• RMIT Australia
  • RMIT Global
  • RMIT Australia
  • RMIT Europe
  • RMIT Vietnam

• Students
• Alumni
• Staff

Research Repository

Back to Library

• Home
• Browse
• Search
• FAQs
• About
• Contact Us

Alginate-based encapsulation of extracts from beta Vulgaris cv. beet greens: Stability and controlled release under simulated gastrointestinal conditions Gorbunova, N, Bannikova, A, Evteev, A, Evdokimov, I and Kasapis, S 2018, 'Alginate-based encapsulation of extracts from beta Vulgaris cv. beet greens: Stability and controlled release under simulated gastrointestinal conditions', LWT, vol. 93, pp. 442-449. Document type: Journal Article Collection: Journal Articles Title Alginate-based encapsulation of extracts from beta Vulgaris cv. beet greens: Stability and controlled release under simulated gastrointestinal conditions Author(s) Gorbunova, N Bannikova, A Evteev, A Evdokimov, I Kasapis, S Year 2018 Journal name LWT Volume number 93 Start page 442 End page 449 Total pages 8 Publisher Academic Press Abstract We obtained extracts from beet greens using conventional and ultrasound treatments. The work focused on betacyanins, betaxanthins and polyphenols from the extracts following the two distinct extraction protocols. These were used as the bioactive compounds in alginate capsules in order to follow patterns of controlled delivery in simulated gastrointestinal fluids. FTIR was performed to show the nature of interactions between excipient and bioactives. Swelling behaviour and mechanical characterization of the polysaccharide network showed that it remains firm in the harsh gastric conditions but exhibits soft consistency in the simulated environment of the small intestine. There is a direct relationship between mechanical characteristics, hence swelling of the beads, and release rates of bioactives within the in-vitro environment. Peppas-Sahlin equation was applied successfully to demonstrate that the relaxation contribution dominates with increasing time of observation, an outcome that confirms the role of swelling of the alginate capsules in bioactive compound release. Subject Food Chemistry and Molecular Gastronomy (excl. Wine) Keyword(s) Alginate capsules Beet green extracts Controlled release Solvent extraction Ultrasound treatment DOI - identifier 10.1016/j.lwt.2018.03.075 Copyright notice © 2018 Published by Elsevier Ltd. ISSN 0023-6438 Related Links Link Description https://dx.doi.org/10.1016/j.lwt.2018.03.075 Link to Published Version   Versions Version Filter Type Mon, 10 Dec 2018, 14:04:34 EST Filtered Full Citation counts:   Cited 5 times in Thomson Reuters Web of Science Article | Citations Cited 0 times in Scopus Article Altmetric details: Access Statistics: 13 Abstract Views  -  Detailed Statistics Created: Thu, 06 Dec 2018, 10:39:00 EST by Catalyst Administrator