Results 1 to 10 of about 3,012,109 (369)
Carbon isotopes in clastic rocks and the Neoproterozoic carbon cycle [PDF]
American Journal of Science, 2020 It has been proposed that isotopically light inorganic carbon precipitated diagenetically in clastic sediments can explain the large carbon isotopic excursions recorded in Neoproterozoic carbonates.
D. Canfield +4 more
semanticscholar +4 more sources
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.
M. Bird, P. Ascough
semanticscholar +4 more sources
Stable carbon isotopes and human evolution. [PDF]
Proc Natl Acad Sci U S A, 2013 Klein RG.
europepmc +2 more sources
Shiyou shiyan dizhi, 2023 As an important technological measure to uncover complex sedimentary-diagenetic process, microzone in situ geochemical analysis has drawn more and more attention along with improving analytical and test levels.
Jun HAN +4 more
doaj +1 more source
Presenting the Compendium Isotoporum Medii Aevi, a Multi-Isotope Database for Medieval Europe
Scientific Data, 2022 Measurement(s) Isotopes Technology Type(s) Mass Spectrometry Factor Type(s) Carbon isotopes • nitrogen isotopes • sulfur isotopes • oxygen isotopes • strontium isotopes Sample Characteristic - Organism Humans • Animals • Plants Sample Characteristic ...
Carlo Cocozza +4 more
doaj +1 more source
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
doaj +1 more source
Sedimentary pyrite sulfur isotopes track the local dynamics of the Peruvian oxygen minimum zone
Nature Communications, 2021 To explore the importance of local vs. global sulfur-cycle controls on variations in pyrite sulfur isotopes, the authors couple carbon-nitrogen-sulfur concentrations and stable isotopes of sediments from the Peruvian oxygen minimum zone, identifying a ...
Virgil Pasquier +2 more
doaj +1 more source
EXOTIC STRUCTURE OF CARBON ISOTOPES [PDF]
Frontiers of Collective Motions, 2003 31 pages, 19 eps ...
Kouichi Hagino +2 more
openaire +3 more sources
Energy Exploration & Exploitation, 2023 C 5 –C 7 light hydrocarbons are important components in petroleum and are extensively employed as an auxiliary approach in petroleum research. Consensus on the mechanism of light hydrocarbon generation has not yet been achieved.
Chen Zhang +5 more
doaj +1 more source
Centrifugal Separation of Carbon and Chlorine Isotopes Using Freon-11 as Processing Gas
Journal of Isotopes, 2017 In order to explore the effective ways for high-abundance carbon and chlorine isotopes production, a method to acquire high-abundance carbon-12 and chlorine-35 isotopes simultaneously was presented by gas centrifugation process using Freon-11 as ...
PEI Gen;ZHOU Ming-sheng;JIANG Dong-jun
doaj +1 more source