Solution Thermodynamics and Its Application to Aqueous Solutions

Dr. Koga's group introduced a new approach to the thermodynamic studies of aqueous solutions. They devised methods of measuring various thermodynamic quantities differentially. These methods allow them to experimentally evaluate the intermolecular interaction, the key quantity in the so-called "many-body problem.” The group has started applying this new methodology to aqueous solutions of biopolymers. As a recognition of his contribution to solution thermodynamics, he was awarded the Society Award by The Japan Society of Calorimetry and Thermal Analysis in 2006. In 2011, he obtained for the first time in the world a fourth derivative of Gibbs energy and named it "Acceleration of the effect of solute on entropy-volume cross fluctuation density."

Part A: A Differential Approach in Solution ThermodynamicsI: Basics of Thermodynamics - Derivatives of Gibbs Energy, GII: Solution Thermodynamics - Use of the Second and Third Derivatives of GIII: Determination of the Second and Third Derivatives of GIV: Fluctuation and Partial Molar Fluctuation - Understanding H2O

Part B: Studies of Aqueous Solutions Using the Second, the Third, and the Fourth Derivatives of GV: Mixing Schemes in Aqueous Mono-olsVI: Mixing Schemes in Aqueous Solutions of NonelectrolytesVII: Effects of Nonelectrolytes on the Molecular Organization of H2O - 1-Propanol (1P) Probing MethodologyVIII: Effects of Ions on the Molecular Organization of H2O - 1-Propanol (1P)-Probing MethodologyIX: Interactions in Ternary Aqueous Solutions - General TreatmentX: Differential Approach Applied to Spectroscopic Studies on Aqueous SolutionsXI: The Koga Line - Boundary Between Environmentally Friendly and Hostile Water and Aqueous SolutionsXII: In Closing - Executive Summary of the Effect of Solute on H2O