Abstract
Pueraria lobata polysaccharides (PLPs) were obtained by hot water extraction using Pueraria lobata as raw material. Structural analysis revealed that PLPs may have a repetitive backbone units of →4) -α-D-Glcp (1→4-α-D-Glcp (1→. Phosphorylated Pueraria lobata polysaccharides (P-PLPs), carboxymethylated Pueraria lobata polysaccharides (CM-PLPs) and acetylated Pueraria lobata polysaccharides (Ac-PLPs) were obtained by chemical modifications of PLPs, respectively. The physicochemical properties and antioxidant activities of these four Pueraria lobata polysaccharides were studied in comparison. In particular, the clearance rate of P-PLPs exceeded 80 %, and was expected to achieve the same effect as Vc . The results showed that the effects of different chemical modifications on the antioxidant activity of PLPs varied greatly.
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