A substance used to produce very low temperatures.
- ‘A cryogen spray simultaneously cools the skin's surface before, during and after each radio frequency pulse to further protect the epidermis.’
- ‘The first cryogens were liquid air and compressed carbon dioxide snow.’
- ‘They also recommended that a prototype using hydrogen as a combined cryogen and form of energy transport be designed, built and tested at one of the national laboratories.’
- ‘This approach preserves native structure by rapidly freezing the specimen in a thin aqueous layer by plunging into cryogen, without the use of fixatives or stains.’
- ‘The material combination of high strength, good toughness, and weldability should prompt designers to specify it for welded pressure vessels for the storage of cryogens.’
- ‘Accelerators with cryogenics or superconducting magnets use distribution boxes to supply cryogens for the cold devices.’
- ‘After all, a superconductor that is both easy to process and can be cooled using electrical refrigerators, rather than messy cryogens, would find many applications.’
- ‘As the heat from the RF frequency stimulates the collagen, a cryogen spray is used to cool the outer layer of skin to tighten it up, and to prevent any burning effect.’
We take a look at several popular, though confusing, punctuation marks.