Lithium isotope fractionation during uptake by gibbsite

Hydrogen isotope fractionation during H

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...

Experimental Evidence for Isotope Fractionation during Planetary

DIFFERENTIATION. A. Shahar K. Ziegler, E. D. Young, A. Ricolleau, C. A. Macris, E. A. Schauble and Y. Fei, Geophysical Laboratory, Carnegie Institution of Washington, 5251 Broad Branch Rd. NW, Washington D.C. 20015, [email protected], Institute of Geophysics and Space Physics, UCLA, 603 Charles Young Drive East, Los Angeles, CA, 90095, Department of Earth and Space Sciences, UCLA, 595 Charles You...

Boron isotope fractionation during brucite deposition

Boron isotope fractionation during brucite deposition from artificial seawater J. Xiao, Y. K. Xiao, C. Q. Liu, and Z. D. Jin State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an, 710075, China Qinghai Institute of Salk Lakes, Chinese Academy of Sciences, Xining, Qinghai, 810008, China State Key Laboratory of Environmental Geoch...

Isotope Effects, Isotope Separation and Isotope Fractionation

Carbon isotope fractionation by Emiliania huxleyi

The ratio of l*C : 13C was measured for Emiliania huxleyi cells grown under a range of irradiances in batch culture. Based on the assumption that HCO, was the carbon source, the maximum discrimination against 13C in the decalcified E. huxleyi cells was 24.6?& at 4.8 mol photons m-* d-l and the minimum discrimination was 17.9?& at 0.5 mol photons m-* d-l. In calcified cells, the range of 13C iso...