Hydration pressure and phase transitions of phospholipids. II. Thermotropic approach |
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Authors: | Pfeiffer H Binder H Klose G Heremans K |
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Institution: | Departement Chemie, Katholieke Universiteit Leuven, Celestijnenlaan 200 D, B-3001 Leuven, Belgium. Helge.Pfeiffer@fys.kuleuven.ac.be |
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Abstract: | It is widely known that dehydration increases the main phase transition temperature of phospholipids. A mathematical analysis now shows that hydration pressure can be calculated by the dehydration-induced shift of the phase transition temperature. The hydration-dependent piezotropic and thermotropic phase transitions were determined by using calorimetry and FT-IR spectroscopy, and the application of our approach gives hydration pressure parameters that agree very well with the values obtained with the osmotic stress method. |
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