Sentences with phrase «radioactive elements which»

PET employs the antiparticle of the electron, the positron, that is emitted by radioactive elements which can be attached to biologically active molecules that target specific sites of the body.

thorium A naturally radioactive element which appears as a silvery metal when it is pure.

Not exact matches

The discoveries and scientific creations of recent years in the field of nuclear energy, transforming our period into a new power age, are directly traceable to the discoveries of radioactive elements by Becquerel and the Curies, inaugurating the new physics.9 A new depth of relations and energy revealed in both earlier and more recent experiments has routed the world - view of mechanism which Newton and his followers through the nineteenth century had come to take for granted.

In a new study, Scripps Institution of Oceanography at the University of California San Diego Professor James Day and colleagues examined the chemical composition of zinc and other volatile elements contained in the green - colored glass, called trinitite, which were radioactive materials formed under the extreme temperatures that resulted from the 1945 plutonium bomb explosion.

But also new elements are created in the hot ejecta of the explosion, among them radioactive species such as 44Ti (titanium with 22 protons and 22 neutrons in its atomic nuclei) and 56Ni (28/28 neutrons / protons), which decay to stable calcium and iron, respectively.

«It's not only fracking fluids that pose a risk; produced water from conventional, or non-fracked, oil and gas wells also contains high levels of radium, which is a radioactive element.

Members of a team led by paleoanthropologist Isaiah Nengo estimated the fossil's age by assessing radioactive forms of the element argon in surrounding rock, which decay at a known rate.

Soil at the spill sites was contaminated with radium, a naturally occurring radioactive element found in brines, which chemically attached to the soil after the spill water was released.

The human body takes up strontium, for example, as if it were calcium, which is why the radioactive form of the element can collect in teeth, nails and bones, causing serious health problems such as bone cancer.

Williams looked at the radioactive elements uranium and thorium trapped in these calcite crystals, using them as a kind of clock based on the rate at which uranium decays into thorium.

The unstable element, which will remain radioactive for millennia, is the residue of ill - fated efforts to recycle used nuclear fuel.

Antineutrinos are a by - product of the fission in a nuclear reactor, in which an atomic nucleus of a radioactive element such as plutonium splits into lighter elements.

But the buildup of heat from the decay of radioactive elements in the interior then remelted parts of the mantle, which began to erupt onto the surface some 500 million years after the Moon's formation, pooling in impact craters and basins to form the maria, most of which are on the side of the Moon facing the Earth.

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.

These contain traces of the radioactive elements uranium and thorium, which indicate when the deposits formed — and therefore give a minimum age for whatever lies beneath.

These contain traces of the radioactive elements uranium and thorium, which indicate when the deposits formed - and therefore give a minimum age for whatever lies beneath.

Scientists have long suspected that these elementary particles, which are produced by the decay of radioactive elements, have a unique trait — they can change, or «oscillate,» between their three known types, or «flavors» — the electron neutrino, the muon neutrino and the tau neutrino.

These particles, which are produced by the decay of radioactive elements, have a unique trait — they can change, or «oscillate,» between their three known types, or «flavors» — the electron neutrino, the muon neutrino and the tau neutrino.

It is believed to prevent the absorption from the gut by binding toxic elements, which include radioactive strontium, barium, and cadmium.

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.

Many dogs that eat small fish and sardine and herring oil appear to have elevated levels of strontium, a radioactive element that has been released in large quantities from the nuclear power plant involved in the Fukushima disaster, which is still going on.

In any case, no - one is suggesting that the planet's core is getting hotter, which would be needed to actually make our planet warm; to the contrary, the planet will be very slowly cooling as the radioactive elements in the core providing this heat gradually lose their energy.

Coal ash slurry, which is a combination of water and materials leftover from the coal combustion process, contains ingredients that can cause cancer and brain damage as well as radioactive elements.

Beneath the Earth's crust lies the mantle which is heated by the radioactive decay of heavy elements.

If you put a radioactive element into lukewarm soup in a Dewar flask in order to maintain its temperature and put the flask into a refridgerator, then the outside skin of the Dewar would be lower than the inside skin which would be lower than the soup temperature.

SImple experiment: put a sample of a radioactive element (which has a measured temperature) inside of a Dewar flask and measure if the temperature of the radioactive element rises as a result of radiative reflection from the inner walls of the flask.

Seems the radioactive decay of elements is estimated to be ~ 30TW (thought to be ~ 80 % of the earth's internal heating based on Wikipedia) which would result in about 0.1 K of the 33K difference.

Fusion remains the holy grail of clean energy research, because the fusion reaction generates new elements that are not radioactive, unlike nuclear fission which leaves us with hazardous fuel wastes that require generations of management.