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Biol Bull 112: 249-253. (April 1957)
© 1957 Marine Biological Laboratory
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THE REVERSIBLE REPLACEMENT OF POTASSIUM BY RUBIDIUM IN ULVA LACTUCA

GEORGE T. SCOTT 1 and ROBERT DeVOE 1

1 Department of Zoology, Oberlin College, Oberlin, Ohio and the Marine Biological Laboratory, Woods Hole, Massachusetts

1. Rubidium ion replaces two-thirds of the potassium of Ulva lactuca within four hours after being placed in rubidium-containing sea water.

2. The rubidium concentration does not increase more than 5 meq. during the remainder of the experiment.

3. Potassium re-accumulation in running sea water is slower than the initial exchange of rubidium ion for potassium ion.

4. The disparity in the exchange kinetics is discussed.






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Copyright © 1957 by the Marine Biological Laboratory.