Exchange studies

Structure. The thiosulfate sulfur atoms have been shown to be nonequivalent by radioactive sulfur exchange studies (1). When a sulfite is treated with radioactive sulfur and the resulting thiosulfate decomposed to sulfur and sulfite by acids, the radioactivity appears in the sulfur ... 

Much information on proton transfers has been obtained by NMR chemical exchange studies. An example is the proton exchange between neopentyl alcohol and acetic acid in acetic acid as the solvent. The reaction is... 

Cations (12), (13), and (14) represent the three ways in which proton may add to pyrrole. Twenty-five years ago, Koizumi and Titani earned out a series of deuterium exchange studies and... 

M Qureshi et al., Recent progress in ion-exchange studies on insoluble salts of polybasic metals Separation Sci. 1972, 7, 615... 

Iwamoto T (2004) Forefront of Na+/Ca2+ exchanger studies molecular pharmacology of Na+/Ca2+ exchange inhibitors. J Pharmacol Sci 96 27-32... 

Ion-exchange studies of complex formation. Y. Marcus, Ion Exch. Solvent Extr., 1966, 1, 101-138 (63). 

Pj release occurs at a relatively apparent slow rate (kobs = 0.005 s" ), so that the transient intermediate F-ADP-Pj in which P is non-covalently bound, has a life time of 2-3 minutes (Carlier and Pantaloni, 1986 Carlier, 1987). While the y-phosphate cleavage step is irreversible as assessed by 0 exchange studies (Carlier et al., 1987), the release of Pi is reversible. Binding of H2PO4 (Kp 10 M) causes the stabilization of actin filaments and the rate of filament growth varies linearly with the concentration of actin monomer in the presence of Pi (Carlier and Pantaloni, 1988). Therefore, Pi release appears as the elementary step responsible for the destabilization of actin-actin interactions in the filament. 

Knorr, W. and Heimann, M. (1995). Impact of drought stress and other factors on seasonal land biosphere CO2 exchange studied through an atmospheric tracer transport model, Tellus, Ser. B, 47, 471-489. 

In our laboratory we have been investigating the mechanism of action of mandelic acid racemase from Pseudomonas putida (101), which catalyzes the racemization of either D or L-mandelic acid, 47. Evidence from kinetic and isotopic exchange studies indicates that the racemization proceeds via an... 

Intervalence Charge Transfer Emd Electron Exchange Studies of Dinuclear Ruthenium Complexes Robert J. Crutchley... 

Holroyd, A. Salmon, J. E. (1956). Ion-exchange studies of phosphates. Part I. Ion-exchange and pH-titration for detection of complex formation. Journal of the Chemical Society 269-72. 

The reported in situ NMR of combustion [2] served largely as proof of concept work. It was demonstrated that despite the presence of paramagnetic oxygen and radicals, the xenon relaxation times are sufficiently long for gas exchange studies. 

Ciba-Geigy Ltd. 1983b. Sister chromatid exchange studies on somatic cells of Chinese hamsters TK 12 477 (REOLUBE HYD46). Test No. 830211. Ciba-Geigy Limited, Basle, Switzerland. 

Cis-trans isomerization occurs either by formation of a half-hydrogenated state (Horiuti-Polanyi mechanism) followed by rotation around the newly formed single bond and abstraction of an appropriate hydrogen onto the surface or by double bond migration (either Horiuti-Polanyi or Jt-allyl) from a cis (trans) position to an adjacent trans (cis) position (deuterium exchange studies favor the rotation mechanism). 

To test this result, we extended our initial water exchange study on [Be(H20)4]2+ to the exchange of CH3OH at [Be(CH3OH)4]2+... 

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