title: Preparation Methods and Antioxidant Activities of Polysaccharides and Their Derivatives.
abstract: BACKGROUND
  In recent years, the antioxidant effects of polysaccharides have become a hot spot in the field of polysaccharide research.
  
  
  METHODS
  Herein, the action mechanisms of polysaccharide antioxidation and scavenging free radicals were analyzed. The research progresses on the preparation methods and antioxidant properties of polysaccharides and their derivatives were summarized.
  
  
  CONCLUSIONS
  Investigating the antioxidant activities of polysaccharides and their derivatives can find useful polysaccharides and their derivatives, which have great potential as natural antioxidants used in functional foods or medicines.
authors.affiliation: College of Chemistry, Chongqing Normal University, Chongqing, 401331, China.
authors.forename: Xinya
authors.initials: X
authors.lastname: Mei
authors.affiliation: College of Chemistry, Chongqing Normal University, Chongqing, China.
authors.forename: Chengkun
authors.initials: C
authors.lastname: Yi
authors.affiliation: College of Chemistry, Chongqing Normal University, Chongqing, 401331, China.
authors.forename: Gangliang
authors.initials: G
authors.lastname: Huang
mesh_terms: D031583:Althaea / Q000737:chemistry / Q000378:metabolism; D000975:Antioxidants / Q000737:chemistry* / Q000302:isolation & purification; D030681:Ficus / Q000737:chemistry / Q000378:metabolism; D010936:Plant Extracts / Q000737:chemistry; D011134:Polysaccharides / Q000737:chemistry* / Q000302:isolation & purification; D017382:Reactive Oxygen Species / Q000378:metabolism
chemical_list: D000975:Antioxidants; D010936:Plant Extracts; D011134:Polysaccharides; D017382:Reactive Oxygen Species
keywords: Antioxidant activities; Bletilla striata; derivatives; polysaccharides; preparation; reactive oxygen species