Author
M. Barres
Bio: M. Barres is an academic researcher from University of Provence. The author has contributed to research in topics: Inverse filter. The author has an hindex of 3, co-authored 3 publications receiving 45 citations.
Topics: Inverse filter
Papers
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TL;DR: In this article, the authors reported first results concerning the simultaneous determination of equilibrium constants and enthalpies of reaction by titration conduction microcalorimetry, and described an electronic on-line corrector.
20 citations
TL;DR: In this paper, a recent development of an electronic inverse filter for conduction microcalorimetry is described, and improvements concern the versatility and simplification of the instrumentation.
17 citations
TL;DR: In this article, an injection apparatus attached to the two elements of a conduction microcalorimeter allows measurement of the thermal change arising from displacement of the equilibria in the liquid phase.
8 citations
Cited by
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TL;DR: Methods for quantitative comparison of the capabilities of calorimeters for simultaneous determination of equilibrium constants and enthalpy changes, for determining optimal experimental conditions, and for assessing the effects of systematic and random errors on the accuracy and precision of equilibrium variables determined by this method are reported.
75 citations
TL;DR: Computer simulations show that the dynamic range for determination of equilibrium constants can be increased by three orders of magnitude compared to that of classical ITC, making it possible to determine high affinities.
42 citations
TL;DR: In this article, the authors report the thermodynamic parameters for the protonation of a homologous series of linear dicarboxylates having the molecular formula, HOOC-(CH 2 ) n -COOH, with n = 0 - 7 (n = 0 oxalate; n = 1 malonate, n = 2 succinate; N = 3 glutarate; N.
Abstract: In this work we report the thermodynamic parameters for the protonation of a homologous series of linear dicarboxylates having the molecular formula, HOOC-(CH 2 ) n -COOH, with n = 0 - 7 (n = 0 oxalate; n = 1 malonate; n = 2 succinate; n = 3 glutarate; n = 4 adipate; n = 5 pimelate; n = 6 suberate; n = 7 azelate). The investigation was performed by potentiometry (H + -glass-electrode) at 25°C in different ionic media and different ionic strengths (NaCI: 0 ≤ / [mol-L -1 l ≤ 4.9; Et 4 NI: 0 ≤ I (mol-L -1 ] ≤ 1). General equations for the dependence on ionic strength of the thermodynamic parameters were used, and the relative parameters are reported. The influence of the length of the alkyl chain on protonation constants and on their dependence on ionic strength is discussed. Some recommended values of protonation constants are reported by considering present results and literature ones.
30 citations
TL;DR: In this article, a mass action model of association based on the Guggenheim equations for the activity coefficients for mixed electrolytes was used to determine the apparent molar enthalpies of phenothiazine drugs.
Abstract: Apparent molar enthalpies have been determined as a function of concentration by heat conduction calorimetry for aqueous solutions of the phenothiazine drugs chlorpromazine hydrochloride, promethazine hydrochloride, and promazine hydrochloride in the presence of added electrolyte (0.025−0.10 mol dm-3 NaCl). The concentration dependence of the apparent molar enthalpy could be quantitatively described using a mass action model of association based on the Guggenheim equations for the activity coefficients for mixed electrolytes. Derived values of the monomer−counterion interaction coefficient became increasingly negative with increase of salt concentration, suggesting that electrolyte addition promoted association at concentrations below the critical micelle concentration (cmc). Calculations of the fraction of each drug in the form of micelles as a function of concentration further confirmed the tendency for premicellar association. Significant differences in properties were observed between promethazine and...
29 citations
TL;DR: The results of the application of the numerical and electronic inverse filtering to the same calorimetric output are presented in this paper, where two techniques, used to reduce the inertia of conduction calorimeters, give very similar results.
27 citations