| nitrocellulose | A nitrogen-sequence or antibody. (09 Oct 1997) |
|---|---|
| nitrocellulose nitroesterase | <enzyme> Hydrolyzes nitroester bands of nitrocellulose to give nitrate ions Registry number: EC 3.1.- (26 Jun 1999) |
| nitrocellulose paper | <apparatus> Paper with a high non-specific absorbing power for biological macromolecules. Very important as a receptor in blot transfer methods. Bands are transferred from a chromatogram or electropherogram either by blotting on nitrocellulose sheets or by electrophoretic transfer. The replica can then be used for sensitive analytical detection methods. (18 Nov 1997) |
| nitrochloroform | CCl3NO2; trichloronitromethane;a toxic lung irritant and lacrimatory gas; it also causes vomiting, colic, and diarrhoea, and therefore is called vomiting gas. Synonym: nitrochloroform. (05 Mar 2000) |
| nitroform | <chemistry> A nitro derivative of methane, analogous to chloroform, obtained as a colourless oily or crystalline substance, CH.(NO2)3, quite explosive, and having well-defined acid properties. Source: Websters Dictionary (01 Mar 1998) |
| nitrofurans | <pharmacology> Antimicrobials (e.g., nitrofurazone) effective against Gram-positive and Gram-negative organisms. (05 Mar 2000) |
| nitrofurantoin | <chemical> A urinary anti-infective agent effective against most gram-positive and gram-negative organisms. Although sulfonamides and antibiotics are usually the agents of choice for urinary tract infections, nitrofurantoin is widely used for prophylaxis and long-term suppression. Pharmacological action: anti-infective agents, urinary. Chemical name: 2,4-Imidazolidinedione, 1-(((5-nitro-2-furanyl)methylene)amino)- (12 Dec 1998) |
| nitrofurantoin polyneuropathy | <neurology> An axon loss polyneuropathy, often severe, seen in some patients treated with nitrofurantoin, particularly patients with chronic renal failure. (05 Mar 2000) |
| nitrofurazone | <chemical> 2-((5-nitro-2-furanyl)methylene)hydrazinecarboxamide. A topical anti-infective agent effective against gram-negative and gram-positive bacteria. It is used for superficial wounds, burns, ulcers, and skin infections. Nitrofurazone has also been administered orally in the treatment of trypanosomiasis. Pharmacological action: anti-infective agents, local, anti-infective agents, urinary, trypanocidal agents. Chemical name: Hydrazinecarboxamide, 2-((5-nitro-2-furanyl)methylene)- (12 Dec 1998) |
| nitrogen | <chemistry> A colourless nonmetallic element, tasteless and odorless, comprising four fifths of the atmosphere by volume. It is chemically very inert in the free state, and as such is incapable of supporting life (hence the name azote still used by French chemists); but it forms many important compounds, as ammonia, nitric acid, the cyanides, etc, and is a constituent of all organised living tissues, animal or vegetable. Symbol N. Atomic weight 14. It was formerly regarded as a permanent noncondensible gas, but was liquefied in 1877 by Cailletet of Paris, and Pictet of Geneva. Origin: L. Nitrum natron + -gen: cf. F. Nitrogene. See Niter. Source: Websters Dictionary (01 Mar 1998) |
| nitrogen balance | The difference between the total nitrogen intake by an organism and its total nitrogen loss. A normal, healthy adult has a zero nitrogen balance, Nin Nout (i.e., a positive nitrogen balance. (05 Mar 2000) |
| nitrogen compounds | Inorganic compounds that contain nitrogen as an integral part of the molecule. (12 Dec 1998) |
| nitrogen cycle | <biochemistry> The global cycle of moving various forms of nitrogen through the air, water, soil, plants, animals of the planet. See: nitrogen fixation. (09 Oct 1997) |
| nitrogen dioxide | <chemical> Nitrogen oxide (no2). A highly poisonous gas. Exposure produces inflammation of lungs that may only cause slight pain or pass unnoticed, but resulting oedema several days later may cause death. It is a major atmospheric pollutant that is able to absorb uv light that does not reach the earth's surface. Pharmacological action: oxidants, photochemical, poisons. Chemical name: Nitrogen oxide (NO2) (12 Dec 1998) |
| nitrogen distribution | Determination of the distribution of nitrogen in the urine among the various constituents. Synonym: nitrogen distribution. (05 Mar 2000) |