| sudan | A republic in eastern africa, south of egypt and west of ethiopia. Its capital is khartoum. It was under egypt 1820-82, then jointly administered by egypt and great britain after 1899 as the anglo-egyptian sudan. It gained independence in 1956. The name is of arabic origin, balad as-sudan: bal (land) + al (as) (the) + sudan (black), the land of the blacks, the name given originally by arabian travelers. (12 Dec 1998) |
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| Sudan black B | A diazo dye, C29H24N6, used as a stain for fats. (05 Mar 2000) |
| Sudan brown | A brown stain, (C10H7)N==N(C10H6)OH, derived from alpha-naphthylamine and used as a stain for fats. (05 Mar 2000) |
| Sudan III | A red stain, (C6H5)N==N(C6H4)N==N(C10H6)OH, used for neutral fat in histologic technique; it also stains the fatty envelope of the tubercle bacillus. Synonym: Sudan red III. (05 Mar 2000) |
| Sudan IV | O-Tolylazo-o-tolylazo-beta-naphthol. An azo dye; a dark, brownish red powder, soluble in oils, fats, and chloroform, but insoluble in water; used in medicine as a vulnerary, in histology to stain fat in tissue sections and basic proteins at high pH, and in immunoelectrophoresis. Synonym: Biebrich scarlet red, medicinal scarlet red, scharlach red, Sudan IV. (05 Mar 2000) |
| Sudan red III | A red stain, (C6H5)N==N(C6H4)N==N(C10H6)OH, used for neutral fat in histologic technique; it also stains the fatty envelope of the tubercle bacillus. Synonym: Sudan red III. (05 Mar 2000) |
| Sudan stain | <chemical, investigation> Histochemical stains used for lipids. (18 Nov 1997) |
| Sudan yellow | Metadioxyazobenzene;a yellow stain for fats. (05 Mar 2000) |
| africa south of the sahara | All of africa except northern africa (africa, northern). (12 Dec 1998) |
| south | Lying toward the south; situated at the south, or in a southern direction from the point of observation or reckoning; proceeding toward the south, or coming from the south; blowing from the south; southern; as, the south pole. "At the south entry. <botany> " South-Sea tea See Yaupon. 1. To turn or move toward the south; to veer toward the south. 2. <astronomy> To come to the meridian; to cross the north and south line; said chiefly of the moon; as, the moon souths at nine. Origin: Southed; Southing. Source: Websters Dictionary (01 Mar 1998) |
| south africa | A republic in southern africa, the southernmost part of africa. It has three capitals: pretoria (administrative), cape town (legislative), and bloemfontein (judicial). The history is a fabric interwoven with hostile activity among the native tribes, particularly the zulus, the boers (dutch settlers), and the british. Officially the republic of south africa since 1960, it was called the union of south africa 1910-1960. (12 Dec 1998) |
| South African tick-bite fever | A typhus-like fever of South Africa caused by Rickettsia rickettsii and usually characterised by primary eschar and regional adenitis, rigors, and maculopapular rash on the fifth day, often with severe central nervous system symptoms. (05 Mar 2000) |
| South African type porphyria | Porphyria characterised by abdominal pain and neuropsychiatric abnormalities, by dermal sensitivity to light and mechanical trauma, by increased faecal excretion of proto-and coproporphyrin, and by increased urinary excretion of d-aminolevulinic acid, porphobilinogen, and porphyrins; due to a deficiency of protoporphyrinogen oxidase; autosomal dominant inheritance. Synonym: protocoproporphyria hereditaria, South African type porphyria. (05 Mar 2000) |
| south american blastomycosis | A chronic fungal infection caused by Paracoccidioides brasiliensis, characterised by primary pulmonary lesions with dissemination to many visceral organs. Common findings include ulcerative granuloma lesions to the buccal mucosa (inner lining of the cheek) and nasal mucosa that extend to the surrounding skin. Generalised lymphangitis is also typical. More commonly seen in South America and the tropics. (27 Sep 1997) |
| South American trypanosomiasis | Trypanosomiasis caused by Trypanosoma (or Schizotrypanum) cruzi and transmitted by certain species of reduviid (triatomine) bugs. In its acute form, it is seen most frequently in young children, with swelling of the skin at the site of entry, most often the face, and regional lymph node enlargement; in its chronic form it can assume several aspects, commonly cardiomyopathy, but megacolon and megaesophagus also occur; natural reservoirs include dogs, armadillos, rodents, and other domestic, domiciliated, and wild mammals. Synonym: Chagas' disease, Chagas-Cruz disease, Cruz trypanosomiasis. (05 Mar 2000) |