title: Effects of 645 MeV and 9.2 GeV protons on Artemia eggs.
abstract: Developmental capacities of Artemia eggs have been studied after exposure to 645 MeV or 9.2 GeV protons. Effects of proton irradiation were studied in comparison with 60Co gamma ray irradiation, endpoints being emergence, hatching and 4-5 day old live nauplii percentages. Effectiveness of 645 MeV protons is greater than that of 9.2 GeV protons. R.b.e. values calculated for nauplius survival is 2.3 for 645 MeV protons and 1.5 for 9.2 GeV protons. These results can be taken into account in radiation hazard estimation during space flights.
mesh_terms: D000818:Animals; D001156:Artemia / Q000196:embryology / Q000528:radiation effects*; D004307:Dose-Response Relationship, Radiation; D005260:Female; D005720:Gamma Rays; D008297:Male; D010063:Ovum / Q000254:growth & development / Q000528:radiation effects*; D011522:Protons; D012062:Relative Biological Effectiveness; D013997:Time Factors
chemical_list: D011522:Protons