Tests and Reagents
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| Partner: | buecher.de |
| Hersteller: | Forgotten Books (Cohn, Alfred I.) |
| Stand: | 2015-08-04 03:50:33 |
Produktbeschreibung
Excerpt from Tests and Reagents: Chemical and Microscopical Abram (Lead In Urine). Add ammonium oxalate to urine(1:150 and introduce metallic magnesium (wire or rod). Lead is precipitated on the magnesium, and can be identified by warming with fragment of iodine - yellow lead iodide; or dissolving in nitric acid and applying other reagents. Sensitive to 1:50,000. Adamkiewicz (Albumin). Acetic-acid solutions of albuminous substances are colored violet by cone, sulphuric acid, and show greenish fluorescence. A similar reaction results if albumin is treated with a mixture of 1 vol. cone, sulphuric acid and 2 vol. glacial acetic acid. Heating hastens reaction, and, according to Wurster, so does addition of a few grains sodium chloride. Gelatin gives no reaction. Adamkiewicz (Nerve-Center Stain). Harden sections in Miiller´s solution for 1 to 3 months, wash with water, then with water acidulated with nitric acid, then stain with cone, solution safranine. Remove superfluous color, clear with alcohol and clove oil, pass into water again, wash in water acidulated with acetic acid, stain with methylene blue, and clear as before. Myelin is stained red; nuclei violet. Adams (Fat In Milk Analysis). Dry a known quantity of milk on a fat-free paper coil, then extract latter with ether in a Soxhlet apparatus. Adrian (Differentiating Natural And Artificial Methyl Salicylates). Carefully overlay 5 Cc. methyl salicylate on 5 Cc. cone, sulphuric acid. A synthetic product affords a slight development of heat and a faint pink color. Natural oil develops decided heat, and liquid becomes pink, changing to a wine-red and finally reddish-brown. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
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