[99] Zeit. f. Physiol. Chem. xli. f. 153 (1904). See also the articles by Mr. A. Seymour Jones, B.Sc., writing under the pseudonym of “Heof Joppa,” in the Leather Trades’ Review, July 19, 1911, p. 540; and Aug. 16, 1911, p. 625.
[100] See, however, the recent paper by Eberle and Krall, Ueber den Nachweis des Trypsins im Hundekot, Collegium 1911, p. 201, in which the authors endeavour to show the presence of unchanged trypsin in dog dung. Their proof depends upon the action of an antipancreatic serum on infusions of dog dung based on the work of Achalme, Ann. de l’Inst. Pasteur, 1901, p. 737. See also the criticism on this paper by Dr. Otto Röhm and Dr. Max Goldman, Collegium, 1911, p. 265. Hammarsten (Physiol. Chemistry, 1911, p. 494) states that “among the secretions which undergo putrefaction in the intestine, the pancreatic juice, which putrefies most readily, takes place first.”
[101] Duclaux. See Bibliography.
[102] Koch’s Jahresbericht über Gärhungs Organismen, 1908, 635.
[103] J.S.C.I., vol. xiii., 1894, p. 218.
[104] The word pancreatin is used throughout in the sense of pancreas extract. As is well known, this contains several enzymes, trypsin, steapsin, maltase, and also a rennin.
[105] Also known as steapsin, or pyolin (Allen, p. 357, vol. iv., Comm. Org. Analysis).
[106] In the digestion of fat by dogs the glycerol produced is all absorbed before the ileum is reached, so that none exists in the excrement. (Levites, Chem. Soc. Abst. 1907, vol. iv. p. 891.)
[107] Another instance of the reversibility of enzyme action is the secretion of a peptolytic enzyme, by B. pyocyaneus; i.e. it has the power of synthesizing proteins, as well as of decomposing them. (Zak. Chem. Soc. Abst. 1907, p. 996.)
[108] Chem. Soc. Annual Reports IV., 1907, p. 252.