enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Flash freezing - Wikipedia

    en.wikipedia.org/wiki/Flash_freezing

    Flash freezing. In physics and chemistry, flash freezing is the process whereby objects are rapidly frozen. [1] This is done by subjecting them to cryogenic temperatures, or it can be done through direct contact with liquid nitrogen at −196 °C (−320.8 °F). It is commonly used in the food industry.

  3. Liquid nitrogen - Wikipedia

    en.wikipedia.org/wiki/Liquid_nitrogen

    The temperature of liquid nitrogen can readily be reduced to its freezing point −210 °C (−346 °F; 63 K) by placing it in a vacuum chamber pumped by a vacuum pump. [2] Liquid nitrogen's efficiency as a coolant is limited by the fact that it boils immediately on contact with a warmer object, enveloping the object in an insulating layer of ...

  4. Cryonics - Wikipedia

    en.wikipedia.org/wiki/Cryonics

    The freezing of humans was first scientifically proposed by Michigan professor Robert Ettinger in The Prospect of Immortality (1962). [52] In 1966, the first human body was frozen—though it had been embalmed for two months—by being placed in liquid nitrogen and stored at just above freezing. The middle-aged woman from Los Angeles, whose ...

  5. Cold trap - Wikipedia

    en.wikipedia.org/wiki/Cold_trap

    In vacuum applications, a cold trap is a device that condenses all vapors except the permanent gases (hydrogen, oxygen, and nitrogen) into a liquid or solid. [2][needs update] The most common objective is to prevent vapors being evacuated from an experiment from entering a vacuum pump where they would condense and contaminate it.

  6. Cryopreservation - Wikipedia

    en.wikipedia.org/wiki/Cryopreservation

    Cryogenically preserved samples being removed from a dewar of liquid nitrogen. Cryopreservation or cryoconservation is a process where biological material - cells, tissues, or organs - are frozen to preserve the material for an extended period of time. [ 1 ] At low temperatures (typically −80 °C (−112 °F) or −196 °C (−321 °F) using ...

  7. Cryofixation - Wikipedia

    en.wikipedia.org/wiki/Cryofixation

    Typically, a sample is plunged into liquid nitrogen or into liquid ethane or liquid propane in a container cooled by liquid nitrogen. The ultimate objective is to freeze the specimen so rapidly (at 10 4 to 10 6 K per second) that ice crystals are unable to form, or are prevented from growing big enough to cause damage to the specimen's ...

  8. Degassing - Wikipedia

    en.wikipedia.org/wiki/Degassing

    Degassing, also known as degasification, is the removal of dissolved gases from liquids, especially water or aqueous solutions. There are numerous methods for removing gases from liquids. Gases are removed for various reasons. Chemists remove gases from solvents when the compounds they are working on are possibly air- or oxygen-sensitive (air ...

  9. Cryogenics - Wikipedia

    en.wikipedia.org/wiki/Cryogenics

    Nitrogen is a liquid under −195.8 °C (77.3 K).. In physics, cryogenics is the production and behaviour of materials at very low temperatures.. The 13th International Institute of Refrigeration's (IIR) International Congress of Refrigeration (held in Washington DC in 1971) endorsed a universal definition of "cryogenics" and "cryogenic" by accepting a threshold of 120 K (−153 °C) to ...