Results 41 to 50 of about 25,009 (294)

Periodicity in the isotope chemistry of hydrogen [PDF]

open access: yesProceedings of the National Academy of Sciences, 1981
Periodicities and regularities are established among the deuterium to protium isotopic reduced partition function ratios, ln( s / s ′) f , of 39 diatomic and 19 polyatomic hydrides. It is shown that ln(
openaire   +2 more sources

Oxygen and hydrogen isotopes measured on water bottle samples during KNORR cruise KNR199-4 [PDF]

open access: yes, 2015
Oxygen and hydrogen isotopes measured on water bottle samples during KNORR cruise KNR199-
Waniek, Joanna J   +13 more
core   +1 more source

A consistent molecular hydrogen isotope chemistry scheme based on an independent bond approximation [PDF]

open access: yes, 2009
The isotopic composition of molecular hydrogen (H<sub>2</sub>) produced by photochemical oxidation of methane (CH<sub>4</sub>) and Volatile Organic Compounds (VOCs) is a key quantity in the global isotope budget of (H<sub>2 ...
Sub Atmospheric physics and chemistry   +8 more
core   +1 more source

Low-frequency orbital variations controlled climatic and environmental cycles, amplitudes, and trends in northeast Africa during the Plio-Pleistocene

open access: yesCommunications Earth & Environment, 2023
The eastern Mediterranean sapropels, paced by insolation, provide a unique archive of African monsoon strength over the Late Neogene. However, the longer-term climate of this region lacks characterization within the context of changes in ice volume, sea ...
Rachel Lupien   +6 more
doaj   +1 more source

Hydrogen in Nominally Anhydrous Crustal Minerals [PDF]

open access: yes, 2003
Systematic infrared and nuclear magnetic resonance investigations of common crustal minerals were undertaken to better understand the geologic significance of minor components of structural hydrous species within these nominally anhydrous minerals ...
Johnson, Elizabeth Ann
core   +1 more source

Building Mexican isoscapes: Oxygen and hydrogen isotope data of meteoric water sampled across Mexico

open access: yesData in Brief, 2021
Oxygen and hydrogen isotope data of meteoric water samples are compiled from several States across Mexico. This dataset includes 287 oxygen and hydrogen (and deuterium excess) isotope data corresponding to meteoric water collected from the surface ...
Diana K. Moreiras Reynaga   +5 more
doaj   +1 more source

Appendix A. Tables showing alphabetical lists of bat species (with varying feeding habits) captured at La Selva Biological Station, Costa Rica, with corresponding ratios of non-exchangeable hydrogen stable isotopes in fur keratin and of hydrogen stable isotopes in body water from field season A, and corresponding ratios of non-exchangeable hydrogen stable isotopes and nitrogen isotopes in hair keratin from field season B. [PDF]

open access: yes, 2016
Tables showing alphabetical lists of bat species (with varying feeding habits) captured at La Selva Biological Station, Costa Rica, with corresponding ratios of non-exchangeable hydrogen stable isotopes in fur keratin and of hydrogen stable isotopes in ...
Christian C. Voigt (103380)   +2 more
core   +1 more source

Sudden anaerobization in Amphibacillus xylanus increases intracellular labile ferrous iron and inhibits cell growth

open access: yesFEBS Open Bio, EarlyView.
Abruptly changing from aerobic to anaerobic conditions (sudden anaerobization) induced growth inhibition and a significant increase in intracellular labile ferrous iron in the aerotolerant anaerobe Amphibacillus xylanus. We found that free flavins mediate efficient electron transfer from NADH to ferric iron under anaerobic conditions, suggesting that ...
Shinya Kimata   +13 more
wiley   +1 more source

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

open access: yes, 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   +23 more
core   +1 more source

Cyclic azapeptide CD36 ligand attenuates cardiac injury and reduces long‐chain fatty acid accumulation after myocardial ischemia–reperfusion in mice

open access: yesFEBS Open Bio, EarlyView.
In a murine model of myocardial ischemia and reperfusion (MI/R), the CD36 azapeptide ligand MPE‐298 reduces cardiac injury and transiently lowers left ventricular long‐chain fatty acids (LCFAs) accumulation 3 h after reperfusion, accompanied by a decrease of oxidative stress and inflammation‐associated genes' expression in the heart and adipose tissue.
Jade Gauvin   +12 more
wiley   +1 more source

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