Computer Science
Scientific paper
Jul 1972
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1972gecoa..36..709n&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 36, Issue 7, pp.709-727
Computer Science
3
Scientific paper
Four stations in the Dead Sea (representing two shallow oxidizing and two deep reducing environments) were analyzed. The total organic carbon content of the sediment ranged from 0.23 to 0.40 per cent. Hydrocarbons, fatty acids, amino acids, humic acids and chlorins were separated and characterized. Of special significance were the following findings: 1. (i) the presence of the isoprenoid hydrocarbons (phytane and pristane) as well as phytanic acid, phytol and dihydrophytol, all thought to be derived from a phosphatidyl glycerophosphate lipid present in halophilic bacteria which populate the water column 2. (ii) a high abundance of unsaturated C-18 fatty acids 3. (iii) presence of apparently unaltered chlorophyll a in the chlorins isolated, but absence of chlorophyll b 4. (iv) low concentration of humic and fulvic acids in the oxidizing shallow sediments as compared to their concentration in the deeper reducing sediments. It is apparent that the hypersaline environment is conducive for preservation of the organic matter under reducing conditions but not under oxidizing conditions. In the latter case, the organic matter of the sediment is rapidly converted into an insoluble, non-extractable complex.
Baedecker Mary Jo
Kaplan Isaac R.
Nissenbaum Arie
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