title: Antioxidant activity of xanthan oligosaccharides prepared by different degradation methods.
abstract: Two kinds of water soluble xanthan oligosaccharides (XGOS-A and XGOS-B) with similar molecular weights were prepared by oxidative degradation of xanthan gum (XG) under acidic and alkaline condition, respectively. Antioxidant activity of XGOS-A and XGOS-B was evaluated by the scavenging of superoxide anion radical ((·)O(2)(-)), hydroxyl radical (OH), 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical, hydrogen peroxide (H(2)O(2)), determination of ferrous ion chelating activity and reducing power. All the above antioxidant evaluation indicated that XGOS-A and XGOS-B exhibited good antioxidant activity in a concentration-dependent manner. The XGOS-B exhibited better antioxidant activity than XGOS-A. These results may be related to the different structure properties of XGOS-A and XGOS-B especially the different contents of pyruvate acid and reducing sugar.
authors: College of Food Science & Technology, Shanghai Ocean University, Shanghai 201306, China.
authors: Xiaoying
authors: X
authors: Xiong
authors: Ming
authors: M
authors: Li
authors: Jing
authors: J
authors: Xie
authors: Qi
authors: Q
authors: Jin
authors: Bin
authors: B
authors: Xue
authors: Tao
authors: T
authors: Sun
mesh_terms: D001713:Biphenyl Compounds / Q000737:chemistry; D002240:Carbohydrate Sequence; D016166:Free Radical Scavengers / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D017665:Hydroxyl Radical / Q000737:chemistry; D007501:Iron / Q000737:chemistry; D007502:Iron Chelating Agents / Q000737:chemistry*; D008969:Molecular Sequence Data; D009844:Oligosaccharides / Q000737:chemistry*; D010084:Oxidation-Reduction; D010851:Picrates / Q000737:chemistry; D011135:Polysaccharides, Bacterial / Q000737:chemistry*; D012995:Solubility; D013481:Superoxides / Q000737:chemistry; D014867:Water / Q000737:chemistry
chemical_list: D001713:Biphenyl Compounds; D016166:Free Radical Scavengers; D007502:Iron Chelating Agents; D009844:Oligosaccharides; D010851:Picrates; D011135:Polysaccharides, Bacterial; D014867:Water; D013481:Superoxides; D017665:Hydroxyl Radical; D006861:Hydrogen Peroxide; C004931:1,1-diphenyl-2-picrylhydrazyl; D007501:Iron; C002563:xanthan gum