| double-channel catheter | A catheter with two lumens, allowing irrigation and aspiration. Synonym: two-way catheter. (05 Mar 2000) |
|---|---|
| ion channel | <cell biology> A transmembrane pore that presents a hydrophilic channel for ions to cross a lipid bilayer down their electrochemical gradients. Some degree of ion specificity is usually observed and typically a million ions per second may flow. Channels may be permanently open, like the potassium leak channel or they may be voltage gated, like the sodium channel or ligand gated like the acetylcholine receptor. (27 Oct 1998) |
| ion channel gating | The opening and closing of ion channels due to a stimulus. The stimulus can be a change in membrane potential (voltage-gated), drugs or chemical transmitters (ligand-gated), or a mechanical deformation. Gating is thought to involve conformational changes of the ion channel which alters selective permeability. (12 Dec 1998) |
| transnexus channel | A hexagonal 15-20A |
| ligand-gated channel | A class of ion channel's whose ionic permeability is regulated by cell membrane receptors that respond to specific extracellular chemical signals. (05 Mar 2000) |
| 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) |
| 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) |