Synbiotic Microencapsulation from Slow Digestible Colored Rice and Its Effect on Yoghurt Quality

Isara Wattananapakasem, Hein J.F. van Valenberg, Vincenzo Fogliano, Adele Costabile, Prisana Suwannaporn*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

4 Citations (Scopus)

Abstract

Lactobacillus plantarum was encapsulated by slowly digestible hydrolyzed heat-moisture-treated (hydrolyzed-HMT) black waxy rice and applied in yoghurt. Incorporating these microcapsules in yoghurt resulted in higher viability of Lactobacillus bulgaricus C49 and Streptococcus thermophilus C44, especially in prolonged storage. The viability of L. bulgaricus and S. thermophilus (7.98 and 8.28 Log CFU/g) in synbiotic yoghurt was higher than in the control (7.81 and 7.96 Log CFU/g). Thirty-two aromatic compounds were detected and classified into 4 groups: alcohols, carbonyls, organic acids, and sulfur. Synbiotic yoghurt produced higher carbonyl compounds, particularly acetaldehyde and diacetyl. On the other hand, higher organic acid especially hexanoic, dodecanoic, acetic, butanoic, and pentanoic acids was observed at the end of fermentation but did not differ from control after storage. Ethanol was also higher in the synbiotic yoghurt due to the breakdown of glucose from starch and acetaldehyde by lactic acid bacteria. Weak correlation was found concerning sulfur compounds. Rice starch granules were aggregated and still retained its hexagonal shape, indicating high resistance to acid fermentation during 28 days of storage. The resistant starch coating from rice could provide a good prebiotic ingredient and allow the design of synbiotic yoghurt with enhanced aroma.
Original languageEnglish
Pages (from-to)1111-1124
JournalFood and Bioprocess Technology
Volume11
Issue number6
Early online date22 Feb 2018
DOIs
Publication statusPublished - Jun 2018

Keywords

  • Colored rice
  • Fecal fermentation
  • Microencapsulation
  • Synbiotic
  • Volatile metabolites
  • Yoghurt

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