Tag Archives: biodegradation

Biocatalitic Transformation of epoxy- and vinylphosphonates

Biocatalitic Transformation of epoxy- and vinylphosphonates GÓRAK M., SERAFIN M., KLIMEK-OCHAB M., ŻYMAŃCZYK-DUDA E.

Please cite as: CHEMIK 2015, 69, 5, 273–280 The subject of research was the selective transformation of the two groups of organophosphorus compounds, epoxy- and vinylphosphonates, to the corresponding derivatives, using whole cells of bacteria or fungi. Hydrolytic activity towards model epoxphosphonate was observed only in the case of Aspergillus niger, whereas Cladosporium herbarum and Fusarium oxysporum were able to degrade stable C-P bond in vinylphosphonates, under defined experimental conditions. Keywords: biotransformation, hydrolysis, epoxyphosphonate, dihydroxyphosphonate, vinylphosponate, biodegradation Read more in pdf pdf-icon...
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Studies of material resistance against natural environmental factors

Studies of material resistance against natural environmental factors
SOBKÓW d., BARTON J., CZAJA K., SUDOŁ M, MAZOŃ B.

Please cite as: CHEMIK 2014, 68, 4, 347–354

This work presents fundamental aspects of material resistance to environmental conditions, including number of atmospheric conditions and biosphere. These areas for many years have been important research topics in the Division of Chemical Technology and Polymer Chemistry of the Faculty of Chemistry, Opole University – the research involves studies on photo-, thermo- and biodegradation of materials, mainly polymer materials. The complexity of such studies allows to determine lifetime of products manufactured from studied materials under the conditions corresponding to their potential area of application. The growing interest in obtaining and manufacturing new types of materials is a result of their application for manufacturing of various, useful products exploited under various conditions. These conditions, depending on their type, intensity and exposure time, cause diverse changes in the material, and that...

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Azo dyes ? biological activity and synthetic strategy

Azo dyes ? biological activity and synthetic strategy WĘGLARZ-TOMCZAK E., GÓRECKI Ł. Please cite as: CHEMIK 2012, 66, 12, xx Azo dyes are the largest and the most popular group of dyes demonstrating the full palette of colors. These compounds, containing ?N=N? group as a characteristic chromophore, are mainly obtained in diazotization and coupling reaction. Nowadays, they constitute around 60% of all dyes used in food and textile industry. Besides coloring properties, their biological activities are known, being a risk factor for humans and environment, but having certain pharmacological potential. This review is focused on presentation of chosen biological properties of title compounds, in the context of their medicinal applications, environmental hazard and modern synthetic strategies. Keywords: azo dyes, diazotization/coupling reaction, azoreduction, biodegradation, cancerogenicity, mutagenicity Read more: pdf-icon...
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Microbial transformation of xenobiotics

Microbial transformation of xenobiotics

GREŃ I. Please cite as: CHEMIK 2012, 66, 8, 835-842 As the result of human activity large amount of chemically different xenobiotics enter the environment every day. Physical and chemical properties of these compounds contribute to their accumulation in the environment, and their toxicity is dangerous for all living organisms. That?s why microorganisms have been engaged for fight with xenobiotics through performing their biodegradation, mineralization or transformation. In this way microorganisms contribute to decrease the amount of xenobiotics in environment. Keywords: xenobiotics, biodegradation, bioavailability, transformation, cometabolism Read more: pdf-icon...
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Poly (vinyl alcohol) ? biodegradable vinyl material

Poly(vinyl alcohol) ? biodegradable vinyl material Jolanta PAJĄK, Michał ZIEMSKI, Bożena NOWAK ? Faculty of Biology and Environmental Protection, University of Silesia, Katowice Please cited as: CHEMIK 2010, 64, 7-8, 523-530 In this article biodegradable polymer poly (vinyl alcohol) (PVA) was characterized as well as its application in the various fields of industry, pharmacy and medicine. The mechanisms of the biodegradation of poly (vinyl alcohol) and the effectiveness of this process in different environmental conditions were presented. Keywords: poli(vinyl alcohol), application, biodegradation Read more: pdf-icon...
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Biodegradable shape memory polymers for medical purposes

Biodegradable shape memory polymers for medical purposes Anna JAROS ? Faculty of Pharmacy with the Section of Laboratory Medicine, Chair and Department of Biopharmacy, Medical University of Silesia, Katowice; Anna SMOLA ? The Centre of Polymer and Carbon Materials, Polish Academy of Sciences, Zabrze; Janusz KASPERCZYK ? Faculty of Pharmacy with the Section of Laboratory Medicine, Chair and Department of Biopharmacy, Medical University of Silesia, Katowice, The Centre of Polymer and Carbon Materials, Polish Academy of Sciences, Zabrze; Piotr DOBRZYŃSKI ? The Centre of Polymer and Carbon Materials, Polish Academy of Sciences, Zabrze, Faculty of Mathematics and Life Sciences, The Jan Długosz Academy, Częstochowa Please cited as: CHEMIK 2010, 64, 2, 87-96 The article is a brief review of biodegradable shape memory polymers (SMP). It has been described the mechanism of shape memory effect in such materials. The problem of their biocompatibility has been presented. They are enumerated examples of polymers SMP, that are promising material for use in the formation of implants and devices...
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