Computer Science
Scientific paper
Oct 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978gecoa..42.1523c&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 42, Issue 10, pp.1523-1532
Computer Science
5
Scientific paper
Lipids directly extracted by organic solvents from sediment of a small eutrophic lake (Crose Mere) comprise free hydrocarbons, alcohols, sterols and monocarboxylic acids together with an esterified component yielding additional amounts of alcohols, sterols and monocarboxylic acids on saponification. The carbon-number distributions of the free lipid compound classes indicate a major contribution from allochthonous sources whereas the distributions within compound classes released on saponification are attributable to autochthonous sources. The more advanced state of decomposition of terrestrial biota relative to aquatic biota and the composition of the source organisms are postulated to be factors leading to the differences in distribution of corresponding free and esterified lipid classes. Acid hydrolysis of solvent-extracted sediment liberates additional lipid constituents belonging to the above compound classes. Of these bound lipids, the n -alkanes and branched/cyclic alkanoic acids show a more significant bacterial contribution than do the corresponding components obtained by solvent extraction alone.
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