| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | caesium 137 | scientific community | Caesium 137 is a radioactive isotope used in scientific research and in the field of nuclear medicine. | 1 |
| 2 | caesium 137 | scientific community | Caesium 137 is a radioactive isotope used in scientific research and as a tracer in environmental studies. | 1 |
| 3 | californium | scientific community | Californium is a rare radioactive metallic element used for research and in nuclear reactors. | 1 |
| 4 | thorium | scientific community | Thorium is considered as a potential future nuclear fuel due to its abundant availability and potential safety benefits. | 1 |