Abstract
In 1917, Myers and Killian 1 published a simple, delicate and accurate method for estimating the activity of the blood. Briefly, the method consists in allowing a known quantity of blood (2 c.c.) to act on a known quantity of pure soluble starch (1 c.c. of a 1 per cent. solution = 10 mg.) for a definite length of time (fifteen minutes) in a water bath at 40 C. The glucose thus produced by the blood diastase is then determined by the Myers and Bailey method. 2 A control is run in a second tube to determine the original glucose contained in the 2 c.c. of blood, which is deducted from the total glucose found in the first tube. The results are recorded in terms of the percentage of the starch (10 mg.) transformed to reducing sugar (calculated as glucose) by the 2 c.c. of blood employed. Thus, by a diastatic
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