Water-in-oleogel emulsion based on ¿-oryzanol and phytosterol mixtures: Challenges and its potential use for the delivery of bioactives

• Type: Article in International Scientific Journal
• Date: 2022

Authors

Pinto, TC (Author) FCUP; Martins, AJ (Author) Other; Pastrana, L (Author) Other; Pereira, MC (Author) Other; Cerqueira, MA (Author) Other

Journal

Title: Journal of the American Oil Chemists' Society

Vol. 99

Pages: 1045-1053

ISSN: 0003-021X

Indexing

ISI Web of Knowledge - 1 Citation

Scopus - 1 Citation

Other information

Authenticus ID: P-00X-018

DOI: 10.1002/aocs.12636

Abstract (EN): The present work aimed at developing a novel water-in-oleogel emulsion using a mixture of gamma-oryzanol and phytosterols as gelator. The gelator network was severely affected by the presence of water, with single beta-sitosterol crystals being the main contributors to the self-standing ability of the emulsions. X-ray analyses have shown sharp crystallographic reflections for anhydrous and hemihydrated beta-sitosterol crystals, independently of the gelator concentrations and water-in-oleogel ratios. The samples with higher water content have shown additional reflections that could be traced back to monohydrated beta-sitosterol crystals, but these were not present after 7 days. The rheological analysis has revealed the impact of the emulsion composition on their strength. Foreseeing their use for the co-delivery of bioactive compounds, we added beta-carotene and epigallocatechin gallate to the emulsions. We confirmed their viability toward the incorporation of bioactives in their free-form, constituting a proof of concept for the fortification of lipid-rich foods with both oil and water-soluble bioactive compounds.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9