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 isotopes of carbon

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Mon. December 01, 2008

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Irradiated isotopes have never been so on trend. It's not an environmental thing, even though nuclear power, with its total absence of carbon emissions, ...
The longer the decay lifetime, the less the radiation emitted per gram of radio-isotope. Most elements that make up our bodies (hydrogen, oxygen, nitrogen, ...
The approach measures the amount of the radioactive isotope of carbon, carbon-14, which is created by cosmic rays high in the atmosphere, and by nuclear ...
Shchepinov thinks he has found an alternate way to counteract the malign effect by providing molecules with heavy isotopes (deuterium, carbon-13) which slow ...

The approach measures the amount of the radioactive isotope of carbon, carbon-14, which is created by cosmic rays high in the atmosphere. ...
Nelson examines carbon and oxygen isotopes in the teeth. These isotopes vary in plants according to how much water and light stress they are under, ...
The approach measures the amount of the radioactive isotope of carbon, carbon-14, which is created by cosmic rays high in the atmosphere. ...
carbon-13, a bond-strengthening, heavy form of carbon could also be used. Dr Shchehpinov said recently: 'We don't have to be consuming isotopes as white ...
... use one of the products of the fission of uranium-235, an energetic or fast neutron, to transmute other elements into isotopes that can undergo fission. ...
Other isotopes besides carbon-14 can also be used for radioactive dating including those of potassium, rubidium, magnesium and thorium. ...
(That stable isotope work was done by geologist Ashley Ballantyne at the University of Colorado.) But current climate models don't project such high ...
Then we can carbochlorinate the stuff by mixing it with carbon dust, exposing it to a stream of chlorine gas (both C and Cl will be carefully recycled and ...
Dr. Wallace Broecker - isotope geochemist, oceanographer, paleoclimatologist, a "towering scientist," according to Richard Alley, who is himself one - has ...
The researchers used a technique that identifies carbon and nitrogen isotopes in meat. The researchers, A. Hope Jahren and Rebecca Kraft, used the technique ...
carbon atoms come in a few different varieties or isotopes. Practically all of the carbon in the biosphere is in the form of the non-radioactive isotope ...
Both gases were abundant at the time and the recycling of the carbon within the environment could explain the wider range of carbon-isotope readings of the ...
Using a carbon isotope to identify the type of feed eaten by the animals whose meat goes into hamburgers, and the oil used to cook fries, researchers were ...
It adds that job losses would be minimal; the new carbon market would create new jobs; that the manufacturing sector will lose a few jobs; that household ...
This hydrogen research involves atoms, molecules, isotopes and formulas for various types of requirements and applications. When highly combustible energy ...
Its spent fuel - fuel that has been irradiated until it is no longer useful in sustaining a nuclear reaction - contains radio-isotopes that will remain ...
Using a technique that identifies carbon and nitrogen isotopes in meat, co-authors A. Hope Jahren and Rebecca Kraft tried to determine the animals' diets ...
The urea compound is an endogenous substance that contains one carbon atom, normally C, which can be replaced by its isotope C or C. Heliprobe uses the ...
"Using a technique that identifies carbon and nitrogen isotopes in meat, co-authors A. Hope Jahren and Rebecca Kraft tried to determine the animals' diets ...
The beef in the burgers and all of the chicken tested contained levels of a carbon isotope that proves that animal was fed corn before it became an item on ...
The results can be summed up in one word -- corn: We used carbon and nitrogen stable isotopes to infer the source of feed to meat animals, the source of fat ...
Nearly all the beef in the burgers and all of the chicken tested contained levels of a carbon isotope that proves the animal the meat came from was fed corn ...
Samples of the meat, chicken and fries were freeze-dried and then blended up in a lab so that their carbon isotope signatures could be analyzed. ...
The foods were then tested for stable isotopes of carbon and nitrogen that allow researchers to trace the type of fat used or the source of nutrition for ...
They have also refined methods for dating ancient rocks using radioactive isotopes. This method can show as well how much oxygen was in the atmosphere when ...
Cary also points out that this work could lead to producing isotopes for other kinds of therapy, as well as provide the groundwork for particle beams for ...
The authors also consider the use of isotopes from nuclear testing as a signature, but decide they appear a bit late in the game, after the Anthropocene is ...
However, using conventional carbon isotope dating, Kelemen and Matter showed that the underground veins are also quite young- 26000 years on average-and are ...
The level of carbon and oxygen isotopes in the otoliths can indicate where the fish were spawned, and where they end up. There are two main groups of ...
The tests reported in 1999, and others conducted since then, compared the ratios of carbon isotopes in the biomarkers, which could be extracted from the ...
Gen IV fast reactors (see wikipedia) utilize virtually every joule of energy out of the uranium leaving a virtually harmless isotope with a half-life on the ...
Presently the Kingdom and other GCC countries are importing most of these isotopes that are costly and time consuming to acquire. Moreover, when you import ...
This hydrogen research involves atoms, molecules, isotopes and formulas for various types of requirements and applications. When highly combustible energy ...
The 1999 paper reported that the hydrocarbons extracted from the Pilbara rocks 700 metres below the surface contained a ratio of carbon isotopes with ...
Another research experiment done by Spalding and colleagues, labeled differentiated (not going to divide) fat cells with a carbon isotope (a certain form of ...
It is unclear from the report what isotopes were released, and at what levels. And, it is unclear if measured health outcomes were limited to the typical ...

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