广东11选5走势图

实验室冻干机,如何提高菌种活力
作者:上海那艾 浏览:

实验室冻干机利用发酵,收集酵母菌体,用去离子水清洗三次,然后用含有不同金属离子和冻干保护剂的磷酸盐缓冲液重悬(50 mmol/L,pH 8.0),在经过预处理后,通过冻干机真空冷冻干燥可得到展示 RML 的毕赤酵母全细胞粉。

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   因此而知海藻糖、果糖和山梨醇等物质在冻干过程中能减少酶蛋白的变性,实验室冻干机从而提高该酶的合成活力。与未处理的全细胞酶粉相比,冻干中加入这三种物质后,合成活力分别提高 17%、20.29%和 20.72%。

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