POLAROGRAPHIC DETERMINATION OF DEHYDROISOANDROSTERONE AND OTHER 3-HYDROXY-Δ5-STEROIDS
نویسندگان
چکیده
منابع مشابه
Determination of dehydroisoandrosterone and 17-ketosteroids.
Methods for the quantitative determination of steroids have been developed, based on their specific chemical or physicochemical properties. The Zimmermann reaction (1) and the Kober reaction (2) have been found useful in the quantitative determination of certain individual steroids occurring in urine. Modifications of these reactions have been reported by Callow et al. (3), Holtorff and Koch (4...
متن کاملDetermination of Dehydroisoandrosterone and 17 - Ketosteroids
Methods for the quantitative determination of steroids have been developed, based on their specific chemical or physicochemical properties. The Zimmermann reaction (1) and the Kober reaction (2) have been found useful in the quantitative determination of certain individual steroids occurring in urine. Modifications of these reactions have been reported by Callow et al. (3), Holtorff and Koch (4...
متن کاملThe polarographic determination of thyroxine and 3:5-diiodotyrosine.
Although biological methods are used for assessing the value of thyro-active materials, chemical methods are also available to determine the thyroxine content of such substances. These methods are mainly based on the estimation of iodine as 'thyroxine iodine' (Harington & Randall, 1929; Leland & Foster, 1932; Brand & Kassell, 1939). Polarographic analysis suggests itself as a means of simplifyi...
متن کاملPolarographic determination of malononitrile.
A procedure is proposed for the determination of malononitrile by differential pulse polarography in methanolic 0.1M tetraethylammonium iodide/0.001M tetramethylammonium hydroxide as the supporting electrolyte. In this medium malononitrile is chemically converted into an electroactive species. With close control of timing of the steps in the procedure the error of the method is +/-1.5% in the c...
متن کاملMetabolism of dehydroisoandrosterone and other steroids by surviving slices of the potato tuber and additional plant tissues.
The conversion of dehydroisoandrosterone to its ,B-D-glucopyranoside is readily effected by surviving slices of the potato tuber at pH 8. This reaction is largely limited to dehydroisoandrosterone and isoandrosterone, and is slowly reversed at pH 4 as the result of weak P-glucosidase-like activity. Potatoes also contain an active /?-glucuronidase which differs from known preparations in possess...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 1941
ISSN: 0021-9258
DOI: 10.1016/s0021-9258(18)72907-4