Results 21 to 30 of about 24,904 (238)

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

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

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

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

Subbarrier interactions of the oxygen isotopes [PDF]

Physical Review C, 1987
We derive a unified description of the low-energy elastic, inelastic, neutron transfer, and fusion cross sections of systems involving two stable oxygen isotopes. Coupled channels equations with an incoming wave boundary condition are employed, as is the no-recoil approximation; the adiabatic approximation, which violates unitarity, is avoided.
Pönisch, V., Koonin, S. E.
openaire   +3 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

Progress of Analytical Techniques and Application of Triple Oxygen Isotopes in Dissolved Oxygen

Journal of Isotopes
Oxygen is one of the essential elements in Earth's ecosystem，with stable isotopes including δ16O，δ17O，and δ18O. The composition of oxygen stable isotopes (δ17O，δ18O) exhibits different fractionation patterns in various biogeochemical reactions，making ...
Hongmin ZHENG, Xijie YIN, Haili YANG, Zijun WU   +3 more
doaj   +1 more source

Research on the Identification of Matheran Wine Region in the East Foot of Helan Mountain

Shipin gongye ke-ji
Objective: To explore the feasibility of using stable carbon and oxygen isotopes and mineral elements in small-scale regional wine production identification, the fractionation characteristics of stable isotopes of carbon and oxygen in wine of Matheran ...
Jianrong KAI, Haiyan MA, Wei ZHANG, Xiang CHEN, Caiyan WANG, Jing ZHANG, Caihong LI, Qian GE   +7 more
doaj   +1 more source

Datasets for spatial variation of O and H isotopes in waters and hair across South Korea

Data in Brief, 2020
The data presented here include the results of oxygen (δ18O) and hydrogen (δ2H) isotope analyses of water and human scalp hair samples collected from throughout the South Korea.
Mukesh Kumar Gautam, Byeong-Yeol Song, Woo-Jin Shin, Yeon-Sik Bong, Kwang-Sik Lee   +4 more
doaj   +1 more source

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