| Each appropriate region was scraped individually and radioactivity was determined in a scintillation counter. |
| In the first five years, the reactors will undergo mild surface-level deactivation to minimize their radioactivity. |
| The results also point the way to the first direct measurements of the total radioactivity of the earth. |
| The radioactivity in the acetate was later found to be incorporated into cholesterol and the liver. |
| There's even a couple of yellow radioactivity warning lights for sinister effect. |
| The becquerel is a unit of radioactivity and corresponds to one radioactive disintegration per second. |
