Thiosulfate, polythionates, and rhodanese activity in Lakes Erie and Ontario sediments
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چکیده
منابع مشابه
Polybrominated diphenyl ethers in the sediments of the Great Lakes. 3. Lakes Ontario and Erie.
Sediment cores were taken in 2002 in Lakes Ontario and Erie at four locations. A total of 48 sediment samples were characterized, dated using 210Pb, and analyzed for 10 congeners of polybrominated diphenyl ethers (PBDEs) including BDE209 as well as 39 congeners of polychlorinated biphenyls (PCBs). The surficial concentrations of nine tri- through hepta-BDE congeners (sigma9PBDE) are 4.85 and 6....
متن کاملSedimentary geolipid records of historical changes in the watersheds and productivities of Lakes Ontario and Erie
The organic matter contents of sediments deposited in Lakes Erie and Ontario contribute to the record of changes in the lake watersheds and aquatic ecosystems which have resulted from European settlement and cultural eutrophication of these systems over the past two centuries. Compositions of n-alkanes and n-alkanoic acids extracted from lake sediments track the clearing of the original natural...
متن کاملRhodanese-catalyzed reduction of thiosulfate by reduced lipoic acid.
by a double displacement mechanism (1, 2). Thiosulfate and organic thiosulfonates will act as sulfur donors for the enzyme (3). Cyanide ion, SOS=, and the organic sulfinates will accept sulfur from the enzyme-sulfur compound (1, 4, 5). In this study, crystalline beef liver rhodanese has been found to catalyze the reduction of SSOp to HSand SOf. Several powerful reducing agents, such as NaBH4 an...
متن کاملSurvey of the photosynthetic bacteria for rhodanese (thiosulfate: cyanide sulfur transferase) activity.
Rhodanese activity was demonstrated in extracts from all three taxonomic families of photosynthetic bacteria, and this activity appeared to be uncorrelated with thiosulfate metabolism.
متن کاملMechanism of Rhodanese Catalysis of Thiosulfate-lipoate Oxidation-reduction.
Crystalline beef liver rhodanese (thiosulfate : cyanidesulfurtransferase, EC 2.8.1.1) catalyzes sulfur transfer from SSOato CNby a double displacement mechanism (3, 4). The biological role of this reaction is not clear, but its possible involvement in CNdetoxication has been repeatedly stressed. The present study of the specificity of the crystalline beef liver enzyme and of the occurrence of t...
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ژورنال
عنوان ژورنال: Limnology and Oceanography
سال: 1979
ISSN: 0024-3590
DOI: 10.4319/lo.1979.24.2.0383