| thiosulphuric | <chemistry> Of, pertaining to, or designating, an unstable acid, H2S2O3, analogous to sulphuric acid, and formerly called hyposulphurous acid. Origin: Thio- + sulphuric. Source: Websters Dictionary (01 Mar 1998) |
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| thiotepa | <chemical> A very toxic alkylating antineoplastic agent also used as an insect sterilant. It causes skin, gastrointestinal, CNS, and bone marrow damage. According to the fourth annual report on carcinogens (ntp 85-002, 1985), thiotepa may reasonably be anticipated to be a carcinogen (merck index, 11th ed). Pharmacological action: alkylating agents, antineoplastic agent, alkylating, carcinogens, chemosterilants. Chemical name: Aziridine, 1,1',1''-phosphinothioylidynetris- (12 Dec 1998) |
| thiothixene | <drug> This drug is an antipsychotic agent of the thioxanthene series. It is used to treat schizophrenia and other psychotic disorders. (09 Oct 1997) |
| thiotolene | <chemistry> A colourless oily liquid, C4H3S.CH3, analogous to, and resembling, toluene. Synonym: methyl thiophene. Origin: Thio- + toluene. Source: Websters Dictionary (01 Mar 1998) |
| thiotransacetylase B | <enzyme> An enzyme transferring acetyl from acetyl-CoA to the sulfur atom of thioethanolamine, thus producing coenzyme A and S-acetylthioethanolamine. Synonym: thiotransacetylase B. (05 Mar 2000) |
| thiouracil | <chemical> Occurs in seeds of brassica and crucifera species. Thiouracil has been used as antithyroid, coronary vasodilator, and in congestive heart failure although its use has been largely supplanted by other drugs. It is known to cause blood dyscrasias and suspected of terato- and carcinogenesis. Pharmacological action: antimetabolites, antithyroid agents, vasodilator agents. Chemical name: 4(1H)-Pyrimidinone, 2,3-dihydro-2-thioxo- (12 Dec 1998) |
| thiourea | <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) |
| thiouridine | <chemical> A photoactivable uridine analog that is used as an affinity label. Pharmacological action: affinity labels, antimetabolites. Chemical name: Uridine, 4-thio- (12 Dec 1998) |
| thioxanthene | <pharmacology> A group of medications with antipsychotic activity which act by blocking postsynaptic dopamine receptors in the brain. Examples include: thiothixene, chlorprothixene and flupenthixol. (27 Sep 1997) |
| thioxene | <chemistry> Any one of three possible metameric substances, which are dimethyl derivatives of thiophene, like the xylenes from benzene. Origin: Thiophene + xylene. Source: Websters Dictionary (01 Mar 1998) |
| thioxo- | <prefix> Prefix indicating ==S in a thioketone. (05 Mar 2000) |
| thioxolone | 6-Hydroxy-1,3-benzoxathiol-2-one;an antiseborrheic. (05 Mar 2000) |
| THIP | Alpha-(4,5,6,7-tetrahydroisoxazolo[5,4-c] pyridin-3-ol;an agonist at gamma-aminobutyric acid (GABA) type A receptors. Unlike other agonists of this type, upon systemic administration THIP penetrates the blood-brain barrier and is used as a pharmacological tool to explore GABA receptor function in the brain and spinal cord. (05 Mar 2000) |
| thiphenamil hydrochloride | Diphenylthioacetic acid S-(2-diethylaminoethyl) ester hydrochloride;an anticholinergic drug. (05 Mar 2000) |
| thiram | <chemical> Tetramethylthioperoxydicarbonic diamide. An antifungal agent used in medicine and agriculture. Pharmacological action: antifungal agents, anti-infective agents, local, fungicides, industrial. Chemical name: Thioperoxydicarbonic diamide (((H2N)C(S))2S2), tetramethyl- (12 Dec 1998) |