Sentences with phrase «radioisotopes 133xe»

And given that the accuracy in dating the years itself using radioisotopes is less accurate than + / - 83 years, this error is negligible.

The scientists nailed down the Arizona rocks» ages by analyzing interspersed volcanic ash layers containing radioisotopes that decay at a predictable rate.

any nuclear reactor wherever located; any nuclear fuel cycle facility; any radioactive waste management facility; the transport and storage of nuclear fuels or radioactive wastes; the manufacture, use, storage, disposal and transport of radioisotopes for agricultural, industrial, medical and related scientific and research purposes; and the use of radioisotopes for power generation in space objects

The TSI is inferred from such things as sunspot records and radioisotopes, which are controversial and not precise.

ANSTO, Australian Nuclear Science and Technology Organisation explains uses of radioisotopes in...

Radioisotopes for carbon changes inform that the carbon comes from old sequestered carbon, like oil, gas and coal deposits.

The appliances of 2014 will have no electric cords, of course, for they will be powered by long - lived batteries running on radioisotopes.

OTOH, bombarding long - lived radioisotopes with neutrons can convert them either to stable isotopes or ones which decay much faster.

Tens of billions of tons of concrete are part of that signature, along with vast amounts of smelted aluminum and more exotic alloys, distinctive spherical particles of fly ash from power plants, bomb radioisotopes, 6 billion tons (and counting) of plastic, and so much more.

Large and small animal nuclear medicine is available and is a subspecialty of radiology in which radioisotopes (compounds containing radioactive forms of atoms) are put into the body to evaluate organ function or localize bone disease such as stress fractures or tumor metastasis.

Properties and uses of radiation from unstable radioisotopes tutorial for chemistry students.

The cause of the heating can not be long - lived radioisotopes; given the primordial concentrations of the isotopes and the expected rate of heat loss, calculations show that the radioactive decay could not have melted Vesta or any other asteroid.

Atomic accelerators bombard nuclei; adding that energy produces radioisotopes and rapid decay.

But what mechanism could have raised the temperatures of the asteroids to this extent if the rocky bodies were too small to retain the heat from long - lived radioisotopes?»

CE: Stars produced radioisotopes.

Saed Mirzadeh is an internationally recognized expert in the research and application of medical radioisotopes and world - renowned authority and leader in all aspects of targeted alpha therapy.

Amino acid cycling in plankton and soil microbes studied with radioisotopes: measured amino acids in soil do not reflect bioavailability.

Energy was also required to form radioisotopes and, in effect, «lift» them high above the floor of the valley of stability; energy was also absorbed in forming some elements heavier than iron.

This program supports scientific advances in the production and use of radioisotopes for research, medicine, and industrial applications for the DOE - SC Office of Nuclear Physics Isotope Program.

Nuclear reprocessing, weapons tests, and nuclear accidents, such as the 2011 catastrophe in Japan, release xenon radioisotopes into the atmosphere.

«People knew that manganese chloride uptakes in the beta cells, but nobody could make radioisotopes that were pure enough.

Emerging molecular imaging agents join tumor - seeking antibodies and signaling radioisotopes in one radiopharmaceutical that is injected at the time of imaging in order to track and report active receptors.

Opponents of the tests have warned that potentially harmful radioisotopes, especially caesium - 137, strontium - 90 and plutonium isotopes, will leach from rocks fractured by the blasts.

Achieving that longer lead time requires blocking Iran's four routes to nuclear weapons: through its Natanz and Fordow uranium enrichment facilities, where thousands of centrifuges separate uranium isotopes; through plutonium production at the Arak heavy water reactor, which Iran says is needed to produce medical radioisotopes; and by way of a covert path involving undisclosed facilities.

Iranian officials say the chief aim of the 40 - megawatt fission reactor, under construction in the central province of Markazi, is to make radioisotopes for medicine.

The agreement, signed today in Vienna, paves the way for a rapid expansion of scientific cooperation with Iran in areas as diverse as fusion, astrophysics, and cancer therapy using radioisotopes.

