منابع مشابه
Studies on the Determination of Bile Pigments. Vi. Urobilinogen in Urine as Urobilinogen-aldehyde.
THE photometric determination of urobilinogen was proposed by Terwen (i) and employs the reaction of native urobilinogen, plus that derived from ferrous hydroxide reduction of urobilin, with Ehrlich’s reagent, p-dimethylaminobenzaldehyde. This basic approach culminated in the “quantitative” and “semiquantitative” methods of Watson (2,3) with minor modifications by various authors (4). Efforts i...
متن کاملStudies on the determination of bile pigments. III. Standardization of the determination of urobilinogen as urobilinogen-aldehyde.
Several preparations of urobilin and stercobilin were investigated with regard to their value as standards for the determination of urobilinogen and urobilin in biologic specimens. Products of commercial origin were found to be impure and therefore unsuitable for this purpose. Absorptivities were measured for solutions of the pigments in 3% FICI in methanol and for the chromogens, obtained by f...
متن کاملThe Aldehyde Test in Schistosomum Haematobium Infection
Method 2. (Modification of Napier, 1922.) Here instead of four drops of blood being taken directly from the patient's finger at the time of the test, as done by Napier, an equal quantity of previously collected blood was put into a small test tube containing c. c. of citrated saline (Formula : sod. cit. 0.5 grm., sod. chlor. 0.9 grm., and water 100 c. c.). After adding a drop of formalin, it wa...
متن کاملFurther Practical Experience with the Aldehyde Test
The Name.?Although the technique of the performance of this test is almost exactly similar to that of the formol-gel test for syphilis, the results and the standard 'by which one reads the results are entirely different; accordingly, I suggested that, in order to avoid confusion between the two tests and in order to prevent this test sharing the discredit which has inevitably fallen on the form...
متن کاملA Simple Litmus Test for Aldehyde Oxidase Metabolism of Heteroarenes
The bioavailability of aromatic azaheterocyclic drugs can be affected by the activity of aldehyde oxidase (AO). Susceptibility to AO metabolism is difficult to predict computationally and can be complicated in vivo by differences between species. Here we report the use of bis(((difluoromethyl)sulfinyl)oxy)zinc (DFMS) as a source of CF2H radical for a rapid and inexpensive chemical "litmus test"...
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ژورنال
عنوان ژورنال: BMJ
سال: 1949
ISSN: 0959-8138,1468-5833
DOI: 10.1136/bmj.1.4611.884