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Method for accessing samples in liquid nitrogen tank

Edit: Henan Tianchi Instrument Equipment Co., Ltd    Date:2019-01-07
Semen can only survive for half a day at room temperature. After the sperm is extracted, it is sent to an ordinary refrigerator and cooled to 4 ° C, and then placed in a freezer to cool down to 25 ° C. The third step is to freeze the semen into a liquid nitrogen tank at 196 ° C.
 
Extraction: The staff wore frost-proof gloves and pumped a container of sperm that had frozen dozens of tubes from the liquid nitrogen tank. A white mist appeared in the storage. After a few seconds, the staff hurriedly put the sperm back into the liquid nitrogen tank.