. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. DARK , (CONTROL ; PHOTOREACTIVATFD. ULTRAVIOLET, DARK 120 140 160 180 200 220 TIME IN MINUTES AFTER INSEMINATION 240 260 FIGURE 5. Photoreactivation of ultraviolet injured sperm. Sperm \\ere injured with 5n of X2654A ultraviolet, photoreactivated with 4086 ergs/mm.' of X4350A blue light, then used to fertilize normal eggs. Cleavage delay in the resulting xygotes is shown. Xote the retardation of cleavage in the blue light control. in zygotes from such injured sperm. An action spectrum has been worked out which show
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. DARK , (CONTROL ; PHOTOREACTIVATFD. ULTRAVIOLET, DARK 120 140 160 180 200 220 TIME IN MINUTES AFTER INSEMINATION 240 260 FIGURE 5. Photoreactivation of ultraviolet injured sperm. Sperm \\ere injured with 5n of X2654A ultraviolet, photoreactivated with 4086 ergs/mm.' of X4350A blue light, then used to fertilize normal eggs. Cleavage delay in the resulting xygotes is shown. Xote the retardation of cleavage in the blue light control. in zygotes from such injured sperm. An action spectrum has been worked out which shows that this wavelength is near the peak of efficiency for ultraviolet in- jury to sperm, and a detailed comparison of ultraviolet effects on eggs and sperm has previously been made (Giese, 1946, 1949). The most obvious effect of ultra- violet light injury to sperm is retardation in the cleavage of xygotes resulting when injured sperm are used to fertilize eggs. Even after quite large dosages of ultra- violet, the sperm remain motile and activate the eggs. Visible light is also very harmful to sperm. Its effects will be reported in detail elsewhere, but it is necessary to present some of the data here, in connection with photoreactivation in sperm. The visible light injury is qualitatively different from ultraviolet light injury. Sperm exposed to visible light become immotile and fail. 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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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
