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- W2017137722 abstract "THE ZIMMERMANN procedure for color development in an alkaline alecholic solution with substances containing the - CH2CO grouping has been applied by a number of investigators to the assay of crystalline and urinary androgens (1–-7). Our modification of this reaction for use in the Oesting colorimeter has been found to be of distinct clinical value in the assay of urinary androgens (7). These observations were extended to include a similar study with the Evelyn photoelectric colorimeter (8) in order to eliminate the subjective factors inherent in visual comparative measurements and because one can study under more favorable circumstances the factors which influence the rate and course of color development. For these reasons the instrument was useful in the development of a more accurate method for the determination of ketonic sterols such as crystalline androsterone and dehydroisoandrosterone. This communication is concerned with the method of color development and the calibration of the Evelyn photoelectric colorimeter for this technic with crystalline androsterone." @default.
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- W2017137722 date "1939-12-01" @default.
- W2017137722 modified "2023-09-23" @default.
- W2017137722 title "DETERMINATION OF CRYSTALLINE ANDROSTERONE WITH THE EVELYN PHOTOELECTRIC COLORIMETER" @default.
- W2017137722 doi "https://doi.org/10.1210/endo-25-6-919" @default.
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