Abstract
Crude Zizyphus Jujuba cv. Junzao polysaccharides (CZP) were extracted by hot water and ultrasound-assisted extraction respectively. Using a short application of ultrasound, the yield of polysaccharides increased from 6.23 to 7.95%, which represents an increase of about 27.6%. Both CZPU and CZPH were composed of arabinose, rhamnose, glucose, galactose, and mannose. However, the molar ratio of CZPU was 5.46: 4.96: 5.17: 2.63: 1, while it was 5.46: 4.89: 3.65: 2.54: 1 for CZPH. Furthermore, CZPU had stronger antioxidant activities than CZPH by evaluating in hydroxyl radical and ferric-reducing antioxidant power (FRAP) assay.
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