Sentences with phrase «radioactive isotope which»

Uranium - 235 is the only fissile radioactive isotope which is a primordial nuclide existing in the nature in its present form since before the creation of Earth.

Not exact matches

In its efforts to diagnose microfractures and abnormal bone that would predispose a horse to a full - blown fracture, researchers at the Equine Sports Medicine Program at Tufts School of Veterinary Medicine have been using scintigraphy, a technique in which a horse is injected with a radioactive isotope that isolates skeletal «hot spots» — places where injured bone is rebuilding itself.

Radiocarbon dating depended upon the discovery cosmic rays, which constantly bombard Earth and turn some carbon atoms in living tissue into radioactive isotope carbon - 14.

The only previously known radioactive carbon isotope at the time was carbon - 11, which had a half - life of only 21 minutes (half the isotope's radioactivity will decay in that time).

The isotope has a half - life of approximately 5,600 years, which means that during this period, half the number of radioactive carbon atoms in any once - living substance will convert to nitrogen.

KATRIN will study neutrinos, which are less than a millionth the mass of an electron, by sifting through the aftermath of radioactive decays of tritium, an isotope of hydrogen with two neutrons.

Murthy discloses that he owns stock in General Electric, Mallinckrodt and Cardinal Health, which are involved in radioactive isotope and cyclotron production He has consulted for Bracco Diagnostics and Ionetix which are also involved in radioactive isotope production.

The Carnegie team focused on a rare isotope of titanium, titanium - 49, because this isotope is the product of radioactive decay of vanadium - 49 which is produced during supernova explosions and transmutes into titanium - 49 with a half - life of 330 days.

Krypton dating is much like the more - heralded carbon - 14 dating technique that measures the decay of a radioactive isotope — which has constant and well - known decay rates — and compares it to a stable isotope.

They studied boulders from the New Zealand site where the glacial wood had been found, measuring the concentrations in the rocks of radioactive isotopes beryllium - 10 and chlorine - 36, which are produced by nuclear reactions between minerals and cosmic rays.

The samples were labeled with radioactive isotopes, which meant that each individual base (the A, T, C, or G) produced a visual signature on film.

«When we got the first inkling that our new mechanism might be useful for developing radioactive tracers, we started looking at Berkeley Lab and its Biomedical Isotope Facility, which was really central to this work,» Levin said.

The method, which has taken Spalding more than a decade to develop, hinges on a massive pulse of radioactive carbon - 14 isotopes released by nuclear explosions in the 1950s and»60s, which doubled the amount of carbon - 14 in the atmosphere.

Fossil fuels lack a type of radioactive carbon, an isotope called carbon - 14, which decays over time.

However, my girlfriend is a geologist, and she looks at natural radiation that comes from rocks, particularly in the south of England — geologists know what elements and radioactive isotopes they have in the ground because nuclear physicists have been able to find out which of these the radiation comes from.

This isotope forms by the radioactive decay of potassium 40, which is sequestered in the rocks deep in Titan's core.

The gamma rays would produce airborne radioactive isotopes such as carbon - 14 and beryllium - 10, which would fall to the ground.

Following a stint in the Air Force, I was approached by a physicist at Washington University in St. Louis named Michel Ter - Pogossian, who pioneered the use of short - lived radioactive cyclotron - produced isotopes in biology and medicine, which to most people was completely novel.

Another product, the atomic bomb, was constructed by way of nuclear reactors that could, in peace time, provide an abundant supply of radioactive isotopes, which are now of great value not only in biophysical research but also in biochemistry and medicine.

According to the Marine Technology Society, brown seaweeds, such as kelp, contain fucoidan and algin, which have been shown to remove lead, mercury, cadmium, barium, tin and other heavy metals from tissues.20 Seaweeds also help remove radioactive isotopes from the body.

Your body will naturally absorb the radioactive isotopes of these elements, which can result in serious illness depending on concentration levels and length of exposure.

Two major dating methods applied to artifacts and fossils are stratagraphic dating (based upon the particular layer of rock of sediment in which the object is found) or radiometric dating (which is based on the decay rates of certain radioactive isotopes).

Uranium dating is one of the ways of determining the age of ancient objects, even one million years old, by measuring how much of the following are present in them: the amount of radioactive isotopes of uranium, and the amount of other materials into which the radioactive isotopes would decompose.

Carbon - 14, which is radioactive, is the isotope used in radiocarbon dating and radiolabeling.

Finally, after a series of radioactive isotopes are formed it becomes lead - 206, which is stable.

The potassium — argon (K — Ar) geochronological method is one of the oldest absolute dating methods and is based upon the occurrence of a radioactive isotope of potassium (40 K), which naturally decays to a stable daughter isotope of argon (radiogenic 40 Ar, also known as 40 Ar *).

Researchers around the world then detected elevated levels of the metal's radioactive isotope, strontium - 90, which entered the global — and especially the American — food supply.

Quite apart from arguments about «responsible solutions» (let's not do that again), an isotope that's radioactive has potential energy — that's what makes it radioactive, after all — so that in principle transmuting it to a more stable isotope * should release energy, which could be harnessed.

One of these is the formation of the radioactive isotope Carbon - 14 in the atmosphere, which plants then absorb.

It's natural uranium which has the radioactive uranium isotope removed from it.