carbon 13
noun Date: 1939 an isotope of carbon of mass number 13 that constitutes about 1/70 of natural carbon and is used as a tracer especially in spectroscopy utilizing nuclear magnetic resonance

New Collegiate Dictionary. 2001.

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  • Carbon-13 — Infobox isotope alternate names = symbol =C mass number =13 mass = num neutrons =7 num protons =6 abundance =1.109% halflife = error halflife = background =#F99 text color = decay product = decay symbol = decay mass = decay mode1 = decay energy1 …   Wikipedia

  • carbon 13 — noun : a heavy isotope of carbon having the mass number 13, constituting about 1/70 of natural carbon, and used in tracer studies in chemistry and biology symbol C13 or 13C * * * the stable isotope of carbon having an atomic mass number 13, used… …   Useful english dictionary

  • carbon-13 — noun the least abundant of the two stable isotopes of carbon, , having six protons and seven neutrons See Also: carbon 12, carbon 13 NMR, carbon 14 …   Wiktionary

  • carbon 13 — the stable isotope of carbon having an atomic mass number 13, used as a tracer. Also, carbon 13 /kahr beuhn therr teen /. [1940 45] * * * …   Universalium

  • carbon 13 — a naturally occurring isotope of carbon, atomic mass 13, occurring 1.11 percent of the time. It is used as a tracer in liver function tests and a few metabolic tests …   Medical dictionary

  • carbon-13 — A stable natural isotope, 1.1% of natural carbon …   Medical dictionary

  • Carbon-13 NMR — (13C NMR or sometimes simply referred to as carbon NMR) is the application of nuclear magnetic resonance (NMR) spectroscopy to carbon. It is analogous to proton NMR (1 H NMR) and allows the identification of carbon atoms in an organic molecule… …   Wikipedia

  • Carbon-13 NMR satellite — In an NMR spectrum the presence of 1% of the NMR active carbon 13 species will cause coupling. This will split 1% of the peak into a doublet. These are called satellites as they small and are around the main non coupled peak like little shoulder… …   Wikipedia

  • Carbon label — is a form of isotopic labeling where a carbon 12 atom has been replaced with either a carbon 13 atom or a carbon 14 atom in a chemical compound so as to tag (i.e. label) that position of the compound to assist in determining the way a chemical… …   Wikipedia

  • carbon cycle — 1. Ecol. the circulation of carbon atoms in the biosphere as a result of photosynthetic conversion of carbon dioxide into complex organic compounds by plants, which are consumed by other organisms: the carbon returns to the atmosphere in the form …   Universalium

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