradability and longevity, effects of additive compounds, feedstock developments, and environmental considerations.
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Affiliation(s)
- Scott Lambert
- Department Aquatic Ecotoxicology, Goethe University Frankfurt am Main, Max-von-Laue-Str. 13
- Frankfurt
- Germany
| | - Martin Wagner
- Department Aquatic Ecotoxicology, Goethe University Frankfurt am Main, Max-von-Laue-Str. 13
- Frankfurt
- Germany
- Department of Biology
- Norwegian University of Science and Technology (NTNU)
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Microplastics – Occurrence, Fate and Behaviour in the Environment. CHARACTERIZATION AND ANALYSIS OF MICROPLASTICS 2017. [DOI: 10.1016/bs.coac.2016.10.004] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
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Lombardo PC, Poli AL, Schmitt CC. Influência de estabilizantes na degradação foto-oxidativa de filmes de compósitos de SWy-1/poli(óxido de etileno). POLIMEROS 2015. [DOI: 10.1590/0104-1428.1604] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Compósitos de poli(óxido de etileno) (PEO) com argila montmorilonita SWy-1 e estabilizantes (2-hidroxibenzofenona e tinuvin 770) foram preparados pelo método de intercalação em solução. Os filmes obtidos foram expostos a irradiação UV, e os produtos da fotodegradação foram monitorados por FTIR (Fourier Transform Infrared Spectroscopy, ou Espectroscopia no infravermelho por transformada de Fourier) e SEC (Size Exclusion Chromatography, ou cromatografia de exclusão por tamanho). O PEO puro apresentou maior coeficiente de degradação, kd, comparado com as demais amostras. O sistema que apresentou o menor valor para o coeficiente de degradação (kd = 1,9×10–6 mol g–1 h-1) foi o compósito de PEO/5%SWy-1 com 0,25% de tinuvin 770. Nesse caso, a estabilização da matriz de PEO pode ser atribuída à argila juntamente com o tinuvin 770. A argila dispersa e absorve a irradiação UV, e o tinuvin age como estabilizante do tipo HALS (do inglês hindered amine light stabilizer, ou estabilizantes à luz tipo aminas impedidas).
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Rockwell PL, Kiechel MA, Atchison JS, Toth LJ, Schauer CL. Various-sourced pectin and polyethylene oxide electrospun fibers. Carbohydr Polym 2014; 107:110-8. [DOI: 10.1016/j.carbpol.2014.02.026] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2013] [Revised: 01/23/2014] [Accepted: 02/05/2014] [Indexed: 10/25/2022]
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Lambert S, Sinclair C, Boxall A. Occurrence, degradation, and effect of polymer-based materials in the environment. REVIEWS OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2014; 227:1-53. [PMID: 24158578 DOI: 10.1007/978-3-319-01327-5_1] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
There is now a plethora of polymer-based materials (PBMs) on the market, because of the increasing demand for cheaper consumable goods, and light-weight industrial materials. Each PBM constitutes a mixture of their representative polymer/sand their various chemical additives. The major polymer types are polyethylene, polypropylene,and polyvinyl chloride, with natural rubber and biodegradable polymers becoming increasingly more important. The most important additives are those that are biologically active, because to be effective such chemicals often have properties that make them resistant to photo-degradation and biodegradation. During their lifecycle,PBMs can be released into the environment form a variety of sources. The principal introduction routes being general littering, dumping of unwanted waste materials,migration from landfills and emission during refuse collection. Once in the environment,PBMs are primarily broken down by photo-degradation processes, but due to the complex chemical makeup of PBMs, receiving environments are potentially exposed to a mixture of macro-, meso-, and micro-size polymer fragments, leached additives, and subsequent degradation products. In environments where sunlight is absent (i.e., soils and the deep sea) degradation for most PBMs is minimal .The majority of literature to date that has addressed the environmental contamination or disposition of PBMs has focused on the marine environment. This is because the oceans are identified as the major sink for macro PBMs, where they are known to present a hazard to wildlife via entanglement and ingestion. The published literature has established the occurrence of microplastics in marine environment and beach sediments, but is inadequate as regards contamination of soils and freshwater sediments. The uptake of microplastics for a limited range of aquatic organisms has also been established, but there is a lack of information regarding soil organisms, and the long-term effects of microplastic uptake are also less well understood.There is currently a need to establish appropriate degradation test strategies consistent with realistic environmental conditions, because the complexity of environmental systems is lost when only one process (e.g., hydrolysis) is assessed in isolation. Enhanced methodologies are also needed to evaluate the impact of PBMs to soil and freshwater environments.
