carbon

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carbon

 (C) [kahr´bon]
a chemical element, atomic number 6, atomic weight 12.011. (See Appendix 6.)
carbon 11 a radioactive isotope of carbon, atomic mass 11, having a half-life of 20.39 minutes; used as a tracer in positron emission tomography.
carbon 14 a radioactive isotope of carbon, atomic mass 14, having a half-life of 5730 years; used as a tracer in cancer and metabolic research.

car·bon (C),

(kar'bŏn),
A nonmetallic tetravalent element, atomic no. 6, atomic wt. 12.011; the major bioelement. It has two natural isotopes, 12C and 13C (the former, set at 12.00000, being the standard for all molecular weights), and two artificial, radioactive isotopes of interest, 11C and 14C. The element occurs in three pure forms (diamond, graphite, and in the fullerines), in amorphous form (in charcoal, coke, and soot), and in the atmosphere as CO2. Its compounds are found in all living tissues, and the study of its vast number of compounds constitutes most of organic chemistry.
[L. carbo, coal]

carbon

(kär′bən)
n.
1. Symbol C An abundant nonmetallic element that occurs in many inorganic and in all organic compounds, exists freely in amorphous, graphite, and diamond forms and as a constituent of coal, limestone, and petroleum, and is capable of chemical self-bonding to form an enormous number of chemically, biologically, and commercially important molecules. Other significant allotropes include fullerenes and nanotubes. Atomic number 6; atomic weight 12.011; sublimation point 3,825°C; triple point 4,489°C; specific gravity of amorphous carbon 1.8 to 2.1, of diamond 3.15 to 3.53, of graphite 1.9 to 2.3; valence 2, 3, 4. See Periodic Table.
2. A carbon-containing gas, notably carbon dioxide, or a collection of such gases, especially when considered as a contributor to the greenhouse effect: plans for capturing and sequestering carbon produced by power plants.
3.
a. A sheet of carbon paper.
b. A carbon copy.
4. Electricity
a. Either of two rods through which current flows to form an arc, as in lighting or welding.
b. A carbonaceous electrode in an electric cell.

car′bon·ous (-bə-nəs) adj.

carbon

Chemistry
A nonmetallic tetravalent element (atomic number, 6; atomic weight, 12.01), which is central to all forms of life, and a core constituent of organic molecules.
 
Materials science
Because of its chemical properties, carbon has potential for use with silicon as a low-activation structural material for fusion reactors, as silicon carbide.

car·bon

(C) (kahr'bŏn)
A nonmetallic tetravalent element, atomic no. 6, atomic wt. 12.011; the major bioelement. It has two natural isotopes, 12C and 13C (the former, set at 12.00000, being the standard for all molecular weights), and two artificial, radioactive isotopes of interest, 11C and 14C. The element occurs in diamond, graphite, charcoal, coke, and soot, and in the atmosphere as CO2. Its compounds are found in all living tissues, and the study of its vast number of compounds constitutes most of organic chemistry.
[L. carbo, coal]

carbon

The non-metallic element on which all organic chemistry is based and which is thus present in all organic matter. A carbon atom is capable of combining with up to four other atoms (tetravalent), including other carbon atoms; it is this property that allows so many compounds to be formed.

carbon

the element which is the basis of organic structure. Carbon has a valency of four, each atom forming four covalent bonds in its compounds. Long chains may be formed which give rise to the complexity of many organic compounds.

car·bon

(C) (kahr'bŏn)
Nonmetallic tetravalent element found in all living tissues; the study of its vast number of compounds constitutes most of organic chemistry.
[L. carbo, coal]

Patient discussion about carbon

Q. hi my name is ray i am from england and i am on oxygen i am a retainer of carbon monxide do you guys know whoa any place working with stem cell or natural medical emial rsantolla@aol.co.uk

A. i had a whole course on stem cell use in tissue engineering and from what i know this is an area that still in research and very little clinical use. the ability to create lungs from Mesenchimal Stem Cells is a far away dream right now. but here are some links to labs that research that area:
http://organizedwisdom.com/Stem_Cells_for_Emphysema

More discussions about carbon
References in periodicals archive ?
"For organizations that depend on quick-turn carbonless documents, our new printer presents dramatic improvements in quality and productivity," says Tim Spencer, general manager of Standard Register Document Systems.
Smith has been involved in several lawsuits concerning her health reactions to the product, and she has joined other members of the Carbonless Copy Paper Injury and Information Network in filing a suit against 22 paper manufacturers under California's Proposition 65.
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Common office tasks such as writing or carbonless copy pa per, photocopying and using a computer recently have come under scrutiny as work-site health risks by the U.S.
On 25 April, the EU Court of Justice gave its judgement in a series of appeal cases concerning the carbonless paper cartel (see Case T-109/02).
While Appleton retains its traditional carbonless paper business, it is aggressively developing new paper products and products outside the traditional paper industry.
Supply of carbonless paper in all formats for the sep-riep printing press at the melun detention center (77).
While Appleton retains its traditional carbonless paper business, it is developing new paper products and products outside the traditional paper industry.
Business forms, delivery slips and bank transfer forms are the most widespread application for carbonless paper, accounting for over 90% of total consumption.
Commercial installations of curtain coaters in the paper industry to date have been for specialty grades including carbonless and thermal imaging papers.
Contract Awarded for Order printing prices of twoink records 400 games carbonless sheets 1 400 games carbonless sheets 2 400 games carbonless pages 3 pages 1 pages 2 and pages 3 interleaved in block of 50 total 8 notebooks 400 games carbonless pages 4 in block of 50 total 8 notebooks 100 games carbonless pages 5 100 games carbonless pages 6 pages 5 and pages 6 interleaved in block of 50 total 2 notebooks payment siif 60 days samples are attached
Under the terms of the agreement, the new company will acquire MWV's Papers business, with mills having a combined annual capacity of approximately 2.05 million tons of coated paper, 290,000 tons of carbonless paper, and 110,000 tons of uncoated paper.