46、超低温保存（cryopreservation ）：也叫冷冻保存（freeze preservation ），一般以液态氮（-196℃）为冷源， 使温度维持在-196℃。在如此低温下，新陈代谢活动基本停止，处于“生机停顿”状态。
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embryo freeze preservation 胚胎冷冻保存
freeze preservation thawing 冷冻保存融解
freeze-drying preservation 冷冻干燥保藏法 ; 冷冻干燥保存
freeze-dry preservation 冷冻干燥保藏
freeze drying preservation 冷冻干燥保存
The effect of variety preservation methods were compared, and the experiments show that using the freeze dry method to long-term preserve caproic acid bacteria is better.
比较了己酸菌不同保存方式的保藏效果，实验表明采用冷冻干燥保藏法长期保藏菌种效果良好。
As freeze drying (lyophilization) preservation has many significant virtues than many other long-term preservation methods, it has become one new research hotpot of long-term preservation of cells.
由于冷冻干燥法具有其他长期保存法无法比拟的一些优点，该方法己成为细胞长期保存方法中新的研究热点。
Conclusion the liquid nitrogen rapid freeze method is the best anti-ice crystal mation method for section preservation.
结论低温骤冷法是这三种防冰晶法中最利于保存切片的方法。
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