J. Phys. II France
Volume 6, Numéro 11, November 1996
Page(s) 1537 - 1546
DOI: 10.1051/jp2:1996146
J. Phys. II France 6 (1996) 1537-1546

Stretched Exponential Kinetics of the Pressure Induced Hydration of Model Lipid Membranes. A Possible Scenario

Adam Gadomski

Technical University for Technology and Agriculture, Institute of Mathematics and Physics, Department of Physics II, Prof. Kaliskiego Street 7, 85796 Bydgoszcz, Poland

(Received 18 July 1995, revised 21 May 1996, accepted 12 August 1996)

The kinetics of the pressure induced hydration of model lipid membranes is studied in terms of the Avrami-Kolmogorov model and the fractal-like chemical reaction kinetics concept. As a general result, the stretched exponential relaxation function of the process is obtained and applied to an experimental case of the dioleoylphosphatidylethanolamine (DOPE)-bilayer hydration, understood as a cooperative process in which, both, the structural lipid changes and hydration are coupled in a complex way with each other, and hypothesized in terms of the anomalous random walk. The trends of both theory and experiment are in agreement.

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