| nitrogen oxides | Inorganic oxides that contain nitrogen. (12 Dec 1998) |
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| nitrogen partition | Determination of the distribution of nitrogen in the urine among the various constituents. Synonym: nitrogen distribution. (05 Mar 2000) |
| nitrogen radioisotopes | Unstable isotopes of nitrogen that decay or disintegrate emitting radiation. N atoms with atomic weights 12, 13, 16, 17, and 18 are radioactive nitrogen isotopes. (12 Dec 1998) |
| nitrogen-13 | A cyclotron-produced, positron-emitting radioisotope of nitrogen with a half-life of 9.97 minutes; used in protein metabolism studies and in positron-emission tomography. (05 Mar 2000) |
| nitrogen-14 | The common nitrogen isotope, making up 99.63% of natural nitrogen. (05 Mar 2000) |
| nitrogen-15 | The less common stable nitrogen isotope, making up 0.37% of natural nitrogen. Synonym: heavy nitrogen. (05 Mar 2000) |
| nitrogenase | <enzyme> Nitrogenase is a member of a family of enzymes found in nitrogen fixing bacteria that reduce nitrogen to ammonia (also ethylene to acetylene). (18 Nov 1997) |
| nitrogenase complex | <biochemistry> A system of enzymes used by nitrogen-fixing ATP is present. (09 Oct 1997) |
| nitrogenase reductase | <enzyme> Fe protein component of mo-fe protein nitrogenase in rhodospirillum rubrum; part of the molybdenum nitrogenase which is nifhdk Registry number: EC 1.18.2.- Synonym: nitrogenase iron protein, nitrogenase fe protein, fe protein, nitrogenase, nifh protein, nifh gene product (26 Jun 1999) |
| nitrogenize | <chemistry> To combine, or impregnate, with nitrogen or its compounds. Origin: Nitrogenised; Nitrogenizing. Source: Websters Dictionary (01 Mar 1998) |
| nitrogenous | <chemistry> Of, pertaining to, or resembling, nitrogen; as, a nitrogenous principle; nitrogenous compounds. Nitrogenous foods. See Note under Food. Source: Websters Dictionary (01 Mar 1998) |
| nitrogenous base | <biochemistry> A nitrogen-containing molecule having the chemical properties of a base. (09 Oct 1997) |
| nitrogenous group transferases | <enzyme> Enzymes that catalyze the transfer of nitrogenous groups, primarily amino groups, from a donor, generally an amino acid, to an acceptor, usually a 2-oxoacid. Registry number: EC 2.6 (12 Dec 1998) |
Synonyms : Compounds, Nitrogen Mustard, Mustard Compounds, Nitrogen
Synonyms : Oxides, Nitrogen
Synonyms : Radioisotopes, Nitrogen
Synonyms : Vanadium Nitrogenase, Nitrogenase, Vanadium
Synonyms : Group Transferases, Nitrogenous, Transferases, Nitrogenous Group
| nitrogen fixation |
the assimilation of atmospheric nitrogen by soil bacteria and its release for plant use on the death of the bacteria
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| nitrogen mustard |
a toxic compound resembling mustard gas in structure; important in cancer treatment
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| nitrogen narcosis |
confused or stuporous state caused by high levels of dissolved nitrogen in the blood; "deep-sea divers can suffer nitrogen narcosis from breathing air under high pressure"
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| nitrogenase |
an enzyme of nitrogen-fixing microorganisms that catalyzes the conversion of nitrogen to ammonia
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| nitrogenous |
of or relating to or containing nitrogen
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