| Active principles | Rating | Bibliogr. | Expand | |
|---|---|---|---|---|
| 1 | Radioisotopes | 100 | + | |
| 2 | Carbon Isotopes | 17 | + | |
| 3 | Iodine Isotopes | 12 | + | |
| 4 | Phosphorus Isotopes | 11 | + | |
| 5 | Strontium Isotopes | 7 | + | |
| 6 | Sulfur Isotopes | 6 | + | |
| 7 | Yttrium Isotopes | 5 | + | |
| 8 | Deuterium | 4 | + | |
| 9 | Cobalt Isotopes | 4 | + | |
| 10 | Zinc Isotopes | 3 | + | |
| 11 | Gallium Isotopes | 3 | + | |
| 12 | Nitrogen Isotopes | 3 | + | |
| 13 | Cesium Isotopes | 3 | + | |
| 14 | Calcium Isotopes | 2 | + |