Effect of microencapsulation methods on the survival of freeze-dried Bifidobacterium bifidum

Fan Zhang, Xiao Yan Li, Hyun Jin Park, Min Zhao

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Six kinds of Bifidobacterium bifidum microcapsules were prepared by extrusion methods, emulsion methods and coacervation methods. Effects of preparation methods on the survival of encapsulated B. bifidum were examined. Results showed that microcapsules prepared by emulsion method with alginate and chitosan exhibited the best protection for B. bifidum. The diameter was 10-20m, encapsulation efficiency was 90.36% and the live cell amount was 3.01 × 10 cfu/g after freeze-drying. Encapsulated cells exhibited significantly higher resistance to artificial gastrointestinal juice and the cell numbers were above 10 cfu/g after exposure to simulated gastric (pH 1.2) and bile salt (1%, w/v). Cell numbers of microencapsulated B. bifidum was 8.61 × 10 cfu/g after storage at 37°C, relative humidity 60%-65% for 3 months. Results indicated microcapsules prepared with alginate and chitosan by emulsion method could successfully protect B. bifidum against adverse conditions and it might be useful in the delivery of probiotic cultures as a functional food.

Original languageEnglish
Pages (from-to)511-518
Number of pages8
JournalJournal of Microencapsulation
Volume30
Issue number6
DOIs
Publication statusPublished - 2013 Aug 5

Keywords

  • Bifidobacterium bifidum
  • Bile solution
  • Heat treatment
  • Microencapsulation
  • Simulated gastric juice
  • Viability

ASJC Scopus subject areas

  • Bioengineering
  • Pharmaceutical Science
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Colloid and Surface Chemistry

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