Results 31 to 40 of about 1,259,928 (152)

Sedimentary pyrite sulfur isotopes track the local dynamics of the Peruvian oxygen minimum zone

Nature Communications, 2021
To explore the importance of local vs. global sulfur-cycle controls on variations in pyrite sulfur isotopes, the authors couple carbon-nitrogen-sulfur concentrations and stable isotopes of sediments from the Peruvian oxygen minimum zone, identifying a ...
Virgil Pasquier, David A. Fike, Itay Halevy   +2 more
doaj   +1 more source

Oxygen Isotopes and Volatiles in Martian Meteorite [PDF]

, 2013
Oxygen isotopes were measured in mineral separates from martian meteorites using laser fluorination and were found to be remarkably uniform in both δ18O and Δ17O, suggesting that martian magmas did not assimilate aqueously altered crust regardless of any
Channon, Melanie Beth
core   +1 more source

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

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

Seasonally resolved growth of freshwater bivalves determined by oxygen and carbon isotope shell chemistry [PDF]

, 2010
By means of a monitoring experiment in two rivers in the Netherlands, we establish a relationship between seasonally resolved growth rates in unionid freshwater bivalves and their environment.
Dick Kroon, Kroon, Dick, Versteegh, E.A.A., Troelstra, S R, Ron J. G. Kaandorp, Vonhof, H B, Versteegh, Emma A. A., Simon R. Troelstra, Troelstra, Simon R., Kaandorp, R J G, Hubert B. Vonhof, Troelstra, S.R., Kroon, D., Vonhof, Hubert B., Vonhof, H.B., Kaandorp, Ron J. G., Kaandorp, R.J.G., Emma A. A. Versteegh, Kroon, D   +18 more
core   +2 more sources

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

Environmental controls on the stable isotopic composition of Mercenaria mercenaria: Potential application to paleoenvironmental studies [PDF]

, 2003
We have investigated the environmental controls of seasonally resolved records of oxygen and carbon isotopes of modern Mercenaria mercenaria bivalves collected live from five coastal sites along the east coast of North America.
Linsley, B. K., Howe, S. S., Elliot, M., deMenocal, P. B.   +3 more
core   +1 more source

Applications of stable water and carbon isotopes in watershed research: Weathering, carbon cycling, and water balances [PDF]

, 2011
Research on rivers has traditionally involved concentration and flux measurements to better understand weathering, transport and cycling of materials from land to ocean.
Petelet-Giraud, Emmanuelle, Philippe Négrel, Heiko Freitag, Schulte, Peter, Van Geldern, Robert, Jean-Luc Probst, Peter Schulte, Ajaz Karim, Kevin Telmer, Johannes A.C. Barth, Probst, Jean-Luc, Freitag, Heiko, Karim, Ajaz, Robert van Geldern, Anne Probst, Telmer, Kevin, Négrel, Philippe, Barth, Johannes A.C., Probst, Anne, Ján Veizer, Veizer, Jan, Emmanuelle Petelet-Giraud, Barth, J. A. C., Barth, Johannes A. C.   +23 more
core   +1 more source