. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. THE LUMINESCENCE OF LUMINODESMUS 123. 10 20 30 40 .0034 .0036 TEMPERATURE- °C. I/T-ABSOLUTE FIGURE 3. (A) Effect of temperature upon luminescence. Ordinate, light intensity in arbitrary units. See text for details. (B) Data of Figure 3A plotted according to the Arrhenius equation. Ordinate, light intensity in arbitrary units plotted on a log scale; abscissa, the reciprocal of absolute temperature. luminous bacteria, although the spectrum of bacterial emission may depend upon the density of the suspension (Harvey, 1952). 4. E
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. THE LUMINESCENCE OF LUMINODESMUS 123. 10 20 30 40 .0034 .0036 TEMPERATURE- °C. I/T-ABSOLUTE FIGURE 3. (A) Effect of temperature upon luminescence. Ordinate, light intensity in arbitrary units. See text for details. (B) Data of Figure 3A plotted according to the Arrhenius equation. Ordinate, light intensity in arbitrary units plotted on a log scale; abscissa, the reciprocal of absolute temperature. luminous bacteria, although the spectrum of bacterial emission may depend upon the density of the suspension (Harvey, 1952). 4. Effect of temperature The effect of temperature upon the luminescence was determined using both intact organisms and eviscerated specimens. The results were essentially the same in both cases. The specimen was held in place in a test tube by a cotton plug. Temperatures were adjusted by holding the tube in a water bath, and the tempera- tures plotted are those read from a thermometer placed in the tube beside the speci- men. The tube was then quickly removed from the bath and placed in front of the phototube. The data from one experiment with an eviscerated specimen are plotted in Figure 3, along with a plot of the data according to the Arrhenius equation. The Q10 for the process is between 10° and 20°; between 15° and 25°; and between 20° and 30°. The sharp decrease in luminescence above the optimum of ° is most likely the result of heat denaturation of enzymes. The activation energy for the over-all process may be calculated from the slope of the straight line drawn in the Arrhenius plot. The value obtained in this case is about 12,000 calories. 5. Effect of varying oxygen concentration The effect of oxygen concentration upon the luminescence was determined quantitatively, using both whole animals and eviscerated specimens. Both gave. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readabi
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
