The samples stored in liquid nitrogen are YDS series liquid nitrogen biological container tanks, and the quantity is limited to less than 1,000 pieces;
Stored separately from the liquid nitrogen is a stainless steel cryogenic freezer, also called a gas-phase liquid nitrogen tank, with a quantity of more than 10,000 units and centralized storage!
They are both double-gallbladder vacuum insulated storage tanks developed based on sample storage needs and combined with the characteristics of liquid nitrogen. However, one is deactivated after leaving the liquid nitrogen sample, and the other is stored separately from the liquid nitrogen. Everyone knows that the former requires regular replenishment of liquid nitrogen, and the latter is cryopreserved with nitrogen. Does it still require rehydration?
Of course!
You should know that although the stainless steel cryogenic freezer uses the vapor phase to preserve the sample, the vapor phase still comes from the liquid nitrogen in the tank!
Before preparing the cryogenic liquid nitrogen freezer and placing the sample, you need to fill the liquid nitrogen storage area first and evaporate the liquid nitrogen at the bottom. As the evaporated vapor rises, the internal temperature reaches the low temperature required for the sample. Put in the sample. After being put into use, the intelligent system detects that when the upper temperature is higher than the set value, the liquid nitrogen at the bottom will evaporate to provide cooling for the samples in the upper layer.
If you want to continuously stabilize the sample storage temperature, you need a continuous supply of liquid nitrogen! However, the liquid nitrogen storage in the stainless steel cryogenic freezer is limited and will eventually be consumed. Only by replenishing liquid nitrogen on time can long-term sample storage be achieved!
Therefore, the stainless steel cryogenic freezer needs to be replenished with liquid nitrogen!
