Transglutminase treatment to improve physical properties of acid gels from enriched goat milk.

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

Abstract

A combined treatment of dry matter enrichment and protein cross-linking with microbial transglutaminase was applied to improve the rheological and physical properties of acid gels from goat milk, which usually appear as weak because of a low α S-casein content. Enzyme incubation was applied for 30-420min and inactivation was achieved by heat treatment or by addition of N-ethylmaleimide. Subsequent acidification of enriched and cross-linked goat milk induced by d-glucono-δ-lactone at 30°C, resulted in a significantly higher stiffness and lower syneresis of the gels compared to gels from untreated goat milk. Highest stiffness values were obtained after 300min enzyme treatment, and an additional impact of the heating step for enzyme inactivation was observed. This combined procedure of dry matter enrichment and enzyme treatment allowed the production of gels with similar properties as gels from cow milk and appears as a promising tool to manufacture goat milk yogurt with satisfying texture properties.

Details

Original languageEnglish
Pages (from-to)47-53
JournalSmall ruminant research : the official journal of the International Goat Association
Volume106
Issue number1
Publication statusPublished - 2012
Peer-reviewedYes

External IDs

Scopus 84862187449

Keywords

Keywords

  • Lebensmitteltechnologie