Isotope fractionation
Precise and accurate isotope fractionation factors (α17O, α18O and αD) for water and CaSO4·2H2O (gypsum)
... the fractionation factor that is calculated as the isotopic difference between the sequential samples of the mother water and ...the isotope fractionation ...
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Nitrogen isotope fractionation in protoplanetary disks
... Bigger changes in the column density ratios are seen when changing the grain size distribution, as already noted by Heays et al. (2014). Decreasing the fraction of large grains from 90% to 10% leads to an increase in ...
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Extreme magnesium isotope fractionation at outcrop scale records the mechanism and rate at which reaction fronts advance
... can be explained at isobaric, isothermal conditions by continuously varying the chemical potential of MgO and CaO (at T = 430 °C and P = 1.2 GPa) and therefore the individual reaction zones (or each point across the zone ...
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Thallium elemental behavior and stable isotope fractionation during magmatic processes
... and isotope variations in the Ilimaussaq peralkaline intrusive complex in ...Tl isotope data, thus their data have relevance when considering effects of equilibrium inter-mineral isotope ...
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Stable oxygen and hydrogen isotope fractionation factors for the Goethite (hematite)-water system
... oxygen isotope fractionation factors calculated from the - T relations given by various researchers ranged from -8 to 2 for goethite ( at 70 ºC) and ...
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Investigation of tubular handling of bicarbonate in man A new approach utilizing stable carbon isotope fractionation
... acetazolamide administration and consequent inhibition of carbonic anhydrase in the proximal tubule. Although it is possible that in the latter case high HCO-3 generates the CO2 (ampholyte effect), the isotope ...
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Zn isotope fractionation in a pristine larch forest on permafrost-dominated soils in Central Siberia
... stable isotope methods have been widely employed to characterize Zn transport mechanisms and sources within continental or marine environments [20-41] com- prising field studies, in vitro experiments on plants, ...
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Iron and zinc isotope fractionation during uptake and translocation in rice (Oryza sativa) grown in oxic and anoxic soils
... Stable isotope fractionation is emerging quickly as a powerful novel technique to study metal uptake and translocation in ...to isotope fractionation under differing environmental ...Fe ...
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Towards an understanding of thallium isotope fractionation during adsorption to manganese oxides
... Oxidative scavenging of thallium by birnessite: Controls on thallium sorption and stable isotope fractionation in marine ferromanganese precipitates.. Assessing the utility of thallium a[r] ...
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Absence of molybdenum isotope fractionation during magmatic differentiation at Hekla volcano, Iceland
... samples have identical Mo isotopic compositions with an average d 98 Mo of 0.15 ± 0.05& (2 s.d.; n = 23). There is therefore no resolvable Mo isotope fractionation during magmatic differentiation at ...
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Redox-controlled mechanisms of C and H isotope fractionation between silicate melt and COH fluid in the Earth’s interior
... stable isotope behavior such as those of hydrogen and carbon to deduce processes of formation and evolution of the Earth’s interior, experi- mental data are ...the isotope fractionation while the ...
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Maternal - Fetal Interaction: An Insight through the Stable Isotope Fractionation Prism
... Stable isotope composition of consumers resembles the isotopic composition of consuming food (DeNiro, Epstein, 1978, ...stable isotope composition in maternal and fetal organs of mice at the last term of ...
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Sulfur Isotope Fractionation as an Indicator of Biogeochemical Processes in an AMD Passive Bioremediation System
... sulfur isotope fractionations observed in nature ...sulfur isotope patterns can become an essential tool to help understand, predict, prevent and mitigate SO 42 − contamination in ...
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Physiological and environmental controls on the nitrogen and oxygen isotope fractionation of nitrate during its assimilation by marine phytoplankton
... the isotope effect for carbon assimilation decreases in magnitude and varies less with growth rate under light limitation versus nutrient limitation (Burkhardt et ...
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Metabolic Stable Isotope Fractionation: Biogeochemical Approaches to Diagnosing Sickle Cell and Thalassemia Anemia in the Archaeological Record
... of fractionation over a significant enough time period (~seven years) (Larsen 1997; Schweissing and Grupe 2003; White and Folkens 2005) (see Chapter 2), and induce enough of a fractionation effect, to not ...
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Validation of carbon isotope fractionation in algal lipids as a pCO2 proxy using a natural CO2 seep (Shikine Island, Japan)
... isotopic fractionation on algal lipids where environmental conditions are at natu- rally balanced levels with the exception of the large gradient of CO 2 ...
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Isotope fractionation factors controlling isotopocule signatures of soil-emitted N2O produced by denitrification processes of various rates
... determined isotope effects represent the overall isotope effects, resulting from both physical and enzymatic fractionation, and are called the Net Isotope Effects (NIE), denoted by ...
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Boron isotope fractionation during brucite deposition from artificial seawater
... isotopic fractionation of brucite. The isotopic fractionation behaviors and mech- anisms of boron incorporated into brucite are different from those into ...
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Carbonate Clumped Isotope Thermometry: Applications to Carbonaceous Chondrites and Effects of Kinetic Isotope Fractionation
... Overall, our estimated alteration temperatures for GRO 95577, Orgueil and Tagish Lake, are within or below those estimated for CM chondrites (20 to 71˚C, also based on carbonate clumped isotope thermometry; Guo ...
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13C/12C Isotope Fractionation during Aerobic and Anaerobic Biodegradation of Naphthalene
... absolute isotope abundances with a precision that is sufficient to detect small variations in isotope ...known isotope ratio, related to international standards, can be done with sufficient pre- ...
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