Abstract
The scavenging activity of polysaccharides from Lycium barbarum, Lentinus edodes and Ganoderma Lucidum Karst to DPPH free radicals was investigated. It was found that among the three polysaccharides, Lycium barbarum polysaccharides (LBP) exhibits the best scavenging activity. Polysaccharide loaded collagen membranes were prepared by mixing LBP with collagen, starch, glycerol, sodium carboxymethyl cellulose and glutaraldehyde. In vitro drug release from membranes was evaluated. With increasing the immersion time, the release rate first increases and then slows down. Meanwhile, the scavenging activity to DPPH radicals exhibits similar variation, in agreement with a good release effect of the membrane. The optimal formulation of collagen membrane and preparation parameters were obtained considering the overall properties and the scavenging activity to radicals.
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