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Biol Bull 66: 346-350. (June 1934)
© 1934 Marine Biological Laboratory
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THE CONCENTRATION OF EOSIN AND THE PHOTODYNAMIC EFFECT ON TENTACLES OF A TEREBELLID WORM

JOHN H. WELSH 1

1 From the Bermuda Biological Station for Research and the Biological Laboratories, Harvard University

The tentacles of Terebella magnifica, W. are satisfactory for the study of certain photodynamic phenomena. The toxic effect of eosin in the presence of light depends upon the concentration of the dye. As the concentration increases, the killing-time decreases to a minimum and then increases linearly over a certain range. This secondary increase is probably due to absorption of light by the overlying layer of eosin.






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Copyright © 1934 by the Marine Biological Laboratory.