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URIC See also:ACID, C5H4N403 , in organic See also:chemistry, an acid which is one of the penultimate products of the See also:tissue See also:waste in the human See also:body. While the bulk of the See also:nitrogen of the albuminoids passes off through the See also:bladder as See also:urea, a small portion of it stops at the uric acid See also:stage. Human urine contains only a fraction of a per cent. of the acid, chiefly as See also:sodium See also:salt; abundance of uric acid is met with in the excrement of serpents and birds, with whom it is the See also:principal nitrogenous product of tissue waste. For its preparation See also:guano is boiled repeatedly with a See also:solution of See also:borax in 120 parts of See also:water. The filtered solution is acidified with hydrochloric acid, when impure uric acid separates out as a 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 precipitate, which is washed with See also:cold water; it is then dissolved in hot dilute See also:caustic potash• or soda, the solution filtered, and the filtrate saturated with See also:carbon dioxide. An almost insoluble urate is precipitated, which is filtered, washed and decomposed by hot dilute hydrochloric acid. Uric acid separates as a See also:- WHITE
- WHITE, ANDREW DICKSON (1832– )
- WHITE, GILBERT (1720–1793)
- WHITE, HENRY KIRKE (1785-1806)
- WHITE, HUGH LAWSON (1773-1840)
- WHITE, JOSEPH BLANCO (1775-1841)
- WHITE, RICHARD GRANT (1822-1885)
- WHITE, ROBERT (1645-1704)
- WHITE, SIR GEORGE STUART (1835– )
- WHITE, SIR THOMAS (1492-1567)
- WHITE, SIR WILLIAM ARTHUR (1824--1891)
- WHITE, SIR WILLIAM HENRY (1845– )
- WHITE, THOMAS (1628-1698)
- WHITE, THOMAS (c. 1550-1624)
white precipitate, which is filtered off, washed and dried, to be repurified by a repetition of the See also:alkali See also:process or otherwise. Pure uric acid forms a See also:snow-white
micro-crystalline See also:powder, devoid of See also:smell or See also:taste, soluble in 'Soo parts of boiling and in 14,000 parts of cold water, but in-soluble in See also:alcohol and in See also:ether. For its detection in urine, the urine is mixed with excess of hydrochloric acid, and allowed to stand, when the uric acid separates out, generally coloured reddish by impurities. The precipitate is dissolved in a few drops of nitric acid and the solution cautiously evaporated to dryness. The See also:residue when exposed to See also:ammonia See also:gas assumes the intense See also:purple See also:colour of murexide.
The acid, which was discovered by C. See also:Scheele in 1776 in urinary calculi, was afterwards investigated by See also:Liebig and See also:Wohler. The determination of its constitution, and its relation to other See also:vegetable and See also:animal products, followed from the researches of A. von See also:Baeyer and E. See also:Fischer (see See also:PURIN).
End of Article: URIC ACID, C5H4N403
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