title: [Cytogenetic effects induced in vitro in human peripheral blood lymphocytes by neutrons. II. Relative biological effectiveness of neutrons having different energies].
abstract: Human lymphocytes were irradiated in vitro during Go stage by graded doses of thermal neutrons and neutrons having an average energy of 0.04; 0.09; 0.35; 0.85 and 14,7 MeV as well as by 60Co gamma rays, and RBE of neutrons relative to gamma-rays was calculated for the frequency of total and different types of aberrations. It was found that the RBE has the most value at the low doses and decreases when the exposition dose increases. 0.35 MeV neutrons have the maximum RBE in comparison with neutrons having other energies. When comparing the RBE values calculated for different types of chromosome aberrations, it was found out that dicentrics and dicentrics plus centric rings had more RBE than acentric aberrations (pair fragments and minutes).
mesh_terms: D002877:Chromosomes, Human / Q000528:radiation effects*; D003037:Cobalt Radioisotopes; D004307:Dose-Response Relationship, Radiation; D005720:Gamma Rays; D006801:Humans; D066298:In Vitro Techniques; D008214:Lymphocytes / Q000528:radiation effects* / Q000648:ultrastructure; D009502:Neutrons; D012062:Relative Biological Effectiveness
chemical_list: D003037:Cobalt Radioisotopes
vernacular_title: Tsi togeneticheskie éffekty, indutsiruemye neĭtronami v limfotsitakh perifericheskoĭ krovi cheloveka in vitro. Soobshchenie II. Otnositel'naia biologicheskaia éffektivnost' neĭtronov raznykh énergiĭ.