Notes on physiology / by Henry Ashby.

  • Henry Ashby
Date:
1889
Catalogue details

Licence: Public Domain Mark

Credit: Notes on physiology / by Henry Ashby. Source: Wellcome Collection.

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    Leucin. of HCl and a drop of solution of chloride of lime, indi2:o blue is formed. Lecithin, C44HgoNP09, occurs in the brain, yolk of egg, pus, and in smaller quantities in the blood and bile. It is a white crystalline substance, soluble in hot alcohol and ether. Cerebrin and Neurin are two substances which occur in the brain, and the latter also in yolk of egg. Leucin, CgHigNOg, in conjunction with tyrosin, is found in many of the organs and fluids of the body, in the pancreas, liver, spleen, in the peptones of Fig. 5.—Crystals of leucin and tyrosin (Salkowski and Leube). the alimentary canal, and in the urine in acute yellow atrophy and other diseases of the hver. These sub- stances are formed during the decomposition of albu- minous substances. They may be prepared by the artificial decomposition of albumen, fibrin, casein, gelatin, &c., but are most readily obtained by boiling horn-chips in dilute sulphuric acid. Leucin can also
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