RESUMO
Since variations in the electric skin impedance delta R depend on an instantaneous value R, parameters of the cutaneogalvanic reaction should be assessed in the scale of the natural logarithm lnR. Such methodology allows an adequate comparison of results obtained in many patients or in a single patient during a long-term period.
Assuntos
Resposta Galvânica da Pele , Humanos , MicrocomputadoresRESUMO
In experiments of on rats a study was made of late effects of chronic action of tritium oxide (3HOH) during 6 months (37 X 10(4) Bq/g/day) and external gamma-radiation (137Cs) which were delivered in comparable daily and cumulative doses. It was shown that 3HOH produced a more pronounced blastomogenic effect. The RBE coefficient of tritium oxide approximated 1, with a reference to the average life shortening, and 4.2 and 2.5, with a reference to the incidence of malignant tumors and leukoses, respectively.
Assuntos
Neoplasias Induzidas por Radiação/etiologia , Trítio , Água , Animais , Radioisótopos de Césio , Raios gama , Leucemia Induzida por Radiação/etiologia , Leucemia Induzida por Radiação/mortalidade , Masculino , Neoplasias Induzidas por Radiação/mortalidade , Doses de Radiação , Ratos , Ratos Endogâmicos , Eficiência Biológica Relativa , Fatores de TempoRESUMO
The kinetics of cell movement through the compartment of maturing, nondividing neutrophils of the Wistar rat bone marrow was studied by autoradiography using H3-thymidine. There were transit and reserved neutrophil populations in each cell compartment. The transit periods of the maturing nondividing cells, the mean time of cell renewal in the subcompartments of metamyelocytes, the band and the sementonuclear neutrophils were determined with consideration to the reserved cell population.