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Effect of in vitro digestion on water-in-oil-in-water emulsions containing anthocyanins from grape skin powder

  • Weili Xu*
  • , Yang Yang
  • , Sophia Jun Xue
  • , John Shi
  • , Loong Tak Lim
  • , Charles Forney
  • , Guihua Xu
  • , Bio Sigui Bruno Bamba
  • *Corresponding author for this work
  • School of Chemistry and Chemical Engineering, Harbin Institute of Technology
  • Agriculture and Agri-Food Canada
  • University of Guelph

Research output: Contribution to journalArticlepeer-review

Abstract

The effects of in vitro batch digestion on water-in-oil-in-water (W/O/W) double emulsions encapsulated with anthocyanins (ACNs) from grape skin were investigated. The double emulsions exhibited the monomodal distribution (d = 686 ± 25 nm) showing relatively high encapsulation efficiency (87.74 ± 3.12%). After in vitro mouth digestion, the droplet size (d = 771 ± 26 nm) was significantly increased (p < 0.05). The double W1/O/W2 emulsions became a single W1/O emulsion due to proteolysis, which were coalesced together to form big particles with significant increases (p < 0.01) of average droplet sizes (d > 5 µm) after gastric digestion. During intestinal digestion, W1/O droplets were broken to give empty oil droplets and released ACNs in inner water phase, and the average droplet sizes (d < 260 nm) decreased significantly (p < 0.05). Our results indicated that ACNs were effectively protected by W/O/W double emulsions against in vitro mouth digestion and gastric, and were delivered in the simulated small intestine phase.

Original languageEnglish
Article number2808
JournalMolecules
Volume23
Issue number11
DOIs
StatePublished - 29 Oct 2018
Externally publishedYes

Keywords

  • Anthocyanins
  • Controlled release
  • In vitro digestion
  • Soybean protein isolate
  • W/O/W double emulsions

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