Document Detail


Anaerobic transformation of 2,4,6-TNT by bovine ruminal microbes.
MedLine Citation:
PMID:  14751225     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Degradation of TNT by bovine rumen fluid, a novel source of anaerobic microbes, was investigated. Whole rumen fluid contents were spiked with TNT and incubated for a 24h time period. Supernatant samples taken at 0, 1, 2, 4, and 24h were analyzed by reverse-phase HPLC with diode array detection. Within 1h, TNT was not detectable and reduction products of TNT including 2-hydroxyl-amino-4,6-dinitrotoluene, 4-hydroxylamino-2,6-dinitrotoluene, and 4-amino-2,6-dinitrotoluene were present with smaller amounts of diamino-nitrotoluenes. Within 2h, only the diamino and dihydroxyamino-nitrotoluene products remained. After 4h, 2,4-diamino-6-nitrotoluene and 2,4-dihydroxyamino-6-nitrotoluene were the only known molecular species left. At 24h known UV absorbing metabolites were no longer detected, suggesting further transformation such as complete reduction to triaminotoluene or destruction of the aromatic ring of TNT may have occurred. TNT was not transformed at 24h in autoclaved and buffered controls. This study presents the first direct evidence of biodegradation of TNT by ruminal microbes.
Authors:
Thomas J Fleischmann; Karen C Walker; Jim C Spain; Joseph B Hughes; A Morrie Craig
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Biochemical and biophysical research communications     Volume:  314     ISSN:  0006-291X     ISO Abbreviation:  Biochem. Biophys. Res. Commun.     Publication Date:  2004 Feb 
Date Detail:
Created Date:  2004-01-30     Completed Date:  2004-03-23     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0372516     Medline TA:  Biochem Biophys Res Commun     Country:  United States    
Other Details:
Languages:  eng     Pagination:  957-63     Citation Subset:  IM    
Affiliation:
College of Veterinary Medicine, Oregon State University, Corvallis, OR 97331, USA.
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MeSH Terms
Descriptor/Qualifier:
Anaerobiosis*
Animals
Biodegradation, Environmental
Cattle
Chromatography, High Pressure Liquid
Rumen / microbiology*
Spectrophotometry, Ultraviolet
Trinitrotoluene / metabolism*
Chemical
Reg. No./Substance:
118-96-7/Trinitrotoluene

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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