title: The problem of viability estimates in tests for reverse mutations.
mesh_terms: D002470:Cell Survival; D004988:Ethers, Cyclic / Q000494:pharmacology*; D009153:Mutagens / Q000494:pharmacology*; D009154:Mutation / Q000187:drug effects / Q000528:radiation effects; D009491:Neurospora; D009603:Nitroso Compounds / Q000494:pharmacology*; D011831:Radiation Genetics; D014466:Ultraviolet Rays; D014520:Urethane / Q000494:pharmacology
chemical_list: D004988:Ethers, Cyclic; D009153:Mutagens; D009603:Nitroso Compounds; D014520:Urethane