Title: Extraction and antioxidant activity of polysaccharides from papaya leaf
Abstract: Ultrasonic-assisted extraction was applied to extract polysaccharides from papaya leaves,and their antioxidant activity for DPPH.and.OH free radical were examined.The optimal extraction conditions were obtained through single factors and orthogonal experiments.The results show that the optimal ultrasonic frequency,ethanol concentration,extracting time,and ratio of solid to liquid were 90 kHz,95%,60 min,1:25(m/v),respectively.Under the optimal conditions,the extraction yield of polysaccharide was 2.47%.Moreover,the IC 50 values of the polysaccharides against DPPH.and.OH free radical were 29 μg/mL and 110 μg/mL,respectively.
Publication Year: 2012
Publication Date: 2012-01-01
Language: en
Type: article
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