Diseases of the stomach and intestines : a manual of clinical therapeutics for the student and practitioner / by Dujardin-Beaumetz ; tr. from the 4th French ed. by E.P. Hurd.

  • Georges Octave Dujardin-Beaumetz
Date:
1886
Catalogue details

Licence: Public Domain Mark

Credit: Diseases of the stomach and intestines : a manual of clinical therapeutics for the student and practitioner / by Dujardin-Beaumetz ; tr. from the 4th French ed. by E.P. Hurd. Source: Wellcome Collection.

Provider: This material has been provided by the Francis A. Countway Library of Medicine, through the Medical Heritage Library. The original may be consulted at the Francis A. Countway Library of Medicine, Harvard Medical School.

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    portion of bread, or of meat, or of both, the animals live longer, but they grow lean, and they perish about the sixtieth or eightieth day. 4. Finally if you experiment with the broth of meat alone and that which results from a mixture of a little quantity of meat and an equiva- lent of gelatine, you notice that the dogs which speedily became lean with gelatine soup, recover their plump condition with that made from meat.* 12 William Roberts has studied the comparative action of pepsin and of trypsin on albuminoid matters, and has pointed out this interesting fact, that pepsin attacks much more rapidly than trypsin, the albumin of egg, but that with respect to milk, the digestion is much more complete with trypsin than with pepsin, f 13 William Roberts, who has investigated with great care the digestion of feculent matters, has shown, in accordance with the experiments of Mus- culus, of O'Sullivan, of H. F. Brown, and J. Heron, that under the in- fluence of diastase the supposed breaking up of the starch molecule (C12H20O10), into one molecule of dextrine and one of grape sugar, is not strictly accurate, and that we ought to consider this molecule as consti- tuted by the reunion of a great number of other molecules, and that the final reaction should be represented by the following formula. 10 (C]2H20O10) + 8 (H,0) = 8 (C12H22Ou) + 3 (C12H22O10) Soluble starch. Water. Maltose. Achrodextrine. X 14 Leven maintains that gastric juice changes starch into dextrine, but cannot transform the latter into glucose. To demonstrate this, he turns some starch into a liquid in which has been macerated the mucous mem- brane of the stomach of an animal, and immediately the starch has lost its property of becoming blue by tincture of iodine. This change, he says, is due to the pepsine and not to the acid, but the modification of the starch stops there, for the liquid thus obtained cannot reduce Barres- wilFs solution § 15 Cane sugar, or saccharose, which is obtained from the sugar cane, maple, beet, undergoes in the living plant the action of a ferment which transforms it into inverted sugar. The intestinal juice has the same property, and acts as a ferment, transforming cane sugar into inverted sugar, as the following formula shows: C12H220„ + 2 H20 = C12H240]2 4- 012H24012 Saccharose. Water. Dextrose. Laevulose. || * (Papin, A new way of Softening- Bones and Dissolving out their Nutritive In- gredients, Paris, 1682. Changeux, On the Extraction of Gelatine from Bones, 1775* Proust, A new way of Improving the Diet of Soldiers, 1791. Darcet, Memoir on a new means of Extracting the Gelatinous Substance from Bones, Paris, 1829. Girar din, Report on the Employ of Bone Gelatine as a part of the Alimentary Regime, Rouen, 1831. Donne, Experiments on the Properties of Gelatine, 1841. Magendie, Report in the name of the Gelatine Commission, 1841. Lecoeur, Experiments on the Effects of he Gelatinous Solution in the Hotel Dieu, 1844. Bernard, Cours de Phys., 1848.) f William Roberts, On the Digestive Ferments, London, 1881. X O'Sullivan, Jour. Chem. Society, 1872, 1876. F. H. Brown and J. Heron, Jour. Chem. Society, 1879. William Roberts, On the Digestive Ferments. § Leven, Traits des maladies de l'Estomac. || Claude Bernard, Lecons sur les phenomenes de la vie, t. ii., p. 36, Paris, 1879.