Stories by Jack Schubert

Chelates are molecules that can seize a metal ion in a clawlike structure. Some of these substances are already used in medicine, and the principle seems to have even wider clinical applications

Extracted from beryl, a crystal which is almost identical with emerald, this light metal has found glamorous applications in modern technology. It is also capable of causing a serious disease

The term refers to those radioactive atoms and molecules which, when they enter the human body, tend to accumulate in certain organs and subject them to damaging radiation