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Osmotic Shrinkage of Giant Egg-Lecithin Vesicles

  • M. Elwenspoek
  • E. Boroske
  • W. Helfrich
Conference paper
Part of the Springer Series in Chemical Physics book series (CHEMICAL, volume 11)

Abstract

Osmotic shrinkage of giant egg-lecithin vesicles was observed by phase-contrast microscopy. The vesicles remained or became spherical when shrinking. Small and thick-walled vesicles formed visible fingers attached to the sphere. The water permeability of the single bilayer was found to be 41 μm/s. A variety of observations indicate that osmosis induces a parallel lipid flow between the monolayers of the bilayer, leading to a strong positive spontaneous curvature. They also suggest the formation of mostly submicroscopic daughter vesicles. The estimated coupling constant, 2. 10–6 mole/mole, is large enough to be biologically significant.

Keywords

Liquid Crystal Water Permeability Spontaneous Curvature Daughter Vesicle Biophysical Journal 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Copyright information

© Springer-Verlag Berlin Heidelberg 1980

Authors and Affiliations

  • M. Elwenspoek
    • 1
  • E. Boroske
    • 1
  • W. Helfrich
    • 2
  1. 1.Institut für Atom- und FestkörperphysikFreie Universität BerlinBerlin 33Germany
  2. 2.Institut für Theorie der Kondensierten MaterieFreie Universität BerlinBerlin 33Germany

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