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RECORD NUMBER: 11 OF 30

OLS Field Name OLS Field Data
Main Title Effects of Adaptation on Biodegradation Rates in Sediment/Water Cores from Estuarine and Freshwater Environments.
Author Spain, Jim C. ; Pritchard, P. H. ; Bourquin, A. W. ;
CORP Author Environmental Research Lab., Gulf Breeze, FL.
Year Published 1980
Report Number EPA-600/J-80-007 ;CONTRIB-410;
Stock Number PB81-126609
Additional Subjects Adaptation ; Biodeterioration ; Toxicology ; Nitrophenols ; Estuaries ; Exposure ; Water ; Sediments ; Rivers ; Concentration(Composition) ; Pesticides ; Bacteria ; Reprints ; Salt marshes ; Parathion ; Toxic substances
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NTIS  PB81-126609 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 11p
Abstract Experiments were devised to determine whether exposure to xenobiotics would cause microbial populations to degrade the compounds more rapidly during subsequent exposures. Studies were done with water/sediment systems (eco-cores) taken from a salt marsh and a river. Systems were tested for adaptation to the model compounds methyl parathion and p-nitrophenol. 14CO2 released from radioactive parent compounds was used as a measure of mineralization. River populations pre-exposed to p-nitrophenol at concentrations as low as 60 micrograms/l degraded the nitrophenol much faster than control populations. River populations pre-exposed to methyl parathion also adapted to degrade the pesticides more rapidly, but higher concentrations were required. Salt marsh populations did not adapt to degrade methyl parathion. p-Nitrophenol-degrading bacteria were isolated from river samples, but not from salt marsh samples. Numbers of nitrophenol-degrading bacteria increased 4 to 5 orders of magnitude during adaptation. Results indicate that the ability of populations to adapt depends on the presence of specific microorganisms. Biodegradation rates in laboratory systems can be affected by concentration and prior exposure; therefore, adaptation must be considered when such systems are used to predict the fate of xenobiotics in the environment.
Supplementary Notes Pub. in Applied and Environmental Microbiology, v40 n4 p726-734 Oct 80.
NTIS Title Notes Journal article.
Title Annotations Reprint: Effects of Adaptation on Biodegradation Rates in Sediment/Water Cores from Estuarine and Freshwater Environments.
PUB Date Free Form Oct 80
Category Codes 6T; 6F; 57Y; 68D
NTIS Prices PC A02/MF A01
Primary Description 600/04
Document Type NT
Cataloging Source NTIS/MT
Control Number 323789799
Origin NTIS
Type CAT