[Cytogenetic research on the blood lymphocytes of rats exposed separately and jointly to 45Ca and 131I].

A cytogenetic study was made of rat blood lymphocytes affected by incorporated 45Ca and 131I delivered separately and in a combination. The cytogenetic effect of a combination of the incorporated radionuclides was lower than that produced by 45Ca alone and, all the more so, lower than the additive effect of 45Ca and 131I.