This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1913 Excerpt: ...in nature is not definitely established; certain it is, however, that ellagic acid can be readily obtained by the hydrolysis of ellagitannic acid, a substance which almost invariably accompanies gallotannic acid in the numerous vegetable products in which this latter occurs; it also occurs in conjunction with tannins ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1913 Excerpt: ...in nature is not definitely established; certain it is, however, that ellagic acid can be readily obtained by the hydrolysis of ellagitannic acid, a substance which almost invariably accompanies gallotannic acid in the numerous vegetable products in which this latter occurs; it also occurs in conjunction with tannins of the pyrogallol class, and constitutes the bloom which is produced on leather by this type of tannin. Schiff: "Ber. deut. chem. Gesells.," 1871, 4, 232, 967; 1879, 12, 33; "Annalen," 1873, 170, 143. t Walden: "Ber. deut. chem. Gesells.," 1897, 30, 353 ' l898. 3I, 3'67 The most convenient natural sources are " divi-divi " (Casalpinia coriaria), "algarobilla" (Ccesalpinia brevi/olia), "myrobalans " Terminalia Chebuld), etc. Aqueous extracts of these fruits on long standing frequently deposit ellagic acid, most probably by the action of a ferment contained in the plant; it is, however, prepared by pouring a hot concentrated alcoholic extract of divi-divi into cold water; the acid is thereby precipitated, and may be filtered and purified. Synthetically it may be prepared by the oxidation of gallic acid by means of arsenic acid, or better by oxidizing gallic acid in acetic acid solution with potassium persulphate and sulphuric acid. Ellagic acid is a yellow microcrystalline solid which is very slightly soluble in water, and therefore readily separates from aqueous solutions in which it is formed; it is also very slightly soluble in alcohol or ether, but dissolves somewhat readily in boiling pyridine. The dried substance treated with 1-2 drops of nitric acid gives, on dilution with 1020 drops of water, a blood-red colour (Griessmayer's reaction). Its constitution is, according to Graebe, b...
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Add this copy of An Introduction to the Chemistry of Plant Products to cart. $19.45, good condition, Sold by Anybook rated 5.0 out of 5 stars, ships from Lincoln, UNITED KINGDOM, published 1917 by Longmans Green and Co.
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Seller's Description:
This is an ex-library book and may have the usual library/used-book markings inside. This book has hardback covers. In good all round condition. No dust jacket. Please note the Image in this listing is a stock photo and may not match the covers of the actual item, 1000grams, ISBN:
Add this copy of An Introduction to the Chemistry of Plant Products to cart. $22.29, new condition, Sold by Ingram Customer Returns Center rated 5.0 out of 5 stars, ships from NV, USA, published 2022 by Legare Street Press.
Add this copy of An Introduction to the Chemistry of Plant Products to cart. $27.06, fair condition, Sold by Anybook rated 5.0 out of 5 stars, ships from Lincoln, UNITED KINGDOM, published 1921 by Longmans Green and Co.
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Seller's Description:
This is an ex-library book and may have the usual library/used-book markings inside. This book has hardback covers. Clean from markings. In fair condition, suitable as a study copy. No dust jacket. Please note the Image in this listing is a stock photo and may not match the covers of the actual item, 850grams, ISBN:
Add this copy of An Introduction to the Chemistry of Plant Products to cart. $33.45, new condition, Sold by Ingram Customer Returns Center rated 5.0 out of 5 stars, ships from NV, USA, published 2022 by Legare Street Press.
Add this copy of An Introduction to the Chemistry of Plant Products to cart. $35.34, new condition, Sold by Ria Christie Books rated 5.0 out of 5 stars, ships from Uxbridge, MIDDLESEX, UNITED KINGDOM, published 2022 by Legare Street Press.
Add this copy of An Introduction to the Chemistry of Plant Products to cart. $40.00, good condition, Sold by de Wit Books rated 4.0 out of 5 stars, ships from Hutchinson, KS, UNITED STATES, published 1913 by Longmans, Green.
Add this copy of An Introduction to the Chemistry of Plant Products to cart. $46.21, new condition, Sold by Ria Christie Books rated 5.0 out of 5 stars, ships from Uxbridge, MIDDLESEX, UNITED KINGDOM, published 2022 by Legare Street Press.
