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- W1560433046 abstract "A polychlorobiphenyl (PCB)-dechlorinating inoculum eluted from upper Hudson River sediments was treated with either heat or ethanol or both. The treated cultures retained the ability to dechlorinate PCBs (Aroclor 1242) under strictly anaerobic conditions. The dechlorination activity was maintained in serial cultures inoculated with transfers of 1% inoculum when the transferred inoculum was treated each time in the same manner. No methane production was detected in any treated culture, although dechlorination of PCBs in the untreated cultures was always accompanied by methane production. All treated cultures preferentially removed meta chlorines, yielding a dechlorination pattern characterized by accumulation of certain ortho- and para-subsituted congeners such as 2-4-chlorobiphenyl (2-4-CB), 2,4-2-CB, and 2,4-4-CB. In contrast, the untreated cultures showed more extensive dechlorination activities, which almost completely removed both meta and para chlorines from Aroclor 1242. These results suggest that microorganisms responsible for the dechlorination of PCBs in the upper Hudson River sediments can be grouped into two populations according to their responses to the heat and ethanol treatments. Microorganisms surviving the heat and ethanol treatments preferentially remove meta chlorines, while microorganisms lost from the enrichment mainly contribute to the para dechlorination activity. These results indicate that anaerobic sporeformers are at least one of the physiological groups responsible for the reductive dechlorination of PCBs. The selection of a dechlorinating population by such treatments may be an important step in isolation of PCB-dechlorinating microorganisms." @default.
- W1560433046 created "2016-06-24" @default.
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- W1560433046 date "1992-04-01" @default.
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- W1560433046 title "Anaerobic dechlorination of polychlorobiphenyls (Aroclor 1242) by pasteurized and ethanol-treated microorganisms from sediments" @default.
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- W1560433046 doi "https://doi.org/10.1128/aem.58.4.1110-1114.1992" @default.
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