Sentences with phrase «amount of radioactive substance»

Intended as a critique of the Copenhagen interpretation of quantum mechanics, and eventually becoming the go to example for illustrating the difficulty of describing quantum states, Albert Einstein's buddy devised the following scenario: a cat, a Geiger counter containing a trace amount of radioactive substance, and a flask filled with poison are placed in a sealed and shielded box.

Using a small amount of a radioactive substance as a tracer, the scientists focused on the brain's mu - opioid system in which chemicals called endogenous opioids bind to receptors and hinder the spread of pain messages in the brain.

Gummer approved limits for the amounts of radioactive substances that can be released from the Sellafield complex with a few minor changes.