Stability of emulsions stabilised by two physiological surfactants; L-alpha-phosphatidylcholine and sodium taurocholate

Fillery-Travis, Annette, Foster, L. H. and Robins, M. M. (1995) Stability of emulsions stabilised by two physiological surfactants; L-alpha-phosphatidylcholine and sodium taurocholate. Biophysical Chemistry, 54 (3). pp. 253-260. ISSN 0301-4622

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Abstract

The emulsion phase formed within the stomach and duodenum during digestion of a fatty meal has been modelled using two physiological surfactants, the phospholipid l-α-phosphatidylcholine (PC) and the bile salt sodium taurocholate (NaT). Upon dilution of the phospholipid stabilised emulsions with a solution of NaT the bile salt became incorporated into the oil/water interface imparting a negative charge to the droplet surface. The magnitude of the droplet microelectrophoretic mobility for the mixed PC and NaT system was 47% of that found for emulsion droplets stabilised by NaT alone. But the electrostatic repulsion between droplets was not sufficient to account for the observed improvement in emulsion stability to coalescence. It is suggested that a residual liquid crystalline phospholipid interface is present imparting a significant steric component to the stabilisation of the emulsions droplets.

Item Type: Article
Research Areas: A. > Work and Learning Research Centre
Item ID: 17724
Depositing User: Paul Stapleton
Date Deposited: 29 Sep 2015 09:03
Last Modified: 09 May 2017 11:32
URI: https://eprints.mdx.ac.uk/id/eprint/17724

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