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. 1912 Excerpt: ...by Pasteur in 1852 from inactive aspartic acid, and by Kekulo in 1861 from bromosuccinic acid. The rf-acid was first obtained by Bremer in the reduction of d-tartaric acid. Preparation.--I-Malic acid occurs free in unripe grapes, apples, gooseberries, &c.f and in mountain ash berries Pyrus Aucuparia) (Ehrh.), in the ...
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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. 1912 Excerpt: ...by Pasteur in 1852 from inactive aspartic acid, and by Kekulo in 1861 from bromosuccinic acid. The rf-acid was first obtained by Bremer in the reduction of d-tartaric acid. Preparation.--I-Malic acid occurs free in unripe grapes, apples, gooseberries, &c.f and in mountain ash berries Pyrus Aucuparia) (Ehrh.), in the berries of Hippophai rkamnoides (Linn.)- and in Bcrberis vulgaris (Linn.) (Muttelet, Chem. Zentr. 1910, i. 370; Kunz and Adam, ibid. 1900, i. 1849; Farnsteiner, Zeitsch. Nahr. Genussm. 15, 598; Jorgensen, ibid. 17, 396; Adam. Chem. Zentr. 1905, ii. 1042; Erdmann, Ber. 1891, 3351; Tharm. Ontralh. 41, 200; Hilger, Zeitsch. Nahr. Genussm. 8, 110; Kremla, Hied. Zentr. 1895, 24, 498). Saint contains potassium malate to the extent of 2 p.c. of the solkf residue and it is a product of excretion (A. and P. Buisine, Gompt. rend. 106, 1426);-J-malic acid is also found in the calcium precipitate formed in the treatment of beetroot (Lippmann, Ber. 1891, 3299). It can be prepared from the unripe berries of Pyrus Aucuparia (Ehrh.) (Hagen, Annalen, 38, 257), or of Bcrberis vulgaris (Linn.)(Le-nsen, Ber. 1870, 966) in the following manner. The expressed juice is evaporated, filtered, heated to boiling, and saturated with milk of lime. The calcium malate which separates is dissolved in hot dilute nitric acid (1: 10); on cooling, the solution deposits the acid malate, which M purified bv recrystallisation from water. 1- order to obtain malic acid from it, its solution is precipitated with lead acetate and the lead salt is decomposed with sulphuretted hydrogen (Brceksmit, Pharm. W'eekbad. 42, 637). It m&S be obtained from tho juice of cherries or grapes by means of the cinchonine salt, which is very insoluble, the cinchonine salts of t...
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