Computer Science
Scientific paper
Sep 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982gecoa..46.1545r&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 46, Issue 9, pp.1545-1553
Computer Science
4
Scientific paper
The detailed investigation of the saturated hydrocarbon fractions of two biodegraded asphalts from the Morondava Basin, Madagascar, and the comparison with a related non-biodegraded asphaltic oil revealed new information on the compositional alteration of reservoired hydrocarbons due to biodegradation. A nuclear-demethylated 17 (H)-hopane was isolated from one of the asphalts and the preferred structure is suggested to be 25-nor-17 (H)-hopane. In addition to a homologous series of 25-nor-17 (H)-hopanes and 25-normoretanes a series of tetracyclic triterpanes was detected. These are thought to be derived from 17 (H)-hopanes by ring C opening. Steranes in the biodegraded asphalts were found to be altered but not completely removed.
Rullkötter Jürgen
Wendisch Detlef
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