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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



... caffeine in coffee would be more correctly stated as 1 1/4 per cent. Theine and caffeine are identical, but theobromine (C{7}H{8}N{4}O{2}) differs from both in the greater proportion of nitrogen which it contains. ...
— The Food of the Gods - A Popular Account of Cocoa • Brandon Head

... compounds less rich in oxygen, and the oxygen that is set free acts upon the fatty acid that it is proposed to treat. A mixture of equal parts of chlorine and steam may be very advantageously employed, as well as anhydrous sulphuric acid and water, or oxygen, anhydrous sulphuric acid and protoxide of nitrogen, nitrogen, oxygen, and hydrogen, protoxide of nitrogen and air, or ...
— Scientific American Supplement, No. 492, June 6, 1885 • Various

... had no cause to fear! Amedee received his degree on the same day with his friend Maurice, and both passed honorably. A little old man with a head like a baboon—the scientific examiner—tried to make Amedee flounder on the subject of nitrogen, but he passed all the same. One can hope ...
— A Romance of Youth, Complete • Francois Coppee

... apparent that our present knowledge of the elements stretches back into history: back to England's Ernest Rutherford, who in 1919 proved that, occasionally, when an alpha particle from radium strikes a nitrogen atom, either a proton or a hydrogen nucleus is ejected; to the Dane Niels Bohr and his 1913 idea of electron orbits; to a once unknown Swiss patent clerk, Albert Einstein, and his now famous theories; to Poland's Marie Curie who, in 1898, with her French husband Pierre laboriously isolated ...
— A Brief History of Element Discovery, Synthesis, and Analysis • Glen W. Watson

... temperature reduced another hundred, the point would be reached at which oxygen gas becomes a vapor, and under increased pressure would be a liquid. Thirty-seven degrees more would bring us to the critical temperature of nitrogen. ...
— A History of Science, Volume 3(of 5) • Henry Smith Williams


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