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- W2011391704 abstract "The analyses, by gas chromatography and gas chromatography/mass spectrometry, of the triterpane concentrate of crude oils sampled from various oil fields of the Tertiary Niger delta have revealed the ubiquitous presence of a series of C24–C27 tetracyclic alkanes likely to be novel degraded triterpanes. The presence in the crude oils of a C25 tricyclic alkane, apparently structurally related to the tetracyclanes, seemed consistent with the hypothesis of sequential cleavages of the terminal rings of precursor pentacyclic triterpenoid derivatives with increasing thermal transformation of the respective petroleums. The degraded triterpanes might be useful for assessing the stages of thermal evolution of petroleum in the reservoir. A possible application, to oil exploration, of the expected variations in the concentration of the polycyclanes in crude oils with different thermal histories would be in distinguishing primary (immature) oils from mature but biodegraded oils." @default.
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- W2011391704 date "1981-01-01" @default.
- W2011391704 modified "2023-09-24" @default.
- W2011391704 title "C24–C27 Degraded triterpanes in Nigerian petroleum: novel molecular markers of source/input or organic maturation?" @default.
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- W2011391704 doi "https://doi.org/10.1016/0375-6742(81)90095-9" @default.
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