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Thesis (M.S.)—University of Nebraska—Lincoln, 1954. Department of Psychology.


Copyright 1954, the author. Used by permission.


Attempts were made to find out whether protein derivatives have the ability to counteract the toxic action of potassium on the heartbeat.

This study concludes that the amountof potassium that stops the heart varies in each individual heart.Within certain limits, potassium does not seem to show any effect in a short time perfusion.

Amino-acids and other protein derivatives used in these experiments did not show any toxic effect by themselves when used in Ringer’s solution.

When amino-acids were used with the exact amount of potassium that would stop the heart, no beneficial action was observed, but the heart shows a subsequent resistance to potassium toxicity.

Advisor: Leonard Nelson