Sentences with phrase «carbonaceous materials»
"Carbonaceous materials" refers to substances that primarily contain carbon atoms. These materials can be derived from fossil fuels, such as coal and oil, and are commonly used as sources of energy or for industrial purposes. Full definition
Radiocarbon dating is a radiometric dating method that uses the naturally occurring isotope carbon - 14 to determine the age of carbonaceous materials up to ca 60,000 years.
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«Further study is required to fully understand the formation of carbonaceous material in these ancient sedimentary rocks,» Papineau said.
Radiocarbon dating is a radiometric dating method that uses (14 C) to determine the age of carbonaceous materials up to about 60,000 years old.
«But, of course, we know there can be carbonaceous materials made in other processes — like in hydrothermal vents — consistent with looking like microfossils that also have some carbon signal.
Recent breakthroughs in the York Green Chemistry Centre of Excellence include the isolation of valuable chemicals from wheatstraw, the design of new catalysts for organic chemistry in water (including the conversion of fermentation broths), and the conversion of starch and cellulose into higher value polymeric materials including a new family of carbonaceous materials with enormous applications potential
Similarly, if you look at carbonaceous material there's a tangled mess of sheets of carbon and you've got the vanadium mixed in.»
Some scientists say meteor showers could be responsible, by depositing carbonaceous material in the atmosphere that reacts to form methane.
In 2012 the Mars Science Laboratory Mission detected chlorinated organic matter, but they thought that the analysis process, which involved heating chlorine containing minerals and carbonaceous material together, was producing chlorine - containing organic compounds.
Under those conditions, reactions between the water and the rock would have liberated hydrogen gas, which in turn would have reacted with carbon dioxide, carbon monoxide, carbon grains or other carbonaceous material — producing methane.
Two samples that contained abundant apatite and carbonaceous material associations were analyzed in detail.
Carbon isotopes in carbonaceous material studied by the team were similar in composition to those found in comparable samples from Greenland.
[V L Budarin, J H Clark, R Luque, D J Macquarrie, «Versatile mesoporous carbonaceous materials for acid catalysis».
Professor Willard Libby produced the first radiocarbon dates in 1949 and was Radiocarbon dating is a radiometric dating method that uses (14 C) to determine the age of carbonaceous materials up to about 60,000 years old.
«But, of course, we know there can be carbonaceous materials made in other processes — like hydrothermal vents — consistent with looking like microfossils that also have some carbon signal.
However, inefficient combustion of wood, coal and diesel tends to produce dark carbonaceous material (black carbon, or soot) that also absorbs radiation and warms the atmosphere.
It can be produced by partial combustion of carbonaceous material in an environment having insufficient oxygen for full combustion.
Dating is a stage of romantic relationships in humans whereby two people meet socially with the aim of each assessing the other's suitability as a Radiocarbon dating is a radiometric dating method that uses (14 C) to determine the age of carbonaceous materials up to about 60,000 years old.
The gasification process takes organic, carbonaceous materials and transforms them into efficient synthetic gas through a series of chemical reactions held at high temperatures.
It is highlighted the thermal treatment through pyrolysis for large scale production of biochar or biocarbon that can be defined as a carbonaceous material obtained through thermal treatment of biomass at low temperatures and under inert atmosphere.
The chlorophyll molecule gets entangled within the carbonaceous material, thus preserving the vanadium.
«We plan to undertake further Raman spectroscopic work on the carbonaceous materials using nanospectroscopic imaging,» Lay said.
Deimos is composed of rock rich in carbonaceous material, much like C - type asteroids and carbonaceous chondrite meteorites.
The carbonaceous material was in a form similar to graphite, known for its use in pencils.
A good fit to the data is found by two distinct dust populations: (1) very small, hence unbound, hot dust grains confined in a narrow region at the sublimation rim of carbonaceous material; (2) bound grains at 2 AU that are protected from sublimation and have a higher mass despite their fainter flux level.
«We plan to undertake further Raman spectroscopic work on the carbonaceous materials using nanospectroscopic imaging,» he said.
Radiocarbon dating is a radiometric dating method that uses the naturally occurring isotope carbon - 14 to determine the age of carbonaceous materials up to ca 60,000 years.
Apart from the slowness of this reversal of the man - made greenhouse effect, one other problem would be that plant nutrients would also be lost to the biosphere with the carbonaceous material.
Coal: A readily combustible black or brownish - black rock whose composition, including inherent moisture, consists of more than 50 percent by weight and more than 70 percent by volume of carbonaceous material.