Abstract
Conclusions
1) The neural lobe of the beaver pituitary contains approximately 2 units of oxytocic, pressor and antidiuretic activity/mg dry weight. The stalk contains about 0.4 unit of pressor and oxytocic activity/mg. 2) The pressor-oxytocic and pressor-antidiuretic ratios of neural lobe extracts were similar to those of the U.S.P. standard pituitary powder. 3) The anterior lobe contains appreciable melanophore-expanding activity but no oxytocic, pressor or antidiuretic activity.
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