title: Irradiation at different times of the day. Morphology and kinetics of the small intestine.
abstract: Rats were irradiated at different time of the day with sublethal doses on the abdomen only, and qualitative and quantitative morphologic modifications were determined. The experiments seemed to be demonstrate that in the groups irradiated at night and at the end of the light period early injury is not severe whereas in the group irradiated at the end of the dark period repair of the injury seems to be more effective.
mesh_terms: D000818:Animals; D002452:Cell Count; D002467:Cell Nucleus / Q000528:radiation effects; D002940:Circadian Rhythm; D003037:Cobalt Radioisotopes; D004848:Epithelium / Q000528:radiation effects; D005260:Female; D007421:Intestine, Small / Q000473:pathology / Q000528:radiation effects*; D008940:Mitotic Index; D051381:Rats; D011919:Rats, Inbred Strains; D013936:Thymidine
chemical_list: D003037:Cobalt Radioisotopes; D013936:Thymidine