The term “specific activity” is defined as the amount of radioactivity – or the decay rate – of a particular radionuclide per unit mass of the radionuclide. For example, the specific activity of Ra-226 is 1, meaning that one gram of Ra-226 contains one (1) curie (assumed to be uni...
A. V. ChesnokovRussian Science Center Kurchatov Institute, Moscow, RussiaSpringer USAtomic EnergyVolkov VG, Stepanov VE, Urutskoev LI, Chesnokov AV (2009) Radiometric methods of measuring the specific activity of radionuclides of the uranium series. At Energy 107:400–405...
observed in non-mammalian species, including birds and fish. Biochemical analysis revealed that zebrafish brain slices could convert pregnenolone to progesterone, suggesting a 3β-hydroxysteroid dehydrogenase isomerase activity [112]. Another sex hormone, progesterone, could also be important for brain func...
Brown, M.A., Johnson, N., Gelis, A.V.et al.Recovery of high specific activity molybdenum-99 from accelerator-induced fission on low-enriched uranium for technetium-99m generators.Sci Rep11, 13292 (2021). https://doi.org/10.1038/s41598-021-92704-z ...
V79 cells were exposed to either U 238-uranyl nitrate, specific activity 0.33 μ Ci / g, or DU-uranyl nitrate, specific activity 0.44 μ Ci / g, delivered at a concentration of 25 μ M for 24 h. Results showed, that at equal uranium concentration, a 1.33-fold increase in specific ...