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.[1] During World War II the production of liquid nitrogen became common.[2] 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.[2]
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
Liquid Nitrogen Media
A demonstration of liquid nitrogen at the Freeside maker space in Atlanta, Georgia during the Online News Association conference in 2013
Filling a liquid nitrogen Dewar from a storage tank
