“…The default extraction conditions [22] , [23] were as follows: liquid-to-material ratio, 15; ethanol concentration, 40%; ultrasonic time, 10 min; and ultrasonic power, 300 W. The other conditions were kept constant when one of the factors was examined. The effects of four factors: liquid-to-material ratio (5, 10, 15, 20, and 25), ethanol concentration (20%, 30%, 40%, 50%, and 60%), sonication time (5, 10, 20, 40, and 60 min), and sonication power (150, 200, 300, 400, and 500 W), on the yield of total polyphenols and ellagic acid from pomegranate flowers were investigated.…”