Results 1 to 10 of about 1,228 (68)
Yankuang ceshi, 2021 BACKGROUND Before analyzing the carbon isotopes of n-alkanes by gas chromatography-gas isotope mass spectrometry (GC-IRMS), it is necessary to pre-separate and enrich n-alkanes and isoparaffins in saturated hydrocarbon samples. Whether the carbon isotope
DONG Hao-wei +6 more
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Sources of PM2.5-Associated PAHs and n-alkanes in Changzhou China
Atmosphere, 2021 Polycyclic aromatic hydrocarbons (PAHs) and n-alkanes are important specific organic constituents in fine particulate matter (PM2.5). Seventy-five PM2.5 samples were collected in Spring Changzhou, to investigate the concentrations and sources of n ...
Ning Sun +5 more
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Alkanes from plants of the genus achillea [PDF]
Journal of the Serbian Chemical Society, 1999 The hydrocarbon fractions of three species of Achillea L. have been analysed by capillary gas chromatography (GC) and GC-mass spectrometry(GC-MS) and were shown to consist of the conventional, odd-carbon number dominant distributions of n-alkane
Palić Radosav +5 more
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Characteristics of particulate-bound n-alkanes indicating sources of PM2.5 in Beijing, China [PDF]
Atmospheric Chemistry and Physics, 2023 The characteristics of n-alkanes and the contributions of various sources of fine particulate matter (PM2.5) in the atmosphere in Beijing were investigated. PM2.5 samples were collected at Minzu University of China between November 2020 and October 2021,
J. Yang +9 more
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Distribution and sources of n-alkanes in surface sediments of Taihu Lake, China
Archives of Environmental Protection, 2016 The last study on n-alkanes in surface sediments of Taihu Lake was in 2000, only 13 surface sediment samples were analysed, in order to have a comprehensive and up-to-date understanding of n-alkanes in the surface sediments of Taihu Lake, 41 surface ...
Yu Yunlong +3 more
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Stable isotope labeled n-alkanes to assess digesta passage kinetics through the digestive tract of ruminants. [PDF]
PLoS ONE, 2013 We describe the use of carbon stable isotope ((13)C) labeled n-alkanes as a potential internal tracer to assess passage kinetics of ingested nutrients in ruminants.
Daniel Warner +4 more
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Geosciences, 2021 This study investigates the magnitude and direction of stable C and H isotope shifts of n-C15–30 alkanes from biodegraded oils sourced from Type II (Oil suite S) and Type II/III (Oil suite H) kerogens.
Nikolai Pedentchouk +2 more
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Frontiers in Earth Science, 2017 Leaf wax n-alkanes are broadly used to reconstruct paleoenvironmental information. However, the utility of n-alkanes as a paleoenvironmental proxy may be modulated by the extent to which biological as well as environmental factors influence the ...
Amanda L. D. Bender +2 more
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Yankuang ceshi, 2017 The extraction procedure using solvent mixtures has been used to elute n-alkanes adsorped by 5Å molecular sieve and subsequent stable carbon isotope ratio analysis of individual n-alkanes.
CHEN Sha-sha +4 more
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TRANSFORMATION OF SHORT-CHAIN n-ALKANES UNDER TREATMENT OF HYDRODYNAMIC CAVITATION
Тонкие химические технологии, 2017 The structure and properties of oil disperse systems (ODS) are mainly determined by the presence of paraffin hydrocarbons (n-alkanes) in the crude oil and natural gas liquid. Short-chain n-alkanes (С8-С17) are part of ODS dispersion medium.
V. N. Torkhovsky +3 more
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