Cryogenics Cryogenics In physics, cryogenics is the production and behaviour of materials at very low temperatures. A person who studies elements that have been subjected to extremely cold temperatures is called a "cryogenicist". It is not well-defined at what point on the temperature scale refrigeration ends and cryogenics begins, but scientists assume a gas to be cryogenic if it can be liquefied at or below . The U.S. National Institute of Standards and Technology has chosen to consider the field of cryogenics as that involving temperatures below . This is a logical dividing line, since the normal boiling points of the
Gender reform in Esperanto prefix in his translation of "Genesis" finished in 1915. This usage has spread, and "vir-" is now widely used as a prefix in the case of animals ("virleono" "male-lion", "virhomo" "male-human"), but as a separate adjective "vira" for professions ("vira kelnero" "male waiter"), with "-viro" now considered archaic, though neither of these conventions is as common as feminine "-ino." Moreover, the prefix "vir-" is idiomatic, as "virbovo" (man-bovine) could still mean either "bull" or "minotaur/cherub"; it is only by convention that it is generally understood to mean "bull", and writers have coined words such as "taŭro" "bull" to bypass the