| phenocopy | <biology, genetics> An environmentally produced phenotype simulating the effect of a particular genotype. (18 Nov 1997) |
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| phenodin | Same as haematin. Source: Websters Dictionary (01 Mar 1998) |
| phenogamia | <botany> Same as Phaenogamia. Source: Websters Dictionary (01 Mar 1998) |
| phenol | <chemistry> 1. A white or pinkish crystalline substance, C6H5OH, produced by the destructive distillation of many organic bodies, as wood, coal, etc, and obtained from the heavy oil from coal tar. It has a peculiar odour, somewhat resembling creosote, which is a complex mixture of phenol derivatives. It is of the type of alcohols, and is called also phenyl alcohol, but has acid properties, and hence is popularly called carbolic acid, and was formerly called phenic acid. It is a powerful caustic poison, and in dilute solution has been used as an antiseptic. 2. Any one of the series of hydroxyl derivatives of which phenol proper is the type. <chemistry> Glacial phenol, any one of a series of compounds having both phenol and aldehyde properties. Phenol phthalein. See Phthalein. Origin: Gr. To show + -ol: cf. F. Phenol. Source: Websters Dictionary (01 Mar 1998) |
| phenol coefficient | A figure expressing the disinfecting power of any substance; it is obtained by dividing the figure indicating the degree of dilution of the disinfectant that kills a microorganism in a given time by that indicating the degree of dilution of phenol which kills the organism in the same space of time under similar conditions. Synonym: hygienic laboratory coefficient, phenol coefficient. (05 Mar 2000) |
| phenol glucuronosyltransferase | <enzyme> Also catalyses the glucuronidation of 1-naphthol, 4-methylumbelliferone, 4-nitrophenol and related cpds; encoded by ugt1 complex Registry number: EC 2.4.1.- Synonym: phenol gcstransferase, phenol udp-glucuronosyltransferase, ugt1a1, rat, 1-naphthol udp-glucuronosyltransferase (26 Jun 1999) |
| phenol oxidase | <enzyme> An enzyme oxidizing benzenediols to semiquinones with O2. Synonym: monophenol monooxygenase, phenol oxidase, phenolase, polyphenol oxidase, urushiol oxidase. (05 Mar 2000) |
| phenol red | <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) |
| phenolaemia | The presence of phenols in the blood. Origin: phenol + G. Haima, blood (05 Mar 2000) |
| phenolase | <enzyme> An enzyme oxidizing benzenediols to semiquinones with O2. Synonym: monophenol monooxygenase, phenol oxidase, phenolase, polyphenol oxidase, urushiol oxidase. (05 Mar 2000) |
| phenolate | <chemistry> A compound of phenol analogous to a salt. Origin: Phenol + -ate. Source: Websters Dictionary (01 Mar 1998) |
| phenolated | Impregnated or mixed with phenol. Synonym: carbolated. (05 Mar 2000) |
| phenology | The study of the biological rhythms of plants and animals, particularly those rhythms showing seasonal variation. Origin: G. Phaino, to appear, + logos, study (05 Mar 2000) |
| phenolphthalein | Obtained by the action of phenol on phthalic anhydride; used as a hydrogen ion indicator and as a laxative. (05 Mar 2000) |
| phenolphthaleins | <chemical> A family of 3,3-bis(p-hydroxyphenyl)phthalides). They are used as indicators, cathartic, and dyes. Pharmacological action: cathartic, indicators and reagents, phthalein dyes. (12 Dec 1998) |