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The author gives a discussion of the methods for determination of amylase, their application to blood and urine and the errors involved. In determining the amylase of the blood, the author found that it was all contained in the plasma, none being present in the corpuscles. Although the amylase of the plasma was rather constant from day to day in the individual case, rather wide differences were found between different individuals. The stability of amylase in the urine was studied and it was found that at temperatures under 40 C. and at a pH from 5.0 to 9.0 the specimens retained their amylase content rather well. The excretion of amylase in the urine was found to be proportional to the concentration in the serum. The author also studied the excretion of creatinine, using a Pulfrich "stufenfotometer" for its determination. The excretion per unit of time was found to be
Om Amylasen i Blod og Urin: Dens Udskillelse gennem Nyren. JAMA. 1937;108(23):1996. doi:https://doi.org/10.1001/jama.1937.02780230056032
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