Journal
CARBOHYDRATE POLYMERS
Volume 92, Issue 2, Pages 1166-1171Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2012.10.069
Keywords
Xanthan gum; Oxidative degradation; Antioxidant activity; Pyruvate acid
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Funding
- Outstanding Graduate Training Program of Shanghai Ocean University [B-9600-10-0003-7]
- Creative Plan of Shanghai Ocean University [B-5106-11-0088]
- Leading Academic Discipline Project of Shanghai Municipal Education Commission [J50704]
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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-center dot(2)-), hydroxyl radical ((OH)-O-center dot), 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical, hydrogen peroxide (H2O2), 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. (C) 2012 Elsevier Ltd. All rights reserved.
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