| successive contrast | The visual effect caused by viewing a brightly coloured object and then a gray surface; the latter appears tinged with the complementary colour of the object. Viewing a surface coloured in the complementary colour of the object rather than in gray enhances the colour intensity of the surface. (05 Mar 2000) |
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| succimer | <chemical> A mercaptodicarboxylic acid used as an antidote to heavy metal poisoning because it forms strong chelates with them. Pharmacological action: antidotes, chelating agents. Chemical name: Butanedioic acid, 2,3-dimercapto-, (R*,S*)- (12 Dec 1998) |
| succinamate | <chemistry> A salt of succinamic acid. Source: Websters Dictionary (01 Mar 1998) |
| succinamic | <chemistry> Of, pertaining to, or designating, an acid amide derivative of succinic acid, obtained as a white crystalline substance, and forming a series of salts. Source: Websters Dictionary (01 Mar 1998) |
| succinate | Intermediate of the tricarboxylic acid cycle and glyoxylate cycle. (18 Nov 1997) |
| succinate cytochrome c oxidoreductase | <enzyme> A portion of the electron transport chain, catalyzing the transfer of electrons from succinate to cytochrome c via fad, ubiquinone, and cytochrome b. The first step is catalyzed by succinate dehydrogenase (ec 1.3.99.1), the other steps are not well characterised. Registry number: EC 1.- (12 Dec 1998) |
| succinate dehydrogenase | <enzyme> Registry number: EC 1.3.99.1 (12 Dec 1998) |
| succinate oxidase | <enzyme> Not the same as succinate dehydrogenase; involved in electron transport with succinate as substrate Registry number: EC 1.- Synonym: succinoxidase (26 Jun 1999) |
| succinate saemialdehyde | -OOC-CH2-CH2-CHO;an intermediate in the catabolism of gamma-aminobutyrate. Succinate saemialdehyde dehydrogenase, an enzyme that catalyses the reaction of succinate saemialdehyde and either NAD+ or NADP+ to form succinate and NADH (or NADPH); a deficiency of this enzyme is associated with 4-hydroxybutyric aciduria. (05 Mar 2000) |
| succinate saemialdehyde reductase | <enzyme> Nadp dependent Registry number: EC 1.1.1.- Synonym: sucinate saemialdehyde reductase (nadp) (26 Jun 1999) |
| succinate-CoA ligases | <enzyme> Enzymes that catalyze the first step leading to the oxidation of succinic acid by the reversible formation of succinyl-CoA from succinate and CoA with the concomitant cleavage of ATP to ADP (ec 6.2.1.5) or GTP to GDP (ec 6.2.1.4) and orthophosphate. Itaconate can act instead of succinate and itp instead of GTP.ec 6.2.1.-. Chemical name: Succinate:CoA ligase (GDP- or ADP-forming) Registry number: EC 6.2.1.- (12 Dec 1998) |
| succinates | The salts and esters of succinic acid and its derivatives. (12 Dec 1998) |
| succinic | <chemistry> Pertaining to, or derived from, amber; specif, designating a dibasic acid, CH.(COH), first obtained by the dry distillation of amber. It is found in a number of plants, as in lettuce and wormwood, and is also produced artificially as a white crystalline substance having a slightly acid taste. Origin: Cf. F. Succinique. See Succinate. Source: Websters Dictionary (01 Mar 1998) |
| succinic acid | <chemical> A water-soluble, colourless crystal with an acid taste that is used as a chemical intermediate, in medicine, the manufacture of lacquers, and to make perfume esters. It is also used in foods as a sequestrant, buffer, and a neutralizing agent. Pharmacological action: anti-ulcer agents, radiation-protective agents. (12 Dec 1998) |
| succinic acid cycle | A series of oxidation reduction reactions in which succinic acid and other 4-carbon atoms acids (fumaric, malic, oxaloacetic) take part in the oxidation of pyruvic acid as part of the tricarboxylic acid cycle. See: dicarboxylic acid cycle. (05 Mar 2000) |