Hydration pressure and phase transitions of phospholipids. I. Piezotropic 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: | Dehydration reduces the main phase transition pressure of phospholipids. An analysis based on the Gibbs-Duhem equation shows how the shift of the transition pressure is correlated to the hydration pressure. By using Fourier transform infrared (FT-IR) spectroscopy we determined the hydration-dependent phase transition pressure. The application of our new approach gives hydration pressure values which agree with the values obtained with the osmotic stress method. |
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