sterane


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sterane

[′sti‚rān]
(organic chemistry)
A cycloalkane derived from a sterol.
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29] sterane probably indicates a strong contribution of aquatic organisms such as green and brown algae (consistent with the contribution of Botryococcus braunii race A and Pediastrum), and some influence of higher plants OM.
Following Rock-Eval, TOC analysis, gas chromatographic (GC) (bulk extract) and gas chromatographic-mass spectrometric (GC-MS) (saturated hydrocarbons sterane and terpane) analyses of extracts obtained from three samples (37-9, 52-12, 53-9) were conducted.
The maturity of the sedimentary organic matter is illustrated in this paper by the extent of hopane and sterane side-chain isomerization reactions.
Key words: diesel exhaust, gasoline exhaust, hopane, mutagenicity, PAHs, particulate matter health effects, principal component analysis, semivolatile organic carbon, sterane, toxicity of motor vehicle emissions.
Saturated hydrocarbon fractions of chloroform bitumen A are mainly composed of n-alkanes, branched alkanes, isoprenoid alkanes, alkyl cyclohexane, cyclic sterane, terpane etc.
The m/z 217 mass chromatograms recorded the sterane distributions of samples analyzed in Fig.
The rates of sterane isomerization (20S/20S + 20R) and bishomohopane isomerization (22S/22S + 22R) indicate that isomerization is not fully completed, and therefore maturity of the samples is less than 0.
Triterpane and sterane distributions were quantified by measuring peak heights in the m/z 191 and m/z 217 chromatograms for saturated hydrocarbons, respectively.
Totally five AAs were detected (Table 7), including alkyl-substituted tetralins (peaks 4 and 8), naphthalene (peak 12) and diphenylmethane (peak 22) along with a sterane (peak 31).