| thio- | <chemistry, prefix> A combining form (also used adjectively) denoting the presence of sulphur. See Sulpho-. Origin: Gr. Brimstone, sulphur. (29 Oct 1998) |
|---|---|
| thioacetamide | <chemical> Ethanethioamide. Formerly used as a laboratory reagent; it is a potent hepatocarcinogen. Pharmacological action: carcinogens. Chemical name: Ethanethioamide (12 Dec 1998) |
| thioacetazone | <chemical> A thiosaemicarbazone that is used in association with other antimycobacterial agents in the initial and continuation phases of antituberculosis regimens. Thiacetazone containing regimens are less effective than the short-course regimen recommended by the international union against tuberculosis and are used in some developing countries to reduce drug costs. Pharmacological action: antitubercular agents. Chemical name: Acetamide, N-(4-(((aminothioxomethyl)hydrazono)methyl)phenyl)- (12 Dec 1998) |
| thioacid | An organic acid in which one or more of the oxygen atoms have been replaced by sulfur atoms; e.g., thiosulfuric acid. Synonym: sulfacid, sulfoacid. (05 Mar 2000) |
| thioalcohol | <chemistry> Any one of series of compounds, hydrosulphides of alcohol radicals, in composition resembling the alcohols, but containing sulphur in place of oxygen, and hence called also the sulphur alcohols. In general, they are colourless liquids having a strong, repulsive, garlic odour. The name is specifically applied to ethyl mercaptan, C2H5SH. So called from its avidity for mercury, and other metals. Origin: F, fr. NL. Mercurius mercury + L. Captans, p. Pr. Of captare to seize, v. Intens. Fr. Capere. Source: Websters Dictionary (01 Mar 1998) |
| thioamide | An amide in which S replaces O. (05 Mar 2000) |
| thioamides | Organic compounds containing the radical -csnh2. (12 Dec 1998) |
| thioate | A salt or ester of a -thioic acid. (05 Mar 2000) |
| thiobacillus | A genus of gram-negative, rod-shaped bacteria that derives energy from the oxidation of one or more reduced sulfur compounds. Its organisms are widely distributed in marine, freshwater, and soil environments, especially where oxidizable sulfur is abundant. (12 Dec 1998) |
| thiobacillus thiooxidans | A strictly autotrophic bacterium that oxidises sulfur and thiosulfate to sulfuric acid. (12 Dec 1998) |
| thiobarbiturates | Compounds in which one or more of the ketone groups on the pyrimidine ring of barbituric acid are replaced by thione groups. (12 Dec 1998) |
| thiobarbituric acid reactive substances | Low-molecular-weight end products, probably malondialdehyde, that are formed during the decomposition of lipid peroxidation products. These compounds react with thiobarbituric acid to form a fluorescent red adduct. (12 Dec 1998) |
| thiocarbamates | Carbamates in which the -co- group has been replaced by a -cs- group. (12 Dec 1998) |
| thiocarbamide | <chemical> A photographic fixative used also in the manufacture of resins. According to the fourth annual report on carcinogens (ntp 85-002, 1985), this substance may reasonably be anticipated to be a carcinogen (merck index, 9th ed). Many of its derivatives are antithryoid agents and/or free radical scavengers. Pharmacological action: antithyroid agents, carcinogens, free radical scavengers, indicators and reagents. Chemical name: Thiourea (12 Dec 1998) |
| thiocarbonate | <chemistry> A sulphocarbonate. Source: Websters Dictionary (01 Mar 1998) |