NAVRÁTILOVÁ, Jitka, Ludmila KOTOUČKOVÁ, Miroslav NĚMEC and Jiří NEČA. Rhodococcus opacus J3 - the bacterium degrading nitroaromatic compounds. In 12th internationl biodeterioration and biodegradation symposium (bisosorption and biodremediaton III ). Praha: JMP Tisk s.r.o., 2002, p. 56. Programme, Abstract book. ISBN 80-86313-08-5.
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Basic information
Original name Rhodococcus opacus J3 - the bacterium degrading nitroaromatic compounds
Authors NAVRÁTILOVÁ, Jitka (203 Czech Republic, guarantor), Ludmila KOTOUČKOVÁ (203 Czech Republic), Miroslav NĚMEC (203 Czech Republic) and Jiří NEČA (203 Czech Republic).
Edition Praha, 12th internationl biodeterioration and biodegradation symposium (bisosorption and biodremediaton III ), p. 56-56, Programme, Abstract book, 2002.
Publisher JMP Tisk s.r.o.
Other information
Original language English
Type of outcome Proceedings paper
Field of Study 10600 1.6 Biological sciences
Country of publisher Czech Republic
Confidentiality degree is not subject to a state or trade secret
RIV identification code RIV/00216224:14310/02:00006348
Organization unit Faculty of Science
ISBN 80-86313-08-5
Keywords in English Rhodococcus opacus; nitroaromatic compounds; degradation
Tags degradation, nitroaromatic compounds, Rhodococcus opacus
Changed by Changed by: Mgr. Jitka Makovcová, Ph.D., učo 20961. Changed: 11/9/2002 13:35.
Abstract
Nitroaromatic compounds are released into the environment trough their wide use as dyes, plasticizers, pesticides, explozives and solvents. The presence of the nitro group causes such compounds to be more resistant to biodegradation than the unsubstituted analogs.The rhodococci have attracted and increased interest in the biochemical and genetical characterization of their metabolic capabilities, based on their ability to transform or degrade diverse classes of mainly hydrophobic substances. Rhodococcus opacus J3 is capable to degrade nitroaromatic compounds.This strain was isolated from soil by selectively enrichment with 4-nitrocatechol in mineral medium. Rhodococcus opacus J3 is gram-positive, strict aerobic bacterium who exhibit a typical rod-coccus cycle.This bacterium was identified as Rhodococcus opacus on the base of morfology, physiology, biochemical characterization, whole cell fatty acid composition and determination of partial sequence of genes for 16S rRNA. Biodegradation of 9 nitroaromatics was tested.We determined degradation of 5 substrates:4-nitrocatechol, 4-nitroguaiacol, 5-nitroguaiacol, 3-nitrophenol and 2,4-dinitrobenzoic acid. We tested degradation in concentration range from 0,025 mM to 0,1 mM. We did not determine degradation of 2-nitrophenol, 4-nitrophenol, 4,5-dimethoxy-2-nitrobenzoic acid and 2,3-diphluoro-6- nitrophenol. Concentration of nitroaromatics and nitrites released were measured spectrophotometricaly. Degradation of substrates was confirmed by HPLC. The process of degradation was monitored on automatic microbiological system Bioscreen C.
Links
GA204/00/P095, research and development projectName: Mikrobiální transformace organických polutantů ve směsích
Investor: Czech Science Foundation, Microbial transformation of organic pollutants in mixtures
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