Results 1 to 10 of about 20,802 (165)

Stable Isotope Fractionation of Metals and Metalloids in Plants: A Review [PDF]

open access: yesFrontiers in Plant Science, 2022
This work critically reviews stable isotope fractionation of essential (B, Mg, K, Ca, Fe, Ni, Cu, Zn, Mo), beneficial (Si), and non-essential (Cd, Tl) metals and metalloids in plants.
Matthias Wiggenhauser   +5 more
doaj   +2 more sources

Atmospheric Hg(0) dry deposition over environmental surfaces: Insights from mercury isotope fractionation [PDF]

open access: yesEco-Environment & Health
Atmospheric Hg(0) dry deposition is a vital process that significantly affects the global distribution and cycling of Hg. However, significant knowledge gaps and challenges remain in understanding atmospheric Hg(0) deposition and its subsequent post ...
Yanwei Liu   +8 more
doaj   +2 more sources

Oxygen Isotope Fractionation between Carbonate Minerals and Carbonic Acid Systems and Constraints for Environmental Science and Geological Processes [PDF]

open access: yesMolecules
The equilibrium oxygen isotope fractionation factor is widely used in geological thermometry. However, under most natural conditions, the oxygen isotope exchange is rare to reach equilibrium. Especially for the complex water–rock interaction process, the
Jixi Zhang
doaj   +2 more sources

Effects of alkalinity and salinity at low and high light intensity on hydrogen isotope fractionation of long-chain alkenones produced by Emiliania huxleyi [PDF]

open access: yesBiogeosciences, 2017
Over the last decade, hydrogen isotopes of long-chain alkenones have been shown to be a promising proxy for reconstructing paleo sea surface salinity due to a strong hydrogen isotope fractionation response to salinity across different environmental ...
G. M. Weiss   +6 more
doaj   +1 more source

A New Method for Silicon Triple Isotope Analysis With Application to Siliceous Sponge Spicules

open access: yesGeochemistry, Geophysics, Geosystems, 2023
Multiple isotope ratios of elements disclose information on the fractionation mechanism that cannot be obtained from a single isotope ratio alone.
Andreas Pack   +3 more
doaj   +1 more source

Study on Specific Carbon Isotope Fractionation of n-Alkanes during Column Chromatography Separation-Molecular Sieve Complexation Adsorption

open access: yesYankuang ceshi, 2021
BACKGROUND Before analyzing the carbon isotopes of n-alkanes by gas chromatography-gas isotope mass spectrometry (GC-IRMS), it is necessary to pre-separate and enrich n-alkanes and isoparaffins in saturated hydrocarbon samples. Whether the carbon isotope
DONG Hao-wei   +6 more
doaj   +1 more source

The influence of snow sublimation and meltwater evaporation on δD of water vapor in the atmospheric boundary layer of central Europe [PDF]

open access: yesAtmospheric Chemistry and Physics, 2017
Post-depositional fractionation of stable water isotopes due to fractionating surface evaporation introduces uncertainty to various isotope applications such as the reconstruction of paleotemperatures, paleoaltimetry, and the investigation of groundwater
E. Christner, M. Kohler, M. Schneider
doaj   +1 more source

Advances in Research on Uranium Isotope Fraction in Nature and Prospects

open access: yesHe huaxue yu fangshe huaxue, 2022
Uranium is the heaviest naturally occurring radioactive element in nature, and it is widely distributed in the earth’s crust. With the improvement of the technical accuracy of mass spectrometry to measure uranium isotope ratios, it is gradually ...
SONG Jing   +5 more
doaj   +1 more source

Magnesium Isotope Composition of Different Geological Reservoirs and Controlling Factors of Magnesium Isotope Fractionation in the Formation of Carbonate Minerals-A Summary of Previous Results

open access: yesYankuang ceshi, 2020
BACKGROUND Magnesium isotope fractionation effect during low-temperature geochemical processes is the foundation of tracing supergene evolution and material cycle of the earth.
TANG Bo, WANG Jing-teng, FU Yong
doaj   +1 more source

Magnesium Isotopes in Pore Water of Active Methane Seeps of the South China Sea

open access: yesFrontiers in Marine Science, 2022
The magnesium (Mg) isotopic composition of marine authigenic carbonates is considered as promising archive of ancient seawater geochemistry and paleoenvironments.
Meng Jin   +12 more
doaj   +1 more source

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