| Nicolas-Favre disease | A venereal infection usually caused by Chlamydia trachomatis, and characterised by a transient genital ulcer and inguinal adenopathy in the male; in the female, perirectal lymph nodes are involved and rectal stricture is a common occurrence. Synonym: climatic bubo, Favre-Durand-Nicholas disease, lymphogranuloma inguinale, Nicolas-Favre disease, sixth venereal disease, tropical bubo. (05 Mar 2000) |
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| Nicolle | J.H., French microbiologist and Nobel laureate, 1866-1936. See: Nicolle's white mycetoma, Nicolle's stain for capsules. (05 Mar 2000) |
| Nicolle's stain | <technique> For capsules, stain in a mixture of a saturated solution of gentian violet in alcohol-phenol. (05 Mar 2000) |
| Nicolle's white mycetoma | Mycetoma caused by a species of Aspergillus, and producing relatively large granules, about the size of a pea; infection occurs from barley grain. (05 Mar 2000) |
| nicotian | <botany> A genus of American and Asiatic solanaceous herbs, with viscid foliage and funnel-shaped blossoms. Several species yield tobacco. See Tobacco. Origin: NL. See Nicotian. Source: Websters Dictionary (01 Mar 1998) |
| nicotianine | <chemistry> A white waxy substance having a hot, bitter taste, extracted from tobacco leaves and Synonym: tobacco camphor. Origin: F. Nicotianine. See Nicotian. Source: Websters Dictionary (01 Mar 1998) |
| nicotic | <chemistry> Nicotinic. Source: Websters Dictionary (01 Mar 1998) |
| nicotidine | <chemistry> A complex, oily, nitrogenous base, isomeric with nicotine, and obtained by the reduction of certain derivatives of the pyridine group. Origin: Nicotine + pyridine. Source: Websters Dictionary (01 Mar 1998) |
| nicotinamidase | <enzyme> An enzyme that catalyses the hydrolysis of nicotinamide to nicotinate and ammonia. Chemical name: Nicotinamide amidohydrolase Registry number: EC 3.5.1.19 (12 Dec 1998) |
| nicotinamide | <biochemistry> Member of the water soluble B vitamin group, used in the production of fatty acids, steroids and cholesterol, deficiency is known as pellagra. Has cholesterol-lowering and vasodilating properties. (27 Sep 1997) |
| nicotinamide adenine dinucleotide | <enzyme> Coenzymes that act as electron and hydrogen carriers in some oxidation-reduction reactions. (09 Oct 1997) |
| nicotinamide adenine dinucleotide phosphate | See: NADP. (18 Nov 1997) |
| nicotinamide methyltransferase | <enzyme> Catalyses reversibly the methylation of nicotinamide in the presence of s-adenosylmethionine to yield 1-methylnicotinamide and s-adenosylhomocysteine Registry number: EC 2.1.1.1 Synonym: nicotinamide methylase, nicotinamide-s-adenosylmethionine methyltransferase (26 Jun 1999) |
| nicotinamide mononucleotide | <chemical> 3-carbamoyl-1-beta-d-ribofuranosyl pyridinium hydroxide-5'phosphate, inner salt. A nucleotide in which the nitrogenous base, nicotinamide, is in beta-n-glycosidic linkage with the c-1 position of d-ribose. Synonym: nicotinamide ribonucleotide; nmn. Chemical name: Pyridinium, 3-(aminocarbonyl)-1-(5-O-phosphono-beta-D-ribofuranosyl)-, inner salt (12 Dec 1998) |
| nicotinamide phosphoribosyltransferase | <enzyme> Utilises nicotinamide, mg(2+), prpp and ATP Registry number: EC 2.4.2.12 Synonym: nmn pyrophosphorylase (26 Jun 1999) |