title: [Graded ethanol precipitation method on physicochemical properties and antioxidant activities of polysaccharides extracted from Astragalus Radix].
abstract: Astragalus polysaccharide has been widely used in food and medicinal industry owing to its health-promoting properties. In order to characterize better the relationship among molecular weight, structure-activity and activities, a simple method was used different concentration of ethanol including 30% (PW30), 50% (PW50), 70% (PW70), 75% (PW75), 80% (PW80) and 90% (PW90) to precipitate Astragalus polysaccharides into different molecular weight. As a result, PW90 showed smooth surface and the strongest antioxidant activity among these six fractions (P < 0.05). In conclusion, graded ethanol precipitation was a simple method to separate Astragalus polysaccharides into different molecular weight with different antioxidant activity fractions.
authors.forename: Hong-fa
authors.initials: HF
authors.lastname: Li
authors.forename: Song-bo
authors.initials: SB
authors.lastname: Guo
authors.forename: Shu-li
authors.initials: SL
authors.lastname: Man
authors.forename: Ya-ya
authors.initials: YY
authors.lastname: Fan
authors.forename: Ting-ting
authors.initials: TT
authors.lastname: Wang
authors.forename: Xia
authors.initials: X
authors.lastname: Li
authors.forename: Wen-yuan
authors.initials: WY
authors.lastname: Gao
mesh_terms: D000975:Antioxidants / Q000494:pharmacology*; D027883:Astragalus Plant / Q000737:chemistry*; D011232:Chemical Precipitation; D000431:Ethanol / Q000737:chemistry; D011134:Polysaccharides / Q000737:chemistry* / Q000494:pharmacology
chemical_list: D000975:Antioxidants; D011134:Polysaccharides; D000431:Ethanol