Molecular geochemical methods have shown that it is often dicult to di€erentiate between coaland interbedded shale-sourced oils, even though coals and interbedded shales may exhibit considerable organic in ̄ux variation (e.g. land plant vs algal organic matter) due to the changes of depositional setting. However, compound-speci®c stable carbon isotopic compositions are sensitive to the source i...

The chemical composition of the lipids in wheat straw was studied in detail by gas chromatography and mass spectrometry. Important discrepancies with the data reported in previous papers were found. The predominant lipids identified were series of long-chain free fatty acids (25% of total extract), followed by series of free fatty alcohols (ca. 20%). High molecular weight esters of long chain f...

There is an increasing demand for kinetic models of surrogate components to predict the combustion and emissions real fuels. In this paper, a new fuel mechanism, C3MechV3.3, proposed by Computational Chemistry Consortium (C3). This mechanism constructed based on C0 – C4 core with important species interest in complex surrogates such as hexane isomers, n-heptane, iso-octane, nC8 nC12 linear alka...

The purpose of the present work is to show that light straight-run gasoline fraction can be used as feedstock for hydro-catalytic isomerization process, and isomerized product serve a component obtaining pure ecological commercial brand Euro-4 Euro-5. Transformation n-alkanes Zhanazhol oil’s with boiling temperature 180°C was studied. Isomerization carried out in flow unit stationary layer modi...

Cell suspensions of methane-utilizing bacteria grown on methane oxidized n-alkanes (propane, butane, pentane, hexane) to their corresponding methylketones (acetone, 2-butanone, 2-pentanone, 2-hexanone). The product methylketones accumulated extracellularly. The rate of production of methylketones varied with the organism used for oxidation; however, the average rate of acetone, 2-butanone, 2-pe...

Many biological and geochemical questions remain concerning the structures, functions, and properties of naturally occurring high-molecular-weight (C40+) alkanes with various mid-chain alkylation patterns. Above C40, these alkanes are exceedingly difficult to separate and purify, and syntheses can be blocked by the low solubility of intermediates. To overcome these problems, a facile three-step...

Twelve surface sediments from the southern Okinawa Trough (OT) and nine surface sediments from a nearby river, the Lanyang River (LR), with high sediment discharge were analyzed for comparison of their aliphatic hydrocarbon distributions. Performing cluster analysis on all hydrocarbon data of LR and OT sediments showed that the two areas had a similarity level of only 0.15, meaning that they we...