| 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) |
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| 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) |
| nitrogen equivalent | The nitrogen content of protein; used in calculating the protein breakdown in the body from the nitrogen excreted in the urine, 1 g of nitrogen considered as having originated in 6.25 g of protein catabolised. (05 Mar 2000) |
| nitrogen fixation | <biochemistry> The incorporation of atmospheric nitrogen into ammonia by various bacteria, catalysed by nitrogenase. This is an essential stage in the nitrogen cycle and is the ultimate source of all nitrogen in living organisms. In the sea, the main nitrogen fixers are Cyanobacteria. There are several free living bacteria in soil that fix nitrogen including species of Azotobacter, Clostridium and Klebsiella. Rhizobium only fixes nitrogen when in symbiotic association, in root nodules, with leguminous plants. The oxygen sensitive nitrogenase is protected by plant produced leghaemoglobin and the plant obtains fixed nitrogen from the bacteria. See: Frankia. (18 Nov 1997) |
Synonyms : Isotopes, Nitrogen
Synonyms : Compounds, Nitrogen Mustard, Mustard Compounds, Nitrogen
Synonyms : Oxides, Nitrogen
Synonyms : Radioisotopes, Nitrogen
Synonyms : Vanadium Nitrogenase, Nitrogenase, Vanadium
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| NIH |
Not Invented Here (NIH) is a term used to describe a persistent corporate or institutional culture that either intentionally or unintentionally avoids using previously performed research or knowledge because the research and developed knowledge was not originally executed in-house. ...
Ãâó: en.wikipedia.org/wiki/Nih
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| nitrous oxide |
Nitrous oxide, also known as dinitrogen oxide or dinitrogen monoxide, is a chemical compound with chemical formula N2O. Under room conditions it is a colourless non-flammable gas, with a pleasant slightly sweet odor. It is commonly known as laughing gas due to the exhilarating effects of inhaling it, and because it can cause spontaneous laughter in some users. It is used in surgery and dentistry for its anaesthetic and analgesic effects. ...
Ãâó: en.wikipedia.org/wiki/Nitrous_oxide
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| nihilism |
Nihilism literally means belief in nothing. As a philosophical position, nihilism is the view that the world, and especially human existence, is without meaning, purpose, comprehensible truth, or essential value. It is more often a charge levelled against a particular idea than a position to which someone is overtly subscribed. Movements such as Dada, Deconstructionism, and Punk have been described by various observers as "nihilist". ...
Ãâó: en.wikipedia.org/wiki/Nihilism
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| nit |
The National Invitation Tournament (NIT) is a college basketball tournament played each spring, with its final rounds in New York City at Madison Square Garden. The tournament pre-dates the NCAA tournament by one year; in the tournaments' early years there was often some contention as to which champion was in fact the nation's best collegiate basketball team. ...
Ãâó: en.wikipedia.org/wiki/NIT
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| niche |
The specific role that an organism plays in its ecosystem.
Ãâó: www.geocities.com/easternbirds/Glossary.html
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| NI | mainly nocturnal North American goatsucker |
|---|---|
| NI | a person who likes to be active late at night |
| NI | lingerie consisting of a loose dress designed to be worn in bed by women |
| NI | European songbird noted for its melodious nocturnal song |
| NI | English nurse remembered for her work during the Crimean War (1820-1910) |
| NI | mainly crepuscular or nocturnal nonpasserine birds with mottled grayish-brown plumage and large eyes |
| NI | light (as a candle or small bulb) that burns in a bedroom at night (as for children or invalids) |
| NI | lasting through or extending over the whole night |
| NI | happening every night |
| NI | at the end of each day |
| NI | a terrifying or deeply upsetting dream |
| NI | a situation resembling a terrifying dream |
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