Effect of X-Irradiation on the Weight and Nucleic Acids of the Embryonic Chick Lens

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Abstract
Ribo-nucleic acid and deoxyribonucleic acid of the chick lens were measured at intervals during embryonic development. Sublethal X-irradiation of chick embryos had no detectable effect on the nucleic acid concentrations in the lenses, either immediately on irradiation or after further periods of incubation. In some experiments, however, a temporary disruption of the weight and ribonucleic acid increases was obtained, so that the irradiated lenses were afterward slightly smaller than normal lenses of the same age and had lower ribonucleic acid contents (but the same concentrations). Radiation, even at high sublethal doses, did not cause visible signs of lens opacities (radiation cataracts).

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