| methallibure | <chemical> 1-methyl-6-(1-methylallyl)-2,5-dithiobiurea. A dithiobiurea compound with anti-gonadotropic activity. Pharmacological action: hormone antagonists. Chemical name: 1,2-Hydrazinedicarbothioamide, N-methyl-N'-(1-methyl-2-propenyl)- (12 Dec 1998) |
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| methamphetamine | <chemical> A central nervous system stimulant and sympathomimetic with actions and uses similar to dextroamphetamine. The smokable form is a drug of abuse and is referred to as crank, crystal, crystal meth, ice, and speed. Pharmacological action: adrenergic agents, adrenergic uptake inhibitors, appetite depressants, central nervous system stimulants, dopamine agents, dopamine uptake inhibitors, sympathomimetic. Chemical name: Benzeneethanamine, N,alpha-dimethyl-, (S)- (12 Dec 1998) |
| methamphetamine base | A form of methamphetamine that can be readily volatilised. (05 Mar 2000) |
| methamphetamine hydrochloride | D-Desoxyephedrine hydrochloride; d-N,alpha-dimethylphenethylamine hydrochloride, "speed";a sympathomimetic agent that exerts greater stimulating effects upon the central nervous system than does amphetamine; widely used by drug abusers via the oral and intravenous ("mainlining") routes; strong psychic dependence may develop. Synonym: methylamphetamine hydrochloride. (05 Mar 2000) |
| methampyrone | <chemical> ((2,3-dihydro-1,5-dimethyl-3-oxo-2-phenyl-1h-pyrazol-4-yl)methylamino)methanesulfonic acid. A drug that has analgesic, anti-inflammatory, and antipyretic properties. It is the sodium sulfonate of aminopyrine. Because of the risk of serious adverse effects its use is justified only in serious situations where no alternative is available or suitable. Pharmacological action: non-steroidal anti-inflammatory agents. Chemical name: Methanesulfonic acid, ((2,3-dihydro-1,5-dimethyl-3-oxo-2-phenyl-1H-pyrazol-4-yl)methylamino)-, sodium salt (12 Dec 1998) |
| methandienone | <chemical> A synthetic steroid with anabolic properties that are more pronounced than its androgenic effects. It has little progestational activity. Pharmacological action: anabolic steroids. Chemical name: Androsta-1,4-dien-3-one, 17-hydroxy-17-methyl-, (17beta)- (12 Dec 1998) |
| methandriol | <chemical> A synthetic steroid with anabolic and androgenic properties. Pharmacological action: anabolic steroids. Chemical name: Androst-5-ene-3,17-diol, 17-methyl-, (3beta,17beta)- (12 Dec 1998) |
| methandrostenolone | <chemical> A synthetic steroid with anabolic properties that are more pronounced than its androgenic effects. It has little progestational activity. Pharmacological action: anabolic steroids. Chemical name: Androsta-1,4-dien-3-one, 17-hydroxy-17-methyl-, (17beta)- (12 Dec 1998) |
| methane | <chemistry> A light, colourless, gaseous, inflammable hydrocarbon, CH4; marsh gas. See Marsh gas, under Gas. <chemistry> Methane series, a series of saturated hydrocarbons, of which methane is the first member and type, and (because of their general chemical inertness and indifference) called also the paraffin (little affinity) series. The lightest members are gases, as methane, ethane; intermediate members are liquids, as hexane, heptane, etc. (found in benzine, kerosene, etc); while the highest members are white, waxy, or fatty solids, as paraffin proper. Source: Websters Dictionary (01 Mar 1998) |
| methane monooxygenase | <enzyme> Mmoc encodes protein c of soluble methane monooxygenase (smmo); pmmo (membrane-associated methane monooxygenase) contains 4 moles of nonheme iron and 1 mole of copper per mole enzyme complex Registry number: EC 1.14.13.25 Synonym: methane monooxygenase component a, methane monooxygenase component c, methane monooxygenase hydroxylase, mmoc gene product, pmmo gene product (26 Jun 1999) |
| methanesulfonic acid monooxygenase | <enzyme> Catalyses conversion of methanesulfonic acid to formaldehyde and sulfite; requires NADH; consists of a, b, and c components; component c is an iron-sulfur protein Registry number: EC 1.14.13.- Synonym: msa monooxygenase, msmc component (26 Jun 1999) |
| methanobacteriaceae | A family of anaerobic, coccoid to rod-shaped methanobacteriales. Cell membranes are composed mainly of polyisoprenoid hydrocarbons ether-linked to glycerol. Its organisms are found in anaerobic habitats throughout nature. (12 Dec 1998) |
| methanobacteriales | An order of anaerobic, coccoid to rod-shaped methanogens, in the kingdom euryarchaeota. They are nonmotile, do not catabolise carbohydrates, proteinaceous material, or organic compounds other than formate or carbon monoxide, and are widely distributed in nature. (12 Dec 1998) |
| Methanobacterium | <bacteria> A genus of strictly anaerobic bacteria that reduce carbon dioxide using molecular hydrogen, H2, to give methane. They show a number of features that distinguish them from other bacteria and are now classified as a separate group, the Archaebacteria. Methanobacteria are found in the anaerobic sediment at the bottom of ponds and marshes (hence marsh gas is the common name for methane) and as part of the microflora of the rumen in cattle and other herbivorous mammals. (18 Nov 1997) |
| methanochondrion | <plant biology> A structure of involuted plasma membrane found in many methanogenic bacteria and thought to be an organelle of methane formation. (18 Nov 1997) |