Biosynthetic isotope fractionation negligibly impacts biomarker 14C ages

Isotope Effects, Isotope Separation and Isotope Fractionation

Variation in oxygen isotope fractionation during cellulose synthesis: intramolecular and biosynthetic effects.

The oxygen isotopic composition of plant cellulose is commonly used for the interpretations of climate, ecophysiology and dendrochronology in both modern and palaeoenvironments. Further applications of this analytical tool depends on our in-depth knowledge of the isotopic fractionations associated with the biochemical pathways leading to cellulose. Here, we test two important assumptions regard...

Wavelength dependence of isotope fractionation

Wavelength dependence of isotope fractionation in N2O photolysis J. Kaiser, T. Röckmann, C. A. M. Brenninkmeijer, and P. J. Crutzen 3 Abteilung Chemie der Atmosphäre, Max-Planck-Institut für Chemie, Mainz, Germany Bereich Atmosphärenphysik, Max-Planck-Institut für Kernphysik, Heidelberg, Germany Center for Atmospheric Sciences, Scripps Institution of Oceanography, University of California, San ...

Silver Isotope Fractionation in Chondrites

I n t r o d u c t i o n : The study of Ag isotopic compositions is of particular interest because of the extinct radionuclide Pd, which decays to Ag with a half-life of 6.5 Myrs. This chronometer has been successfully applied to unravel formation and differentiation processes of iron meteorites [1-3]. Compared to the early measurements by TIMS, the use of multi-collector inductively coupled pla...

Isotope fractionation in atmospheric chloromethane

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...