Diagnostic methods, chemical, bacteriological and microscopical, a text-book for students and practitioners . e a small quantity of thesediment in an evaporating dish and add a few drops of concentrated nitricacid. Evaporate on the water-bath to dryness, when a yellowish or reddishresidue will remain. Allow the residue to cool and add a few drops ofammonium hydrate solution. In the presence of uric acid a distinct reddishpurple color will appear. If water be added to this purple solution and themixture evaporated to dryness the color disappears. This latter point isof importance as xanthin, wh
Diagnostic methods, chemical, bacteriological and microscopical, a text-book for students and practitioners . e a small quantity of thesediment in an evaporating dish and add a few drops of concentrated nitricacid. Evaporate on the water-bath to dryness, when a yellowish or reddishresidue will remain. Allow the residue to cool and add a few drops ofammonium hydrate solution. In the presence of uric acid a distinct reddishpurple color will appear. If water be added to this purple solution and themixture evaporated to dryness the color disappears. This latter point isof importance as xanthin, which may resemble unusual types of uric acid inmicroscopic appearance, also gives the murexid test, but the color does notdisappear on heating with water. (2). Sodium Acid Urate (C5H3NaN,03). This salt of uric acid forms the bulk of the brick-dust deposit or sedi-mentum lateritium found when urine has cooled. In such cases the urine 34° DIAGNOSTIC METHODS. first shows a milky appearance and the sediment soon settles on the sidesand bottom of the container. This deposit is usually in the form of irregular. Fig. 93.—Acid sodium urate. {Hawk.) amorphous granules of a brownish or pink color. Occasionally the sedimentmay be distinctly crystalline, occurring as prismatic needle-like crystals whichare grouped in star-shaped, fan-shaped or dumb-bell-Hke clusters.
Size: 1582px × 1579px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpublis, booksubjectdiagnosis
