Objective To obtain mutant strains of high production of pullulan and low secretion of pigment and optimize fermentation process of pullulan.
目的获取普鲁兰糖产量高且色素分泌少的突变菌株，优化普鲁兰糖的发酵工艺。
The optimal fermentation medium and conditions of mutant strain NAF-032 with a higher and stable yield of L-lactic acid were studied by orthogonal design theory.
运用正交试验设计理论，对高产L-乳酸突变株NAF-032的最佳摇瓶发酵条件进行了研究，确定了最佳的发酵培养基和发酵条件。
The main research contents included the influence of SO_2 on the flavor stability of beer, the breeding of strain moderately producing SO_2, beer fermentation and genetic substance analysis of mutant.
研究内容包括二氧化硫对啤酒风味稳定性的影响、适量高产二氧化硫啤酒酵母的选育、啤酒发酵试验和突变菌株遗传物质分析。
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