Results 11 to 20 of about 43,291 (164)
MethodsX, 2023 Non-exchangeable hydrogen-isotope (δ2Hn) measurements of complex organic samples are used in forensics to determine sample authenticity, traceability, and provenance.
Leonard I. Wassenaar +3 more
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Recent Progresses in Stable Isotope Analysis of Cellulose Extracted from Tree Rings
Plants, 2021 In this work, the challenges and progression in stable isotope investigation, from the analytical tools and technical sample preparation procedures to the dendroclimatological experiments, were reviewed in terms of their use to assess tree physiological ...
Silviu-Laurentiu Badea +2 more
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Effects of alkalinity and salinity at low and high light intensity on hydrogen isotope fractionation of long-chain alkenones produced by Emiliania huxleyi [PDF]
Biogeosciences, 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
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Isotope Effects on Chemical Shifts in the Study of Hydrogen Bonds in Small Molecules
Molecules, 2022 This review is giving a short introduction to the techniques used to investigate isotope effects on NMR chemical shifts. The review is discussing how isotope effects on chemical shifts can be used to elucidate the importance of either intra- or ...
Poul Erik Hansen
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Frontiers in Microbiology, 2019 We determined 2H stable isotope fractionation at natural abundances associated with hydrogenase activity by whole cells of Desulfovibrio vulgaris strain Miyazaki F expressing a NiFe(Se) hydrogenase.
Michaela Löffler +3 more
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Mass spectrometric measurement of hydrogen isotope fractionation for the reactions of chloromethane with OH and Cl [PDF]
Atmospheric Chemistry and Physics, 2018 Chloromethane (CH3Cl) is an important provider of chlorine to the stratosphere but detailed knowledge of its budget is missing. Stable isotope analysis is a potentially powerful tool to constrain CH3Cl flux estimates.
F. Keppler +11 more
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Isotope Effects on Chemical Shifts in the Study of Intramolecular Hydrogen Bonds
Molecules, 2015 The paper deals with the use of isotope effects on chemical shifts in characterizing intramolecular hydrogen bonds. Both so-called resonance-assisted (RAHB) and non-RAHB systems are treated. The importance of RAHB will be discussed.
Poul Erik Hansen
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Temperature dependence of hydrogen isotope effect in LaNi5-H(D) system
Nuclear Analysis, 2023 To study inverse effect of hydrogen isotopes in LaNi5 for hydrogen isotope separation at ambient temperature, temperature dependence of hydrogen isotope effect in LaNi5－H(D) system was investigated in the temperature range -70 °C to 3 °C.
Weiwei Wang +6 more
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Bifunctional catalytic activity of anion-doped LaSrCoO4 for oxygen reduction and evolution reactions
Royal Society Open ScienceHere, we synthesized Co-based, anion-incorporated Ruddlesden–Popper perovskite electrocatalysts (LaSrCoO4−x X y ) and compared their catalytic performances in the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER).
Ittoku Nozawa, Hidehisa Hagiwara
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Nuclear Materials and Energy, 2017 Four sets of targets were used in this study: (1) Fe targets surrounded with 304 type stainless steel composed of mid-Z elements: Fe, Cr, Ni, and Mn (designated as Fe[304SS] targets), (2) Fe targets surrounded with high-Z tungsten (designated as Fe[W ...
V.Kh. Alimov +6 more
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