. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 404 D. WHITE AND J. R. MARSDEN QX Q X max 450 500 550 600 FIGURE 10. Emission spectra of cyan specific fluorescence in cerebral neurons (solid line) and for noradrenalin (dotted line) in model droplets ( M). was so low that it could not be read by the photomultiplier tube at the amplifications employed for measurement of specific neuronal fluorescence. Cyan fluorescence. The cyan fluorescing cells and nerve fibers in the cerebral ganglion, circumoesophageal connectives, prostomial nerves and other ganglia of
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 404 D. WHITE AND J. R. MARSDEN QX Q X max 450 500 550 600 FIGURE 10. Emission spectra of cyan specific fluorescence in cerebral neurons (solid line) and for noradrenalin (dotted line) in model droplets ( M). was so low that it could not be read by the photomultiplier tube at the amplifications employed for measurement of specific neuronal fluorescence. Cyan fluorescence. The cyan fluorescing cells and nerve fibers in the cerebral ganglion, circumoesophageal connectives, prostomial nerves and other ganglia of N. wrens all display an emission spectrum with a well defined maximum at 475 to 480 nm, (Fig. 10), characteristic of the catecholamines dopamine, noradrenalin and adrenalin (Ritzen, 1966; Bjorklund et a!., 1972). However, adrenalin, a secondary catecholamine, requires more energy during dehydrogenation with for- maldehyde due to the formation of a quaternary nitrogen in the indole nucleus (Jonsson, 1967), and a longer incubation time may, therefore, be required to bring about the formation of the adrenalin fluorophore (Corrodi and Jonsson, 1967). N. vircns tissue sections were incubated for an additional 2 hours, but this proce- dure did not result in new fluorescing structures or in any increase in the intensity of fluorescence. The photodecomposition rate for the cyan fluorescence corre- sponded more closely to that for the noradrenalin standard than did the yellow. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
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