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Topic: Carbon

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Carbon is the sixth most common element in the universe.
In addition, carbon is a very special element because it plays a dominant role in the chemistry of life.
This is the carbon molecule that has been making headlines in Nanotechnology and now the drug industry also has interests in it.
www.nyu.edu /pages/mathmol/modules/carbon/carbon1.html   (188 words)

  Carbon - Wikipedia, the free encyclopedia
Carbon is a chemical element in the periodic table that has the symbol C and atomic number 6.
Carbon occurs in all organic life and is the basis of organic chemistry.
The most prominent oxide of carbon is carbon dioxide, CO This is a minor component of the Earth's atmosphere, produced and used by living things, and a common volatile elsewhere.
en.wikipedia.org /wiki/Carbon   (2320 words)

 Carbon - ninemsn Encarta
Three forms of elemental carbon that occur in nature—diamond, graphite, and amorphous carbon—are solids with extremely high melting points and are insoluble in all solvents at ordinary temperatures.
Carbon dioxide is an important constituent of the atmosphere and is the main source of carbon incorporated in living matter.
Carbon fl, also called gas fl, is produced by incomplete combustion of natural gas and is mainly used as a filler and reinforcing agent for rubber.
au.encarta.msn.com /encyclopedia_761577017/Carbon.html   (599 words)

 Carbon (API) - Wikipedia, the free encyclopedia
Carbon is Apple Computer's procedural API for the Macintosh operating system, which permits a good degree of forward and backward compatibility between source code written to run on the outdated Mac OS 9, and the newer Mac OS X.
Carbon is often seen as a transitional or legacy technology, but in fact it is unlikely that large legacy codebases (e.g., Adobe Photoshop, etc.) ever will be completely rewritten for Mac OS X, and so it will necessarily remain a core part of the OS X operating system indefinitely.
Carbon is often confused and/or compared with Cocoa, but the two are complementary and are solving different problems.
en.wikipedia.org /wiki/Carbon_(computing)   (1575 words)

 carbon. The Columbia Encyclopedia, Sixth Edition. 2001-05
Carbon is found free in nature in at least four distinct forms (see allotropy).
In a third form, the so-called amorphous carbon, the element occurs partly free and partly combined with other elements; charcoal, coal, coke, lampfl, peat, and lignite are some sources of amorphous carbon.
Carbon exists in the stars; a series of thermonuclear reactions called the carbon cycle (see nucleosynthesis) is a source of energy for some stars.
www.bartleby.com /65/ca/carbon.html   (760 words)

 Global Carbon Cycle - The Woods Hole Research Center
The second reason that carbon is of interest is because carbon, in the form of carbon dioxide (CO), is the major greenhouse gas released to the atmosphere as a result of human activities.
The difference between the total amount of carbon released to the atmosphere and the total amount withdrawn from the atmosphere determines whether the land is a net source or sink for atmospheric carbon.
When considered with the other terms in the global carbon equation (the atmosphere, fossil fuels, and the oceans), there is an apparent imbalance in the global accounting, and considerable effort has gone into explaining and finding this residual sink, or missing sink, of carbon.
www.whrc.org /carbon/index.htm   (731 words)

 Carbon (C) - Chemical properties, Health and Environmental effects
Carbon forms compounds with the halogens with CX as general formula, where X is fluorine, chlorine, bromine or iodine.
Carbon is present in the atmosphere as carbon dioxide in 0,03% in volume.
Carbon dioxide is used in drinks carbonatation, in fire extinguishers and, in solid state, as a cooler (dry ice).
www.lenntech.com /Periodic-chart-elements/C-en.htm   (983 words)

 Carbon   (Site not responding. Last check: )
Carbon is found free in nature in three allotropic forms: amorphous, graphite, and diamond.
The interplanar spacings of "white" carbon are identical to those of carbon form noted in the graphite gneiss from the Ries (meteoritic) Crater of Germany.
In combination, carbon is found as carbon dioxide in the atmosphere of the earth and dissolved in all natural waters.
www.scescape.net /~woods/elements/carbon.html   (532 words)

 The Environmental Literacy Council - Carbon Cycle
Carbon is a fundamental building block of life; life on Earth is comprised of carbon-based life forms.
Trees store large amounts of carbon; when they die and decompose, much of this stored carbon is released as CO However, when humans clear large expanses of forest, primarily through the use of fire, the levels of atmospheric carbon are increased in two ways.
Since carbon dioxide is a primary greenhouse gas, many scientists argue that the increase in atmospheric CO from human activities has resulted in an enhanced greenhouse effect and could result in corresponding changes in our global climate, including higher global temperatures.
www.enviroliteracy.org /article.php/478.html   (967 words)

 Carbon nanotubes (January 1998) - Physics World - PhysicsWeb
In 1996 a group led by Thomas Ebbeson at the NEC Research Institute in Princeton, New Jersey, estimated the Young's modulus of a carbon nanotube by measuring the vibrations of the free end of a nanotube that was clamped at the other end.
In the same way that carbon fibres are used in composites to strengthen a structure or to enhance the electrical conductivity of the main constituent, carbon nanotubes could be combined with a host polymer (or metal) to tailor their physical properties to specific applications.
Since carbon nanotubes are so small, they could be used in polymer composites that could be formed into specific shapes, or in a low-viscosity composite that could be sprayed onto a surface as a conducting paint or coating.
physicsweb.org /articles/world/11/1/9   (4124 words)

 Carbon Sequestration
Carbon sequestration refers to the provision of long-term storage of carbon in the terrestrial biosphere, underground, or the oceans so that the buildup of carbon dioxide (the principal greenhouse gas) concentration in the atmosphere will reduce or slow.
Carbon Sequestration in the Oceans: Enhancing the net oceanic uptake from the atmosphere by fertilization of phytoplankton with nutrients, and injecting CO to ocean depths greater than 1000 meters.
Sequencing Genomes of Micro-organism for Carbon Management: Sequencing the genomes of microbes that produce fuels such as methane and hydrogen or aid in carbon sequestration, to allow an evaluation of their potential use to produce, for example, methane or hydrogen from either fossil fuels or other carbonaceous sources, including biomass or even some waste products.
cdiac2.esd.ornl.gov   (409 words)

 Carbon Cycle   (Site not responding. Last check: )
Carbon dioxide is slightly soluble and is absorbed into bodies of water such as the ocean and lakes.
Some of the dissolved carbon dioxide remains in the water, the warmer the water the less carbon dioxide remains in the water.
The carbonate sediments are constantly being formed and redissolved in the depths of the oceans.
www.elmhurst.edu /~chm/vchembook/306carbon.html   (629 words)

 Carbon Atom
Carbon is the sixth most abundant element in the universe.
Carbon, discovered in prehistory and was known to the ancients, who manufactured it by burning organic material making charcoal.
Here we see carbon has six electrons represented by arrows (the direction of the arrow represents the electron spin) Two electrons are found in the 1s orbital close to the nucleus.
www.edinformatics.com /math_science/c_atom.htm   (539 words)

Carbon monoxide is created when carbon is burned in a deficiency of oxygen, as in charcoal fires, internal combustion engines, poorly drafted and vented heaters and furnaces, fuel gases, and in methane explosions in coal mines.
Petroleum is to carbon as silica is to silicon.
The composition of a carbon fuel is given by a proximate analysis in terms of fixed carbon, volatiles, ash and moisture, or by an ultimate analysis of the dry fuel in terms of percentages of C, H, S, O, N and ash.
www.du.edu /~jcalvert/phys/carbon.htm   (16712 words)

 Chemistry : Periodic Table : carbon : key information
Carbon is present as carbon dioxide in the atmosphere and dissolved in all natural waters.
Organic chemistry, a 1/112th subset of inorganic chemistry, is the study of carbon and its compounds.
Carbon is available in nature as graphite and (to a much lesser extent!) as diamond.
www.webelements.com /webelements/elements/text/C/key.html   (537 words)

 9(r) The Carbon Cycle
Carbon is released from ecosystems as carbon dioxide gas by the process of respiration.
Carbon is stored in the lithosphere in both inorganic and organic forms.
Some carbon dioxide is released from the interior of the lithosphere by volcanoes.
www.physicalgeography.net /fundamentals/9r.html   (809 words)

 Carbon   (Site not responding. Last check: )
Another form of elemental carbon, the fullerene, was not observed until 1985, although the possibility of its existence had been suggested as long ago as 1966.
The different kinds of carbon have very similar (but not quite identical) chemical and mechanical properties; the main practical significance of the existence of different isotopes stems from the fact that carbon-14 is radioactive, with a half-life of a few thousand years.
The carbon cycle is crucial to the way the Earth's ecosystem works: Plants absorb the carbon dioxide that makes up around 0.03% of our atmosphere and use the energy of sunlight to build sugar molecules from water and CO, a process known as photosynthesis.
fergusmurray.members.beeb.net /carbon.htm   (1376 words)

Carbon dioxide is formed in huge quantities by the combustion of fossil fuels.
Carbon monoxide is formed by the incomplete combustion of fossil fuels.
In the carbon monoxide molecule the atoms are joined by a triple bond and both atoms are sp hybridized.
www.uncp.edu /home/mcclurem/ptable/carbon.htm   (718 words)

 Carbon Bond: University of Utah News Release: June 27, 2001
Students in organic and biochemistry are taught that the longest common carbon bond is found in diamond, a form of pure carbon.
While potential applications of such basic research are difficult to predict, Miller said the new kind of carbon bond may be important in efforts to develop nanomaterials,” which are bigger than typical molecules but smaller than the smallest manufactured parts and are being studied for possible use in faster computers, display devices and micromachines.
The chemical structure of the compounds and the distances between their carbon atoms were known previously, “but they were not appreciated as a genuine carbon-carbon bond,”; he added.
www.utah.edu /unews/releases/01/jun/carbon.html   (803 words)

 The Carbon Cycle
Carbon is the basis of all organic molecules.
The carbon cycle is the process through which carbon is cycled through the air, ground, plants, animals, and fossil fuels.
Carbon is also stored in fossil fuels, such as coal, petroleum, and natural gas.
library.thinkquest.org /11353/carbon.htm   (428 words)

 Carbon   (Site not responding. Last check: )
Carbon is a soft, dull gray or fl non-metal that you can scratch with a fingernail.
The resulting gas is called water gas and is a mixture of hydrogen (50%), carbon monoxide (40%), carbon dioxide (5%), nitrogen and methane (5%).
Carbon in organic or hydrocarbon compounds is the foundation of modern society and biochemistry.
www.elmhurst.edu /~chm/vchembook/102carbon.html   (220 words)

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