| nitriles | Organic compounds containing the -cn radical. The concept is distinguished from cyanides, which denotes inorganic salts of hydrogen cyanide. (12 Dec 1998) |
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| 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) |
| nitrite | <chemistry> A salt of nitrous acid. Amyl nitrite, a yellow oily volatile liquid, used in medicine as a depressant and a vaso-dilator. Its inhalation produces an instantaneous flushing of the face. Origin: Cf. F. Nitrite. See Niter. Source: Websters Dictionary (01 Mar 1998) |
| nitrite dehydrogenase | <enzyme> Nitrobacter enzyme oxidises nitrite to nitrate with reduction of o2 to water by intermolecular oxygen atom transfer; not the same as nitrate reductase Registry number: EC 1.7.3.- (26 Jun 1999) |
| nitrite reductases | <enzyme> A group of enzymes that oxidise diverse nitrogenous substances to yield nitrite. Registry number: EC 1. (12 Dec 1998) |
| nitrites | Salts of nitrous acid or compounds containing the group no2-. The inorganic nitrites of the type mno2 (where m=metal) are all insoluble, except the alkali nitrites. The organic nitrites may be isomeric, but not identical with the corresponding nitro compounds. (12 Dec 1998) |
| nitritoid reaction | A severe reaction resembling that following the administration of nitrites, sometimes following intravenous administration of arsphenamine or other drugs; consists of flushing of the face, oedema of the tongue and lips, vomiting, profuse sweating, a fall in blood pressure, and sometimes death. (05 Mar 2000) |
| nitrituria | The presence of nitrites in the urine, as a result of the action of Escherichia coli, Proteus vulgaris, and other microorganisms that may reduce nitrates. (05 Mar 2000) |
| nitro dye | <chemical> Dye's in which the chromophore is -NO2, which is so acidic that all dyes in this group are of the acid type; important examples in cytoplasmic staining are picric acid and naphthol yellow S. (05 Mar 2000) |
| nitro- | 1. <prefix> A combining form or an adjective denoting the presence of niter. 2. <chemistry> A combining form (used also adjectively) designating certain compounds of nitrogen or of its acids, as nitrohydrochloric, nitrocalcite; also, designating the group or radical NO2, or its compounds, as nitrobenzene. Nitro group, the radical NO2. Synonym: nitroxyl. (29 Oct 1998) |