isotope exchange
The influence of oxygen isotope exchange between CO2 and H2O in natural CO2-rich spring waters : implications for geothermometry
... oxygen isotope exchange with CO 2 , high temperature equilibration with bedrock minerals and mineral dissolution and precipitation reactions on the CO 2 -rich water isotopic ...oxygen isotope ranges ...
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Iridium-catalyzed Csp3-H activation for mild and selective hydrogen isotope exchange
... Heys, J. R. Organoiridium Complexes for Hydrogen Isotope Ex- change Labeling. J. Labelled Compd. Radiopharm. 2007, 50, 770- 778. (c) Lockley, W. J. S. Hydrogen Isotope Labelling Using Iridi- um(I) Dionates. ...
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Iridium(I)-catalyzed Regioselective C-H Activation and Hydrogen Isotope Exchange of Non-aromatic Unsaturated Functionality
... Abstract: Isotopic labeling is a key technology of increasing importance for the investigation of new C-H activation and functionalization techniques, as well as in the construction of labeled molecules for use within ...
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Hydrogen water isotope exchange in a trickle bed column by process simulation and 3D computational fluid dynamics modelling
... isotopic exchange was carried out because the rate of kinetic model impacts the driving forces of concentrations and temperature that are responsible of mass transfer rates in the reactive stripping ...isotopic ...
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The development and use of novel iridium complexes as catalysts for ortho-directed hydrogen isotope exchange reactions
... As detailed here, this collaborative programme of work has revealed the considerable efficiency and general applicability of the specific group of novel iridium(I) complexes 4a-c within iridium-catalysed C-H activation ...
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Site-selective deuteration of N-heterocycles via iridium-catalyzed hydrogen isotope exchange
... hydrogen isotope exchange (HIE), via metal-catalyzed C − H activation, has been widely adopted as a key method for the synthesis of isotopically labeled compounds, allowing late-stage incorporation of ...
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Practically convenient and industrially-aligned methods for iridium-catalysed hydrogen isotope exchange processes
... hydrogen isotope exchange reaction with developing phosphine/NHC Ir(I) complexes has identified reaction media which are more widely applicable and industrially acceptable than the commonly employed ...
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The synthesis of highly active iridium(I) complexes and their application in catalytic hydrogen isotope exchange
... hydrogen isotope exchange processes. These complexes have allowed isotope incorporation over a range of substrates with the use of practically convenient deuterium and tritium ...of isotope ...
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Hydrogen isotope exchange with highly active iridium(I) NHC/phosphine complexes : a comparative counter-ion study
... hydrogen isotope exchange with an iridium(I) NHC/phosphine complex bearing the less coordinating tetrakis[3,5- bis(trifluoromethyl)phenyl]borate counterion, and compare these with labelling using the ...
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Soil solution phosphorus turnover: derivation, interpretation, and insights from a global compilation of isotope exchange kinetic studies
... The isotope exchange kinetic approach has also been successfully applied to study availability of Zn (Sinaj et ...radioisotopes. Isotope exchange kinetic studies with Zn, Cd, and Ni have used ...
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Photochemical and Dynamics Studies of Oxygen Isotope Exchange Reactions of CO2
... for isotope exchange. Opacity functions for the isotope exchange reaction showed a slight decrease in reaction probability at smaller impact parameters as the collision energy increased (see ...
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Triple oxygen isotope analysis of nitrate using isotope exchange cavity ringdown laser spectroscopy
... with OH - (aq) from the NaOH with unknown isotopic composition; (iii) water generated from the neutralization reaction and in which the oxygen also derives from OH - (aq), representing ~0.8% of the final solution; and ...
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C–H functionalization for hydrogen isotope exchange
... hydrogen isotope exchange requires a continually evolving preparative toolbox in order to satisfy the escalating regio-, chemo-, and stereoselectivity demands set by practicing isotope ...hydrogen ...
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Post mortem oxygen isotope exchange within cultured diatom silica
... Following these observations, it is clear that future methodological protocols should be adapted to circumvent potential oxygen isotope alteration during laboratory treatment. The obvious solution would be to find ...
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An assessment of cadmium availability in cadmium-contaminated soils using isotope exchange kinetics
... passed through a stainless steel sieve to obtain the ⬍2-mm McLaughlin et al. (2000). fraction before analysis. Soil pH was measured in a water Cadmium availability to plants and soil microorgan- suspension using a ...
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Anion effects to deliver enhanced iridium catalysts for hydrogen isotope exchange processes
... Although it is more common to tune the properties of such catalysts via manipulation of the coordinated ligands on the transition metal cation, the past two decades have witnessed a sign[r] ...
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The influence of water-rock reactions and O isotope exchange with CO2 on water stable isotope composition of CO2 springs in SE Australia
... oxygen isotope composition away from the Local Meteoric Water Line (LMWL) in mineral spring waters from natural settings characterised by large amounts of CO 2 ...
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Carbonic anhydrase in the adult mosquito midgut
... We have previously observed a correlation between Hansson’s histochemical method and the 18 O isotope exchange method in the localization of CA in larval Ae. aegypti, Cx. quinquefasciatus, Cx. nigripalpus, ...
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Stratospheric Air Sub-sampler (SAS) and its application to analysis of 17 O(CO 2) from small air samples collected with an AirCore
... complete isotope analysis (including 1 17 O) of stratospheric CO 2 ...oxygen isotope exchange unit and (d) isotope detection unit including open split interface and isotope ratio mass ...
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Studies on the mechanism of action of arginine kinase
... II TABLE OF CONTENTS Page INTRODUCTION The development of enzyme kinetics 2 The kinetic study of bireactant enzymes 5 Isotope exchange studies Use of physical and chemical methods in 11 [r] ...
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