抄録
1) Yeast cells were irradiated at certain incubation times. The effect was analysed in the two factors; delay of division and lethality of the cell.
2) The delay of division was greatest in the cells irradiated at zero incubation time, and was rapidly decreased to its minimum at 3 or 4 hour incubation time, and was increased again to its stational value thereafter.
3) The lethality was gradually decreased from irradiation at zero incubation time to that at protracted incubation time, and was reached stational value at 10 or 12 hours.
