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OLS Field Name OLS Field Data
Main Title Comparison of Microbial Transformation Rate Coefficients of Xenobiotic Chemicals between Field-Collected and Laboratory Microcosm Microbiota.
Author Lewis, D. L. ; Kellogg, R. B. ; Holm, H. W. ;
CORP Author Environmental Research Lab., Athens, GA. ;Centers for Disease Control, Atlanta, GA.
Year Published 1984
Report Number EPA-600/D-84-049;
Stock Number PB84-149749
Additional Subjects Microorganisms ; Transformation rate ; Toxicology ; Xenobiotics
Library Call Number Additional Info Location Last
NTIS  PB84-149749 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/23/1988
Collation 28p
Two second-order transformation rate coefficients--kb, based on total plate counts, and kA, based on periphyton-colonized surface areas--were used to compare xenobiotic chemical transformation by laboratory-developed (microcosm) and by field-collected microbiota. Similarity of transformer community structure in blended aufwuchs was indicated by kb values, and similarity of transformation rates per unit of periphyton-colonized surface area was indicated by kA values. Xenobiotic chemicals used for the comparisons were methyl marathion (MP), diethyl phthalate (DEP), and 2, 4-dichlorophenoxyacetic acid butoxyethyl ester (2, 4-DBE). Even though rate coefficients of each of the chemicals were similar among microcosm- and field-collected microbial samples, not all of the field collected samples showed MP or DEP transformation. MP transformation was suppressed by aqueous extracts of field-collected, algae-dominated aufwuchs and by low concentrations of DEP. Lack of DEP transformation appeared to have resulted from an absence of DEP-transforming bacteria in field-collected aufwuchs samples.