抄録
The change in the extent of biological damage for a given dose by storage after irradiation is called the after-effect. The purpose of the present study is to compare the after-effect between irradiation and heat-treatment.
Artemia dry eggs were exposed to γ-rays (120, 240, 360, 480 and 600 kr) or high temperature (at 100°C for 30, 60, 90 and 120 minutes) and stored at room temperature for varying time (0, 1, 3, 7 and 30 days) after treatment. After the storage period, the eggs were soaked and their hatchabilities were scored at 72 hours after.
Post-irradiation storage of irradiated eggs resulted in a notable decrease in hatchability, and the rate of decrease was much greater in the eggs given higher doses than in those lower ones. On the contrary, storage of heat-treated eggs did not show such an aftereffect.
From this series of experiment, it may be concluded that in its nature the damage induced by irradiation is different from that by heat-treatment.
