The isotopically substituted nitrous oxide species 14N14NO, 15N14NO, 14N15NO and 15N15NO were investigated by ultra-violet (UV) absorption spectroscopy. High precision cross sections were obtained for the wavelength range 181 to 218 nm at temperatures of 233 and 283 K. These data are used to calculate photolytic isotopic fractionation constants as a function of wavelength. The fractionation con...

Samples produced in piston cylinder experiments were used to document the thermal isotopic fractionation of all the major elements of basalt except for aluminum and the fractionation of iron isotopes by chemical diffusion between a natural basalt and rhyolite. The thermal isotopic fractionations are summarized in terms of a parameter Xi defined as the fractionation in per mil per 100 C per atom...

Heparin was isolated from whole clam tissue Marcia opima . Purification of multimilligram quantities of heparin from this tissue sample permitted a thorough examination of its anticoagulant activity characterization, which was partially purified by fractionation by anion exchange chromatography using DEAE cellulose column. The isolated crude and partially purified fractionated sample showed me...

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...

Introduction: Composition of chondrites on Fe-MgMn diagram show distinct patterns that result from nebular processes like volatility-controlled Mn-Mg fractionation, metal/silicate fractionation under reducing conditions and subsequent oxidation leading to variations in FeO/MgO ratio [1]. As chondrules are the major constituent of chondrites (except CI) their effect on bulk chemical compositions...

Previous studies have shown that the 2.04 Ga Kangâmiut dyke swarm of SW Greenland was injected into an active tectonic environment associated with the formation of the Nagssugtoqidian orogenic belt. Major and trace element modelling of the swarm shows that its chemical evolution was controlled by simple clinopyroxene–plagioclase fractionation. However, such trends — although typical of continen...