Naslov
Cellulose amount affected adsorption of tart cherry polyphenols on cellulose

Autori
Vukoja, Josipa ; Buljeta, Ivana ; Pichler, Anita ; Šimunović, Josip ; Kopjar, Mirela

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Skup
IFT first 2022

Mjesto i datum
Chicago (IL), Sjedinjene Američke Države, 10.07.2022. - 13.07.2022

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
tart cherry polyphenols ; cellulose ; cellulose amount

Sažetak
Introduction Dietary fibers and polyphenols are well known for their health benefits. Nowadays, one of the emerging trends related to diet is the utilization of functional food additives, so consequently, these compounds are studied together. Preparation of functional complexes requires selection of adequate conditions to achieve the highest adsorption of polyphenols onto fibers, and additionally their stability over time is quite challenging. The aim of this study was to investigate the adsorption efficiency of tart cherry polyphenols onto cellulose upon the increase of cellulose amount during complexation and stability over long-time storage. Method Freeze-dried complexes were prepared by complexation of cellulose (2.5%, 5%, 7.5% and 10%) with the constant amount of tart cherry juice for 30 or 60 minutes. Obtained complexes were analyses for total polyphenols and monomeric anthocyanins which were evaluated spectrophotometrically. FRAP, CUPRAC, DPPH and ABTS assays were applied for evaluation of antioxidant activity complexes, while the HPLC method was applied for identification and quantification of individual polyphenols. Results Individual polyphenols determined in complexes were cyanidin-3-glucosyl- rutinoside, cyanidin-3-rutinoside, rutin, quercetin, kaempferol, neochlorogenic and chlorogenic acids. Results showed that with the increase of cellulose amount during complexation decrease of adsorption efficiency of total polyphenols was observed and that trend was also recorded for individual polyphenols. Time of complexation also affected the adsorption of polyphenols. Prolonged complexation negatively affected the adsorption of both anthocyanins, phenolic acids and rutin onto cellulose. However, it had a positive effect on quercetin and no effect on the adsorption of kaempferol. During one year of storage, loss of polyphenols occurred, anthocyanins and phenolic acids were lost to the highest extent, while the other 3 compounds were relatively stable.

Izvorni jezik
Engleski

Znanstvena područja
Prehrambena tehnologija

POVEZANOST RADA