Some percent may be refined for an isotope.Logical formLearned from3 sentences. An isotope may undergo a refining.Logical formLearned from3 sentences. An isotope may make for uranium.Logical formLearned from3 sentences. Doses may pertain-to an (isotope polonium).Logical formLearned from3 sentences. A refinement can be for an isotope.Logical formLearned from3 sentences. A radioactive isotope can be polonium-210 in an incident.Logical formLearned from3 sentences. A person may have a quantity of an (isotope polonium-210).Logical formLearned from3 sentences. Contamination can be by traces of an isotope.Logical formLearned from3 sentences. A person may be poisoned by a radioactive isotope.Logical formLearned from3 sentences. A person may be poisoned with a radioactive isotope.Logical formLearned from3 sentences. Levels can be constituted-of-or-filled-with (oxygen isotopes).Logical formLearned from3 sentences. Higher levels may pertain-to an isotope.Logical formLearned from3 sentences. A cyclotron can be for making radioactive isotopes.Logical formLearned from3 sentences. Some isotopes can be in remains.Logical formLearned from3 sentences. Isotopes may deca at a speed.Logical formLearned from3 sentences.