| yellow fever | <microbiology> An acute febrile illness of tropical regions, caused by a group B arbovirus and spread by a mosquito (Aedes aegypti). Characteristic features include: jaundice, black vomit and the absence of urination. Vaccination is available for travelers to endemic areas. (27 Sep 1997) |
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| yellow fever vaccination | A live attenuated (weakened) viral vaccine recommended for people traveling to or living in tropical areas in the americas and africa where yellow fever occurs. (12 Dec 1998) |
| yellow fever vaccine | A living, attenuated strain (17D) of yellow fever virus propagated in embryonated fowl eggs. A suspension of dried mouse brain infected with French neurotropic (Dakar) strain of yellow fever virus, administered topically by the scratch method; not officially recommended in the United States because of meningoencephalitic reactions. (05 Mar 2000) |
| yellow fever virus | <virology> A togavirus (Class IV) with an RNA genome responsible for the disease of the name whose symptoms include fever and haemorrhage. Transmitted by the mosquitoes Aedes aegypti and Haemagogus. Only one antigenic type of the virus known and causes fatal hepatitis in many primates, including humans. This virus is endemic to areas of Africa, South America and the Carribean and has been a major epidemic threat. (11 May 1997) |
| jungle yellow fever | A form occurring in South America, transmitted by Aedes leucocelaenus and various treetop mosquitoes of the Haemagogus complex; transmitted normally to primates, occasionally by chance to man to set off a human outbreak of classical yellow fever transmitted by Aedes aegypti. (05 Mar 2000) |
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| acridine yellow | A faintly yellow solution with strong bluish-violet fluorescence; used as a topical antiseptic and as a fluorescent stain in histology. Synonym: 5-aminoacridine hydrochloride, 9-aminoacridine hydrochloride. (05 Mar 2000) |
| acute yellow atrophy of the liver | A lesion in which there is extensive and rapid death of parenchymal cells of the liver, sometimes with fatty degeneration of the size of the organ; the necrosis may result from fulminant viral infection or chemical poisoning; associated with jaundice. Synonym: acute parenchymatous hepatitis, Rokitansky's disease. (05 Mar 2000) |
| brilliant yellow | An indicator dye that changes from yellow to orange or red at pH 6.4 to 8.0. (05 Mar 2000) |
| butter yellow | C6H5N:NC6H4N(CH3)2;a fat-soluble yellow dye (MW 225) that has hepatic carcinogenic action in experimental animals; used as an indicator of pH (red, at pH 2.9, yellow at pH 4.0). Synonym: dimethylaminoazobenzene, methyl yellow. (05 Mar 2000) |
| martius yellow | C10H6N2O5; 2,4-dinitro-alpha-naphthol;an acid dye used as a plasma stain in plant and animal histology, and as a light filter for photomicrography. Origin: Karl A. Martius, Ger. Chemist, *1920 (05 Mar 2000) |
| Paris yellow | A fine yellow powder used in paints and dyes. Synonym: lead chromate, Leipzig yellow, lemon yellow, Paris yellow. (05 Mar 2000) |
| visual yellow | The orange retinaldehyde resulting from the action of light on the rhodopsin of the retina, which converts the 11-cis-retinal component of the rhodopsin to all-trans-retinal plus opsin. Synonym: trans-retinal, visual yellow. (05 Mar 2000) |
| metanil yellow | A monoazo acid dye, C18H14N3O3SNa, used as a cytoplasmic and connective tissue stain. (05 Mar 2000) |
| methyl yellow | C6H5N:NC6H4N(CH3)2;a fat-soluble yellow dye (MW 225) that has hepatic carcinogenic action in experimental animals; used as an indicator of pH (red, at pH 2.9, yellow at pH 4.0). Synonym: dimethylaminoazobenzene, methyl yellow. (05 Mar 2000) |
| chrome yellow | A fine yellow powder used in paints and dyes. Synonym: lead chromate, Leipzig yellow, lemon yellow, Paris yellow. (05 Mar 2000) |
| Warburg's old yellow enzyme | <enzyme> A flavoprotein that reversibly oxidises NADPH to NADP and a reduced acceptor. Chemical name: NADPH:(acceptor) oxidoreductase Registry number: EC 1.6.99.1 (12 Dec 1998) |
| corralin yellow | The sodium salt of rosolic acid. (05 Mar 2000) |
| hydrazine yellow | <chemistry> An artificial dyestuff obtained as an orange-yellow powder, and regarded as a phenyl hydrazine derivative of tartaric and sulphonic acids. Origin: Tartaric + hydrazine. Source: Websters Dictionary (01 Mar 1998) |
| naphthol yellow S | 8-Hydroxy-5,7-dinitro-2-naphthalene sulfonic acid;an acid dye used as a stain for basic proteins in microspectro-photometry. (05 Mar 2000) |