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Record Details

Record 75 of 3260
Natural abundances of carbon isotopes in acetate from a coastal marine sediment
Author and Affiliation:
Blair, N. E.(North Carolina State University, Department of Marine, Earth, and Atmospheric Sciences, Raleigh 27695, United States)
Martens, C. S.
Des Marais, D. J.
Abstract: Measurements of the natural abundances of carbon isotopes were made in acetate samples isolated from the anoxic marine sediment of Cape Lookout Bight, North Carolina. The typical value of the total acetate carbon isotope ratio (delta 13C) was -16.1 +/- 0.2 per mil. The methyl and carboxyl groups were determined to be -26.4 +/- 0.3 and -6.0 +/- 0.3 per mil, respectively, for one sample. The isotopic composition of the acetate is thought to have resulted from isotopic discriminations that occurred during the cycling of that molecule. Measurements of this type, which have not been made previously in the natural environment, may provide information about the dominant microbial pathways in anoxic sediments as well as the processes that influence the carbon isotopic composition of biogenic methane from many sources.
Publication Date: Apr 03, 1987
Document ID:
20040089618
(Acquired Sep 07, 2004)
Subject Category: EXOBIOLOGY
Document Type: Journal Article
Publication Information: Science (ISSN 0036-8075); Volume 236; 66-8
Publisher Information: United States
Contract/Grant/Task Num: NAGW-593; NAGW-838; OCE82-08666
Financial Sponsor: NASA; Washington DC United States
Description: In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: ABUNDANCE; ACETATES; CARBON; CARBON ISOTOPES; COASTS; MICROBIOLOGY; SEDIMENTS; BACTERIA; CLOSTRIDIUM; ESCHERICHIA; EXOBIOLOGY; MARINE BIOLOGY; METHANE; NORTH CAROLINA
Other Descriptors: ACETATES/ANALYSIS/CHEMISTRY/METABOLISM; CARBON/ANALYSIS/CHEMISTRY/METABOLISM; ENVIRONMENTAL MICROBIOLOGY; GEOLOGIC SEDIMENTS/CHEMISTRY; ACETOBACTER; CARBON ISOTOPES; CLOSTRIDIUM; ESCHERICHIA COLI; MARINE BIOLOGY; METHANE/ANALYSIS/CHEMISTRY/METABOLISM; NORTH CAROLINA; SUPPORT, U.S. GOV'T, NON-P.H.S; NASA CENTER ARC; NASA DISCIPLINE EXOBIOLOGY; NASA DISCIPLINE NUMBER 52-30; NASA PROGRAM EXOBIOLOGY
Availability Source: Other Sources
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