liquid nitrogen

Thân thiện

A scientist carefully pours liquid nitrogen into a beaker.

Definition

1. Noun:
   • Nitrogen in a liquid state: A cryogenic fluid where the element nitrogen exists in a liquid form, produced by cooling nitrogen gas to an extremely low temperature.

Usage

• Noun:
  • Liquid nitrogen is used as a primary example of a cryogenic substance. It is commonly employed in scientific, medical, and industrial contexts for its extremely cold temperature.
  • It is typically stored in specialized insulated containers called Dewar flasks to minimize evaporation.

Examples

• Noun:
  • The laboratory uses liquid nitrogen to flash-freeze biological samples.
  • Liquid nitrogen boils at -196 degrees Celsius at atmospheric pressure.
  • Handling liquid nitrogen requires proper safety equipment like gloves and face shields.

Advanced Usage

• "To be stored in liquid nitrogen": Refers to the long-term preservation of materials, such as cells, tissues, or genetic samples, by submerging them in this cryogenic fluid.
  • The sperm sample was stored in liquid nitrogen for future use.

Variants and Related Words

• Cryogen (n): A general term for a substance, like liquid nitrogen, used to produce very low temperatures.
• Nitrogen (n): The gaseous chemical element (N₂) from which the liquid form is derived.
• Cryogenic (adj): Relating to or involving very low temperatures.

Synonyms

• Cryogenic fluid: A substance used for its extremely low-temperature properties.
• LN₂: A common abbreviation used in scientific and technical contexts.

Notes on Meaning

• The term liquid nitrogen refers specifically to the physical state of the element nitrogen. It is not a different chemical compound but nitrogen (N₂) in a different phase.
• Its primary defining property is its extremely low boiling point, which makes it invaluable for creating freezing environments, preserving perishable items, and in various cooling applications.

Học thuật

Noun

1. nitrogen in a liquid state