In the best case, based on a 100 - kiloton blast at a depth of 1000 metres and well away from the edge of the atoll, radioisotopes would take 750 years to reach the limestone, where fissures stretching to the ocean have appeared as a result of previous tests.

In the worst case, based on a 100 - kiloton blast at a depth of 700 metres close to the edge of the atoll, radioisotopes could reach the ocean in 25 to 50 years.

Fallout is a mélange of the vaporized environment — soil and structures that were near the blast — laced with fission products (radioisotopes created when fissile materials like uranium or plutonium fission), activation products (radioisotopes formed when the blast radiation transmutes shielding and other bomb components), and residual nuclear material.

In a collaborative study appearing in Nature, researchers from Japan describe how gamma rays from lightning react with the air to produce radioisotopes and even positrons — the antimatter equivalent of electrons.

The reactor itself became a globally dominant supplier of radioisotopes — in particular, molybdenum - 99 (Mo - 99), a workhorse of medical imaging employed for millions of scans every year.

In an attempt to do this, the researchers used a technique known as radioimmunotherapy in which radioisotopes (unstable elements that release radiation) mounted on antibodies (protein molecules akin to infection search - and - destroy missiles) are injected into the body.

Once inside, researchers found that the antibodies zeroed in on their targets — viral antigens — and the radioisotopes destroyed nearby cancer cells without damaging surrounding healthy tissue.

All commonly used medical radioisotopes can be produced without using nuclear reactors or enriching uranium, or can be replaced with other isotopes that can be produced without a fission reaction, or by alternative technologies.

PUBLICATIONS Nuclear Medicine without Nuclear Reactor or Uranium Enrichment (2013) 13 July 2013 All commonly used medical radioisotopes can be produced without using...

The researchers now plan to further develop the tracer molecules by labeling them with radioisotopes, used during positron emission tomography (PET).

► Iran's agreement on Tuesday to «dismantle large pieces of its nuclear program in exchange for lifting crippling economic sanctions... paves the way for a rapid expansion of scientific cooperation with Iran in areas as diverse as fusion, astrophysics, and cancer therapy using radioisotopes,» Richard Stone wrote that day at ScienceInsider.

After all, this is what makes radioisotopes so useful for biological research: They are detectable in even the most minuscule (and safe) amounts.

For the less volatile radioisotopes to travel, they must ride on particles that are heavier than air.

Other short - lived radioisotopes may also be present — possibly enough, a radiation expert who did not wish to be named told New Scientist, to warrant temporary relocation of local inhabitants.

Ted Wyka, chairman of a federal accident review board, said improperly placed or inoperative air monitors, a substandard ventilation system and mismanagement contributed to the February 14 leak of radioisotopes including plutonium.

That meant they could be dated by measuring radioisotopes using new techniques mastered by Brumm's colleague at Griffith, Maxime Aubert.

Radioisotopes are injected and the radiation emitted is used to create 2D images.

When radioisotopes lodge in certain organs — such as iodine - 131 in the thyroid gland — the constant bombardment of surrounding tissue can overwhelm repair mechanisms and trigger cancer.

The Tehran Research Reactor is used mainly for producing medical radioisotopes, not weapons, but Iran's dogged effort to produce fuel for it sparked the latest international crisis over the nation's nuclear ambitions — and helped motivate the July 2015 nuclear deal to constrain them.

CBI has since enhanced the compound with chelants, additives that bind to lead dust, radioisotopes, and other hazardous materials.

Furthermore, most of the radiation had accumulated on the leaves and could be washed off, suggesting that the plants were not absorbing dangerous levels of radioisotopes directly from the soil.

The scientists studied crops at a Tokyo research field, including cabbages and potatoes that were planted a few weeks after rains showered the field with radioisotopes from Fukushima.

Their first results, to appear in the Japanese journal Radioisotopes in August, paint a surprisingly optimistic picture.

Despite this good news, the team's data also show that the radioisotopes seem to be stuck firmly to the soil, mainly in the top five centimeters (see «Skin deep»), and are not being washed away by rain.