| methyl bromide | <chemical> A volatile, toxic, colourless gas or liquid that is frequently used as a fumigant, it is similar in structure to chloroform. It is known to be a powerful ozone-destroying chemical, but it is broken down by some bacteria, thereis much scientific debate on how much danger methyl bromide poses to the ozone layer. (09 Oct 1997) |
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| methyl-CCNU | A nitrosourea antineoplastic agent resembling carmustine (BCNU) and lomustine (CCNU). Synonym: semustine. (05 Mar 2000) |
| methyl chloride | <chemical> A hydrocarbon used as an industrial solvent. It has been used as an aerosal propellent, as a refrigerant and as a local anaesthetic. Chemical name: Methane, chloro- (12 Dec 1998) |
| methyl chloride transferase | <enzyme> S-adenosylmethionine is methyl donor to chloride, bromide or iodide ions Registry number: EC 2.1.1.- (26 Jun 1999) |
| methyl coenzyme M methylreductase | <enzyme> Crude extracts of methanospirillum hungatii Registry number: EC 1.- Synonym: methylreductase, methyl com methylreductase (26 Jun 1999) |
| methyl coenzyme M reductase | <enzyme> Proposed EC 1.12.99.2 Registry number: EC 1.12.- Synonym: methyl com reductase, mcri gene product (26 Jun 1999) |
| methyl cysteine hydrochloride | Mecysteine hydrochloride;the methyl ester of cysteine hydrochloride; a mucolytic agent. (05 Mar 2000) |
| methyl ethers | A group of compounds that contain the general formula r-och3. (12 Dec 1998) |
| methyl group | A -CH3 group on a larger molecule. A carbon which is single-bonded to three hydrogens, and has one free bond to the rest of the molecule. (09 Oct 1997) |
| methyl hydroxybenzoate | Methylp-hydroxybenzoate;an antifungal preservative. Synonym: methyl hydroxybenzoate. (05 Mar 2000) |
| methyl isobutyl ketone | 4-methyl-2-pentanone;in high concentrations it has narcotic action; in relatively low concentrations it may be irritating to the eyes and mucous membranes. (05 Mar 2000) |
| methyl mercaptan | CH3SH;a product of the degradation of cysteine by intestinal bacteria; it is also reduced to produce methane and H2S. (05 Mar 2000) |
| methyl methacrylate | A thermoplastic material used for denture bases. (05 Mar 2000) |
| methyl methanesulfonate | <chemical> Methanesulfonic acid, methyl ester. An alkylating agent in cancer therapy that may also act as a mutagen by interfering with and causing damage to DNA. Pharmacological action: antineoplastic agent, alkylating, mutagens. Chemical name: Methanesulfonic acid, methyl ester (12 Dec 1998) |
| methyl n-butyl ketone | <chemical> 2-hexanone. An industrial solvent which causes nervous system degeneration. Synonym: mbk. Chemical name: 2-Hexanone (12 Dec 1998) |