【摘要】 对选出的巨大芽孢杆菌突变株Bn ,B5进行了生物学特性及发酵条件的研究 ,发现它们具耐低 pH和抗高浓 2KGA特性。可促进氧化葡萄糖酸杆菌生长 ,使其延迟期缩短 ,产酸增加。适宜的通气量下 ,摇瓶糖酸转化率提高 10 %～ 14% ;当发酵 pH为 6 .2～ 6 .6时 ,转化率提高 2 0 %～ 30 %更多还原

【Abstract】 Biological characteristics and fermentation conditions of Bacillus megaterium mutants Bn and B5 were studied. The optimal pH for Bn and B5 growth was at 6.0-8.0. They graw well in the medium with 3% 2KGA and at pH6.2. The conversion rates of Gluconobacter oxydans with them from L sorbose to 2KGA were increased by 10%-14% under suitable aeration and 20%-30% at fermentation pH at 6.2-6.6 as compared with CK strain. The growth of Gluconobacter oxydans was promoted by Bn and B5 and shortened its delay phase and increased its acid production.更多还原