carbon-13


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carbon-13

[′kär·bən ′thər‚tēn]
(nuclear physics)
A heavy isotope of carbon having a mass number of 13.
References in periodicals archive ?
Carbon in sugars originating from flowers is much higher in the isotope carbon-12, whereas sugars originating from sugar cane or corn are much higher in isotope carbon-13 levels.
Characterization of the synthesized compounds was done by using various spectroscopic techniques namely FTIR, proton and carbon-13 NMR, Mass spectrometry and elemental analysis.
Burger also identified a shift from heavier carbon-13 to lighter carbon-12; the latter results from burning fossil fuels .
"The seagrass had been labeled with stable isotope carbon-13, so when the sharks consumed it, we could test for a signature of carbon-13 in the sharks' tissues and see if nutrients from the seagrass were actually taken up into the body."
Representing a novel advance in solid state physics, dissolution dynamic nuclear polarization (d-DNP) enables the acquisition of carbon-13 ([sup.13]C) magnetic resonance data with an appreciable gain in sensitivity over conventional methods [7].
SIMS analyzes the ratio of carbon-13 to carbon-12 isotopes, comparing samples from the alleged fossils with those from empty sections of rock.
The choice of isotopic labels for APIs varies, but typically includes carbon-14, tritium, deuterium, carbon-13 or nitrogen-15.
Elguerob, Carbon-13 NMR Studies of Nitrogen Compounds.
My Master's thesis (Potassium Triphenylmethide: A Strong Base for Organic Synthesis) and PhD dissertation (Conformational Studies of Diastereomeric Sets of tert-Butyl Octalones using Proton and Carbon-13 NMR Spectroscopy) provided me with opportunities to expand my knowledge of laboratory techniques (e.g.