Results 21 to 30 of about 139,618 (290)

Adsorption separation of heavier isotope gases in subnanometer carbon pores

Nature Communications, 2021
Separation of isotopes of heavier gases than hydrogen or helium is essential for biomedical applications, but current methods are very energy and time consuming.
Sanjeev Kumar Ujjain, Abhishek Bagusetty, Yuki Matsuda, Hideki Tanaka, Preety Ahuja, Carla de Tomas, Motomu Sakai, Fernando Vallejos-Burgos, Ryusuke Futamura, Irene Suarez-Martinez, Masahiko Matsukata, Akio Kodama, Giovanni Garberoglio, Yury Gogotsi, J. Karl Johnson, Katsumi Kaneko   +15 more
doaj   +1 more source

Redistribution of hydrogen and oxygen isotopes in groundwater flow systems: From altitude effect to depth effect

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, Xusheng WANG, Xiaowei JIANG, Li WAN   +3 more
doaj   +1 more source

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, B. Velamur Asokan, D. J. Dean, G. Hagen, M. Hjorth-Jensen, T. Papenbrock   +5 more
core   +1 more source

Carbon and oxygen isotope variation and its implication for marine sequence: A case study of Ordovician in Tarim Basin

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

The development of statistical downscaling methods for assessing the effects of climate change on the precipitation isotopes concentration

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, Maryam Mosaffa, Youssef Khalaj Amirhosseini   +2 more
doaj   +1 more source

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, Christophe Snoeck, Philippe Claeys   +2 more
doaj   +1 more source

Radii and binding energies in oxygen isotopes: a puzzle for nuclear forces [PDF]

, 2016
We present a systematic study of both nuclear radii and binding energies in (even) oxygen isotopes from the valley of stability to the neutron drip line.
Barbieri, C., Hergert, H., Holt, J. D., Lapoux, V., Somà, V., Stroberg, S. R.   +5 more
core   +4 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, Corina Knipper, Mila Spross, Ronny Friedrich, Steffen Schwarz   +4 more
doaj   +1 more source

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, A. Schwenk, A. Schwenk, A.F. Lisetskiy, A.P. Zuker, A.T. Gallant, B. Fernández-Domínguez, B.A. Brown, C.R. Hoffman, C.R. Hoffman, D. Cortina-Gil, D. Cortina-Gil, D.J. Dean, D.R. Entem, E. Caurier, E. Caurier, E. Caurier, E. Epelbaum, E. Epelbaum, F. Nowacki, G. Audi, G. Hagen, G. Hagen, G. Hagen, G. Hagen, G. Hagen, G.R. Jansen, J. D. Holt, J. Fujita, J. Menéndez, J.B. McGrory, J.D. Holt, J.W. Holt, K. Hebeler, K. Hebeler, K. Suzuki, K. Suzuki, K. Tsukiyama, K. Tsukiyama, K. Tsukiyama, M. Hjorth-Jensen, M. Stanoiu, M. Thoennessen, N. Michel, O. Jensen, R. Kanungo, S. Okubo, S.K. Bogner, S.K. Bogner, S.K. Bogner, S.Y. Lee, T. Lesinski, T. Otsuka, T. Otsuka, T.T.S. Kuo, U. van Kolck, Y. Utsuno, Z. Elekes   +57 more
core   +2 more sources

Hydrochemical and stable isotopes (δ2H and δ18O) changes of groundwater from a spring induced by local earthquakes, Northwest China

Frontiers in Earth Science, 2023
It has been well reported that earthquakes can cause changes in groundwater chemistry and isotopes, and much of those changes were occurred in wells or hot springs; however, changes in cold spring caused by local small earthquakes have received less ...
Yang Xiang, Yang Xiang, Suping Peng, Suping Peng   +3 more
doaj   +1 more source