【摘要】 以玉米浆(CSL)和蛋白胨作为右旋糖酐发酵的混合氮源,并对其配比进行优化。结果表明,种子培养基中CSL含量为0.08%、蛋白胨为0.1%;发酵培养基中CSL含量为0.1%、蛋白胨为0.08%,粗右旋糖酐收率达到91.8%,菌体活性强。更多还原

【Abstract】 The fermentation conditions of dextran using corn steep liquor(CSL)and peptone as mixed nitrogen source were studied in this paper.The optimal fermentation conditions were obtained as followed:the concentration of CSL and peptone were 0.08% and 0.1% in seed medium,respective- ly.The concentration of CSL and peptone were 0.1% and 0.08% in fermentation medium,respectively.By applying these optimum conditions,the yield of dextran product reached 91.8% and the activities of cells were high.更多还原