Results 21 to 30 of about 3,466,743 (324)
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 +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 +11 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 +6 more
core +2 more sources
Diversity, 2020 The input of new nutrients by upwelling in shelf waters, and the associated carbon and nitrogen fluxes, can be traced by their stable isotope signatures in organic matter.
Antonio Bode +2 more
doaj +1 more source
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
doaj +1 more source
The effect of 12C + 12C rate uncertainties on s-process yields [PDF]
, 2010 The slow neutron capture process in massive stars (the weak s-process) produces most of the s-only isotopes in the mass region 60 < A < 90. The nuclear reaction rates used in simulations of this process have a profound effect on the final s-process ...
A Hungerford +19 more
core +1 more source
Centrifugal Separation of Carbon Isotopes Using Heptafluoropropane as Processing Gas
Journal of Isotopes, 2020 The demand for stable isotopes has increased in the field of medical diagnosis, biopharming, quantum communication and so on. Natural carbon has two stable isotopes: 12C (98.89%) and 13C (1.11%). 13C in high abundance is mainly used in tracer field.
SUN Qiming;JIAN Conghui;ZHOU Mingsheng;PEI Gen
doaj +1 more source
Frontiers in Environmental Science, 2022 Lakes are currently responsible for a significant amount of total natural methane emission. Microbial oxidation of methane plays a central role in Arctic carbon cycling, potentially reducing methane emissions from lakes, though little is known about ...
Sarah B. Cadieux +6 more
doaj +1 more source
Dual stable isotope abundances unravel trophic position of estuarine nematodes [PDF]
, 2005 The role and quantitative importance of free-living nematodes in marine and estuarine soft sediments remain enigmatic for lack of empirical evidence on the feeding habits and trophic position of most nematode species.
BOUILLON, S, GALLUCCI, F, Moens, Tom
core +1 more source
Compiled records of carbon isotopes in atmospheric CO2 for historical simulations in CMIP6
, 2017 . The isotopic composition of carbon (Δ14C and δ13C) in atmospheric CO2 and in oceanic and terrestrial carbon reservoirs is influenced by anthropogenic emissions and by natural carbon exchanges, which can respond to and drive changes in climate ...
H. Graven +11 more
semanticscholar +1 more source