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A novel approach for utilizing wheat Dried Distillers' Grains with Solubles (DDGS) to produce exopolysaccharide by Preussia aemulans was explored. For degrading the insoluble polymer of wheat DDGS, the UV-irradiation method was used. After irradiation of 24 h, the soluble saccharide content of wheat DDGS medium was increased by 67%. The optimum fermentation conditions were: 5% (w/v) of fructose, 0.5% (w/v) of yeast extract, 7.5 of pH value, 5% (v/v) of the inoculum size, 60 rpm of shaking condition and 5 days of the fermentation time. The maximum exopolysaccharides yield of fermented broth under the optimum fermentation conditions was 3.51±0.24 g/L. Comparing with the unfermented wheat DDGS water extract, the exopolysaccharide yield of fermented broth was increased by 36%. The crude exopolysaccharide (EPS) indicated remarkable antioxidative activities though four antioxidant assays. Therefore, the crude EPS could be utilized as antioxidative food additives and functional feed in the future.

advance journal of food science and technology/advance journal of food science and technology

Antioxidative Activity of Exopolysaccharide Extract from Fermented Wheat Distillers\'dried Grains Using UV-Irradiation Degradation Pretreatment by &lt;em&gt;Preussia aemulans&lt;/em&gt;