浸漬後再乾燥処理を行ったアルテミア卵の孵化とその放射線感受性

概要

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Dry eggs of Artemia were hydrated in 2% NaCl solution at 4℃ or 27℃ for various periods up to 10 hours (prehydration), and then re-desiccated with the sid of a vacuum pump. 1) Time-length necessary for hatching of these redesiccated eggs was found to be nearly the same as that of non-treated dry eggs. 2) The eggs pregydrated at 4℃ showed no difference in hatchability according to the length of prehydration. Hatchability of the eggs pregydrated at 27℃, decreased gradually with an increase in length of prehydration. 3) Prehydration treatment repeated up to 7 times resulted in no remarkable damage to the viability of the eggs. 4) Radiosensitivity of the re-desiccated eggs after prehydration at 4℃ up to 7 hours was not different from that of non-treated dry eggs. The prolongation of prehydration over 3 hours at 27℃ caused a gradual decrease in hatchability of the eggs. The relative radiosensitivity of these eggs, however, was found to be approximate to that of dry eggs.
1966-03-15