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Hydrophilic carotenoids: surface properties and aggregation behavior of a highly unsaturated carotenoid
Bente Jeanette Foss1, Hans-Richard Sliwka, Vassilia Partali
1Department of Chemistry, Norwegian University of Science and Technology, N-7491 Trondheim, Norway.
Abstract:
The water dispersibility of a hydrophobic carotenoid has been greatly enhanced by using it as the acyl part in the synthesis of a highly unsaturated lysophospholipid. Dynamic light scattering has revealed the formation of stable aggregates with an average hydrodynamic radius of a few nanometers, and absorption spectra show that the aggregates can withstand the addition of ethanol or acetonitrile until the volume fraction of water falls below 70 and 62%, respectively. The properties of the carotenoid phospholipids have been characterized by determining surface tension, critical micelle concentration, surface concentration, molecular area, free energy of adsorption and micellation, adsorption-micellar energy relationship, and equilibrium constants.
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