| lactate dehydrogenase virus | A species of RNA virus, probably an arterivirus, occurring in a number of transplantable mouse tumours. Infected mice have permanently elevated serum levels of lactate dehydrogenase. (12 Dec 1998) |
|---|---|
| lactate level | A test that measures the amount of lactic acid in the blood. Lactic acid is an intermediate product of carbohydrate metabolism and is derived mainly from muscle cells and red blood cells. Exercise will normally raise lactic acid levels. Conditions of oxygen deprivation (for example shock, heart failure, lung disease) will trigger anaerobic metabolism within muscle tissue resulting in lactic acid build up in the tissues. Normal lactic acid levels are 4.5 to 19.8 mg/dl. (27 Sep 1997) |
| aluminum magnesium silicate | An antacid. Synonym: aluminum magnesium silicate. (05 Mar 2000) |
| calcium magnesium-atpase | <enzyme> An enzyme that catalyses the hydrolysis of ATP and is activated by millimolar concentrations of either calcium or magnesium. Unlike calcium-transporting atpase it does not require the second divalent cation for its activity, and is not sensitive to orthovanadate. Registry number: EC 3.6.1.- (12 Dec 1998) |
| calcium magnesium dependent endodeoxyribonuclease | <enzyme> Similar in action but different from dnase i Registry number: EC 3.1.21.- Synonym: ca mg dnase, ca(2+)+mg(2+) dnase, calcium-magnesium endonuclease, ca-mg endonuclease (26 Jun 1999) |
| magnesium | <chemical, element> An essential divalent cation. The major role is as the chelated ion in ATP and presumably other triphosphonucleotides. The magnesium ATP complex is the sole biologically active form of ATP. The other essential role of magnesium is as the central ion of chlorophyll. Cellular concentration is less than 5mM. Serum concentration approximately 1mM. Pharmacologic action: Hypomagnesemia can cause refractory ventricular fibrillation or ventricular tachycardia. Uses: known hypomagnesemic states - suspect hypomagnesmia in alcoholics, chronic disease states, or others with poor nutrition; treatment of choice for Torsade de Pointes. Dose: 1-2 grams IV push for cardiac arrest, over 1 to 2 minutes for Torsades, and over 5 to 60 minutes for acute myocardial infarction. Potential complications: Transient flushing and diaphoresis, sinus bradycardia, hypotension, hyporeflexia and paralysis with overdose. Abbreviation: Mg (15 Mar 2000) |
| magnesium aluminum silicate | An antacid. Synonym: aluminum magnesium silicate. (05 Mar 2000) |
| magnesium bacteriopheophytinate | <microbiology, plant biology> Varieties of chlorophyll (bacteriochlorophylls a, b, c, d, e and g) found in photosynthetic bacteria and differing from plant chlorophyll in the substituents around the tetrapyrrole nucleus of the molecule and in the absorption spectra. (18 Nov 1997) |
| magnesium benzoate | Has been used in gout and rheumatoid arthritis. (05 Mar 2000) |
| magnesium-bicarbonate ATPase | <enzyme> Aspect of EC 3.6.1.3 Registry number: EC 3.6.1.- Synonym: mg-hco3-atpase, atpase, magnesium-bicarbonate (26 Jun 1999) |
| magnesium carbonate | Used in gastric and intestinal acidity and as a laxative. (05 Mar 2000) |
| magnesium chelatase | <enzyme> Catalyses the first committed step in chlorophyll biosynthesis by adding magnesium to protoporphyrin ix Registry number: EC 4.99.1- Synonym: mg-chelatase, magnesium-protoporphyrin chelatase (26 Jun 1999) |
| magnesium chloride | <chemical> Magnesium chloride. An inorganic compound consisting of one magnesium and two chloride ions. The compound is used in medicine as a source of magnesium ions, which are essential for many cellular activities. It has also been used as a cathartic and in alloys. Chemical name: Magnesium chloride (MgCl2) (12 Dec 1998) |
| magnesium citrate | Mg3(C6H5O7)2-14H 2O;a laxative; usually administered as an effervescent flavored beverage. (05 Mar 2000) |
| magnesium compounds | Inorganic compounds that contain magnesium as an integral part of the molecule. (12 Dec 1998) |