Results 1 to 10 of about 13,316 (289)
H2 clumped isotope measurements at natural isotopic abundances. [PDF]
Rapid Commun Mass Spectrom, 2019 Rationale Molecular hydrogen (H 2 ) is an important gas for atmospheric chemistry, and an indirect greenhouse gas due to its reaction with OH.
Popa ME, Paul D, Janssen C, Röckmann T.
europepmc +7 more sources
AccuCor2: isotope natural abundance correction for dual-isotope tracer experiments [PDF]
Laboratory Investigation, 2021 Stable isotope labeling techniques have been widely applied in the field of metabolomics and proteomics. Before the measured mass spectrum data can be used for quantitative analysis, it must be accurately corrected for isotope natural abundance and tracer isotopic impurity.
Yujue Wang, Lance Parsons, Xiaoyang Su
openaire +4 more sources
Variations in lead isotopic abundances in Sprague-Dawley rat tissues: possible reason of formation. [PDF]
PLoS ONE, 2014 It has been reported in previous research that the lead isotopic composition of blood, urine and feces samples statistically differed from the given lead sources in Sprague-Dawley (SD) rats. However, the reason for this phenomenon is still unclear.
Duojian Liu +3 more
doaj +2 more sources
Martian differentiation history inferred from copper isotopes [PDF]
Nature CommunicationsSulfide segregation plays an important role in redistributing chalcophile elements during planetary differentiation, yet its efficiency on Mars remains poorly constrained.
De-Liang Wang +10 more
doaj +2 more sources
Isotopic ratios and fractionation in the local Universe [PDF]
EPJ Web of Conferences, 2022 The knowledge of isotopic abundances is important in galaxy evolution studies because isotopes provide diagnostics for the chemical enrichment in galaxies over time.
Viti Serena
doaj +1 more source
Direct D-atom Incorporation in Radicals: An Overlooked Pathway for Deuterium Fractionation
The Astrophysical Journal, 2023 Direct D-H exchange in radicals is investigated in a quasi-uniform flow employing chirped-pulse millimeter-wave spectroscopy. Inspired by the H-atom catalyzed isomerization of C _3 H _2 reported in our previous study, D-atom reactions with the propargyl (
Nureshan Dias +4 more
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The Astrophysical Journal, 2023 Anomalies in isotopic abundances of Mo and Ru in solar system matter were found to document variable contributions of the nucleosynthetic s -process component. We report isotopic relations of ϵ ^92 Mo versus ϵ ^100 Ru in meteorites from chondritic parent
Kurt Marti +2 more
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Presolar grain isotopic ratios as constraints to nuclear physics inputs for s-process calculations [PDF]
EPJ Web of Conferences, 2023 The isotopic abundances in presolar SiC grains of AGB origin provide important and precise constraints to those star nucleosynthesis models. By comparing the values of the s-element abundances resulting from calculations with the ones measured in these ...
Palmerini Sara +6 more
doaj +1 more source
Organic vs. conventional grassland management: do (15)N and (13)C isotopic signatures of hay and soil samples differ? [PDF]
PLoS ONE, 2013 Distinguishing organic and conventional products is a major issue of food security and authenticity. Previous studies successfully used stable isotopes to separate organic and conventional products, but up to now, this approach was not tested for organic
Valentin H Klaus +7 more
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The Astrophysical Journal Letters, 2023 GN-z11 is an unusually luminous high-redshift galaxy that was recently observed to have strong nitrogen lines while at the same time lacking traditional signatures of active galactic nucleus activity.
Chris Nagele, Hideyuki Umeda
doaj +1 more source