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ARAROBA See also:POWDER , a See also:drug occurring in the See also:form of a yellowish-See also:- BROWN
- BROWN, CHARLES BROCKDEN (1771-181o)
- BROWN, FORD MADOX (1821-1893)
- BROWN, FRANCIS (1849- )
- BROWN, GEORGE (1818-188o)
- BROWN, HENRY KIRKE (1814-1886)
- BROWN, JACOB (1775–1828)
- BROWN, JOHN (1715–1766)
- BROWN, JOHN (1722-1787)
- BROWN, JOHN (1735–1788)
- BROWN, JOHN (1784–1858)
- BROWN, JOHN (1800-1859)
- BROWN, JOHN (1810—1882)
- BROWN, JOHN GEORGE (1831— )
- BROWN, ROBERT (1773-1858)
- BROWN, SAMUEL MORISON (1817—1856)
- BROWN, SIR GEORGE (1790-1865)
- BROWN, SIR JOHN (1816-1896)
- BROWN, SIR WILLIAM, BART
- BROWN, THOMAS (1663-1704)
- BROWN, THOMAS (1778-1820)
- BROWN, THOMAS EDWARD (1830-1897)
- BROWN, WILLIAM LAURENCE (1755–1830)
brown powder, varying considerably in tint, which derives an alternative name—Goa powder—from the Portuguese See also:colony of See also:Goa, where it appears to have been introduced about the See also:year 1852. The See also:- TREE (0. Eng. treo, treow, cf. Dan. tree, Swed. Odd, tree, trd, timber; allied forms are found in Russ. drevo, Gr. opus, oak, and 36pv, spear, Welsh derw, Irish darog, oak, and Skr. dare, wood)
- TREE, SIR HERBERT BEERBOHM (1853- )
tree which yields it is the Andira Araroba of the natural See also:- ORDER
- ORDER (through Fr. ordre, for earlier ordene, from Lat. ordo, ordinis, rank, service, arrangement; the ultimate source is generally taken to be the root seen in Lat. oriri, rise, arise, begin; cf. " origin ")
- ORDER, HOLY
order See also:Leguminosae. It is met with in See also:great abundance in certain forests in the See also:province of See also:Bahia, preferring as a See also:rule See also:low and humid spots. The tree is from 8o to Too ft. high and has large imparipinnate leaves, the leaflets of which are oblong, about 12 in. See also:long and a in. broad, and somewhat truncate at the See also:apex. The See also:flowers are papilionaceous, of a See also:purple See also:colour and arranged in panicles. The Goa powder or araroba is contained in the See also:trunk, filling crevices in the heartwood. It is a morbid product in the tree, and yields to hot See also:chloroform 5o% of a substance known officially as chrysarobin, which has a definite therapeutic value and is contained in most See also:modern pharmacopoeias. It occurs as a micro-crystalline, odourless, tasteless powder, very slightly soluble in either See also:water or See also:alcohol; it also occurs in See also:rhubarb See also:root. This complex mixture contains pure chrysarobin (C15H1203), di-chrysarobin methylether (C36H2307.00H3), di-chrysarobin (C30Hu07). Chrysarobin is a methyl trioxyanthracene and exists as a See also:glucoside in the plant, but is gradually oxidized to chrysophanic See also:acid (a dioxy-methyl See also:anthraquinone) and See also:glucose. This strikes a See also:blood-red colour in alkaline solutions, and may therefore cause much alarm if administered to a patient whose urine is alkaline. The See also:British See also:pharmacopoeia has an ointment containing one See also:part of chrysarobin and 24 of benzoated See also:lard.
Both internally and externally the drug is a powerful irritant. The See also:general practice amongst modern dermatologists is to use only chrysephanic acid, which may be applied externally and given by the mouth in doses of about one See also:grain in cases of See also:psoriasis and chronic See also:eczema. The drug is a feeble parasiticide, and has been used locally in the treatment of See also:ringworm. It stains the skin—and linen—a deep yellow or brown, a coloration which may be removed by See also:caustic See also:alkali in weak See also:solution.
End of Article: ARAROBA POWDER
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