Assertion: liquid helium | /r/ObjectUse | used as cryogenic refrigerant
Facets:
value: in more recent decades
type: TEMPORAL
Source sentences:
text: In more recent decades, liquid helium has been used as a cryogenic refrigerant (which is used in cryocoolers), and liquid helium is produced commercially for use in superconducting magnets such as those used in magnetic resonance imaging (MRI), nuclear magnetic resonance (NMR), Magnetoencephalography (MEG), and experiments in physics, such as low temperature Mössbauer spectroscopy.