Hydration pressure and phase transitions of phospholipids. I. Piezotropic approach.
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.
Pfeiffer
H
H
Departement Chemie, Katholieke Universiteit Leuven, Celestijnenlaan 200 D, B-3001 Leuven, Belgium. Helge.Pfeiffer@fys.kuleuven.ac.be
Binder
H
H
Klose
G
G
Heremans
K
K
D057927:Hydrophobic and Hydrophilic Interactions; D006874:Hydrostatic Pressure; D008433:Mathematics; D010713:Phosphatidylcholines / Q000737:chemistry; D010743:Phospholipids / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D013696:Temperature
D010713:Phosphatidylcholines; D010743:Phospholipids; C017251:1,2-oleoylphosphatidylcholine; C028694:1-palmitoyl-2-oleoylphosphatidylcholine