Natural deep eutectic solvents (NADES)-Extracted Anthocyanins: Bioaccessibility in electrospun PEO microfibers.

Anthocyanins extracted with deep eutectic solvent (NADES) (chlorine-chloride: xylitol, 5:2) were used to produce polyethylene oxide (PEO) composites through electrospinning technique, analyzing their microscopic and physical characteristics. The coated anthocyanins were then subjected to in vitro gastrointestinal digestion to evaluate their bioaccessibility compared to lyophilized jussara pulp. The remaining total anthocyanin content (TAC) after intestinal in vitro digestion did not change significantly among the assessed samples, and both showed around 30% recovery. The TAC recovery after the gastric phase, on the other hand, showed a major difference (70.84% vs. 48.13%), revealing that the composites fabricated by the electrospinning technique can significantly maintain anthocyanins NADES-extracted stability during the gastric phase of digestion, potentially allowing better absorption trough stomach wall. The results can be considered a first step to applying anthocyanins-encapsulated in foodstuff as a natural pigment.

Fermented Jussara: Evaluation of Nanostructure Formation, Bioaccessibility, and Antioxidant Activity.

Among the species of plants present in the Atlantic Forest, the jussara (Euterpe edulis Mart.) stands out for the contents of bioactive compounds present in its composition. Fermentation processes can be essential in converting bioproducts and bioactive compounds, improving their biological properties. In addition, the improvement of procedures for the maintenance of the features of bioactive compounds has been a research focus in recent years, and the nanotechnology features that can potentially solve this issue have been highlighted among the most reviewed paths. The present work focused on tailoring nanostructures applying polyethylene oxide, assembling fermented jussara pulp nanofibers, and assessing their characteristics. The results revealed the formation of fermented jussara nanofibers with a diameter of 101.2 ± 26.2 nm. Also, the obtained results allow us to state that it is possible to maintain or even increase the antioxidant activity of anthocyanins and their metabolites after fermentation processes.