Abstract
Interaction of homologous fatty acids (C3-C18) with sodium deoxycholate was investigated. From NMR and ultrasonic results it was found that short chain homologues (up to C9) do not participate in the formation of mixed micelles with sodium deoxycholate. Fatty acid homologues with longer chains (starting with C9) form mixed micelles by "burying" hydrophobic chains in hydrophobic environment of a sodium deoxycholate micelle.
Highlights
It is evident that low molecular homologues in micellar solution of deoxycholate have volumes close to those obtained for aqueous solutions without micelle formation
With increasing length of the hydrophobic chain, starting with C9, apparent molal volume increases, reaching in the case of C lo and C the values obtained for volumes in aqueous micellar solution
Very close compressibilities obtained in CloNa and in sodium deoxycholate (NaDC) positively indicate that fatty acid molecules are “buried” in a hydrophobic environment of deoxycholate micelles
Summary
G. V. Shilnikov, A. P. Sarvazyan, M. Okon, J. Zakrzewska,*J. Hranisavljevic,* and D. Vucelic* Institute of Biological Physics, USSR Academy of Science, Pushchino, Moscow Region, USSR, and Institute of General and Physical Chemistry, Belgrade University Institute of Physical Chemistry,* Faculty of Science, Belgrade University, Belgrade, Yugoslavia
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