几种添加物对D—核糖产量的影响

研究了几种物质对D－核糖产量的影响，研究表明，当发酵培养基中玉米浆的含量为25g/L，D－核糖产量达到最高，为65g/L。发酵培养基中添加适量的粉及山梨醇亦有利于D－核糖的积累，当粉与山梨醇的添加量分别为10g/L及40g/L时，D－核糖产率分别增加7.8%、4.7%，而在发酵培养基中加入丙二酸可抑制D－核的分泌，在40ml发酵培养基中添加1ml丙二酸后，D－核糖的产率下降73.8％。甲醇也可抑制D－核糖的积累，当发酵培养基中的甲醇添加量为16g/L时，D－核糖产率下降66.2%。

Effects of several substances on production of D-ribose

Transketolase-deficient Bacillus pumilus stain was used to produce D-ribose in food and pharmacy industry.Effects of some substance on D-ribose production were researched in this paper.D-ribose production has been improved about 7.8% when 10g/L yeast powder was added in the medium,and D-ribose production has been improved about 4.7% when 10g/L sorbitol was added in the medium.The D-ribose titer reduced when the medium was added with other substance such as propane diacid.The fact that formic acid can reduce the D-ribose titer confirms the presence of the ribulose monophosphate pathway in Bacillus pumilus that has been founded in Bacillus subtilis.