OBJECTIVES It was considered that lead isotope ratios did not change during physical, chemical, or biological processes. Thus, lead isotope ratios have been used as fingerprints to identify possible lead sources. However, recent evidence has shown that the lead isotope ratios among different biological samples in human are not always identical from its lead origins in vitro. An animal experimen...

Hydrogen isotope fractionation between hydrogen dichloride ion in the condensed phase and gaseous hydrogen chloride has been studied both theoretically and experimentally. Quite good agreement between the experimental tritium fractionation factor and that theoretically calculated for two sets of vibrational data was found. Theoretical calculations of the fractionation factors of both deuterium ...

Kinetic isotope effects in the gas phase reactions of OH and Cl with CH3Cl, CD3Cl, and CH3Cl A. A. Gola, B. D’Anna, K. L. Feilberg, S. R. Sellevåg, L. Bache-Andreassen, and C. J. Nielsen Department of Chemistry, University of Oslo, P.O.Box 1033 Blindern, N-0315 Oslo, Norway Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen, Denmark permanent address: De...

Hydrogen metabolism was studied in the anaerobic bacterium, Sporomusa sp. strain DMG 58, by measuring natural abundance levels of deuterium in H 2 , H 2 O, and individual fatty acids during acetogenic growth on H 2 / CO 2 . Four cultures were grown, each in medium with a distinct hydrogen-isotopic composition ( δ D-H 2 O). The δ D value of H 2 was quantified in the residual gas exiting the grow...

Introduction Conclusions References

Alteration of the Allende meteorite caused shifts in oxygen isotope ratios along a single mass fractionation line. If alteration was caused by aqueous fluid, the pattern of oxygen isotope fractionation can be explained only by flow of reactive water down a temperature gradient. Down-temperature flow of aqueous fluid within planetesimals is sufficient to explain the mineralogical and oxygen isot...

On the electron-induced isotope fractionation in low temperature ¡sup¿32¡/sup¿O¡sub¿2¡/sub¿/¡sup¿36¡/sup¿O¡sub¿2¡/sub¿ ices—ozone as a case study Journal Article How to cite: Sivaraman, B; Mebel, A. M.; Mason, N. J.; Babikov, D. and Kaiser, Ralf (2011). On the electroninduced isotope fractionation in low temperature 32O2/36O2 ices—ozone as a case study. Physical Chemistry Chemical Physics, 13(2...

Citation: Meyerink S, Ellwood MJ, Maher WA and Strzepek R (2017) Corrigendum: Iron Availability Influences Silicon Isotope Fractionation in Two Southern Ocean Diatoms (Proboscia inermis and Eucampia antarctica) and a Coastal Diatom (Thalassiosira pseudonana). Front. Mar. Sci. 4:280. doi: 10.3389/fmars.2017.00280 Corrigendum: Iron Availability Influences Silicon Isotope Fractionation in Two Sout...

The equilibrium iron isotope fractionation between lower mantle minerals and metallic iron at core-mantle boundary conditions can be evaluated from the high-pressure 57Fe partial vibrational density of states determined by synchrotron inelastic nuclear resonant x-ray scattering spectroscopy using a diamond anvil. Ferropericlase [(Mg,Fe)O] and (Fe,Mg)SiO3- post-perovskite are enriched in heavy i...

Cr stable isotope measurements can provide improved estimates of the extent of Cr(VI) reduction to less toxic Cr(III). The relationship between observed (53)Cr/(52)Cr ratio shifts and the extent of reduction can be calibrated by determining the isotopic fractionation factor for relevant reactions. Permeable reactive barriers (PRB) made of Fe(0) and in situ redox manipulation (ISRM) zones effect...