搜索结果: 1-10 共查到“地球化学 hydrogen”相关记录10条 . 查询时间(0.015 秒)
Hydrogen diffusion in the apatite-water system: Fluorapatite parallel to the c-axis
apatite hydrogen diffusion H-D exchange H2O SIMS
2017/4/10
Many studies in the past decade have sought to explore the origin and evolution of water in planetary bodies based on
the hydrogen isotopic compositions of apatite. However, no investigation has stud...
Hydrogen and oxygen isotopic characteristics of precipitation in coastal areas of Japan determined by observations for 23 years at Akita and for 1–2 years at other several localities
Japanese meteoric water precipitation hydrogen isotopic ratio oxygen isotopic ratio d-valu
2017/4/11
The hydrogen and oxygen isotopic characteristics of precipitation in coastal areas of Japan were explained on the basis
of a long period (23 years) observation of hydrogen and oxygen isotopic ratios ...
Characteristics of hydrogen and oxygen stable isotope ratios in precipitation collected in a snowfall region, Aomori Prefecture, Japan
hydrogen isotope ratio oxygen isotope ratio d-excess seasonal variation Aomori Prefecture
2017/4/10
Characteristics of δ2
H and δ18O in precipitation samples collected at 16- to 17-d intervals at three stations at the
northern end of Honshu Island, Japan, were investigated. Rokkasho and Ajigasawa ...
Sulfur, oxygen, and hydrogen isotope compositions of precipitation in Seoul, South Korea
sulfur isotope oxygen hydrogen pollution precipitation sulfate Korea East Asia
2017/4/11
To evaluate the source of sulfur and the extent of seasonal and local characteristics in Seoul’s precipitation chemistry,
we measured sulfur, oxygen, and hydrogen isotopic ratios of precipitation. Th...
Hydrogen and carbon isotope fractionation by thermophilic hydrogenotrophic methanogens from a deep aquifer under coculture with fermenters
methane isotope fractionation hydrogenotrophic methanogen syntrophic cooperation hydrogen concentration
2017/4/11
To elucidate the isotope geochemistry of CH4 production in deep subsurface environments, we investigated the relation
between H2 concentration and hydrogen and carbon isotope fractionation by CO2 red...
Anomalous Strong Reflections on High Resolution Seismic Data from the Turkish Shelf of the Eastern Black Sea: Possible Indicators of Shallow Hydrogen Sulphide-Rich Gas Hydrate Layers
Black Sea gas hydrate hydrogen sulphide high-resolution acoustic methods
2009/7/7
Some strong reflections about 3 to 5 m thick were observed at depths of 25-60 metres below the sea floor using deep-towed, 5 kHz subbottom profiler data in the Turkish shelf and upper slope of the Ea...
Hydrogen isotope ratios of terrigenous n-alkanes in lacustrine surface sediment of the Tibetan Plateau record the precipitation signal
n-alkanes lacustrine sediment terrestrial origin hydrogen isotope ratio precipitation climate
2017/8/10
Hydrogen isotope ratios were measured on terrigenous alkanes (n-C25 to n-C31) extracted from recent lake surface sediments from the climatically and environmentally distinct basins Qiangyong Glacier L...
Hydrogen Isotopic (D/H) Composition of Organic Matter During Diagenesis and Thermal Maturation
deuterium, fossil fuel isotope exchange isotope fractionation catagenesis
2014/4/8
Changes in the D/H ratio of sedimentary organic matter (SOM) during thermal maturation have been difficult to interpret because the effects of hydrogen exchange and
kinetic fractionations are c...
Correction of H3 + Contributions in Hydrogen Isotope Ratio Monitoring Mass Spectrometry
Hydrogen Isotope Ratio Monitoring Mass Correction
2014/4/8
Two fundamentally different approaches, termed “pointwise” and “peakwise,” are currently used to correct
hydrogen isotope ratio monitoring data for the presence
of H3
+
ion contributions. Consider...
Fractionation of hydrogen isotopes in lipid biosynthesis
lipid biosynthesis hydrogen isotopes
2014/4/8
Isotopic compositions of carbon-bound hydrogen in individual compounds from eight di€erent organisms were
measured using isotope-ratio-monitoring gas chromatography±mass spectrometry. This techn...