They could be immensely valuable to power industries because they lose their resistance to electricity when cooled to the relatively high temperature of liquid nitrogen -LRB--196 °C), which is cheap and readily available. (newscientist.com)
First, engineers reduce the volume of the gas by cooling it to the temperature of liquid nitrogen (196 degrees C), which is easier to attain than liquid - hydrogen temperatures. (scientificamerican.com)
The traditional method requires the sequential addition of cryoprotectants over a series of 10 to 20 minutes and then an approximately two hour process that cools the cells at about 0.3 to two degrees a minute down to -196 degrees Celsius, which is the temperature of liquid nitrogen. (scientificamerican.com)