| 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) |
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| 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) |
| nitroacetophenone reductase | <enzyme> Reduces keto group, requires NADPH Registry number: EC 1.1.1.- (26 Jun 1999) |
| nitroalkane oxidase | <enzyme> Catalyses the conversion of oxygen and nitroalkane to hydrogen peroxide, aldehyde, and nitrite Registry number: EC 1.7.3.- (26 Jun 1999) |
| nitroanisole o-demethylase | <enzyme> Oxidative enzyme which transforms p-nitroanisole into p-nitrophenol. Registry number: EC 1.- (12 Dec 1998) |
| nitroarginine | <chemical> An inhibitor of nitric oxide synthetase which has been shown to prevent glutamate toxicity. Nitroarginine has been experimentally tested for its ability to prevent ammonia toxicity and ammonia-induced alterations in brain energy and ammonia metabolites. (neurochem res 1995:200(4):451-6) Pharmacological action: enzyme inhibitors. (12 Dec 1998) |
| nitrobacter | A genus of gram-negative, rod-shaped bacteria that oxidises nitrites to nitrates. Its organisms occur in aerobic environments where organic matter is being mineralised. (12 Dec 1998) |
| nitrobacteraceae | A family of gram-negative bacteria which derive energy from the oxidation of ammonia to nitrite or nitrite to nitrate. Its organisms are commonly found in soil and fresh water. (12 Dec 1998) |
| nitrobenzene | <chemistry> A yellow aromatic liquid (C6H5.NO2), produced by the action of nitric acid on benzene, and called from its odour imitation oil of bitter almonds, or essence of mirbane. It is used in perfumery, and is manufactured in large quantities in the preparation of aniline. Fornerly Synonym: nitrobenzol. Origin: Nitro- + benzene. Source: Websters Dictionary (01 Mar 1998) |
| nitrobenzoates | Benzoic acid or benzoic acid esters substituted with one or more nitro groups. (12 Dec 1998) |
| nitroblue tetrazolium | <chemical> 3,3'-(3,3'-dimethoxy-4,4'-biphenylene)bis (2-(p-nitrophenyl)-5-phenyl-2h-tetrazolium. Colourless to yellow dye that is reducible to blue or black formazan crystals by certain cells; formerly used to distinguish between nonbacterial and bacterial diseases, the latter causing neutrophils to reduce the dye; used to confirm diagnosis of chronic granulomatous disease. Pharmacological action: indicators and reagents. Chemical name: 2H-Tetrazolium, 3,3'-(3,3'-dimethoxy(1,1'-biphenyl)-4,4'-diyl)bis(2-(4-nitrophenyl)-5-phenyl-, dichloride (12 Dec 1998) |
| nitroblue tetrazolium reduction | <chemical> Nitroblue tetrazolium, a yellow dye, is taken up by phagocytosing neutrophils and reduced to insoluble formazan, which is deep blue, if the metabolic burst is normal. Reduction does not take place in chronic granulomatous disease. (18 Nov 1997) |
| nitroblue tetrazolium test | A test to detect the phagocytic ability of polymorphonuclear leukocytes by measuring the capacity of the oxygen-dependent leukocytic bactericidal system. (05 Mar 2000) |
| nitrocalcite | <chemical> Nitrate of calcium, a substance having a grayish white colour, occuring in efforescences on old walls, and in limestone caves, especially where there exists decaying animal matter. Origin: Nitro- + calcite. Source: Websters Dictionary (01 Mar 1998) |
| nitrocarbol | <chemistry> See Nitromethane. Origin: Nitro- + carbon + L. Oleum oil. Source: Websters Dictionary (01 Mar 1998) |