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1. the time in -80c, depends on the cryo-vial and temperature decreasing rate. if the temperature decreasing at -1C per minute, eg, Bicell. it would be more than enough to keep cells in -80 for 4hours. To cryopreserve cells for a short time,1-3 mon, you can just leave it in -80c
& ]& Y8 c+ H* O) ]( m8 q6 r2. For longterm preservation, it is better to transfer your cells into LN2
c6 W/ F$ E% _0 N3. Overnight in -80, it is just for the work convinience.
( W, H, m. d; I1 ]$ S
* l1 k% h; q$ H" W$ ~; W# Z) \- O' U$ U1 t
过夜是为了好安排工作,-80 放4小时就可以 |
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