Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9757642 | Chemistry and Physics of Lipids | 2005 | 11 Pages |
Abstract
The water dispersibility of astaxanthin was greatly enhanced by converting it to a disodium disuccinate salt. This carotenoid salt behaved as a bolaamphiphile in water; dynamic light scattering (DLS) revealed the formation of stable aggregates with an average hydrodynamic radius close to 1 μm. Larger aggregates were observed in solutions of increased osmolarity. Absorption spectra demonstrated that the aggregates could withstand the addition of 20% acetonitrile before disintegrating to monomers. The physicochemical properties of this astaxanthin derivative in solution were comprehensively studied by measuring surface tension, critical aggregate concentration, surface concentration, molecule area, free energy of adsorption and micellation, adsorption-aggregate energy relationship, and equilibrium constants, and then compared with similar compounds reported previously in the literature.
Related Topics
Physical Sciences and Engineering
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Authors
Bente Jeanette Foss, Hans-Richard Sliwka, Vassilia Partali, Stine Nalum Naess, Arnljot Elgsaeter, Thor Bernt Melø, K. Razi Naqvi, Sean O'Malley, Samuel F. Lockwood,