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Biol Bull 46: 165-177. (April 1924)
© 1924 Marine Biological Laboratory
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THE SUSCEPTIBILITY OF CELLS TO RADIUM RADIATIONS

CHARLES PACKARD 1

1 PEKING UNION MEDICAL COLLEGE, DEPARTMENT OF BIOLOGY

1. The susceptibility of Paramoeligcium to radium radiations (chiefly the slowest beta rays) varies with the temperature at the same rate as do physiological reactions of various kinds.

2. The susceptibility also varies directly with the degree of permeability of the surface layer of the cell.

3. The slow beta rays act on the surface layer of the cell, increasing its permeability, and if allowed to act long enough, causing a typical cytolysis. In this respect they resemble other types of radiant energy, and diverse chemical cytolytic agents.

4. Cells which have a relatively high permeability are more susceptible than those having low permeability, for the cytolytic action of the rays is quickly followed in the former by a cytolysis which is irreversible, while in the latter it is reversible.

5. It is suggested that this increase in permeability, following brief exposures, is the cause of the acceleration in division rate seen in Paramoeligcium and in other cells and tissues.






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Copyright © 1924 by the Marine Biological Laboratory.