Effect of freeze-thaw repetitions upon the supercooling release ability of ice-nucleating bacteria.
We have studied the durability of ice-nucleating bacteria with a potent supercooling release capacity through repeated freeze-thaw cycles. Through experiment, we confirmed that UV sterilized Erwinia ananas maintains a superior supercooling release capacity at around -1 degrees C through 2000 freeze-thaw cycles. We also found that gamma-ray sterilization, which is more suitable than UV for large-scale sterilization treatment, has a similar effect at appropriately selected doses.
Tsuchiya
Yooko
Y
Energy & Mechanical Engineering Department, Central Research Institute of Electric Power Industry, 2-6-1 Nagasaka, Yokosuka, Kanagawa 240-0196, Japan. yooko@criepi.denken.or.jp
Sasaki
Kazuhiro
K
Hasegawa
Hiromi
H