| nitrophenol reductase | <enzyme> Catalyses the conversion of 2,4-dinitrophenol to 2-amino-4-nitrophenol Registry number: EC 1.6.6.- (26 Jun 1999) |
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| nitrophenylgalactosides | <chemical> Includes ortho-, meta-, and para-nitrophenylgalactosides. Chemical name: beta-D-Galactopyranoside, nitrophenyl (12 Dec 1998) |
| nitrophenylsulfenyl | O2N-C6H4-S-; Nitrophenylthio;a radical easily attached to amino groups; used in peptide synthesis and protein chemistry. (05 Mar 2000) |
| nitrophnol | <chemistry> Any one of a series of nitro derivatives of phenol. They are yellow oily or crystalline substances and have well-defined acid properties, as picric acid. Origin: Nitro- + phenol. Source: Websters Dictionary (01 Mar 1998) |
| nitroprussic | <chemistry> Pertaining to, derived from, or designating, a complex acid called nitroprussic acid, obtained indirectly by the action of nitric acid on potassium ferrocyanide (yellow prussiate), as a red crystalline unstable substance. It forms salts called nitroprussides, which give a rich purple colour with alkaline subphides. Origin: Nitro- + prussic Source: Websters Dictionary (01 Mar 1998) |
| nitroprusside | <chemical> (oc-6-22)-pentakis(cyano-c)nitrosoferrate(2-). A powerful vasodilator used in emergencies to lower blood pressure or to improve cardiac function. It is also an indicator for free sulfhydryl groups in proteins. Pharmacological action: antihypertensive agents, indicators and reagents, sulfhydryl reagents, vasodilator agents. Chemical name: Ferrate(2-), pentakis(cyano-C)nitrosyl-, (OC-6-22)- (12 Dec 1998) |
| nitroprusside test | A qualitative test for cystinuria; following the addition of sodium cyanide to the urine, the further addition of nitroprusside produces a red-purple colour if the cyanide has reduced any cystine present to cysteine. (05 Mar 2000) |
| nitroquinol | <chemistry> A hypothetical nitro derivative of quinol or hydroquinone, not known in the free state, but forming a well defined series of derivatives. Origin: Nitro- + quine + -ol. Source: Websters Dictionary (01 Mar 1998) |
| nitroquinolines | Quinolines substituted in any position by one or more nitro groups. (12 Dec 1998) |
| nitroreductases | <enzyme> Enzymes which reduce nitro groups. A variety of compounds can act as acceptors. If NADH or NADPH are the acceptors, the enzymes are classified as EC 1.6.6.- . Registry number: EC 1.7.- (12 Dec 1998) |
| nitrosalicylic | <chemistry> Of, pertaining to, or designating, a nitro derivative of salicylic acid, Synonym: anilic acid. Origin: Nitro- + salicylic. Source: Websters Dictionary (01 Mar 1998) |
| nitrosamine | <biochemistry> These molecules contain the N N=O group (N nitrosamines): many are carcinogens or suspected carcinogens. (18 Nov 1997) |
| nitrosamines | <chemical> A class of compounds that contain a -nh2 and a -no radical. Many members of this group have carcinogenic and mutagenic properties. Pharmacological action: carcinogens. (12 Dec 1998) |
| nitrosation | Conversion into nitroso compounds. An example is the reaction of nitrites with amino compounds to form carcinogenic n-nitrosamines. (12 Dec 1998) |
| nitrose | <chemistry> See Nitrous. Source: Websters Dictionary (01 Mar 1998) |