The Journal of General Physiology
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The Journal of General Physiology, Vol 7, 741-753, Copyright © 1925 by The Rockefeller University Press

ARTICLE

STUDIES ON LUMINOUS BACTERIA

II. THE INFLUENCE OF TEMPERATURE ON THE INTENSITY OF THE LIGHT OF LUMINOUS BACTERIA.



Thomas F. Morrison 1

1 From the Physiological Laboratory of Princeton University, Princeton, and the Nela Research Laboratories, Cleveland.

1. A method has been described whereby the intensity of the light of luminous bacteria may be measured in a quantitative manner.

2. It is pointed out that the temperature coefficients for light intensity do not follow the van't Hoff rule, but are higher and vary with each 10° temperature interval.

3. From a comparison with other data it is found that the process is not a simple one, but that the observed curve is the resultant of several reactions which proceed simultaneously.

4. The discrepancies in the temperature coefficients in the neighborhood of the "optimum temperature" may be due to a process of coagulation of the colloidal particles of the enzyme. This coagulation will tend to cause a deviation of the curve away from that normal for chemical reactions.

Accepted on May 4, 1925


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