Results 11 to 20 of about 173,935 (289)

Tracing the Deep Carbon Cycle Using Metal Stable Isotopes: Opportunities and Challenges

Engineering, 2019
The subduction of marine carbonates and carbonated oceanic crust to the Earth’s interior and the return of recycled carbon to the surface via volcanism may play a pivotal role in governing Earth’s atmosphere, climate, and biosphere over geologic time ...
Sheng-Ao Liu, Shu-Guang Li
doaj   +3 more sources

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

Carbon Isotopes Near Drip Lines in the Relativistic Mean-Field Theory [PDF]

, 1998
We have investigated the ground-state properties of carbon isotopes in the framework of the relativistic mean-field (RMF) theory. RMF calculations have been performed with the non-linear scalar self-coupling of the $\sigma$ meson using an axially ...
A. Mueller, A. R. Bodmer, A. R. Farhan, B. D. Serot, B. D. Serot, B. D. Serot, E. Liatard, E. Roeckel, G. A. Lalazissis, G. A. Lalazissis, G. A. Lalazissis, G. Audi, H. de Vries, I. Tanihata, I. Tanihata, I. Tanihata, J. Boguta, J. Specht, J. Vervier, M. M. Sharma, M. M. Sharma, M. M. Sharma, M. M. Sharma, M. Yasue, M. Zhukov, P. G. Reinhard, P. J. Simmonds, P. Möller, P. Ring, R. J. Furnstahl, S. Mythili, W. Pöschl, Y. Horikawa, Y. K. Gambhir, Y. Sugahara, Z. Ren   +35 more
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Isotopic Production Cross Sections in Proton-Nucleus Collisions at 200 MeV [PDF]

, 2006
Intermediate mass fragments (IMF) from the interaction of $^{27}$Al, $^{59}$Co and $^{197}$Au with 200 MeV protons were measured in an angular range from 20 degree to 120 degree in the laboratory system.
Aschman, D. G., Baruth-Ram, K., Carter, J., Cowley, A. A., Goldenbaum, F., Machner, H., Nangu, B. M., Pilcher, J. V., Sellschop, J. P. F., Sideras-Haddad, E., Smit, F. D., Spoelstra, B., Steyn, D.   +12 more
core   +2 more sources

Inter-Laboratory Comparison of Measuring Organic Carbon and Stable Nitrogen Isotopes in Marine Sediments by Elemental Analysis-Isotope Ratio Mass Spectrometry

Yankuang ceshi, 2020
BACKGROUND Organic carbon and nitrogen stable isotopes (δ13C, δ15N) in marine sediments are used as effective indicators to trace the changes of air, temperature, precipitation and other parameters in different geological time. Elemental analysis-isotope
CHANG Wen-bo, LI Feng, ZHANG Yuan-yuan, HE Xing-liang   +3 more
doaj   +1 more source

Dry season limnological conditions and basin geology exhibit complex relationships with δ13C and δ15N of carbon sources in four Neotropical floodplains. [PDF]

PLoS ONE, 2017
Studies in freshwater ecosystems are seeking to improve understanding of carbon flow in food webs and stable isotopes have been influential in this work.
Gustavo H Zaia Alves, David J Hoeinghaus, Gislaine I Manetta, Evanilde Benedito   +3 more
doaj   +1 more source

Fingerprinting Blue Carbon: Rationale and Tools to Determine the Source of Organic Carbon in Marine Depositional Environments

Frontiers in Marine Science, 2019
Blue carbon is the organic carbon in oceanic and coastal ecosystems that is captured on centennial to millennial timescales. Maintaining and increasing blue carbon is an integral component of strategies to mitigate global warming.
Nathan R. Geraldi, Alejandra Ortega, Oscar Serrano, Peter I. Macreadie, Catherine E. Lovelock, Catherine E. Lovelock, Dorte Krause-Jensen, Dorte Krause-Jensen, Hilary Kennedy, Paul S. Lavery, Michael L. Pace, Joeri Kaal, Carlos M. Duarte   +12 more
doaj   +1 more source

Terrestrial and fluvial carbon fluxes in a tropical watershed: Nyong basin, Cameroon [PDF]

, 2009
The Nyong watershed, with an area of 27 800 km2 and a mean annual discharge of 390 m3 s−1, is the second largest river in Cameroon. The Nyong watershed serves as an outstanding study area for the examination of carbon fluxes in humid tropical ...
Boeglin, Jean-Loup, Brunet, Frédéric, Dubois, Krystel, Ndam-Ngoupayou, Jules-Rémy, Nkoue Ndondo, Gustave Raoul, Probst, Jean-Luc, Veizer, Jan   +6 more
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Features and origin of oil degraded gas of Santai field in Junggar Basin, NW China

Petroleum Exploration and Development, 2015
Based on comprehensive analysis of the natural gas composition, carbon isotopes and associated oil carbon isotopes, saturated hydrocarbon chromatography, and gas chromatography-mass spectrography, the features and formation mechanisms of natural gas in ...
Jungang LU, Li WANG, Shijia CHEN, Hui HAN, Huanxu ZHANG, Youlin HUANG, Xiaobo HE, Pan ZHAN, Shiying ZHOU, Anran ZHANG, Xiaotian LI   +10 more
doaj   +1 more source

A pilot study of stable isotope fractionation in Bombyx mori rearing

Scientific Reports, 2023
Hydrogen, oxygen, carbon, and nitrogen isotopes derived from three different strains of silkworms at different life stages involved in silkworm rearing, were measured to understand the fractionation characteristics of stable isotopes at different stages ...
Hao Li, Yujie He, Jinzhong Lu, Liling Jia, Yong Liu, Dan Yang, Shuai Shao, Gang Lv, Hailiang Yang, Hailing Zheng, Yang Zhou, Zhiqin Peng   +11 more
doaj   +1 more source