Results 281 to 290 of about 1,812,757 (349)
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Nature, 1956
THERE appears to be some confusion1–3 in the derivation and application of certain relationships featuring the separation factor for hydrogen (H) and deuterium (D) chemical-exchange processes.
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THERE appears to be some confusion1–3 in the derivation and application of certain relationships featuring the separation factor for hydrogen (H) and deuterium (D) chemical-exchange processes.
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MUON CAPTURE IN HYDROGEN ISOTOPES
Nuclear Physics A, 1981Abstract After a survey of the phenomenology of muonic hydrogen atoms and molecules recent experiments at SIN are discussed, dealing with muonic atoms and molecules in deuterium. These experiments could clarify the longstanding problem of hyperfine populations of muonic deuterium atoms.
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Base metal‐catalyzed hydrogen isotope exchange
Journal of Labelled Compounds and Radiopharmaceuticals, 2020Hydrogen isotope exchange (HIE) has played an increasingly important role in deuteration and tritiation of compounds in the pharmaceutical industry. Transition metal‐catalyzed HIE methods have gained considerable attention in the past decades, and most of these methods were comprehensively reviewed in 2010 in a special JLCR issue.
Haifeng Yang, David Hesk
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Nature, 1967
HYDROGEN isotope diffusion in metals and polymers has generally been treated in the literature as a single body problem with the motion of the hydrogen regarded as the important parameter. On this basis the equation for interstitial diffusion of hydrogen atoms in metals or molecular diffusion in polymers follows an equation of the form
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HYDROGEN isotope diffusion in metals and polymers has generally been treated in the literature as a single body problem with the motion of the hydrogen regarded as the important parameter. On this basis the equation for interstitial diffusion of hydrogen atoms in metals or molecular diffusion in polymers follows an equation of the form
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Noncovalent Hydrogen Isotope Effects
Russian Journal of Physical Chemistry A, 2018Zero-point energies (ZPE) and isotope effects, induced by intermolecular, noncovalent vibrations, are computed and tested by experimental data. The ZPE differences of H- and D-complexes of water with hydrogen, methane, and water molecules are about 100–300 cal/mol; they result to isotope effects IE of 1.20–1.70.
A. L. Buchachenko, N. N. Breslavskaya
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Hydrogen isotope exchange in tungsten during heating in hydrogen isotope gas atmosphere
Fusion Engineering and Design, 2020Abstract In the present study, successive exposure to tritium gas and deuterium gas was performed at elevated temperatures for tungsten samples with irradiation defects created by helium ion irradiation to investigate the effects of hydrogen isotope exchange on tritium removal.
Yuji Nobuta +3 more
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Dataset of stable isotopes of precipitation in the Eurasian continent
Earth System Science Data. Stable isotopes in precipitation can effectively reveal the process of atmospheric water circulation, serving as an effective tool for hydrological and water resource research, climate change, and ecosystem studies.
Longhu Chen +9 more
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The Isotope Effect in Hydrogen-Bonded Systems
International Journal of Modern Physics B, 1998The giant isotope effect on the ferro- and antiferroelectric transition temperature upon deuteration of hydrogen-bonded systems is well known experimentally since various decades. Yet, theoretically only recently a microscopic understanding of this effect has been achieved which, specifically, took into account the geometry of the O ⋯ H ⋯ O bond.
Bussmann-Holder, A., Michel, Karl H.
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Primary Hydrogen Isotope Effects
1978The important relationship between enzyme catalysis and the enhanced affinity of an enzyme for its substrate in the transition state was first noted by Pauling in 1948.(1) In recent years, attention has been focused on the design of stable analogs of transition states of enzyme reactions, since the structure of high-affinity analogs can provide ...
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Solvent Hydrogen Isotope Effects
1978Biological and biochemical processes are affected by the partial or complete replacement of solvent protium oxide (H2O) by deuterium oxide (D2O) (1) Although some very simple organisms (certain algae, bacteria, etc.) have survived complete replacement of protium by deuterium, differences in morphology and metabolism are very apparent. Not surprisingly,
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