OSMOTIC STUDIES OF AMPHIBIAN EGGS. III. OVULATED EGGS

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Abstract
1. Studies of eggs of Bufo marinus and of Hyla labialis that have left the ovary indicate that there is no large change in the total amount of water nor of Na and K. 2. A possible interpretation of the data is that after the eggs have left the ovary there is a decrease in their permeability to water and to Na and K. 3. A statistically significantly higher quantity of K in these eggs might suggest a change in the binding-capacity of the egg proteins. 4. If such a change does occur, there might be a decrease in the amount of water bound to the proteins which might explain the lower osmotic pressure of eggs that have left the ovary. Attempts to obtain experimental data to support this hypothesis failed for technical reasons.

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