| PSP test | Phenol-Sulfon-Phthalein test |
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| phthalein dyes | Coloured condensation products of phenols with phthalic anhydride; some are used in dye dilution methods to determine kidney or liver function; others are used as pH indicators in chemistry; phenolphthalein is an effective mild cathartic. (12 Dec 1998) |
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| phthalein | <chemistry> One of a series of artificial organic dyes made as condensation products of the phenols with phthalic acid, and well represented by phenol phthalein. Their alkaline solutions are fluorescent. Phenol phthalein, a white or yellowish white crystalline substance made from phthalic acid and phenol. Its solution in alkalies is brilliant red, but is decolourized by acids, and as this reaction is exceedingly delicate it is used as an indicator. See: Phthalic. Source: Websters Dictionary (01 Mar 1998) |
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| phthalein 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) |
| acidic dyes | Dye's which ionise in solution to produce negatively charged ions or anions; they consist of sodium salts of phenols and carboxylic acid dyes; their solutions tend to be neutral or slightly alkaline; examples are eosin and aniline blue. (05 Mar 2000) |
| acridine dyes | Derivatives of the compound acridine which is closely related to xanthene; important as fluorochromes in histology, cytochemistry, and chemotherapy; examples include acriflavine, acridine orange, and quinacrine mustard. (05 Mar 2000) |
| azin dyes | Dye derivatives of phenazine, C6H4-N2-C6H4 that include important histologic stains, such as neutral red, azocarmine G., and safranin O. (05 Mar 2000) |
| azocarmine dyes | Dye's giving a dark purplish red colour as histologic stains. (05 Mar 2000) |
| azo dyes | Dye's in which the azo group is the chromophore and joins benzene or naphthalene rings; they include a large number of biologic stains, such as Congo red and oil red O; also used clinically to promote epithelial growth in the treatment of ulcers, burns, and other wounds; many have anticoagulant action. (05 Mar 2000) |
| basic dyes | Dye's which ionise in solution to give positively charged ions or cations; the auxochrome group is an amine which can form a salt with an acid like HCl; solutions are usually slightly acidic; examples include basic fuchsin and toluidine blue O. (05 Mar 2000) |
| chlorotriazine dyes | Dyes containing one or more chlorotriazine moieties that react with polysaccharides. (05 Mar 2000) |
| rosanilin dyes | Several triaminotriphenylmethane dye's or mixtures of them often sold under the name of basic fuchsin; rosanilin dye's differ from other triphenylmethane dye's in that the amino groups are unsubstituted, and they may have methyl groups introduced directly onto the benzene rings; the four possible such dyes are pararosanilin, rosanilin, new fuchsin, and magenta II. (05 Mar 2000) |
| rosaniline dyes | Any dye or mixture of dyes made from rosaniline, a red triphenylmethane aniline derivative; used to colour fabrics, paper and as biological stain; also used as disinfectant and topical antifungal agent. (12 Dec 1998) |
| hair dyes | Dyes used as cosmetics to change hair colour either permanently or temporarily. (12 Dec 1998) |
| xanthene dyes | Derivatives of the compound xanthene; include the pyronins, rhodamines, and fluoresceins. (05 Mar 2000) |
| natural dyes | Dye's obtained from animals or plants; examples include carmine, obtained from cochineal in the dried female insect Dactylopius cacti of Central America, and haematoxylin, extracted from the bark of the logwood tree Haematoxylon campechianum in the Caribbean area. (05 Mar 2000) |
| synthetic dyes | Organic dye compounds originally derived from coal-tar derivatives; presently produced by synthesis from benzene and its derivatives; examples include eosin, methylene blue, and fluorescein. (05 Mar 2000) |
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