. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 14200 28,400 f I 227600 (daylight) DOSE of X 4350A (ergs/mm*) FIGURE 2. Effect upon division delay in Colpidium of various dosages of blue light (4350 A) after a dosage of 1000 ergs/mm2, of \2654 A. In one case the effect of daylight is compared to the effect of blue light. ferent dosages. A progressively increasing degree of photoreversal occurs with in- creasing doses of blue light. However, even a 16-fold increase from the smallest to the largest tested increased the average photoreactivation only from 56% to


. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 14200 28,400 f I 227600 (daylight) DOSE of X 4350A (ergs/mm*) FIGURE 2. Effect upon division delay in Colpidium of various dosages of blue light (4350 A) after a dosage of 1000 ergs/mm2, of \2654 A. In one case the effect of daylight is compared to the effect of blue light. ferent dosages. A progressively increasing degree of photoreversal occurs with in- creasing doses of blue light. However, even a 16-fold increase from the smallest to the largest tested increased the average photoreactivation only from 56% to 84%. Similar results on bacteriophage have been reported by Dulbecco (1950). The possibility that the mixture of visible wave-lengths as obtained in daylight might be more effective than blue light was tested in an experiment in which the UV- treated colpidia were exposed to indirect daylight for four hours on a bright day. o. 3350 A 3660 A 4050 A 4350 A WAVELENGTH green -t- yellow FIGURE 3. Effect upon division delay in Colpidium of a dosage of 56,900 ergs/mm2, of various wave-lengths of long ultraviolet and visible light after a dosage of 1000 ergs/mm", of \2654 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


Size: 1980px × 1261px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology