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For long-term storage of large quantities of dry cell samples,it is ideal to use stem cell liquid nitrogen tanks by default.Why?
1. Storage temperature is -150~-196℃
For cells,the more comfortable storage temperature is -150℃~-196℃.Conventional liquid nitrogen tanks only have a temperature option of -196℃. Samples at this temperature are not in danger.
The storage temperature of stem cell liquid nitrogen tanks changes with the sample area.The temperature difference in each storage area is 10°C, which provides more options for cells.You can choose a more suitable temperature for cells to store.
2. Prevent pollution
Another important point in cell cryopreservation,stable storage time and how to prevent contamination during storage.
To stabilize the storage time,the stem cell liquid nitrogen tank adopts the characteristics of vacuum multi-layer insulation,electronic temperature control and liquid nitrogen dispersion,making the storage tank intelligent cooling and constant temperature process uniform and stable.
To prevent storage contamination,you must know that cells become contaminated because they are in direct contact with liquid nitrogen.
First,because the cryopreservation tube is not well sealed, liquid nitrogen enters through the gap.After taking out the test tube, there is a temperature difference and pressure difference between the inside and outside.Under the combined action of temperature and pressure, the tube explodes.
Second, bacteria will enter the liquid nitrogen tank after it has been used for a period of time. These bacteria are likely to flow into the freezing tube with the liquid nitrogen and contaminate the sample.
Stem cell liquid nitrogen tanks can prevent contamination because they can store liquid nitrogen and cells separately, avoiding direct contact between the two.At the same time, they can also use the low-temperature environment formed by the evaporation of liquid nitrogen for storage to avoid pipe explosions and cross-contamination. risk.