[Radiosensitivity of clonogenic cells of Ehrlich ascites carcinoma forming colonies in semiliquid agar in diffusion chambers].

A study was made of the dependence of survival of Ehrlich ascites tumor clonogenic cells on the 3d and 7th days following inoculation upon radiation dose (60Co-gamma-rays) delivered under well oxygenated in vitro conditions. No differences were detected in radiosensitivity of 3- and 7-day Ehrlich ascites tumor cells: in both cases, the "dose-effect" curves were S-shaped with a small shoulder and close D0 values.