以糙米为主要原料的富硒酵母发酵动力学研究

Fermentation kinetics of selenium-enriched yeast(Saccharomyces cerevisiae) using brown rice as the major raw material

采用糙米汁、麦芽汁和黄豆芽汁3种天然原料为酵母发酵的培养基,对富硒酵母发酵过程中富硒酵母生长、总硒量、发酵液主要化学成分变化趋势进行了探讨。结果表明:在发酵过程中酵母菌菌体产量、总硒量呈增加趋势,发酵液pH、总糖、还原糖、可溶性蛋白质和游离氨基态氮含量均呈下降趋势。

Extract of germinated brown rice, malt and soybean sprout were used as fermentative medium for selenium-enriched yeast （Saccharomyces cerevisiae） cultivation. On the basis of optimization of culture parameters, the change tendencies of main nutriments and indexes were investigated.The pH value, total sugar, reducing sugar, soluble protein and free amino nitrogen in the substrate showed decreasing tendencies; while biomass yield and total Se yield showed increasing tendencies.