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cryogenics
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cryogenics Article

cryogenics summary

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Below is the article summary. For the full article, see cryogenics.

cryogenics , Study and use of low-temperature phenomena. The cryogenic temperature range is from −238°F (−150°C) to absolute zero. At low temperatures, matter has unusual properties. Substances that are naturally gases can be liquefied at low temperatures, and metals lose electrical resistance as they get colder (see superconductivity). Cryogenics dates from 1877, when oxygen was first cooled to the point at which it became a liquid (−297°F, or −183°C); superconductivity was discovered in 1911. Applications of cryogenics include the storage and transport of liquefied gases, food preservation, cryosurgery, rocket fuels, and superconducting electromagnets.

refrigeration Summary
Refrigeration, the process of removing heat from an enclosed space or from a substance for the purpose of lowering the temperature. In the industrialized nations and affluent regions in the developing world, refrigeration is chiefly used to store foodstuffs at low temperatures, thus inhibiting the