Radioactive isotopes may be used in medical research.Logical formLearned from4 sentences. (Radio isotopes) may undergo a production.Logical formLearned from4 sentences. (Radioactive isotopes) can be lethal.Logical formLearned from4 sentences. An (isotope uranium-235) can be rare.Logical formLearned from4 sentences. An (isotope production laboratory) may pertain-to a complex.Logical formLearned from4 sentences. A method can be for separatting isotopes.Logical formLearned from4 sentences. Some containers can be constituted-of-or-filled-with radioactive isotopes.Logical formLearned from4 sentences. Some containers of radioactive isotopes may disappear from (metallurgy plants).Logical formLearned from4 sentences. An (isotope cesium) can be radioactive.Logical formLearned from4 sentences. A (rotor tube) may separate isotopes of uranium.Logical formLearned from4 sentences. A venture may purchase isotopes.Logical formLearned from4 sentences. A majority can be constituted-of-or-filled-with some isotopes.Logical formLearned from4 sentences. Isotopes may be reported by a russian government be stolen.Logical formLearned from4 sentences. A (world market value) may pertain-to isotopes.Logical formLearned from4 sentences. A majority of some isotopes may be recovered.Logical formLearned from4 sentences.