Effect of pasteurization on in vitro α-glucosidase inhibitory activity of apple juice
2018
Abstract The in vitro α-glucosidase inhibitory activity of raw, mildly ( F 71.7 5 = 0.4 min, 5 Log reductions of Cryptosporidium parvum ) and intensively ( F 90 12 =14.8 min, 2 Log reductions of Alicyclobacillus acidoterrestris ) pasteurized apple juice was studied. Raw apple juice (23 mg dw /mL) caused 90% α-glucosidase inhibition. Analogous results were obtained for the mildly treated sample. The most intense treatment reduced by 35% the α-glucosidase inhibition. However, such a decrease was associated with an increase in the phenolic content, suggesting that α-glucosidase inhibition might not rely on these compounds, but depend on more complex mechanisms. Apple juice was combined with acarbose to investigate their interaction towards α-glucosidase inhibition. A synergistic behavior was observed for concentrations
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