| Active principles | Rating | Bibliogr. | Expand | |
|---|---|---|---|---|
| 1 | Iron Isotopes | 100 | + | |
| 2 | Carbon Isotopes | 91 | + | |
| 3 | Radioisotopes | 67 | + | |
| 4 | Deuterium | 50 | + | |
| 5 | Zinc Isotopes | 45 | + | |
| 6 | Calcium Isotopes | 42 | + | |
| 7 | Nitrogen Isotopes | 28 | + | |
| 8 | Oxygen Isotopes | 23 | + | |
| 9 | Phosphorus Isotopes | 7 | + | |
| 10 | Iodine Isotopes | 4 | + |