The science and practice of medicine . rtain of the nitrogenous tissues of the principalglands, and occurs particularly in acute yelloio atrophy of the liver,where it is found in the substance of the liver itself. 8. Sediments of Tyrosine are of a greenish-yellow color, composedof heaps of fine needles, which can be obtained on ought to be treated with nitric acid, like leucine, and then a littleliquor soda used. The nitric acid gives a deep orange-yellow color,which becomes deep yellow on evaporation. The soda gives theyellow flake a red tinge; and on heat and evaporation, a bl
The science and practice of medicine . rtain of the nitrogenous tissues of the principalglands, and occurs particularly in acute yelloio atrophy of the liver,where it is found in the substance of the liver itself. 8. Sediments of Tyrosine are of a greenish-yellow color, composedof heaps of fine needles, which can be obtained on ought to be treated with nitric acid, like leucine, and then a littleliquor soda used. The nitric acid gives a deep orange-yellow color,which becomes deep yellow on evaporation. The soda gives theyellow flake a red tinge; and on heat and evaporation, a black- -^^S- ^2.* brown residue is left (Schererquoted by Parkes). Pathological Pelations.—It isfound wherever leucine is metwith. 9. Sediments of Cystine form awhite or light fawn-colored amor-phous, rather bulky precipitate,or they appear at once as six-sided plates (Fig. 32). In bothcases ammonia dissolves it,—sodo fixed alkalies and their car- * Cystine precipitated by acetic acid from its ammoniacal solution (after Thudi-ceuM).. 920 SPECIAL PATHOLOGY MICROSCOPIC EXAMINATION OF THE URINE. bonates; and from this solution it crystallizes on spontaneous evap-oration. It does not disappear when the urine is gently warmed;and it is insoluble in carbonate of ammonia, in dilute hydrochloricacid, and in acetic acid. Pathological Relations.—It is associated with the excessive elim-ination of sulphur. Its persistence in the urine is often hereditary,and is generally associated with derangement of the functions, ororganic disease of the liver. It occurs also in cases of chlorosis. CLASS III. SEDIMENTS COMPOSED OF SUBSTANCES FOREIGN TO THE URINE, AND WHICH ACCUMULATE IN THE URINE ALWAYS AFTER EX-POSURE TO THE ATMOSPHERE. 1. Fungi in acid urine—e. g., the Fenicillion glauciim, its spores^thallus, 2i\\(\. fructification. 2. The Toruloe cerevisice in saccharine urine begins to form in twoor three hours after emission. It forms a gelatinous mass, com-posed of sporiiles, which subsequ
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