| nitric-oxide reductase | <enzyme> Prior to 1992 was classified as EC 1.7.99.2; a cytochrome bc complex; genbank af002217 (norb protein) and af002661 (norz protein) are from alcaligenes eutrophus Registry number: EC 1.7.99.7 Synonym: nitric oxide reductase, norb gene product, norz gene product (26 Jun 1999) |
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| nitridation | Formation of nitrides; formation of nitrogen compounds through the action of ammonia (analogous to oxidation). (05 Mar 2000) |
| nitride | <chemistry> A binary compound of nitrogen with a more metallic element or radical; as, boric nitride. Origin: fromNitrogen. Source: Websters Dictionary (01 Mar 1998) |
| nitrification | 1. <chemistry> The act, process, or result of combining with nitrogen or some of its compounds. The act or process of oxidizing nitrogen or its compounds so as to form nitrous or nitric acid. 2. A process of oxidation, in which nitrogenous vegetable and animal matter in the presence of air, moisture, and some basic substances, as lime or alkali carbonate, is converted into nitrates. The process is going on at all times in porous soils and in water contaminated with nitrogenous matter, and is supposed to be due to the presence of an organised ferment or ferments, called nitrification ferments. In former times the process was extensively made use of in the production of saltpeter. Origin: Cf. F. Nitrification. See Nitrify. Source: Websters Dictionary (01 Mar 1998) |
| nitrifier | <chemistry> An agent employed in nitrification. Source: Websters Dictionary (01 Mar 1998) |
| nitrify | <chemistry> To combine or impregnate with nitrogen; to convert, by oxidation, into nitrous or nitric acid; to subject to, or produce by, nitrification. Origin: Niter + -fy: cf. F. Nitrifer. See Niter. Source: Websters Dictionary (01 Mar 1998) |
| nitrile | <chemistry> Any one of a series of cyanogen compounds; particularly, one of those cyanides of alcohol radicals which, by boiling with acids or alkalies, produce a carboxyl acid, with the elimination of the nitrogen as ammonia. The nitriles are named with reference to the acids produced by their decomposition, thus, hydrocyanic acid is formic nitrile, and methyl cyanide is acetic nitrile. See: Nitro-. Source: Websters Dictionary (01 Mar 1998) |
| nitrile hydratase | <enzyme> Converts nitriles to the corresponding amides; has been sequenced; genbank u89363 Registry number: EC 4.2.1.- (26 Jun 1999) |
| nitriles | Organic compounds containing the -cn radical. The concept is distinguished from cyanides, which denotes inorganic salts of hydrogen cyanide. (12 Dec 1998) |
| nitrilo- | <prefix> Prefix indicating a tervalent nitrogen atom attached to three identical groups; e.g., nitrilotriacetic acid, N(CH2COOH)3. (05 Mar 2000) |
| nitrilotriacetate dehydrogenase | <enzyme> From a denitrifying proteobacteria; does not use oxygen; forms iminodiacetate and glyoxylate; requires phenazine methosulfate as electron carrier Registry number: EC 1.7.99.- Synonym: nta dehydrogenase (26 Jun 1999) |
| nitrilotriacetate monooxygenase | <enzyme> Two component monooxygenase; catalyses nitrilotriacetate and NADH to iminodiacetate and glyoxylate and nad in the presence of h and oxygen Registry number: EC 1.14.13.- Synonym: nta monooxygenase (26 Jun 1999) |
| nitrilotriacetic acid | <chemical> Chemical name: Glycine, N,N-bis(carboxymethyl)- (12 Dec 1998) |
| nitrilotriacetic acid monooxygenase | <enzyme> Nadh and o2 required, forms ininodiacetic acid and glyoxylate Registry number: EC 1.7.- (26 Jun 1999) |
| nitrimuriatic acid | An extremely caustic mixture that contains 18 parts nitric acid and 82 parts hydrochloric acid. Synonym: aqua regia, aqua regalis, nitrimuriatic acid. (05 Mar 2000) |