Phospholipid surface bilayers at the air-water interface. II. Water permeability of dimyristoylphosphatidylcholine surface bilayers

Dispersions of dimyristoylphosphatidylcholine (DMPC) in water have been reported to form a structure at 29 degrees C at the equilibrium air/water surface with a molecular density equal to that of a typical bilayer. In this study, the water permeability of this structure has been evaluated by measuri...

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Bibliographic Details
Published in:Biophysical journal 1985-02, Vol.47 (2), p.211-215
Main Authors: Ginsberg, L., Gershfeld, N.L.
Format: Article
Language:English
Subjects:
Air
Artificial membranes and reconstituted systems
Biological and medical sciences
Biophysical Phenomena
Biophysics
Dimyristoylphosphatidylcholine
Fundamental and applied biological sciences. Psychology
Lipid Bilayers
Membrane physicochemistry
Models, Theoretical
Molecular biophysics
Permeability
Water
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Summary:Dispersions of dimyristoylphosphatidylcholine (DMPC) in water have been reported to form a structure at 29 degrees C at the equilibrium air/water surface with a molecular density equal to that of a typical bilayer. In this study, the water permeability of this structure has been evaluated by measuring the rate of water evaporation from DMPC dispersions in water in the temperature range where the surface film density exceeds that of a monolayer. Evaporation rates for the lipid dispersions did not deviate from those for lipid-free systems throughout the entire temperature range examined (20–35 degrees C) except at 29 degrees C, where a barrier to evaporation was detected. This strengthens the view that the structure that forms at this temperature has the properties of a typical bilayer.
ISSN:0006-3495
1542-0086
DOI:10.1016/S0006-3495(85)83893-5