He described in detail some of the problems associated with distributing electric power with superconductors, which, at that time, required cooling to liquid helium temperatures.

Note that other things, such as air pressure and the helium temperature, can also affect things.

Obviously there is a price to be paid in holding the liquid helium temperatures.

It can also be prepared by irradiating krypton with ultraviolet rays in a fluorine-argon gas mixture at liquid helium temperature.

As we show next, the gravitational waves from likely sources are only detectable if the bar is cooled to liquid helium temperatures.

Several spectroscopic techniques require liquid helium temperatures, making them inappropriate for real-world studies of catalytic processes.

"The resistance of pure mercury at helium temperatures".

Your wife will be stored at liquid helium temperatures, just a few degrees above absolute zero.

They hovered down at liquid helium temperature (Drake's earlier suspicion of liquid nitrogen storage had proved well founded).

It operates in crossed electric and magnetic fields at liquid helium temperatures.