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Excerpt from Manual of Clinical Chemistry The student should refer to the descriptive part of the text-book for the subjects treated of here. The Carbohydrates 1. Note the general appearance of the specimens of grape-sugar or dextrose, dextrin, and starch which are passed around. 2. Put some of each into cold water. Starch is insoluble; dextrose and dextrin slowly dissolve, but more readily in hot water. 3. Apply Trommer's Test for Dextrose.-Put a few drops of copper sulphate solution into a test-tube, then solution of dextrose, and then strong sodium hydroxide. On adding the NaOH a precipitate is first formed, which, on adding more, redissolves, forming a blue solution. On boiling this, a yellow or red precipitate (cuprous hydrate or oxide) forms. 4. Dextrin, - Add iodine solution to the solution of dextrin, and a reddish brown color is produced. The color disappears on heating. 5. Starch. - (a) Examine microscopically the scrapings from the surface of a freshly cut potato. Note the appearance of the starch-grains, with their concentric markings. (See table, p. 369.) (b) On boiling starch with water, an opalescent solution is formed, which, if strong, gelatinizes on cooling. (c) Add iodine solution. An intense blue color is produced, which disappears on heating, and, if not heated too long, reappears on cooling. N. B. - Prolonged heating drives off the iodine, and consequently no blue color returns on cooling. (d) Conversion into dextrin and dextrose. 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 o
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- PublisherForgotten Books
- Publication date2018
- ISBN 10 1330457943
- ISBN 13 9781330457948
- BindingPaperback
- Number of pages186
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Manual of Clinical Chemistry (Classic Reprint)
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Forgotten Books
(2020)
ISBN 10: 1330457943
ISBN 13: 9781330457948
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Book Description Paperback. Condition: New. Print on Demand. Excerpt from Manual of Clinical Chemistry. About the Publisher, Forgotten Books publishes hundreds of thousands of rare and classic books. 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. This text has been digitally restored from a historical edition. Some errors may persist, however we consider it worth publishing due to the work's historical value. The digital edition of all books may be viewed on our website before purchase. print-on-demand item. Seller Inventory # 9781330457948_0
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