AT the beginning of this century, one of the facts most intriguing to chemists was the impossibility of concentrating some of the radioactive elements. Radium D, for example, a substance well ...

During a nuclear stress test, you’ll be injected with a radioactive dye called a tracer. Some of this tracer will remain in your system for a time after the test. A nuclear stress test is a type of ...

THIS note gives a brief account of a radioactive tracer technique for the detection and estimation of the short-lived aliphatic free radicals; it is being used in both dynamic and static experiments.