Sentences with phrase «of radioactive substances»

Many of the radioactive substances do not occur naturally.

The patient is given an injection of a radioactive substance, which gets absorbed in those parts of the heart muscle that have normal blood flow.

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.

Relative dating uses observation of location within rock layers, while radiometric dating uses data from the decay of radioactive substances within an object.

Hayes, along with Sergey Sholom of Oklahoma State University in Stillwater, tested this idea with two AAA battery sized capsules of radioactive substances — cobalt - 60 and cesium - 137.

As you head to the kitchen for your coffee, pause for a moment and contemplate the smoke detector operating silently overhead, a small quantity of the radioactive substance americium - 241 pouring out energy to create a thin beam of charged particles.

In the original version of the thought experiment, which Schrödinger came up with in 1935 to discredit what he felt were apparent contradictions in the interpretation of quantum mechanics, a cat is trapped in a sealed box along with radioactive material and a vial of poison that will shatter if an atom of the radioactive substance decays.

Among the dozens of radioactive substances naturally present in seawater (of which cesium - 137 is one), uranium - 238 and potassium - 40 are the ones present in the greatest abundance.

The HPA press release indicated that there was no risk to human health, and the article correctly quoted the HPA, yet its author found it necessary to talk about the accumulation of radioactive substances in the thyroid gland, leading to cancer.

Such special situations are, for example, hazardous weather events, dispersion of radioactive substances, dangerous chemicals in the air and also different disasters.

A radiologist is a person who makes use of the radioactive substances and X-rays to diagnose diseases in the human body.

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.

Six years after the discovery of radioactivity (1896) by Henri Becquerel of France, the New Zealand - born British physicist Ernest Rutherford found that three different kinds of radiation are emitted in the decay of radioactive substances; these he called alpha, beta, and gamma rays in sequence of their ability to penetrate matter.

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

Since 1949 «no less than 150 million curies (5 × 1018 becquerels) of radioactive substances have been discharged into the environment as a result of Mayak's activities», says the report.