| carbon | <chemistry, element> Sixth element (Z=6) in the periodic table, has 6 protons, often described as the basis of life on earth because of its chemical properties, has potential for use with silicon as a low-activation structural material for fusion reactors, in the form silicon carbide. Carbon tiles are often used in plasma-facing components because its low Z makes carbon a relatively nice impurity. It is also useful as a neutron moderator. See: low-activation materials, plasma-facing components. Abbreviation: C (13 Nov 1997) |
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| carbon-11 | A cyclotron-produced, positron-emitting radioisotope of carbon with a half-life of 20.3 minutes; used in positron-emitting tomography. (05 Mar 2000) |
| carbon-12 | The standard of atomic mass, 98.90% of natural carbon. (05 Mar 2000) |
| carbon-13 | A stable natural isotope, 1.1% of natural carbon. (05 Mar 2000) |
| carbon-14 | A beta-emitter with a half-life of 5715 years, widely used as a tracer in studying various aspects of metabolism; naturally occurring 14C, arising from cosmic ray bombardment, is used to date relics containing natural carbonaceous materials. (05 Mar 2000) |
| carbon bisulfide | <chemical> Carbon disulfide (cs2). A colourless, flammable, poisonous liquid, cs2. It is used as a solvent, and is a counterirritant and has local anaesthetic properties but is not used as such. It is highly toxic with pronounced CNS, haematologic, and dermatologic effects. Chemical name: Carbon disulfide (12 Dec 1998) |
| carbon compounds, inorganic | Inorganic compounds that contain carbon as an integral part of the molecule but are not derived from hydrocarbons. (12 Dec 1998) |
| carbon dichloride | An anthelmintic against hookworm and other nematodes. Synonym: carbon dichloride, ethylene tetrachloride, tetrachloroethylene. (05 Mar 2000) |
| carbon disulfide | <chemical> Carbon disulfide (cs2). A colourless, flammable, poisonous liquid, cs2. It is used as a solvent, and is a counterirritant and has local anaesthetic properties but is not used as such. It is highly toxic with pronounced CNS, haematologic, and dermatologic effects. Chemical name: Carbon disulfide (12 Dec 1998) |
| carbon disulfide poisoning | Acute or chronic intoxication by CS2, an industrial condition encountered among rubber workers and makers of artificial silk (rayon) by the viscose process; characterised by insomnia, listlessness, and irritability, followed by paralyses, impaired vision, peptic ulcer, and psychoses. (05 Mar 2000) |
| carbon fixation | <plant biology> The process by which photosynthetic organisms such as plants turn inorganic carbon (usually carbon dioxide) into organic compounds (us. Carbohydrates). (09 Oct 1997) |
| carbon isotopes | Stable carbon atoms that have the same atomic number as the element carbon, but differ in atomic weight. C-13 is a stable carbon isotope. (12 Dec 1998) |
| carbon monoxide | <chemical> An organic byproduct of combustion, tasteless, odourless gas that competes with oxygen binding sites on the haemoglobin molecule. Early symptoms of carbon monoxide exposure include headache and nausea. Advanced exposure results in coma, cardiovascular collapse and death. (27 Sep 1997) |
| carbon monoxide dehydrogenase disulfide reductase | <enzyme> Catalyses a reversible exchange of coash with acetyl-CoA in combination with carbon monoxide dehydrogenase (EC 1.2.99.2) Registry number: EC 1.8.- Synonym: co dehydrogenase disulfide reductase, co-dd-reductase (26 Jun 1999) |
| carbon monoxide haemoglobin | <chemical> Chemical name: Haemoglobins, carbonyl- (12 Dec 1998) |
| carbon dioxide |
a greenhouse gas whose atmospheric concentrations have been increasing from pre-industrial (1750-1800) levels of 280 parts per million (ppm) to present day levels of 356-360 ppm, depending on location. CO2 decreases in summertime when plant productivity consumes CO2 and increases in winter when biota are less active and respiration exceeds photosynthesis. A main source of CO2 increase in the atmosphere has been the burning of fossil fuels.
출처: www.pbs.org/strangedays/glossary/C.html
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| carbon dioxide |
A gas created during metabolism, when the cells use oxygen to burn fat and release energy. The lungs release it when you breathe out.
출처: www.clevelandclinic.org/heartcenter/pub/glossary/c...
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| carbon dioxide |
A colorless, odorless, nonpoisonous gas (chemical symbol CO2) found in the air in small amounts. Humans exhale it, and trees and other plants absorb it and use it to make food. Cutting down trees or burning fossil fuels, such as oil and coal, increases carbon dioxide in the atmosphere. It is a greenhouse gas that contributes to global warming, which, in turn, affects human health. It also creates the bubbles that are found in soda and other carbonated drinks.
출처: www.ecohealth101.org/glossary.html
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| carbon dioxide |
Carbon dioxide is the main greenhouse gas created by combustion, the so-called greenhouse effect, emitted primarily from human activity such as burning of fossil fuels to generate electricity and vehicles. Scientists believe these greenhouse gases are causing the earth's climate to change.
출처: www.bbc.co.uk/info/environment/2002/glossary.shtml
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| carbon dioxide laser |
also known as a CO2 laser, these are commonly used to perform skin resurfacing
출처: www.hairfacts.com/terms/termsc.html
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