Sentences with phrase «terrestrial sources»
The phrase "terrestrial sources" refers to things or materials that come from or are found on Earth's surface, such as plants, rocks, soil, or water. It means something that originates from the Earth rather than outer space or other planets. Full definition
It turns out that it would be very difficult to increase protein production from terrestrial sources.
rabett.blogspot.ru
Can we adapt and shift our protein consumption to more terrestrial sources, or must we continue to depend on the oceans for protein?
And the mantle is its only terrestrial source.
Based on the data, the scientists conclude that «worldwide rice production is responsible for [about] 1 percent of atmospheric methyl bromide and 4 percent of atmospheric methyl iodide» and that «methyl iodide emissions from rice paddies provide a sizable terrestrial source to the global budget.»
«This work highlights the fact that even with thoughtful and careful contamination control efforts, trace organics in extraterrestrial samples can be overwhelmed by terrestrial sources,» said Elsila.
Because fats and oils contribute ≈ 87 % of the ALA in the US diet (7), it is apparent that the contribution of other terrestrial sources is minor.
Soils are the largest single terrestrial source of carbon dioxide (CO2), but these emissions are highly sensitive to a range of factors associated with climate change and human land use (1).
Semiletov's work during the 1990s showed, among other things, that the amount of methane being emitted from terrestrial sources decreased at higher latitudes.
Oceanic methane releases could account for the magnitude of C - 12, while terrestrial sources seem unlikely: «To cause this type of global isotopic shift, you'd have to take all terrestrial plants and burn them into carbon dioxide,» Kessler says in the June 11 edition of Science.
First, since traces of life are everywhere on Earth, the amino acids could be simply contamination from terrestrial sources, either from material brought to the moon by the missions, or from contamination introduced while the samples were being handled back on Earth.
«The general idea is that the closer to the terrestrial source, the more color the carbon will have,» Cory says.
Only 10,000 marine compounds have been isolated so far, he points out, compared with 150,000 from terrestrial sources, so that you're much more likely to come up with a brand new molecule if you look in the oceans.
Instead, they said, terrestrial sources or quirks in the apparatus might be mimicking a real signal.
The isotopic composition of the amino acids (glycine, β - alanine, and L - alanine) had less Carbon - 13 and more closely resembled that from terrestrial sources than that from meteorites.
Uranium from terrestrial sources can last for approximately 100 years, according to Erich Schneider of the University of Texas - Austin.
But whether policies to stabilize greenhouse gases in the atmosphere should include this terrestrial source of CO2 is under debate.
Immediate challenges that confront models of the terrestrial - atmosphere system include exchanges of carbon and water between the atmosphere and land, and the terrestrial sources and sinks of trace gases.
«volcanoes popping off» might produce only a GT pa or so, but other «things like that coming out of the ocean» amount to around 332 GT pa, not to mention the 439 GT pa coming from terrestrial sources.