13C


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13C

Symbol for carbon 13.

carbon-13 (13C)

a naturally occurring isotope of carbon, with an atomic mass of 13, occurring 1.11% of the time. It is used as a tracer in liver function tests and a few metabolic tests.
References in periodicals archive ?
UCL would like to invite suppliers to submit bids for supply of Bespoke MRI Coils for 13C Imaging on a Siemens 3T mMR MR-PET Scanner.
Today and tomorrow should be reasonably sunny with temperatures of between 11 and 13C.
ChemNMR can be used to accurately estimate 13C and 1H (proton) chemical shifts.
It is cooled to 13C and the pupils took part in activities to monitor the effects on their body and concentration.
Researchers from Georgetown University in Washington DC found that a cruciform vegetable compound called 13C, or indole-3-carbinol, increases levels of vital DNA repair proteins in cancer cells.
The inspectors found many pints served well above exceed the optimum drinking or "cellar" temperature of between 11C to 13C (around 55 F).
According to the 13C, drug development in today's post-genomic era requires a tremendous technology investment in hardware and software in order to make use of the incredible masses of genomic data, and it must integrate the tremendous body of work that already exists in databases throughout the world.
The technique of 13C NMR with Cross-Polarization and Magic-Angle Spinning (CPMAS NMR) is ideal for solids, and solution 13C NMR is used for extracts such as tannins from plant material and humic fractions from mineral soil.
The ratio of 13C to 12C, 15N/14N, 87Sr/86Sr and many other isotopes varies in a patterned fashion in the geosphere and biosphere.
They have about 65 percent of the heavier nonradioactive isotope - 13C.
OUTLOOK: CLOUDY HIGH WATER: WARMEST COLDEST Claremorris 13C (55F) Giant's Causeway 8C (46F) 30-SECOND BRAIN TEASER Boost your brain power with our 30-second test.
The break in sub-zero temperatures will be a welcome respite, with the mercury even reaching as high as 13C (55.