Moreover, the increase of ultrasonic power from 125 to 200 W also leads to a decrease of antioxidant activity by 44% at 200 W in comparison with the CSE. The high-est antioxidant activities obtained with ultrasounds are with powers at 100 and 125 W where we only noticed a decrease of 29%. This result is similar to that reported by Dahmoune et al.(2013).