Sex-linked recessive lethal test of Drosophila melanogaster after exposure to 50-Hz magnetic fields. |
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Authors: | Y Otaka S Kitamura M Furuta A Shinohara |
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Institution: | Mitsubishi Kasei Institute of Toxicological and Environmental Sciences, Kashima Laboratory, Ibaraki, Japan. |
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Abstract: | To determine whether a 50-Hz magnetic field will induce mutations, a sex-linked recessive lethal test of Drosophila melanogaster was performed. Adult flies were exposed at an rms flux density of 500 mu T or 5 mT to the homogeneous field of a Helmholtz coil. The ambient field to which controls were exposed was less than 1 mu T. Exposures took place continuously for 13 to 14 days, which correspond to the life cycle of Drosophila at 25 degrees C. About 10,000 X-chromosomes were tested at each flux density. Recessive lethal mutation rates of 0.13, 0.21, and 0.18 percent were observed, respectively, for control, 500-mu T, and 5-mT conditions. By the Kastenbaum-Bowman significance test, the recessive lethal mutation rates in the 500-mu T and 5-mT conditions did not differ from the mutation rate of controls. |
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Keywords: | ELF drosophila mutation X-chomosome helmholtz coil |
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