. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. I'HOTOKKAlTIVATIOX IX A SKA L'R( 111\ 167 TABLIC I Representative photoreactivation data from various wavelengths of ultraviolet light, keeping the visible, light dosage con sin ut. Controls are taken as zero delay. Wavelength of ultraviolet, in Angstrom units Dosagr of ultraviolet, in ergs m Cleavage delay, in minutr-; ultraviolet Cleavage delay, in niinnir . photoreactivated Per cent photoreactivation Control 0 0 0 0 2450 750 37 18 51 2450 1 500 55 18 31 2537 750 76 1') 75 2537 750 36 6 83 2537 1 500 93 40 57 2654 750
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. I'HOTOKKAlTIVATIOX IX A SKA L'R( 111\ 167 TABLIC I Representative photoreactivation data from various wavelengths of ultraviolet light, keeping the visible, light dosage con sin ut. Controls are taken as zero delay. Wavelength of ultraviolet, in Angstrom units Dosagr of ultraviolet, in ergs m Cleavage delay, in minutr-; ultraviolet Cleavage delay, in niinnir . photoreactivated Per cent photoreactivation Control 0 0 0 0 2450 750 37 18 51 2450 1 500 55 18 31 2537 750 76 1') 75 2537 750 36 6 83 2537 1 500 93 40 57 2654 750 56 11 2654 750 51 14 2654 1500 71 20 2804 750 90 26 71 3025 750 37 11 70 3130 6000 14 2 86 tion in the sensitivity to ultraviolet injury in eggs from different females. It seems, however, from the data available (Figure 2 and Table I), that there is strikingly less reactivation from A2450A injury than from injury by other wavelengths. Furthermore, there is a marked unilateral effect in raising of the membrane at 100 Q u Q_ C/l O --©-®-O-DARK CONTROLS -O—©-LIGHT CONTROLS -•€>—<*-PHOTOREAGTIVATED 0 ^-ULTRAVIOLET DARK MINUTES. 0 80 100 TIME IN 160 INSEMINATION FIGURE 3. Photoreactivation of zygotes formed from eggs injured by 750 of \2654A ultraviolet light. Visible light exposure of 1--{, used in the experiments of Figure 1 and Figure 2, was immediately after fertilization. Photoreactivation of per cent was 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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