[Restoration of the reproductive capacity of irradiated hematopoietic tissue in cultivation].

The reproductive power of the blood forming tissue of irradiated rats (450 rad), cultured in diffusional chambers in vivo, has been followed for 30 days. The cultivation of bone marrow of the control donors did not change the intensity of ultra-violet fluorescence, compared to the similar cells in situ. The differentiation capacity of bone marrow, taken from animals irradiated half a year before, became weaker in diffusion culture conditions. These changes coincided in time with the appearance of some abnormalities in blood forming tissue of the irradiated animals.