Liquid nitrogen

Liquid nitrogen is nitrogen at a very low temperature. It is usually produced by a process known as fractional distillation of air. At atmospheric pressure (normal pressure) nitrogen boils at −196 °C  (77 K; −321 °F).
Nitrogen was first made into a liquid at Jagiellonian University on 15 April 1883. Zygmunt Wróblewski and Karol Olszewski were the first scientists to liquefy nitrogen, oxygen and carbon dioxide.Cryosurgery: A Practical Manual, ed. Paola Pasquali (Berlin; Heidelberg: Springer Berlin Heidelberg, 2015), p. 7 During World War II the production of liquid nitrogen became common.Ebbe Almqvist, History of Industrial Gases (New York; London: Kluwer Academic/Plenum Publishers, 2003), p. 423 This lowered the cost to produce it. After the war new uses were found for liquid gases. Liquid nitrogen became a major gas in the US.

Uses
Liquid nitrogen has a variety of uses, as it is easy to transport, and compact.
 Removal of warts
In Cryosurgery
 Storage and preservation of cells
 Shrink welding
 In food preparation, for foods such as ice cream
To cool electronics, such as infrared sensors
 In Cryogenics

 References 

Category:Nitrogen