| ligand gated ion channel | A transmembrane ion channel whose permeability is increased by the binding of a specific ligand, typically a neurotransmitter at a chemical synapse. The permeability change is often drastic, such channels let through effectively no ions when shut, but allow passage at up to 10exp7 ions sexp 1 when a ligand is bound. Recently, the receptors for both acetylcholine and GABA have been found to share considerable sequence homology, implying that there may be a family of structurally related ligand gated ion channels. (18 Nov 1997) |
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| alpha-phenoxyethylpenicillin potassium | A penicillin preparation that is stable in gastric acid and is rapidly but only partially absorbed from the gastrointestinal tract. Synonym: alpha-phenoxyethylpenicillin potassium, penicillin B. (05 Mar 2000) |
| alpha-phenoxypropylpenicillin potassium | A semisynthetic acid-stable penicillin that may be more effective than penicillin G. Synonym: alpha-phenoxypropylpenicillin potassium. (05 Mar 2000) |
| aluminum potassium sulfate | AlK(SO4)2;an astringent and styptic; also used in veterinary medicine for ulcerative stomatitis, leukorrhoea, and conjunctivitis. Synonym: potassium alum. (05 Mar 2000) |
| amoxicillin-potassium clavulanate combination | <chemical> A fixed-ratio combination of amoxicillin trihydrate, an aminopenicillin, and potassium clavulanate, a beta-lactamase inhibitor, used to treat broad-spectrum antibacterial infections, especially of resistant strains. Pharmacological action: antibiotics, combined, antibiotics, lactam, enzyme inhibitors. (12 Dec 1998) |
| antimony potassium tartrate | <chemical> Bis(mu-(2,3-dihydroxybutanedioato(4-)-o(1),o(2):o(3),o(4)))diantimonate(2-) dipotassium trihydrate, stereoisomer. A schistosomicide possibly useful against other parasites. It has irritant emetic properties and may cause lethal cardiac toxicity among other adverse effects. Pharmacological action: schistosomicides. Chemical name: Antimonate(2-), bis(mu-(2,3-dihydroxybutanedioato(4-)-O1,O2:O3,O4))di-, dipotassium, trihydrate, stereoisomer (12 Dec 1998) |
| canrenoate potassium | <chemical> A synthetic pregnadiene derivative with anti-aldosterone activity. Pharmacological action: aldosterone antagonists. Chemical name: Pregna-4,6-diene-21-carboxylic acid, 17-hydroxy-3-oxo-, monopotassium salt, (17alpha)- (12 Dec 1998) |
| penicillin G potassium | Potassium benzylpenicillin;the potassium salt of penicillin G, containing 85 to 90% penicillin G. (05 Mar 2000) |
| phenethicillin potassium | A penicillin preparation that is stable in gastric acid and is rapidly but only partially absorbed from the gastrointestinal tract. Synonym: alpha-phenoxyethylpenicillin potassium, penicillin B. (05 Mar 2000) |
| monobasic potassium phosphate | KH2PO4;used as a urinary acidifier and buffer. (05 Mar 2000) |
| potassium | <chemistry> An Alkali element, occurring abundantly but always combined, as in the chloride, sulphate, carbonate, or silicate, in the minerals sylvite, kainite, orthoclase, muscovite, etc. Atomic weight 39.0. Symbol K (Kalium). It is reduced from the carbonate as a soft white metal, lighter than water, which oxidizes with the greatest readiness, and, to be preserved, must be kept under liquid hydrocarbons, as naphtha or kerosene. Its compounds are very important, being used in glass making, soap making, in fertilisers, and in many drugs and chemicals. Potassium permanganate, the salt KMnO4, crystallizing in dark red prisms having a greenish surface colour, and dissolving in water with a beautiful purple red colour; used as an oxidizer and disinfectant. The name chameleon mineral is applied to this salt and also to potassium manganate. Potassium bitartrate. See Cream of tartar. Origin: NL. See Potassa, Potash. Source: Websters Dictionary (01 Mar 1998) |
| potassium-40 | A naturally occurring (0.0117%) radioactive potassium isotope; beta emitter with half-life of 1.26 billion years; chief source of natural radioactivity of living tissue. (05 Mar 2000) |
| potassium-42 | An artificial potassium isotope; beta emitter with half-life of 12.36 hr, used as a tracer in studies of potassium distribution in body fluid compartments and in localization of brain tumours. (05 Mar 2000) |
| potassium-43 | An artificial potassium isotope; a beta emitter with a half-life of 22.3 hr, used as a tracer in myocardial perfusion studies. (05 Mar 2000) |
| potassium acetate | An electrolyte replenisher, as well as a urinary and systemic alkaliser, which can be administered orally or by intravenous infusion. Formerly, it was used as a diuretic and expectorant. (12 Dec 1998) |