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Water-soluble polysaccharide was isolated from Ginkgo biloba leaves with the method of water-dissolving and ethanol-precipitating. The optimized condition for polysaccharide by orthogonal experiment was water to sample as 30:1 (v/w), at 80°C for 3.5 h. Under the condition the finally dried extract was 9.025%, and the content of polysaccharide was 20.9% in the extract and 1.887% in the leaves. The...
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