| citric acid | <biochemistry> An important intermediate in the citric acid cycle which breaks down glucose into water and carbon dioxide when oxygen is present. The acid contains three carboxyl groups, has the chemical formula of C6H8O7, and is found in citrus fruits (oranges, grapefruit, lemons, etc.). It is used as an antioxidant and as artificial flavouring in commercially-processed foods. (09 Oct 1997) |
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| citric acid cycle | <biochemistry> The central feaure of oxidative metabolism. Cyclic reactions whereby acetyl CoA is oxidized to carbon dioxide providing reducing equivalents (NADH or FADH2) to power the electron transport chain. Also provides intermediates for biosynthetic processes. (16 Dec 1997) |
| citric acid urine test | <investigation> A test which measures the amount of citric acid in the urine. This test is used to diagnose renal tubular acidosis and evaluate those with kidney stones. A below normal level of citric acid in the urine can indicate renal tubular acidosis. Urine citric acid levels can be increased in those with have a high carbohydrate diet, are on oestrogen therapy or vitamin D therapy. (27 Sep 1997) |
| potassium citrate | <chemical> A systemic alkaliser, electrolyte replenisher, diuretic, and expectorant, usually administered orally. It is sometimes used in veterinary medicine as a nonirritating diuretic. Pharmacological action: diuretics, expectorants. (12 Dec 1998) |
| effervescent potassium citrate | A mixture of potassium citrate, citric acid, sodium bicarbonate, and tartaric acid; used as a gastric antacid and urinary alkaliser. (05 Mar 2000) |
| acid-citrate-dextrose | A citrate anticoagulant used for the collection and preservation of whole blood. It has largely been replaced by newer coagulants (CPD, Adsol) that allow for longer shelf life for blood and blood products. Acronym: ACD (05 Mar 2000) |
| sodium acid citrate | Na3C6H5O7 -2H2O; trisodium citrate;used as diuretic, antilithic, systemic and urinary alkaliser, expectorant, and anticoagulant (in vitro). Synonym: sodium acid citrate. (05 Mar 2000) |
| sodium citrate acid | C6H6O7Na-11/2H2O; disodium hydrogen citrate;same actions and uses as sodium citrate; in addition, it may be used in solutions of glucose without producing caramelization of the latter during autoclaving. (05 Mar 2000) |
| potassium acid tartrate | KHC4H4O6;a diuretic and laxative. Synonym: cream of tartar, potassium acid tartrate. (05 Mar 2000) |
| ATP citrate lyase | ATP citrate (pro-3S)-lyase |
| ATP citrate (pro-3S)-lyase | <enzyme> An enzyme that, in the presence of ATP and CoA, catalyses the cleavage of citrate to yield acetyl CoA, oxaloacetate, ADP, and orthophosphate. This reaction represents an important step in fatty acid biosynthesis. Chemical name: ATP:citrate oxaloacetate-lyase ((pro-S)-CH2COO(-)--acetyl-CoA) (ATP-dephosphorylating) Registry number: EC 4.1.3.8 Synonym: citrate cleavage enzyme. (12 Dec 1998) |
| bismuth ammonium citrate | Ammoniocitrate of bismuth; an intestinal astringent. (05 Mar 2000) |
| bismuth citrate | Used in the making of bismuth and ammonium citrate. (05 Mar 2000) |
| caffeine citrate | Citrated caffeine, a mixture of equal parts of caffeine and citric acid. (05 Mar 2000) |
| calcium citrate | <chemical> A colourless crystalline or white powdery organic, tricarboxylic acid occurring in plants, especially citrus fruits, and used as a flavoring agent, as an antioxidant in foods, and as a sequestrating agent. Pharmacological action: antioxidants. (12 Dec 1998) |