. In our case, water was indeed the
best extraction solvent, yet its extraction capacity is affected by
the combined effect of stirring speed and time period; a lower stirring
speed (300 rpm) combined with a longer extraction time period
(20 h) originated an extract with lower antioxidant capacity
(p < 0.05); however, when sonication was applied after a previous
stirring at 300 rpm for 5 min the extraction response was signifi-
cantly improved (p < 0.05)