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- W2069916613 abstract "A series of acyclic isoprenoid hydrocarbons with head-to-tail, tail-to-tail and head-to-head linkages are present as important components in petroleum. This paper presents some evidence for the occurrence of the extended series beyond the C 40 isomers described to date. Thus, the regular head-to-tail homologs up to C 45 have been identified, as well as a new C 21 C 39 series, exhibiting methyl branches in the positions 3, 7, 11, 15,… of the molecule, which could derive from homologue members of the head-to-head series higher than C 40 . To reinforce the mass spectrometric identification of these compounds their gas chromatographic behaviour has been examined and retention indices of individual members compared with those predicted by retention increments. The relative abundance of the above series and the internal distribution of structural isomers in oils and rock extracts are considered as valuable parameters in correlation studies. Such distributions are geochemically significant from the standpoint of the origin and maturation of the sedimentary organic matter. Recent progress in the knowledge of the lipid composition of archaebacteria provides a definite argument for a substantial contribution of bacterial cell-wall lipids to petrogenesis." @default.
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- W2069916613 date "1980-01-01" @default.
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- W2069916613 title "Identification and geochemical significance of long chain acyclic isoprenoid hydrocarbons in crude oils" @default.
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- W2069916613 doi "https://doi.org/10.1016/0079-1946(79)90085-5" @default.
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