Outlines of practical physiology : being a manual for the physiological laboratory, including chemical and experimental physiology, with reference to practical medicine / by William Stirling.

  • Stirling, William, 1851-1932.
Date:
1902
Catalogue details

Licence: Public Domain Mark

Credit: Outlines of practical physiology : being a manual for the physiological laboratory, including chemical and experimental physiology, with reference to practical medicine / by William Stirling. Source: Wellcome Collection.

    31/690 (page 25)
    PRACTICAL PHYSIOLOGY. PART I.—CHEMICAL PHYSIOLOGY. LESSON I. PROTEIDS. Students are required to bring the following:—One dozen f-inch test tubes, with stand and brush; one 4-oz. and one 6-oz. flask ; two beakers, No. 2 size ; two porcelain capsules, No. 3 size ; two funnels; glass rods ; pipette graduated from 50 to 5 c.c. ; platinum wire in holder ; Bunsen burner ; wire gauze ; tripod ; india-rubber tubing; and duster. As a type of this group take white of egg, egg-white, or egg- albumin. In nature proteids occur only as constituents or products of living organisms, and their presence is indispen¬ sable for the occurrence of the phenomena of life. In animals they form the principal organic solids of the muscular, nervous, and glandular tissues, and also of blood-plasma and lymph. Normally they are absent—or practically so—from bile, urine, tears, and sweat. They possess certain chemical reactions in common, and are closely related to one another. Their elemen¬ tary composition varies within the following limits :— C. H. N. 0. s. From 50 6-8 15-0 22 ‘8 o'4 per cent. To 55 7‘3 i8’2 24’I 5'° For the most part they are amorphous and colloid, but many representatives have now been crystallised. The question of solubility is an important one. All are insoluble in alcohol or ether; some are soluble in water, others insoluble. Some (globulins) are soluble only in dilute saline solutions. Many are