| phenolsulfonphthalein | <chemical> 4,4'-(3h-2,1-benzoxathiol-3-ylidene)bisphenol s,s-dioxide. Red dye, pH indicator, and diagnostic aid for determination of renal function. It is used also for studies of the gastrointestinal and other systems. Pharmacological action: indicators and reagents, phthalein dyes. Chemical name: Phenol, 4,4'-(3H-2,1-benzoxathiol-3-ylidene)bis-, S,S-dioxide (12 Dec 1998) |
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| phenolsulfonphthalein test | An obsolete test for renal function; after the patient has drunk a glass or two of water, 1 ml of a 0.6% solution of dye is injected hypodermically; the time between this injection and the appearance of a pink tinge in the urine as it falls into an alkaline solution is noted; the amount excreted in each of the next 2 hours is then estimated colourimetrically. Synonym: Geraghty's test, phthalein test, red test, Rowntree and Geraghty test. (05 Mar 2000) |
| phenoluria | The excretion of phenols in the urine. (05 Mar 2000) |
| phenomenalism | <psychology> That theory which limits positive or scientific knowledge to phenomena only, whether material or spiritual. Source: Websters Dictionary (01 Mar 1998) |
| phenomenology | <study> A description, history, or explanation of phenomena. "The phenomenology of the mind." Origin: Phenomenon: cf. F. Phenomenologie. (01 Mar 1998) |
| phenomenon | Origin: L. Phaenomenon, Gr. Fainomenon, fr. Fainesqai to appear, fainein to show. See Phantom. 1. An appearance; anything visible; whatever, in matter or spirit, is apparent to, or is apprehended by, observation; as, the phenomena of heat, light, or electricity; phenomena of imagination or memory. "In the phenomena of the material world, and in many of the phenomena of mind." (Stewart) 2. That which strikes one as strange, unusual, or unaccountable; an extraordinary or very remarkable person, thing, or occurrence; as, a musical phenomenon. Source: Websters Dictionary (01 Mar 1998) |
| phenoperidine | <chemical> A narcotic analgesic partly metabolised to meperidine in the liver. It is similar to morphine in action and used for neuroleptanalgesia, usually with droperidol. Pharmacological action: analgesics, opioid, narcotics. Chemical name: 4-Piperidinecarboxylic acid, 1-(3-hydroxy-3-phenylpropyl)-4-phenyl-, ethyl ester (12 Dec 1998) |
| phenose | <chemistry> A sweet amorphous deliquescent substance obtained indirectly from benzene, and isometric with, and resembling, dextrose. Origin: Phenyl + dextrose. Source: Websters Dictionary (01 Mar 1998) |
| phenothiazine | <pharmacology> A group of tranquilising medications with antipsychotic action, thought to act by blocking dopaminergic transmission in the brain. They are used to treat mental, nervous and emotional disorders. Examples include: chlorpromazine, fluphenazine, mesoridazine, perphenazine, prochlorperazine, promazine, thioridazine, trifluoperazine, thiopropazate and triflupromazine. Trifluoperazine binds to and inhibits calmodulin and has been used experimentally to block calcium or calmodulin controlled reactions. (29 Sep 1997) |
| phenothiazine sulfoxidase | <enzyme> Converts ethionamide, chlorpromazine and thioridazine to their corresponding sulfoxides; requires NADPH and oxygen; does not contain p-450 Registry number: EC 1.8.- Synonym: ethionamide sulfoxidase (26 Jun 1999) |
| phenotype | <biology, genetics> The total characteristics displayed by an organism under a particular set of environmental factors, regardless of the actual genotype of the organism. Results from interaction between the genotype and the environment. (09 Jan 1998) |
| phenotypic | Relating to phenotype. (05 Mar 2000) |
| phenotypic threshold | A quantitative genetic trait with a continuous distribution termed its liability may generate two kinds of phenotype, according to whether the liability lies above or below some critical threshold at about which a radical change in behaviour occurs. For instance, blood uric acid level is a liability with an approximately gaussian distribution. At a critical point of chemical saturation (the threshold crystallization occurs and the resulting gout or nongout is a threshold trait. (05 Mar 2000) |
| phenotypic value | In quantitative genetics, the metrical quantity of some trait associated with a particular phenotype. (05 Mar 2000) |
| phenoxazine | Phenothiazine in which S is replaced by O; as the 3-oxo derivative (phenoxazone), phenoxazine is the chromophore of actinomycins. (05 Mar 2000) |
Synonyms : Phenotypes
Synonyms :
Synonyms : Dibenylene, Dibenyline, Dibenziran, Dibenzylin, Dibenzyline, Dibenzyran, Goldshield Brand of Phenoxybenzamine Hydrochloride, Link Brand of Phenoxybenzamine Hydrochloride, Phenoxybenzamine Hydrochloride, Wellspring Brand of Phenoxybenzamine Hydrochloride
Synonyms : Phenoxy-Propanolamines, Phenoxy Propanolamines
Synonyms : Falithrom, Hexal Brand of Phenprocoumon, Liquamar, Marcoumar, Marcumar, Phenprogramma, Roche Brand of Phenprocoumon, Worwag Brand of Phenprocoumon
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| phenol motor point block |
the most common method of motor point block; a solution of 5 per cent phenol in water is injected at the motor point. Called also phenol b.
Ãâó: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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| phenotypic adaptation |
a change in the structural and physiological properties of an organism in response to a genetic mutation or to a change in environment.
Ãâó: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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| phenol coefficient |
a measure of the bactericidal activity of a chemical compound in relation to phenol. The test is standardized (Rideal-Walker method, US Department of Agriculture method). The coefficient is calculated by dividing the concentration of the test compound at which it kills the test organism in 10 minutes, but not in 5 minutes, by the concentration of phenol that kills the organism under the same conditions. ...
Ãâó: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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| phenacetin |
Phenacetin, introduced in 1887, is used principly as a analgesic. Typical doses of 300mg to 500mg a day result in an analgesic effect. Its analgesic effects are due to its actions on the sensory tracts of the spinal cord. In addition, phenacetin has a depressant action of the heart, where it acts as a negative inotrope. It also is an antipyretic, acting on the brain to decrease the temperature set point. ...
Ãâó: en.wikipedia.org/wiki/Phenacetin
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| phenylalanine hydroxylase |
Phenylalanine hydroxylase (eg. EC 1.14.16.1) is an enzyme which catalyses the reaction causing the addition of an hydroxyl group to the end of the 6-carbon aromatic ring of phenylalanine, such that it becomes tyrosine. Phenylalanine hydroxylase is the rate-limiting enzyme of the metabolic pathway which degrades excess phenylalanine. Mutations in phenylalanine hydroxylase which result in lower activity are the cause of the disease phenylketonuria, or PKU. ...
Ãâó: en.wikipedia.org/wiki/Phenylalanine_hydroxylase
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