Outlines of physiology in its relations to man / by John Gray McKendrick.

  • John Gray McKendrick
Date:
1878
Catalogue details

Licence: Public Domain Mark

Credit: Outlines of physiology in its relations to man / by John Gray McKendrick. 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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    group of the latter substance one atom of hydrogen is replaced by CHg (methyl). Example :— C,H.,ONH., ) ^ CeH.oONH., ) ^ C,H0(CH3)NH.;| ^ or or or C0H5NO2 CeHigNO. CgH^I^O, Glycocine or Leuchie or Sarcoshie or mefchyl- amido-acetic amido-caproic glycocine, or amido- acid. acid. methyl-acetic acid. The amides are often conjugated bodies, and they may behave either as bases forming unstable compounds with acids, or they may play the part of feeble acids, which, with the loss of Avater, unite with alkaline bases. The chief point at present of physiological importance is their insta- bility, especially in the conditions of the living body. Nearly related to tliese ammonia bases there are certain compounds known as animal nitrogenized acids, which are divided into two groups. 1. The Conjugated Biliary Acids, namely glycocholic acid, C26H43]SrOg, and taurocholic acid, CogH^sNSO^. These com- pounds are feeble acids, and in the bile exist in combination with sodium. When treated with weak acids or dilute caustic potash, they absorb a molecule of water, and split up into two simpler bodies. Example : — Glycocholic acid. Glycocine. Cholalic acid. C^eH^gNSO,^ + 1-1,0 = C^H^NSOg + G,,^,o% Taurocholic acid. Taurine. Cholalic acid. It is important to observe that these compounds split up into a nitrogenous and a non-nitrogenous portion. Hip- puric acid in like manner may, by the incorporation of water, be resolved into benzoic acid and glycocine. Thus :— C9H9NO3 + H.O = C^HgO, + CoHgNO., Hippuric acid. Benzoic acid. Glycocine.