| tetrathionate hydrolase | <enzyme> From thiobacillus acidophilus; converts tetrathionate into thiosulfate, sulfur, and sulfate; also converts pentathionate Registry number: EC 3.12.1.- (26 Jun 1999) |
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| tetrathionate reductase | <enzyme> Tetrathionate is reduced to thiosulfate Registry number: EC 1.7.- (26 Jun 1999) |
| tetrathionic | <chemistry> Of, pertaining to, or designating, a thionic derivative, HSO, of sulphuric acid, obtained as a colourless, odorless liquid. Origin: Tetra- + thionic. Source: Websters Dictionary (01 Mar 1998) |
| tetrathionic acid | <chemical> Tetrathionic acid (hoso2ssso3h). A sulfuric acid dimer, formed by disulfide linkage. This compound has been used to prolong coagulation time and as an antidote in cyanide poisoning. Pharmacological action: anticoagulant, antidotes, indicators and reagents. Chemical name: Tetrathionic acid (12 Dec 1998) |
| tetratomic | <chemistry> Consisting of four atoms; having four atoms in the molecule, as phosphorus and arsenic. Having a valence of four; quadrivalent; tetravalent; sometimes, in a specific sense, having four hydroxyl groups, whether acid or basic. Origin: Tetra- + atomic. Source: Websters Dictionary (01 Mar 1998) |
| Tetratrichomonas | A genus of parasitic protozoan flagellates, formerly part of the genus Trichomonas but now separated into a distinct genus by the presence of four anterior and one trailing flagella, a pelta, and a disc-shaped parabasal body. See: Trichomonas. Origin: tetra-+ Trichomonas Tetratrichomonas ovis, a species that occurs in the caecum or rumen of domestic sheep. (05 Mar 2000) |
| tetravalence | <chemistry> The quality or state of being tetravalent; quadrivalence. Source: Websters Dictionary (01 Mar 1998) |
| tetravalent | <chemistry> Having a valence of four; tetratomic; quadrivalent. Origin: Tetra- + L. Valens, -entis, p.pr. Source: Websters Dictionary (01 Mar 1998) |
| tetraxile | <zoology> Having four branches diverging at right angles; said of certain spicules of sponges. Origin: Tetra- + axile. Source: Websters Dictionary (01 Mar 1998) |
| tetrazo- | <chemistry, prefix> A combining form (also used adjectively), designating any one of a series of double derivatives of the azo and diazo compounds containing four atoms of nitrogen. (29 Oct 1998) |
| tetrazole | The compound CN4H2 with the structure of tetrazolium. (05 Mar 2000) |
| tetrazolium | Any of a group of organic salts having the general structure which on reduction (cleaving the 2,3 bond) yields a coloured insoluble formazan; used as a reagent in oxidative enzyme histochemistry. Nitroblue tetrazolium (NBT), a pale yellow dye that is converted on reduction to coloured formazans in the histochemical demonstration of dehydrogenases; used in haematology for staining of neutrophils to help indicate the presence of bacterial infections. (05 Mar 2000) |
| tetrazolium salts | <chemical> Quaternary salts derived from tetrazoles. They are used in tests to distinguish between reducing sugars and simple aldehydes, for detection of dehydrogenase in tissues, cells, and bacteria, for determination of corticosteroids, and in colour photography. Pharmacological action: indicators and reagents. (12 Dec 1998) |
| tetrazone | <chemistry> Any one of a certain series of basic compounds containing a chain of four nitrogen atoms; for example, ethyl tetrazone, (C2H5)2N.N2.N(C2H5)2, a colourless liquid having an odour of leeks. Source: Websters Dictionary (01 Mar 1998) |
| tetrazonium salts | Diazonium salt's that contain three azo groups. (05 Mar 2000) |