Results 31 to 40 of about 2,285,311 (372)
Shuiwen dizhi gongcheng dizhi, 2023 The hydrogen and oxygen isotopes in precipitation have the altitude effect, and they participate in the groundwater circulation after the infiltration of precipitation.
Pengfei HAN +3 more
doaj +1 more source
The geologic history of seawater oxygen isotopes from marine iron oxides
Science, 2019 Not as hot as we thought Earth's early oceans appear not to have been as hot as some have suggested. The oxygen isotope composition of marine carbonates has changed markedly over the past 3.5 billion years.
Nir Galili +17 more
semanticscholar +1 more source
Petroleum Research, 2017 Carbon and oxygen isotopes of marine carbonate rocks or fossil shells could indicate global sea-level relative change. Generally, heavier carbon isotopes or lighter oxygen isotopes reflected rise of global sea-level relative changes, and vice versa.
Zongju Zhao, Jianguo Wang, Peixi Wang
doaj +1 more source
Journal of Water and Climate Change, 2021 In recent years, stable isotopes of the water molecule (oxygen-18 and deuterium) have become a useful tool for tracking the water cycle. The concentration of these tracers changes with variations of water molecules within the water cycle.
Sara Nazif +2 more
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Seasonal Cyclicity in Trace Elements and Stable Isotopes of Modern Horse Enamel. [PDF]
PLoS ONE, 2016 The study of stable isotopes in fossil bioapatite has yielded useful results and has shown that bioapatites are able to faithfully record paleo-environmental and paleo-climatic parameters from archeological to geological timescales.
Niels J de Winter +2 more
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Chiral three-nucleon forces and bound excited states in neutron-rich oxygen isotopes [PDF]
, 2013 We study the spectra of neutron-rich oxygen isotopes based on chiral two- and three-nucleon interactions. First, we benchmark our many-body approach by comparing ground-state energies to coupled-cluster results for the same two-nucleon interaction, with ...
A. Schiller +57 more
core +2 more sources
Isotopic Fingerprinting: A Promising Tool for Coffee Authenticity Checks
Proceedings, 2023 Almost every physical or chemical process in nature favors certain light stable isotopes over others, and thereby leaves an isotopic “fingerprint” on the substances involved.
Johannes Wintel +4 more
doaj +1 more source
Towards a global interpretation of dual nitrate isotopes in surface waters [PDF]
, 2019 Modern anthropogenic activities have significantly increased nitrate (NO3-) concentrations in surface waters. Stable isotopes (delta N-15 and delta O-18) in NO3- offer a tool to deconvolute some of the human-made changes in the nitrogen cycle.
Boeckx, Pascal +2 more
core +2 more sources
Ab-initio computation of neutron-rich oxygen isotopes [PDF]
, 2009 We compute the binding energy of neutron-rich oxygen isotopes and employ the coupled-cluster method and chiral nucleon-nucleon interactions at next-to-next-to-next-to-leading order with two different cutoffs.
A. Nogga +5 more
core +1 more source
Chiral three-nucleon forces and the evolution of correlations along the oxygen isotopic chain [PDF]
, 2015 The impact of three-nucleon forces (3NFs) along the oxygen chain is investigated for the spectral distribution for attachment and removal of a nucleon, spectroscopic factors and matter radii. We employ self-consistent Green's function (SCGF) theory which
Barbieri, C. +2 more
core +2 more sources