| performic acid | H-CO-O-OH;an organic peracid used in cleaving disulfide links in peptides by oxidizing cysteine and cystine to cysteic acid. Synonym: peroxyformic acid. (05 Mar 2000) |
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| performic acid reaction | Oxidative destruction of the ethylene double bond (-HC==CH-) which is converted to a Schiff-reactive double aldehyde; used to indicate the presence of unsaturated lipids, such as phospholipids and cerebrosides, as well as cystine-rich substances, such as keratin, in tissue sections. (05 Mar 2000) |
| perfrigeration | A minor degree of frostbite. Origin: L. Per-frigero, pp. -atus, to make cold, fr. Frigus, cold (05 Mar 2000) |
| perfume | 1. The scent, odour, or odouriferous particles emitted from a sweet-smelling substance; a pleasant odour; fragrance; aroma. "No rich perfumes refresh the fruitful field." (Pope) 2. A substance that emits an agreeable odour. "And thou shalt make it a perfume." (Ex. Xxx. 35) Origin: F. Parfum; cf. Sp. Perfume. See Perfume. Source: Websters Dictionary (01 Mar 1998) |
| perfunctory | 1. Done merely to get rid of a duty; performed mechanically and as a thing of rote; done in a careless and superficial manner; characterised by indifference; as, perfunctory admonitions. 2. Hence: Mechanical; indifferent; listless; careless. "Perfunctory in his devotions." Origin: L. Perfunctorius, fr. Perfunctus dispatched, p.p. Of perfungi to discharge, dispatch; per (see Per) + fungi to perform. See Function. Source: Websters Dictionary (01 Mar 1998) |
| perfusate | The fluid used for perfusion; sometimes more broadly applied to fluid that has been forced through any more or less porous membrane or material. Origin: see perfuse (05 Mar 2000) |
| perfuse | To force blood or other fluid to flow from the artery through the vascular bed of a tissue or to flow through the lumen of a hollow structure (e.g., an isolated renal tubule). Compare: perifuse, superfuse. Origin: L. Perfusio, fr. Per-+ fusio, a pouring (05 Mar 2000) |
| perfusion | 1. <physiology> The act of pouring over or through, especially the passage of a fluid through the vessels of a specific organ. 2. A liquid poured over or through an organ or tissue. (18 Nov 1997) |
| perfusion cannula | A double-barreled cannula used for irrigation of a cavity, the wash fluid passing into the cavity through one tube and out through the other. Washout cannula, a cannula that can be irrigated without removal from the artery. (05 Mar 2000) |
| perfusion, regional | Neoplasm drug therapy involving an extracorporeal circuit with temporary exclusion of the tumour-bearing area from the general circulation during which high concentrations of the drug are perfused to the isolated part. (12 Dec 1998) |
| pergolide | <chemical> 8-((methylthio)methyl)-6-propylergoline. A long-acting dopamine agonist which is effective in the treatment of parkinson's disease and hyperprolactinaemia. It has also been observed to have antihypertensive effects. Pharmacological action: antiparkinson agents, dopamine agonists, neuroprotective agents. Chemical name: Ergoline, 8-((methylthio)methyl)-6-propyl-, (8beta)- (12 Dec 1998) |
| pergolide mesylate | 8b-[(Methylthio)methyl]-6-propylergoline monomethanesulfonate;an ergot derivative with dopaminergic properties; used in parkinsonism. (05 Mar 2000) |
| pergonal | Human menopausal gonadotrophins are the luteinising and follicle-stimulating hormones recovered from the urine of postmenopausal women that is used to induce multiple ovulation in various fertility treatments. (09 Oct 1997) |
| perhaps | By chance; peradventure; perchance; it may be. "And pray God, if perhaps the thought of thine heart may be forgiven thee." (Acts viii. 22) Origin: Per + hap chance. Source: Websters Dictionary (01 Mar 1998) |
| perhexiline | <chemical> 2-(2,2-dicyclohexylethyl)piperidine. Coronary vasodilator used especially for angina of effort. It may cause neuropathy and hepatitis. Pharmacological action: calcium channel blockers, cardiovascular agents, vasodilator agents. Chemical name: Piperidine, 2-(2,2-dicyclohexylethyl)- (12 Dec 1998) |