Results 1 to 10 of about 2,289,697 (227)
Degradation changes stable carbon isotope depth profiles in palsa peatlands [PDF]
Biogeosciences, 2014 Palsa peatlands are a significant carbon pool in the global carbon cycle and are projected to change by global warming due to accelerated permafrost thaw. Our aim was to use stable carbon isotopes as indicators of palsa degradation.
J. P. Krüger, J. Leifeld, C. Alewell
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Isotopes in pyrogenic carbon: A review [PDF]
Organic Geochemistry, 2012 Pyrogenic carbon (PC; also known as biochar, charcoal, black carbon and soot) derived from natural and anthropogenic burning plays a major, but poorly quantified, role in the global carbon cycle. Isotopes provide a fundamental fingerprint of the source of PC and a powerful tracer of interactions between PC and the environment.
Bird, M.I., Ascough, P.L.
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Enantioselective Carbon Isotope Exchange [PDF]
Journal of the American Chemical SocietyThe synthesis of isotopically labeled organic molecules is vital for drug and agrochemical discovery and development. Carbon isotope exchange is emerging as a leading method to generate carbon-labeled targets, which are sought due to their enhanced stability in biological systems.
Michael G. J. Doyle +4 more
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An investigation into the archaeological application of carbon stable isotope analysis used to establish crop water availability: solutions and ways forward [PDF]
, 2011 Carbon stable isotope analysis of charred cereal remains is a relatively new method employed by archaeological scientists to investigate ancient climate and irrigation regimes. The aim of this study was to assess the effect of environmental variables
Jenkins, Emma L. +2 more
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Benthic alkalinity fluxes from coastal sediments of the Baltic and North seas: comparing approaches and identifying knowledge gaps [PDF]
Biogeosciences, 2022 Benthic alkalinity production is often suggested as a major driver of net carbon sequestration in continental shelf ecosystems. However, information on and direct measurements of benthic alkalinity fluxes are limited and are especially challenging when ...
B. Van Dam +12 more
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Carbon isotope anomaly in the major plant C-1 pool and its global biogeochemical implications [PDF]
, 2004 We report that the most abundant C-1 units of terrestrial plants, the methoxyl groups of pectin and lignin, have a unique carbon isotope signature exceptionally depleted in C-13.
Kalin, R. +4 more
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Research Progress on Spatiotemporal Distribution Characteristics of Carbon Stable Isotopes in Wines from New and Old World Countries [PDF]
Shipin Kexue, 2023 With the continuous development of economic globalization, the production and consumption of wine in New and Old World countries have shown a steady growth trend. Wines of different grades and styles have been developed, which are related to geographical
MA Yanfei, SU Yingyue, WANG Lishan, QI Pengyu, KANG Tianhao, WANG Li, MA Haiyan, XU Guoqian, ZHANG Ang
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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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Shiyou shiyan dizhi, 2022 Chinese marine source rocks are generally at the stage of high- to over-mature, there are still some uncertainties about whether the existing hydrocarbon isotopic indexes can be directly employed to distinguish the genetic types of marine carbonate ...
Lei CHEN +3 more
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Journal of Isotopes, 2022 Ethanol is a feasible medium for diffusion separation of carbon isotopes. In order to obtain the separation coefficient of gas diffusion separation of ethanol, the application of elemental analysis isotope ratio mass spectrometry (EA-IRMS) to measure the
WANG Fei;PAN Jianxiong;ZHOU Mingsheng;JIANG Dongjun;LI Junjie
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