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Affiliation(s)
- Scott Lambert
- The University of York, Heslington Road, York, YO10 5DD, UK,
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Munarin F, Bozzini S, Visai L, Tanzi MC, Petrini P. Sterilization treatments on polysaccharides: Effects and side effects on pectin. Food Hydrocoll 2013. [DOI: 10.1016/j.foodhyd.2012.09.017] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Lambert S, Sinclair CJ, Bradley EL, Boxall ABA. Effects of environmental conditions on latex degradation in aquatic systems. THE SCIENCE OF THE TOTAL ENVIRONMENT 2013; 447:225-234. [PMID: 23384646 DOI: 10.1016/j.scitotenv.2012.12.067] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2012] [Revised: 12/19/2012] [Accepted: 12/20/2012] [Indexed: 05/27/2023]
Abstract
Following use polymer materials may be released to the natural environment distributed to various environmental compartments and may undergo a variety of mechanical and chemical weathering processes. This study characterised the degradation of a latex polymer of different thicknesses under a range of environmental conditions in outdoor microcosms. Samples were immersed in either demineralised water, artificial freshwater and marine water media and exposed for a period of 200-250 days with exposure starting at different times of the year. Effects of pH, agitation and the exclusion of light on degradation were also studied. At the end of the exposure period, recovery of polymer material ≥ 1.6 μm ranged from a low of 22.04% (± 16.35, for the freshwater treatment at pH5.5) to a high of 97.73% (± 0.38, for the exclusion of light treatment). The disappearance of the bulk material corresponded to an increase in nanoparticles and dissolved organic material in the test media. Modelled degradation kinetics were characterised by multi-phasic degradation patterns and the results indicated degradation rate is affected by light intensity and polymer thickness. Mass balance analysis indicates that losses of volatile materials to the air compartment may also be occurring.
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Affiliation(s)
- Scott Lambert
- Environment Department, University of York, Heslington, York, YO10 5DD, UK.
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Pectins filled with LDH-antimicrobial molecules: Preparation, characterization and physical properties. Carbohydr Polym 2012; 89:132-7. [DOI: 10.1016/j.carbpol.2012.02.061] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2012] [Revised: 02/01/2012] [Accepted: 02/21/2012] [Indexed: 11/21/2022]
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30
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Lombardo PC, Poli AL, Neumann MG, Machado DS, Schmitt CC. Photodegradation of poly(ethyleneoxide)/montmorillonite composite films. J Appl Polym Sci 2012. [DOI: 10.1002/app.37987] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Yang Y, Tang G, Zhao Y, Yuan X, Fan Y. Effect of Cyclic Loading on In Vitro Degradation of Poly(L-lactide-co-glycolide) Scaffolds. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012; 21:53-66. [DOI: 10.1163/156856209x410229] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Yanfang Yang
- a School of Materials Science and Engineering, Tianjin University, Tianjin 300072, P. R. China; Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin 300072, P. R. China
| | - Gongwen Tang
- b School of Materials Science and Engineering, Tianjin University, Tianjin 300072, P. R. China; Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin 300072, P. R. China
| | - Yunhui Zhao
- c School of Materials Science and Engineering, Tianjin University, Tianjin 300072, P. R. China; Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin 300072, P. R. China
| | - Xiaoyan Yuan
- d School of Materials Science and Engineering, Tianjin University, Tianjin 300072, P. R. China; Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin 300072, P. R. China
| | - Yubo Fan
- e School of Biological Sciences and Medical Engineering, Beihang University, Xueyuan Road 37#, Haidian District, Beijing 100083, P. R. China
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Koo GH, Jang J. Depth-gradient and photoinitiator-free photocrosslinking of poly(ethylene oxide). J Appl Polym Sci 2012. [DOI: 10.1002/app.36438] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Kaczmarek H, Da¸browska A, Vuković-Kwiatkowska I. Accelerated weathering of pectin/poly(vinyl alcohol) blends studied by spectroscopic methods. J Appl Polym Sci 2011. [DOI: 10.1002/app.34298] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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