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首页> 外文期刊>Carbohydrate Polymers: Scientific and Technological Aspects of Industrially Important Polysaccharides >Sulfated modification, characterization and structure-antioxidant relationships of Artemisia sphaerocephala polysaccharides
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Sulfated modification, characterization and structure-antioxidant relationships of Artemisia sphaerocephala polysaccharides

机译：Sulfated modification, characterization and structure-antioxidant relationships of Artemisia sphaerocephala polysaccharides

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摘要

Sulfated polysaccharides exerted potent biological property which was relative to degree of sulfation (DS), M_w, substitution position and chain conformation. In the present study, sulfated derivatives of Artemissia sphaerocephala polysaccharide (ASP) with different DS were synthesized by chlorosulfuric acid/pyridine method. FT-IR and ~(13)C NMR analysis indicated that C-6 substitution was predominant in sulfated ASP (SASP) compared with other positions at C-2. In the sulfation reaction, a sharp decrease in M_w was observed in SASP. The d_f values from 1.96 to 2.77 indicated that the -SO3 H groups leading to the relatively expanded conformation of SASP. Antioxidant assays showed that SASP had better antioxidant activities. The data obtained in vitro models indicated that high DS and moderate M_w showed the best antioxidant capacities.

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