Hydrogel-based encapsulation systems were developed for grape seed phenolics recovered from winemaking byproducts. Proanthocyanidins, monomeric flavanols, flavonols and anthocyanins were extracted from grape seeds with 60% ethanol. Encapsulation of solubilized grape seed phenolics in microbeads with alginate-Ca++ or alginate-chitosan-Ca++ achieved efficiency of 78 and 92%, respectively, higher than those of pure catechin and proanthocyanidins. Encapsulated phenolics showed inhibitory activity towards the brush border enzyme α-glucosidase, which was chosen as a model bioactivity assay. Grape seed phenolics were retained in the hydrogel structure after mixing of the microbeads with bovine milk or rice drink, pasteurization of these beverages to achieve 7 decimal reductions of Mycobacterium avium subsp. paratubercolosis (equivalent to 72 ◦C for 91 s) as well as after intense heat treatment of the rice beverage to achieve 7 decimal reductions of Bacillus cereus (95 ◦C for 20 min).
Encapsulation of grape seed phenolics from winemaking byproducts in hydrogel microbeads – Impact of food matrix and processing on the inhibitory activity towards α-glucosidase / D. Pedrali, S. Barbarito, V. Lavelli. - In: LEBENSMITTEL-WISSENSCHAFT + TECHNOLOGIE. - ISSN 0023-6438. - 133(2020 Nov), pp. 109952.1-109952.7.
|Titolo:||Encapsulation of grape seed phenolics from winemaking byproducts in hydrogel microbeads – Impact of food matrix and processing on the inhibitory activity towards α-glucosidase|
PEDRALI, DAVIDE (Primo)
BARBARITO, SARA (Penultimo)
LAVELLI, VERA AGNESE (Ultimo) (Corresponding)
|Parole Chiave:||Grape seeds; Alginate; Chitosan; α-glucosidase; Encapsulation|
|Settore Scientifico Disciplinare:||Settore AGR/15 - Scienze e Tecnologie Alimentari|
|Progetto:||Biotechnological strategies for the conversion of Winemaking byproducts and their recycling into the food chain: development of new concepts of use|
|Data di pubblicazione:||nov-2020|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1016/j.lwt.2020.109952|
|Appare nelle tipologie:||01 - Articolo su periodico|