Results 21 to 30 of about 2,105,092 (295)

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

Applications of stable water and carbon isotopes in watershed research: Weathering, carbon cycling, and water balances [PDF]

, 2011
Research on rivers has traditionally involved concentration and flux measurements to better understand weathering, transport and cycling of materials from land to ocean.
Petelet-Giraud, Emmanuelle, Philippe Négrel, Heiko Freitag, Schulte, Peter, Van Geldern, Robert, Jean-Luc Probst, Peter Schulte, Ajaz Karim, Kevin Telmer, Johannes A.C. Barth, Probst, Jean-Luc, Freitag, Heiko, Karim, Ajaz, Robert van Geldern, Anne Probst, Telmer, Kevin, Négrel, Philippe, Barth, Johannes A.C., Probst, Anne, Ján Veizer, Veizer, Jan, Emmanuelle Petelet-Giraud, Barth, J. A. C., Barth, Johannes A. C.   +23 more
core   +1 more source

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

A STUDY OF QUANTUM ISOTOPIC SIEVING THORUGH CARBON NANOTUBES [PDF]

, 2013
The theory of molecular sieving has long been a subject of importance because of its widespread technological applications .Classical molecular sieving mainly de- pends on the size and shape of the guest molecules and the size of the host solid.
Dasgupta, Devagnik
core   +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

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

Stable and radiogenic isotopes as tracers for soil degradation [PDF]

, 2008
Soil erosion seriously threatens mountain slopes. Direct measurement of soil erosion in the field is difficult and needs long term recording. However, stable and radiogenic isotopes are potential tracers for soil erosion estimation and would enable a ...
Schaub, Monika
core   +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

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

A method to detect soil carbon degradation during soil erosion [PDF]

, 2009
Soil erosion has been discussed intensively but controversial both as a significant source or a significant sink of atmospheric carbon possibly explaining the gap in the global carbon budget.
Conen, F., C. Alewell, F. Conen, Schaub, M., Alewell, C., M. Schaub   +5 more
core   +2 more sources