Abstract
Abstract LAF1 mice were treated with a total-body dose of 800 r. x-ray. The dry mass distribution of the femur bone marrow cells was determined at different intervals postirradiation. The nonproliferating cells showed no significant dry mass change, whereas the proliferating cells of the myelocyte series had a steady increase in mean dry mass per cell. Few cells with the maximum dry mass increase survived at the end of 48 hours postirradiation. The dry mass distribution formed characteristic patterns for each postirradiation interval studied as the proliferating cells shifted to higher dry mass values with accompanied increase in cell sizes.
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