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Nitrogen   /nˈaɪtrədʒən/   Listen
noun
Nitrogen  n.  (Chem.) A colorless nonmetallic element of atomic number 7, tasteless and odorless, comprising four fifths of the atmosphere by volume in the form of molecular nitrogen (N2). It is chemically very inert in the free state, and as such is incapable of supporting life (hence the name azote still used by French chemists); but it forms many important compounds, such as ammonia, nitric acid, the cyanides, etc, and is a constituent of all organized living tissues, animal or vegetable. Symbol N. Atomic weight 14.007. It was formerly regarded as a permanent noncondensible gas, but was liquefied in 1877 by Cailletet of Paris, and Pictet of Geneva, and boils at -195.8 ° C at atmospheric pressure. Liquid nitrogen is used as a refrigerant to store delicate materials, such as bacteria, cells, and other biological materials.






Collaborative International Dictionary of English 0.48








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"Nitrogen" Quotes from Famous Books



... not for the things in the air, the oxygen, the nitrogen and other gases, about which you are too young to understand now, we could not live grow, and neither could plants. Plants also have to have water to drink, as we do, and food to eat, only they eat the things found in the dirt, and we can not do that. At least not until they are changed into ...
— Daddy Takes Us to the Garden - The Daddy Series for Little Folks • Howard R. Garis

... subtitle: (1) Ammonium nitrate.—The term "ammonium nitrate'' means— (A) solid ammonium nitrate that is chiefly the ammonium salt of nitric acid and contains not less than 33 percent nitrogen by weight; and (B) any mixture containing a percentage of ammonium nitrate that is equal to or greater than the percentage determined by the Secretary under section 899B(b). (2) Ammonium nitrate ...
— Homeland Security Act of 2002 - Updated Through October 14, 2008 • Committee on Homeland Security, U.S. House of Representatives

... principal materials that produce flourishment are carbon, hydrogen, oxygen, phosphorus, potassium, nitrogen, sulphur, calcium, iron and magnesium; protoplasm contains everything; chemists have not been able to determine and classify protoplasm. (See Chap. ...
— ABC's of Science • Charles Oliver

... breathe. Could a person live if he were shut up in an air-tight room for a long time? Fresh air is necessary to life. The teacher may explain that it is the oxygen in the air that supports life. Air is composed one-fifth of this gas and four-fifths of nitrogen. The gases are mixed and the nitrogen simply dilutes the ...
— Outlines of Lessons in Botany, Part I; From Seed to Leaf • Jane H. Newell

... yet been investigated, the substance of this germ has a peculiar chemical composition, consisting of at fewest four elementary bodies, viz., carbon, hydrogen, oxygen, and nitrogen, united into the ill-defined compound known as protein, and associated with much water, and very generally, if not always, with sulphur and phosphorus in minute proportions. Moreover, up to the present time, protein is known ...
— Darwiniana • Thomas Henry Huxley


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