【摘要】 以玉米淀粉为原料进行短梗霉多糖发酵 ,淀粉不完全水解糖经脱色脱盐处理后配制培养基与未经脱色、脱盐的比较 ,多糖转化率提高 1倍左右。无论是酸法水解糖还是酶法水解糖 ,其DE值在 40至 5 0之间可获得较高的多糖产率。发酵罐中培养得到最高多糖产率 6 0g/L ,多糖分子量大小在 6 1.7× 10 4 ～ 5 .5× 10 4 D之间更多还原

【Abstract】 Pullulan fermentation was carried out with corn starch as carbon source. The partially hydrolyzed starh syrup which was treated by decolourization and demineralization doubled the pullulan yield compare to the nontreated syrup. A DE range of 40%～50% of both acid hydrolyzed and enzyme hydrolyzed syrup gave higher pullulan yield. During cultivation in the fermentor a highest pullulan yield of 60% was obtained. The pullulan molecular weight ranged from 61.7×10 4～5.5×10 4 Daltons.更多还原