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Analysis of Cooperativity by Isothermal Titration Calorimetry
Int. J. Mol. Sci. 2009, 10(12), 5296-5325; doi:10.3390/ijms10125296
Article

On the Physical Meaning of the Isothermal Titration Calorimetry Measurements in Calorimeters with Full Cells

1
 and 2,*
1 Laboratoire de Thermodynamique des Solutions et des Polymères Université Blaise Pascal, 24, Avenue des Landais, Clermont Ferrand, 63177 Aubière Cedex, France 2 Research and Development Branch on Flow Assurance, Mexican Institute of Petroleum, Eje Central Lazaro Cardenas 152, Col. San Bartolo Atepehuacan, Mexico City 07730, Mexico
* Author to whom correspondence should be addressed.
Received: 7 October 2009 / Revised: 6 November 2009 / Accepted: 8 December 2009 / Published: 9 December 2009
(This article belongs to the Special Issue Isothermal Titration Calorimetry)
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Abstract

We have performed a detailed study of the thermodynamics of the titration Process in an isothermal titration calorimeter with full cells. We show that the relationship between the enthalpy and the heat measured is better described in terms of the equation ΔH = Winj + Q (where Winj is the work necessary to carry out the titration) than in terms of ΔH = Q. Moreover, we show that the heat of interaction between two components is related to the partial enthalpy of interaction at infinite dilution of the titrant component, as well as to its partial volume of interaction at infinite dilution.
Keywords: isothermal titration calorimetry; ITC; calorimetry; thermodynamics; infinite dilution; binding; partial properties; enthalpy; heat isothermal titration calorimetry; ITC; calorimetry; thermodynamics; infinite dilution; binding; partial properties; enthalpy; heat
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Grolier, J.-P.E.; Del Río, J.M. On the Physical Meaning of the Isothermal Titration Calorimetry Measurements in Calorimeters with Full Cells. Int. J. Mol. Sci. 2009, 10, 5296-5325.

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