In the process of freeze drying, a dense cell suspension is placed in small vials and is frozen at
A. -60 to -78°C
B. -20 to -30°C
C. -30 to -48°C
D. -48 to -58°C
Answer:A
In the process of freeze drying, a dense cell suspension is placed in small vials and is frozen at
A. -60 to -78°C B. -20 to -30°C C. -30 to -48°C D. -48 to -58°C