Caution in the Use of Liquid Propane for freezing Biological Specimens

@article{Stephenson1954CautionIT,
  title={Caution in the Use of Liquid Propane for freezing Biological Specimens},
  author={Juliette Stephenson},
  journal={Nature},
  year={1954},
  volume={174},
  pages={235-235}
}
ONE of the recent innovations in freezing and drying technique is the use of liquid propane for rapid freezing. This material has explosive possibilities when cooled in liquid nitrogen that many invostigators do not seem to realize. Liquid nitrogen boils at − 195.8° C, liquid oxygen at − 183.0° C. It is common experience that if a vapour trap is cooled with liquid nitrogen and open to the atmosphere, oxygen will condense in it. Since propane molts at − 189.9° C, in the range of temperatures… CONTINUE READING