Influence of ultrafiltration on modification of surface hydrophobic sites of the milk protein system in the course of renneting

Erdem Y. K.

JOURNAL OF FOOD ENGINEERING, vol.44, no.2, pp.63-70, 2000 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 44 Issue: 2
  • Publication Date: 2000
  • Doi Number: 10.1016/s0260-8774(99)00165-x
  • Journal Name: JOURNAL OF FOOD ENGINEERING
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.63-70
  • Hacettepe University Affiliated: Yes

Abstract

In this study the fluorescent probe binding method was used to explain the changes on the surface of milk protein caused by ultrafiltration. Raw skimmilk samples were concentrated 2-fold and 3-fold by ultrafiltration. The hydrophobicity of the surface sites of milk proteins in retentates and unconcentrated milk was examined. It was found that the number of surface hydrophobic sires and affinity to the hydrophobic/fluorescent marker decreased with ultrafiltration. The modification of protein functionality was explained as a changed protein surface hydrophobicity. This study suggests that the renneting pattern for milk is changed by this modification and can be one of the main reasons for some problems in hard cheese manufacturing from retentate. (C) 2000 Elsevier Science Ltd. All rights reserved.