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- W2070793977 abstract "The visual system as an interface between the environment and the living organism can serve as a sensitive indicator especially in studies that deal with effects of radiation. The crab retina as the seat of the photoreceptors and the lamina ganglionaris as the place of second order neurons were the targets of our study. Conventional specimen preparation techniques for transmission electron microscopy (TEM) are adequate to preserve any modifications that may occur as a consequence of the experimental treatment. In this study we analyzed by TEM how retinal and lamina ganglionaris cells of the crab Ucides cordatus responded to a 30 min exposure to ultraviolet C (UV-C) and ultraviolet B (UV-B) radiation with doses of 7200 and 590J/cm(2), respectively. The results show that damaged cells occurred in both retina and lamina ganglionaris, but that the retinal cells were affected to a greater extent. Morphological alterations of the pigment granules and an increase in the quantity of lipid droplets of the retinal cells were also observed. Additional changes include an increase in heterochromatin, nuclear karyolyses and karyorrhexes, distention of rough endoplasmic reticulum and mitochondrial disruptions. The observed morphological changes are indicative of apoptotic processes and show that an exposure to light of wavelengths of 254 and 312 nm may be injurious to the visual system of invertebrates." @default.
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- W2070793977 date "2002-01-01" @default.
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- W2070793977 title "Ultrastructural study of first and second order neurons in the visual system of the crab Ucides cordatus following exposure to ultraviolet radiation" @default.
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- W2070793977 doi "https://doi.org/10.1016/s0968-4328(02)00030-6" @default.
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