Relaxation methods temperature jump

A large programme utilizing temperature-jump relaxation methods for the study of tautomerism in aqueous solution has led the Dubois group to determine the kinetic and thermodynamic parameters of the equilibrium (130a) (130b) (78T2259). The tautomeric... 

DR. THOMAS The kinetic parameters of micelles are very well known, having been determined by temperature-jump relaxation methods and various other techniques. There are several kinetic events which can be described. First of all, the fastest event is the exchange of the counter ion (e.g., the sodium counter ion, in sodium lauryl sulfate). These ions exchange... 

Kao and Tsien studied the Ca +-binding kinetics of fura-2 and azo-1 by temperature-jump relaxation methods. In 140 mM KCl at 20°C, the respective association and dissociation rate constants for fura-2 were 6x10 M s and 97 s these kinetic properties were insensitive to hydrogen ion concentration over the pH range from 7.4 to 8.4. Azo-1 was studied in 140 mM KCl At 10°C, azo-... 

Table III. Activation Parameters for the Forward and Reverse Reactions of the Equilibrium HA + OH A + H 0 in O.IM Ionic Strength (Adjusted with NaCIO ) Aqueous Solution from Temperature Jump Relaxation Method Specific Rates Determined at 12 and 25° (Miles et ah )...

Activation parameters are more and more frequently being reported as important features of temperature jump relaxation method kinetic studies. This is true in spite of the fact that the restricted temperature range accessible to a Joule heating temperature jump apparatus and the usual 10% uncertainties in measured relaxation times are not favorable characteristics for achieving precise values of AH and AS. ... 

Cayley and Hague [70a] have employed the temperature-jump relaxation method to measure the rate of formation and dissociation of the 1 1 complex of magnesium(II) and 5-nitrosalicyclic acid (NSA) and also of the ternary complexes formed between this ligand and Mg(II) nitrilotriacetate (NTA), adenosine triphosphate (ATP) and polytriphosphate (TP) complexes, the last in an effort to gather information about the effect of bound ligands on the rate of substitution of a metal ion by a second type of group. It is expected that the presence of a bound ligand should... 

The rate constants 12 and 21 equilibrium can often be determined by the temperature-jump relaxation method . The method involves altering... 

Temperature-jump relaxation methods were used to study reactions of the type given in 1 where L is a chelate and M is a divalent metal ion. 

The principles and some of the experimental aspects of the temperature-jump relaxation method are discussed. 

ABSTRACT. Temperature-jump relaxation method has been employed... 

The temperature-jump relaxation method and other relaxation methods avoid mixing and therefore the limitation due to rate of mixing. Instead, the relaxation technique starts with a system at equilibrium and disturbs it by a sudden alteration of temperature or pressure. The discharge of a capacitor provides a short-duration pulse of electric current which gives a sudden increase in temperature. Detections of changes at some distance removed from the electrodes will not be complicated by the chemical... 

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