Physiology of the carbohydrates : an epicriticism / by F. W. Pavy.

Date:
1895
Catalogue details

Licence: Public Domain Mark

Credit: Physiology of the carbohydrates : an epicriticism / by F. W. Pavy. Source: Wellcome Collection.

Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.

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    personally studied tlie mode of formation of the osazone, and have prepared several quantities of it, my preparations being in every way identical with Dr. Pavy’s. I now propose to describe my experiments, and to state the conclusions which I am able to draw from them. I. Osazone prepared from the Product of the Successive Action of Potash and Sulphuric Acid on Albumin. Sample A.—This consisted of bunches or sheaves of light yellow well-defined needles, and melted at 205° to 206° with decomposition. It contained a minute trace of ash. Analysis of the substance, after being dried at 100°, gave the following results : (I) 0T576 gave 0-3474 C03 and 0-0856 EDO. (II) 0T101 gave 15-25 c.c. moist nitrogen at 24-5° and 757 mm. (III) 0T148 gave 15‘95 c.c. moist nitrogen at 23’5° and 752-5 mm. Calculated. CoH ioO*(N jHC6H 514 I. C . 60-33 . 60 11 . H . 6-14 . 603 . . 15-64 . — A portion was re-ci’ystallised from alcohol in pre- sence of extracted animal charcoal. It was then much brighter in colour, aud melted with decomposition at 207° to 208°. Found. II. III. — . — per cent. 15-41 . 15-44