||Bacterial degredation of dibenzo-p-dioxin and chlorinated dibenzo-p-dioxins /
Klecka, Gary Michael. ;
Klecka, G. M. ;
Gibson, D. T.
||Texas Univ. at Austin. Dept. of Microbiology.;Environmental Research Lab., Gulf Breeze, FL.
|| U.S. Environmental Protection Agency, Environmental Research Laboratory,
Organochlorine compounds--Biodegradation. ;
Oxygen heterocyclic compounds ;
Chlorine aromatic compounds ;
Growth regulators ;
Toxic substances ;
||Some EPA libraries have a fiche copy filed under the call number shown.
||74 pages : illustrations ; 29 cm
||This report sought to determine the initial oxidative pathways for dibenzodioxin and dibenzofuran compounds by bacteria in aquatic systems. Bacterial cultures were isolated and oxidized dibenzo-p-dioxin and mono-chlorinated dibenzo-p-dioxins; however, di-chlorinated dibenzo-p-dioxins, were not metabolized by either strain. The metabolite, 1,2-dihydrodibenzo-p-dioxin, was a potent inhibitor of further oxidation. Pseudomonas sp. N.C.I.B. 9816, strain II, when grown on salicylate in the presence of dibenzo-p-dioxin, accumulated cis-1,2-dihydroxy-1,2-dihydrodibenzo-p-dioxin and 2-hydroxydibenzo-p-dioxin in the culture medium. Crude cell extracts prepared from the parental strain grown with naphthalene oxidized cis-1,2-dihydroxy-1,2-dihyrodibenzo-p-dioxin under both aerobic and anerobic conditions to 1,2-dihydroxydibenzo-p-dioxin. Further degradation of this metabolite was not detected. Whole cells of the parent strain of Beijerinckia, grown with succinate and biphenyl, oxidized dibenzo-p-dioxin and several chlorinated dioxins. The rate of oxidation of the chlorinated dibenzo-p-dioxins decreased with an increasing degree of chlorine substitution. A mutant strain (B8/36) of Beijerinckia oxidized dibenzo-p-dioxin to cis-1,2-dihydroxy-1,2-dihydrodibenzo-p-dioxin.
||"March 1981." Includes bibliographical references. Microfiche.
||Gulf Breeze, FL :
|Corporate Au Added Ent
||Texas University (Austin). Department of Microbiology.
|PUB Date Free Form
|Ti Tra Differently
||Bacterial degradation of dibenzo-p-dioxin and chlorinated dibenzo-p-dioxins.
||PC A04/MF A01
|OCLC Time Stamp
|OCLC Rec Leader
||01204nam 2200301Ka 45020