action - something that you do protective - (being) something that protects protective action - things you do, to protect yourself or other people (from something) recomâ¦mendations - someone has done some research; this is a list of what they think is good protective action recommendations - a list of things someone thinks you should do to protect ...
Stable isotope analysis gives an independent measure of fractionation such that if, for instance, a sample is 1.5% heavier in 13C than modern standard carbon through the effects of fractionation, then it will be 3% heavier in 14C than it would have been had fractionation not taken place.
Research activity with thallium is ongoing to develop high-temperature superconducting materials for such applications as magnetic resonance imaging, storage of magnetic energy, magnetic propulsion, and electric power generation and transmission.03 Tl and 205 Tl are the only stable isotopes, and 204 Tl is the most stable radioisotope, with a half-life of 3.78 years. 202 Tl (half-life 12.23 days) can be made in a cyclotron, while 204 Tl is made by the neutron activation of stable thallium in a nuclear reactor.