[Late nonstochastic sequelae of gamma irradiation of lymphoid cells]

In experiments with a suspension culture of human Raji lymphoid cells it was shown that a 40 per cent deceleration of the population growth induced by 2.5 Gy gamma-radiation persisted within the following 15-16 generations, afterwards it gradually normalized to reach the control level in the 21st generation. However, the incompleteness of recovery was displayed with the repeated exposure and cultivation of cells under hyperthermia (40 degrees C) up to the 27th generation.