Results 11 to 20 of about 9,719 (242)

Annual variation in hydrogen and oxygen isotopes of river water in the Huashan watershed and sampling scheme optimization

open access: yesShui kexue jinzhan, 2023
The investigation on river water isotope characteristics of small watersheds and the sampling scheme are of great significance for a better understanding of the precipitation-runoff relationship, and for the establishment of an isotope hydrological ...
Aimin LIAO   +6 more
doaj   +1 more source

Isotopes of Carbon, Oxygen, and Hydrogen Ethanol in Fruit Wines [PDF]

open access: yesТехника и технология пищевых производств, 2020
Introduction. Like any other food product, alcoholic drinks are subject to falsification. The present research featured various methods of analysis that can be applied to control the quality and authenticity of wine production.
Oganesyants Lev A.   +3 more
doaj   +1 more source

Isotopic Fingerprinting: A Promising Tool for Coffee Authenticity Checks

open access: yesProceedings, 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

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

open access: yesFrontiers 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   +3 more
doaj   +1 more source

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

open access: yesData 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   +4 more
doaj   +1 more source

Adsorption separation of heavier isotope gases in subnanometer carbon pores

open access: yesNature 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   +15 more
doaj   +1 more source

Oxygen and Hydrogen Isotopes in Fruit and Vegetable Juices [PDF]

open access: yesPlant Physiology, 1983
(18)O/(16)O ratios from the juices of a number of fruits and vegetables were measured and found to be isotopically more enriched than the water in which they grew. Fast-growing high-water-content vegetables exhibited less enrichment than slower growing fruits such as apples, pears, and plums.
J, Dunbar, A T, Wilson
openaire   +2 more sources

Indication of hydrogen and oxygen stable isotopes on the characteristics and circulation patterns of medium-low temperature geothermal resources in the Guanzhong Basin, China

open access: yesJournal of Groundwater Science and Engineering, 2022
Guanzhong Basin is a typical medium-low temperature geothermal field mainly controlled by geo-pressure in the west of China. The characteristics of hydrogen and oxygen isotopes were used to analyze the flow and storage modes of geothermal resources in ...
Feng Ma   +3 more
doaj   +1 more source

Exploring the Deuterium Excess of Cretaceous Arctic Paleoprecipitation Using Stable Isotope Composition of Clay Minerals from the Prince Creek Formation (Maastrichtian) in Northern Alaska

open access: yesGeosciences, 2023
We report estimated stable isotope compositions of Artic paleoprecipitation using phyllosilicates sampled from three paleosols and two bentonites in the Prince Creek Formation (Maastrichtian) in northern Alaska.
Kate Andrzejewski   +4 more
doaj   +1 more source

Evaluation of oxygen isotopes and trace elements in planktonic foraminifera from the Mediterranean Sea as recorders of seawater oxygen isotopes and salinity [PDF]

open access: yesClimate of the Past, 2020
The Mediterranean Sea is characterized by a relatively strong west to east salinity gradient, which makes it an area suitable for testing the effect of salinity on foraminiferal shell geochemistry.
L. K. Dämmer   +5 more
doaj   +1 more source

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