Ultrasonic wave-assisted extraction and antibacterial activity of flavonoids from kiwifruit peels
In order to develop and use the kiwifruit resource reasonably,the optimal process for the ultrasonic wave-assisted extraction of total flavonoids from kiwifruit peels was explored on the basis of single factor and orthogonal array experiments.The optimal extraction conditions were found to be:extraction solvent 60% ethanol,extraction temperature 60 ℃;material/solvent ratio of 1:30,extraction duration 40 min,the total rate was 26.772mg/g under this condition.The strong antibacterial effect of ethanol extract from kiwifruit against Escherichia coli,Staphylococcus aureus and Bacillus subtilis were also observed through filter paper method.