| glycerol kinase | <enzyme> An enzyme that catalyses the formation of glycerol 3-phosphate from ATP and glycerol. Dihydroxyacetone and l-glyceraldehyde can also act as acceptors; utp and, in the case of the yeast enzyme, itp and GTP can act as donors. It provides a way for glycerol derived from fats or glycerides to enter the glycolytic pathway. Chemical name: ATP:glycerol 3-phosphotransferase Registry number: EC 2.7.1.30 (12 Dec 1998) |
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| glycerol oxidase | <enzyme> Oxidises glycerol in the presence of oxygen to glyceraldehyde and hydrogen peroxide without the requirement of any exogenous cofactors; protoheme ix and copper are in prosthetic group Registry number: EC 1.1.3.- (26 Jun 1999) |
| glycerol phosphate | The anion of a phosphoric ester of glycerol; the 3-derivative is the central component of phosphatidates (R-glycerol 3-phosphate). Synonym: glycerophosphate. (05 Mar 2000) |
| sn-glycerol-3-phosphorylcholine synthetase | <enzyme> Found in rat lung and muscle Registry number: EC 2.6.99.- Synonym: gpc synthetase, phosphatidylcholine-glycerol-3-phosphate cholinetransferase (26 Jun 1999) |
| indole-3-glycerol-phosphate synthase | <enzyme> An enzyme in the tryptophan biosynthetic pathway. Chemical name: 1-(2-Carboxyphenylamino)-1-deoxy-D-ribulose-5-phosphate carboxy-lyase (cyclizing) Registry number: EC 4.1.1.48 (12 Dec 1998) |
| iodinated glycerol | A form of organically bound iodine which liberates iodine systemically. Has been used as a medicinal source of iodine and as an expectorant in place of inorganic iodides such as potassium iodide. Synonym: iodopropylidene glycerol, organidin. (05 Mar 2000) |
| iodopropylidene glycerol | A form of organically bound iodine which liberates iodine systemically. Has been used as a medicinal source of iodine and as an expectorant in place of inorganic iodides such as potassium iodide. Synonym: iodopropylidene glycerol, organidin. (05 Mar 2000) |
| L-alpha-glycerol-phosphate oxidase | <enzyme> Uses molecular oxygen; forms hydrogen peroxide and dehydroxyacetonephosphate Registry number: EC 1.1.3.- Synonym: glycerolphosphate oxidase (26 Jun 1999) |
| Abbe test plate | <equipment> A long, wedge-shaped coverslip about 0.20 mm thick at one end and 0.10 to 0.12 mm at the other end coated chemically with a silver film on which are ruled horizontal lines. at each variation in thickness of 0.01 mm there are vertical lines. By means of oblique illumination and by focusing on different portions of the plate, it is possible to determine the optimum coverslip thickness for any objective and also, for microscopes with drawtubes, the tube length for best objective performance. The approximate freedom from spherical and chromatic aberrations can also be estimated. Small isolated bits of silver near the edges of the lines form good objects for the star test (05 Aug 1998) |
| acetone test | A test for ketonuria; the suspected urine is shaken up with a few drops of sodium nitroprusside, and strong ammonia water is then gently poured over the mixture; if acetone is present, a magenta ring forms at the line of contact; tablets containing sodium nitroprusside and alkali are now more commonly used. (05 Mar 2000) |
| achievement test | A standardised test used to measure acquired learning, e.g., competence in a specific subject area such as reading or arithmetic, in contrast to an intelligence test which is a useful index of potential ability or learning. (05 Mar 2000) |
| acidified serum test | Lysis of the patient's red cells in acidified fresh serum, specific for paroxysmal nocturnal haemoglobinuria. Synonym: Ham's test. (05 Mar 2000) |
| acid loading test | <nephrology> This is a test used in the diagnosis of renal tubular acidosis. The patient takes ammonium chloride capsules for 3 days to acidify the blood (lower blood pH). A sample of the urine and the blood is then collected and the results are interpreted. (27 Sep 1997) |
| acid perfusion test | <gastroenterology, investigation> A test used to diagnosis gastrooesophageal reflux disease. This investigation requires that the patient swallow 3 tiny tubes into the stomach. A mixture of hydrochloric acid (like stomach acid) and saline are alternatively injected into the tubes. The patient then reports any symptoms they may have. Some patients may vomit. (13 Nov 1997) |
| acid phosphatase test for semen | A screening test for semen by determining acid phosphatase content; because seminal fluid contains high concentrations of acid phosphatase, while other body fluids and extraneous foreign materials have very low concentrations, high values of acid phosphatase on vaginal aspirate or lavage, or on wash fluid from stains, render positive identification of semen, even if the male is aspermic. (05 Mar 2000) |