treated strawberries with
non-thermal technologies, such as ultrasound (35 kHz), and
observed higher anthocyanin contents than in samples washed
with chemical solutions when stored at room temperature for 6
days. studied
the stability of anthocyanins in sonicated (20 kHz) strawberry juice
during storage and observed that this compound presented high
levels of retention. observed the significant
retention of anthocyanins in grape juices after treatment with ultrasound
(at a constant frequency of 20 kHz and pulse durations of
5 s on and 5 s off): 97.5% AC (cyanidin), 48.2% MA (malvanidina) and
80.9% DA (delphinidin). commented that the
degradation of the anthocyanins might be related to oxidation reactions
promoted by the interaction of free radicals formed during
sonication.