| calcium radioisotopes | Unstable isotopes of calcium that decay or disintegrate emitting radiation. Ca atoms with atomic weights 39, 41, 45, 47, 49, and 50 are radioactive calcium isotopes. (12 Dec 1998) |
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| calcium rigor | Arrest of the heart in the fully contracted state as a result of poisoning with calcium. (05 Mar 2000) |
| calcium saccharate | Calcium d-saccharate;used as an antacid in dyspepsia and flatulence, as an antidote in carbolic acid poisoning, and as a stabiliser for calcium gluconate solution for parenteral administration. (05 Mar 2000) |
| calcium sign | In chest radiography, displacement of the line of the calcified intima of the aorta away from its outer wall, a finding in a small percentage of cases of dissection of blood in the aortic media; the expression "displaced intimal calcification" is preferred to the listed term. See: aortic dissection. (05 Mar 2000) |
| calcium stearate | Used in the preparation of tablets as a lubricant for tablet machinery and to keep powder mixtures flowing. (05 Mar 2000) |
| calcium sulfate | <chemical> It exists in an anhydrous form and in various states of hydration: the hemihydrate is plaster of paris, the dihydrate is gypsum. It is used in building materials, as a desiccant, in dentistry as an impression material, cast, or die, and in medicine for immobilizing casts and as a tablet excipient. Pharmacological action: dental materials, excipient. Chemical name: Sulfuric acid, calcium salt (1:1) (12 Dec 1998) |
| calcium sulfite | Used as an intestinal antiseptic, and locally in the treatment of parasitic skin diseases. (05 Mar 2000) |
| calcium trisodium pentetate | The calcium trisodium salt of pentetic acid. Synonym: calcium trisodium pentetate. (05 Mar 2000) |
| calcium tungstate | A phosphor with a high stopping power for X-rays that was formerly used widely in fluoroscopic screens and intensifying screens for radiography. (05 Mar 2000) |
| calcium, dietary | Calcium compounds used as food supplements or in food to supply the body with calcium. Dietary calcium is needed during growth for bone development and for maintenance of skeletal integrity later in life to prevent osteoporosis. (12 Dec 1998) |
| calcium-45 | <radiobiology> Most easily available of the radioactive calcium-45 isotopes; beta-emitter with a half-life of 162.7 days; used as a tracer. (05 Mar 2000) |
| calcium-47 | <radiobiology> A radioisotope of calcium with a half-life of 4.54 days, used in the diagnosis of disorders of calcium metabolism. (05 Mar 2000) |
| calcium-binding protein | <biochemistry> There are two main groups of calcium binding proteins, those that are similar to calmodulin and are called EF hand proteins and those that bind calcium and phospholipid (e.g. Lipocortin) and that have been grouped under the generic name of annexins. Many other proteins will bind calcium, although the binding site usually has considerable homology with the calcium-binding domains of calmodulin. They can act as transport proteins, regulator proteins or activator proteins. There is also a vitamin D-dependent variant which is a protein that plays a fundamental role in the vitamin d mediated transport of calcium in reptiles, amphibians, birds and mammals. It is found in the intestine, kidneys, egg shell gland, brain, and possibly other organs. Its molecular weight is species dependent. (12 May 2002) |
| calcium-calmodulin dependent protein kinase | <enzyme> A calmodulin-dependent enzyme that catalyses the phosphorylation of proteins. This enzyme is also sometimes dependent on calcium. A wide range of proteins can act as acceptor, including vimentin, synapsin, glycogen synthase, myosin light chains, and the microtubule-associated proteins. Registry number: EC 2.7.10.- (12 Dec 1998) |
| calcium-calmodulin-activated histone 3 arginine kinase | <enzyme> From nuclear extracts of dividing and quiescent rat heart endothelial cells; represents a new class of ca-cam-dependent kinases which phosphorylate arg Registry number: EC 2.7.10.- Synonym: ca(2+)-calmodulin-activated histone 3 arg kinase, ca-cam h3 kinase (26 Jun 1999) |