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Related Experiment Videos

Membrane:buffer partition coefficient for ethanol in dimyristoylphosphatidylcholine

E S Rowe

    Alcoholism, Clinical and Experimental Research
    |January 1, 1981
    PubMed
    Summary

    Ethanol addition lowers the phase transition temperature of dimyristoylphosphatidylcholine (DMPC) membranes. This study quantifies ethanol

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    Area of Science:

    • Biophysics
    • Physical Chemistry

    Background:

    • Dimyristoylphosphatidylcholine (DMPC) is a common phospholipid model system.
    • Understanding lipid-water-solute interactions is crucial for membrane science.

    Purpose of the Study:

    • To investigate the effect of aqueous ethanol on DMPC phase transitions.
    • To determine the thermodynamic parameters governing these changes.

    Main Methods:

    • Optical density measurements were used to monitor DMPC phase transitions.
    • Varying concentrations of aqueous ethanol were employed.

    Main Results:

    • Aqueous ethanol shifts the DMPC phase transition to lower temperatures.
    • The partition coefficient of ethanol into DMPC was determined to be 0.07 L/kg membrane.

    Conclusions:

    • Ethanol incorporation into DMPC membranes alters their phase behavior.
    • Thermodynamic analysis provides insights into lipid-solute interactions.

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