In the process of freeze drying, a dense cell suspension is placed in small vials and is frozen at

In the process of freeze drying, a dense cell suspension is placed in small vials and is frozen at

Q. In the process of freeze drying, a dense cell suspension is placed in small vials and is frozen at

  1. -60 to -78°C
  2. -20 to -30°C
  3. -30 to -48°C
  4. -48 to -58°C

Answer: -60 to -78°C

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