Journal
FEMS MICROBIOLOGY ECOLOGY
Volume 31, Issue 3, Pages 249-253Publisher
ELSEVIER SCIENCE BV
DOI: 10.1111/j.1574-6941.2000.tb00690.x
Keywords
biodegradation; cometabolism; DDT; meta-fission; biphenyl
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Evidence is presented demonstrating the ability of Ralstonia eutropha A5 to degrade 1,1-dichloro-2,2-bis(4-chlorophenyl)ethane (DDD) aerobically. Strain A5 was able to effect significant transformation of [C-14]DDD: the hexane extractable radioactivity decreased to approximately 50% of the controls while more than 25% of the total radioactivity became associated with the acidified culture supernatant. There was also an increase in the amount of radioactivity associated with the cell pellet when compared to the biotic control. A meta-fission pathway for the degradation of DDD is proposed based on the recovery of seven chlorinated metabolites identified by gas chromatography-mass spectrometry analysis. (C) 2000 Published by Elsevier Science B.V. All rights reserved.
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