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ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.This review is about material design based on engineering multilevel sites from theoretical calculation and synthetic routes to mechanism, structure–activity relationship, challenges and perspectives for boosting hydrogen production in alkaline electrolyte. Electrolytic water splitting is a clean, carbon‐free method for producing green hydrogen and has
Ke Zhang +9 more
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Cation Distribution in Li2CaSiO4:Gd, Pr, Na Uncovered Through Anomalous Diffraction
European Journal of Inorganic Chemistry, EarlyView.Li2CaSiO4 co‐doped with Gd3+ and Pr3+ shows strong blue‐to‐UV‐B up‐conversion. Herein, we explore the doping element distribution in order to discern the reason for the strongly supportive co‐doping effect using high‐resolution Rietveld refinement and multiple‐edge anomalous dispersion measurements.
Christoph Rick +4 more
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Chlorine Isotope Fractionation in the Stratosphere [PDF]
Science, 2010 Isotope fractionation in a common refrigerant may provide insights into the mechanism of stratospheric ozone depletion.
Laube, JC +4 more
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Biological fractionation of isotopes
The International Journal of Applied Radiation and Isotopes, 1960The fractionation of isotopes occurs in numerous biological processes, but the effects are always small except in a few cases involving hydrogen and deuterium. Fractionations may be caused by differences in rates of reaction or diffusion, or by differences in equilibrium constants. Very little systematic research has been published on this subject, but
R F, GLASCOCK, W G, DUNCOMBE
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2023
Abstract “Isotopic Fractionation” explores the processes that control how stable isotopes cycle through components of the environment. The chapter describes the emergence of isotopic discrimination during physical processes and chemical reactions involving open and closed systems.
M. Francesca Cotrufo, Yamina Pressler
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Abstract “Isotopic Fractionation” explores the processes that control how stable isotopes cycle through components of the environment. The chapter describes the emergence of isotopic discrimination during physical processes and chemical reactions involving open and closed systems.
M. Francesca Cotrufo, Yamina Pressler
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Modeling Mercury Isotopic Fractionation in the Atmosphere
SSRN Electronic Journal, 2021Mercury (Hg) stable isotope analysis has become a powerful tool to identify Hg sources and to understand its biogeochemical processes. However, it is challenging to link the observed Hg isotope fractionation to its global cycling. Here, we integrate source Hg isotope signatures and process-based Hg isotope fractionation into a three-dimensional isotope
Zhengcheng, Song +2 more
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Fractionation of Mercury Stable Isotopes in Lichens
SSRN Electronic Journal, 2022Bio-monitoring of mercury (Hg) in air using transplanted and in-situ lichens was conducted at three locations in Slovenia: (I) the town of Idrija in the area of the former Hg mine, where Hg contamination is well known; (II) Anhovo, a settlement with a cement production plant, which is a source of Hg contamination, and (III) Pokljuka, a part of a ...
Dominik Božič +6 more
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Isotopic Fractionation of Uranium in Sandstone
Science, 1963Relatively unoxidized black uranium ores from sandstone deposits in the western United States show deviations in the uranium-235 to uranium-234 ratio throughout a range from 40 percent excess uranium-234 to 40 percent deficient uranium-234 with respect to a reference uranium-235 to uranium-234 ratio.
J N, Rosholt, W R, Shields, E L, Garner
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Deuterium Isotope Effect on Carbon Isotope Fractionation in Photosynthesis
Science, 1967Plants grown in D 2 O show a decreased tendency to fractionate carbon-13 during photosynthetic incorporation of carbon dioxide. The isotopic ratio C 13 /C 12 of the tissues of deuterated plants appears to be proportional to the deuterium content of the tissue.
R A, Uphaus, J J, Katz
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Reviews in Mineralogy and Geochemistry, 2017
This review focuses on the rapidly growing field of natural 238U/235U variability, largely driven by the technical advances in the measurement of U isotope ratios by mass spectrometry with increasing precision over the last decade. A thorough review on the application of the U-decay series systems within Earth sciences was published in Reviews in ...
Morten B. Andersen +2 more
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This review focuses on the rapidly growing field of natural 238U/235U variability, largely driven by the technical advances in the measurement of U isotope ratios by mass spectrometry with increasing precision over the last decade. A thorough review on the application of the U-decay series systems within Earth sciences was published in Reviews in ...
Morten B. Andersen +2 more
openaire +1 more source