Naslov
The effect of freeze-drying, pasteurisation and high-intensity ultrasound on gastrointestinal stability and antioxidant activity of blueberry phenolics

Autori
Liović, Nikolina ; Bratanić, Andre ; Zorić, Zoran ; Pedisić, Sandra ; Režek Jambrak, Anet ; Krešić, Greta ; Bilušić, Tea

Izvornik
International Journal of food science & technology (0950-5423) 56 (2021), 4; 1996-2008

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
antioxidant ; freeze-drying ; high-intensity ultrasound ; human digestive enzymes ; in vitro digestion ; pasteurisation ; phenolics

Sažetak
The influence of freeze-drying, pasteurisation and high-intensity ultrasound on gastrointestinal stabilityand antioxidant activity of cultivated blueberry phenolics was investigated. Quantitative and qualitativeanalyses were done before and after a two-phase in vitro digestion by human digestive enzymes. Antioxi-dant capacity of blueberry phenolics before and after simulated digestion was evaluated using DPPH andthe FRAP assays. After the simulated gastric digestion phase, high stability of phenolics was determined, especially after freeze-drying. During the simulated duodenal digestion, the most affected compounds wereanthocyanins. The average loss of quercetin derivatives was 60%, while in all ultrasound- treated samples, a 3- fold increase in the concentration of phenolic acids was observed. The highest antioxidant activityafter in vitro gastric and duodenal digestion was determined in a freeze- dried sample. The results afterin vitro digestion demonstrated that the use of freeze-drying and high-intensity ultrasound can ensure bet-ter gastrointestinal stability and higher antioxidant activity of blueberry phenolics.

Izvorni jezik
Engleski

Znanstvena područja
Prehrambena tehnologija

POVEZANOST RADA