Sodium Caseinate-Phospholipids Behavior in Emulsification and Its Implication to Emulsifying Properties

Authors

  • Teti Estiasih

Abstract

This research was conducted to analyze sodium caseinate-phospholipids behaviour in emulsion  These substances were used synergistically as emulsifier in many food systems.  The implication of its behavior to  the changes of protein emulsifying properties was further studied.

Sodium caseinate-phospholipids relationship was analyzed from the changes of adsorbed protein, adsorbed phospholipids, and casein-phospholipids complexation.  The results showed that the increasing phospholipids concentration in sodium caseinate stabilized emulsion made adsorbed protein decrease and adsorbed phospholipids increase.  These indicated the displacement of caseinate by phospholipids to adsorb at oil globule interface  The more hidrophilic casein-phospholipids complex was formed and desorbed  sodium caseinate from oil globule interface.

The results of displacement and complexation were decreasing adsorbed protein, percentage of adsorbed protein, and emulsion stability index. Emulsifying activity index and interfacial area decreased up to phospholipds concentration of 1,0%, and then increased. Protein load increased up to the phospholipids concentration of 1,0% and further decreased.  These  were caused by the changes of sodium caseinate-phospholipids composi-tion at oil globule interface.

 

Keywords: protein emulsifying properties, displacement, compexation.

Downloads

Published

2012-01-20

Issue

Vol. 4 No. 3 (2003)

Section

Articles

License

Authors who publish with this journal agree to the following terms:

    1. Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal
    2. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal