What is the use of liquid nitrogen?
Answers
Answer:
Liquid nitrogen, which has a boiling point of -196C, is used for a variety of things, such as a coolant for computers, in medicine to remove unwanted skin, warts and pre-cancerous cells, and in cryogenics, where scientists study the effect of very cold temperatures on materials.
Explanation:
in cryotherapy for removing unsightly or potentially malignant skin lesions such as warts and actinic keratosis
to store cells at low temperature for laboratory work
in cryogenics
in a cryophorus to demonstrate rapid freezing by evaporation
as a backup nitrogen source in hypoxic air fire prevention systems
as a source of very dry nitrogen gas
for the immersion, freezing, and transportation of food products
for the cryopreservation of blood, reproductive cells (sperm and egg), and other biological samples and materials
to preserve tissue samples from surgical excisions for future studies
to facilitate cryoconservation of animal genetic resources
to freeze water and oil pipes in order to work on them in situations where a valve is not available to block fluid flow to the work area; this method is known as a cryogenic isolation
for cryonic preservation in hopes of future reanimation
to shrink-weld machinery parts together
as a coolant
for CCD cameras in astronomy
for a high-temperature superconductor to a temperature sufficient to achieve superconductivity
to maintain a low temperature around the primary liquid helium cooling system of high-field superconducting magnets used in e.g. nuclear magnetic resonance spectrometers and magnetic resonance imaging systems
for vacuum pump traps and in controlled-evaporation processes in chemistry
as a component of cooling baths used for very low temperature reactions in chemistry
to increase the sensitivity of infrared homing seeker heads of missiles such as the Strela 3
to temporarily shrink mechanical components during machine assembly and allow improved interference fits
for computers and extreme overclocking[4]
for simulation of space background in vacuum chamber during spacecraft thermal testing[5]
in food preparation, such as for making ultra-smooth ice cream.[6] See also molecular gastronomy.
in container inerting and pressurisation by injecting a controlled amount of liquid nitrogen just prior to sealing or capping[7][8]
as a cosmetic novelty giving a smoky, bubbling "cauldron effect" to drinks. See liquid nitrogen cocktail.
as an energy storage medium[9][10]