isotope effects
Deuterium Isotope Effects on Permeation and Gating of Proton Channels in Rat Alveolar Epithelium
... Are H 1 channels really ion channels? In Table IV deute- rium isotope effects on various membrane transporters other than channels are listed. The precise values de- pend strongly on the conditions of the ...
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Isotope effects of plasma chemical carbon oxidation in a magnetic field
... the isotope redistribution between the gaseous and condensed phases in the atomic carbon oxi- dation occurring in low-temperature gas-discharge plasma in an external magnetic ...the isotope effects ...
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Isotope Effects in Chemical Processes of Atmospheric Interest
... slope of wavelength-dependent fractionation decrease in the high-energy region. This result is different from that obtained by the empirical ZPE model [Yung and Miller, 1997], which predicts a straight line, because the ...
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ON THE QUANTUM THEORY OF ISOTOPE EFFECTS IN ELECTROMIGRATION AND THERMOMIGRATION OF LIGHT INTERSTITIALS
... In fcc lattices the important values of x, will be de- termined partly by the self trapping distortions and partly by the dependence of the transition matrix e[r] ...
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The effect of trophic level on individual amino acid δ15N values in a terrestrial ruminant food web
... nitrogen isotope fractionations between different classes of organisms discussed above are believed to be due to differences in the meta- bolic pathways of these AAs (see O’Connell ...kinetic isotope ...
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A method for stable carbon isotope ratio and concentration measurements of ambient aromatic hydrocarbons
... carbon isotope ratios would require that any loss in the TSPS would be highly reproducible, which is unlikely, and the tests of the TSPS showed no indication for significant loss of n-alkanes in the ...in ...
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THE RHETORIC OF REFUGEES: LITERACY, NARRATIVE AND IDENTITY FOR SOMALI WOMEN
... Evidence for these three roles of histidine residues in CHO are derived from the pH effects, primary and solvent kinetic isotope effects, site-directed mutagenesis, UV-visible absorbance[r] ...
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The elimination-addition mechanism of nucleophilic aromatic substitution
... .The isotope effects in question are calculated from the percent reaction and the deuterium content of recovered halobenzene relative to that of the starting material..[r] ...
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Modeling oceanic nitrate and nitrite concentrations and isotopes using a 3 D inverse N cycle model
... of isotope effects for denitrification and NO − 2 oxi- dation, and we find that the larger (more negative) inverse isotope effects for NO − 2 oxidation, along with relatively high rates of NO ...
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Structural Properties and Isotopic Abundance Ratio Analysis of Magnesium Gluconate Treated with the Energy of Consciousness Using LC-MS and NMR Spectroscopy
... The alteration in the isotopic abundance ratios of 13 C/ 12 C for C-O; 2 H/ 1 H for C-H and O-H bonds; 17 O/ 16 O and 18 O/ 16 O for C-O bond; 25 Mg/ 24 Mg, 26 Mg/ 24 Mg, 17 O/ 16 O and 18 O/ 16 O for Mg-O bond have the ...
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Carbonate Clumped Isotope Thermometry: Applications to Carbonaceous Chondrites and Effects of Kinetic Isotope Fractionation
... Previous attempts (e.g., Bottcher 1996 and Gilg et al., 2003) to understand the variations of acid digestion fractionation among different carbonate minerals examined empirical correlations between the intercept in a ...
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Solution photochemistry of the uranyl ion
... TABLE 4 Deuterium Kinetic Isotope Effects on the Quenching of Excited Uranyl Ions by Alcohol Molecules in Aqueous Solution at 293K... iv The assumption that the 575 nm transient is the l[r] ...
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Effects of tissue preservation on carbon and nitrogen stable isotope signatures in syngnathid fishes and prey
... the effects of preservation methods and lipid normalization in fish tissues [27, 29, ...those effects but to provide practical mathematical models for the conversion of isotopic signals in live prey and ...
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EQUATIONS FOR TRACER EXPERIMENTS
... The second basic assumption is that in systems of constant volume the rate of flow of isotope out of a compartment is proportional to the amount of labeled isotope present in the compart[r] ...
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Physiological and environmental controls on the nitrogen and oxygen isotope fractionation of nitrate during its assimilation by marine phytoplankton
... enzymatic isotope effect of ...an isotope effect less than the published value of ...The isotope effect for nitrate reductase is not expected to vary among forms of the enzyme, among species, or with ...
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Isotope hydrological studies of the perennial ice deposit of Saarhalle, Mammuth¨ohle, Dachstein Mts, Austria
... stable isotope composition does not support the hypothesis that ice layers with low conductivity are formed by freezing out of water ...vapour. Isotope fractionation effects during the freezing ...
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Deuterium isotope rate effects in the spontaneous and magnesium-ion-catalyzed decarboxylation of oxalacetic acid.
... (or pD) value is the pK for the keto-enol chelate equilibrium. The ratio of the observed first order rate constants at the isokinetic point of k R ^ g / k ^ o = 1 - 1 indicates a secondary isotope rate effect. The ...
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Continental carbonate facies of a Neoproterozoic panglaciation, north east Svalbard
... Carbon and oxygen stable isotope data are presented here as δ13C and δ18O in parts per... and other isotope analyses will be presented elsewhere..[r] ...
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δ18O and δ13C isotope investigation of the Late Glacial and early Holocene biogenic carbonates from the Lake Lednica sediments, western Poland
... The palaeoenvironment and palaeoclimate of the Lake Lednica area have been investigated in several pre- vious studies. The geochemical composition of the lake sediments was described by Mazurek (1987, 1988). Mazurek ...
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Changes in mean-squared charge radii and magnetic moments of Tl 179-184 measured by in-source laser spectroscopy
... The region of the neutron-deficient isotopes near the proton shell closure at Z = 82 has drawn considerable interest as it exhibits a clear manifestation of shape coexistence in nuclei ([1,2]; recent work has been ...
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