能够支付
发表于 2025-3-26 22:44:35
Mass Spectrometry in Organic Geochemistry,rs in the analysis of the components of crude oil. Such applications were concerned primarily with quantitative analytical problems, with emphasis on the determination of compound types which constitute a given petroleum sample, and the number of papers on this subject is legion. In recent years — a
aneurysm
发表于 2025-3-27 04:10:01
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HIKE
发表于 2025-3-27 09:14:30
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ADAGE
发表于 2025-3-27 13:06:57
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CALL
发表于 2025-3-27 16:21:43
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TEM
发表于 2025-3-27 18:54:13
Organic Matter in Sediments,y be carbonaceous material produced in early Precambrian times by abiotic processes taking place before the first living cells came into existence. Therefore, organic matter may be found in sediments even older than organized organic life. At present we find it in fossil form in sediments as old as
不幸的人
发表于 2025-3-27 21:58:25
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kindred
发表于 2025-3-28 05:16:47
Biogeochemistry of Stable Carbon Isotopes,. At the same time, A. O. . designed a new mass spectrometer which allowed the measurement of small differences in isotope abundance ratios. A modification in the Nier-type mass spectrometer and a refinement in instrumentation techniques by ... finally initiated stable isotope studies of the
DUST
发表于 2025-3-28 09:12:49
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Carcinogen
发表于 2025-3-28 14:23:45
Fatty Acids and Alcohols,oup concerned with fatty acid geochemistry has produced qualitatively new data and relationships. Several factors make fatty acids favorable organic molecules for geochemical study; they are major components of most organisms, many of them have the intrinsic chemical stability to persist for geologi