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 ?
Maximum temperatures will surge to 37C inland, with lows of 13C expected in the mountains.
In contrast, in normal circumstances, a strong and early release of 13CO2 in the breath following an oral dose of 13C sucrose indicates a healthy gut function.
It will feel warm, perhaps up to 13C but will change later in the day.
He said: "Temperatures will reach 10C to 13C in the afternoon and the weekend will start fine and sunny on Saturday.
13C NMR spectra indicated pe presence of four mepylenes two carbonyl carbons seven quaternary carbons seventeen mepines and four mepyls.
1)from Palaeocene-Eocene boundary (Nammal Formation lower contact with Patala Formation) to upper contact of the Nammal Formation with the Sakesar Limestone in the Salt Range for analysis of their 18O and 13C abundance.
The results of 13C (1H) CP-MAS NMR on collagen are presented first followed by the 13C (1H) CP-MAS NMR performed on mandibular ulnar and calvaria bones.
Therefore, (delta) 13C changes were not associated to either SLA or Pc/Pa, (delta) 13C furnished an estimation of long-term Pc/Pa and, in turn, of long-term water use efficiency.
Britain put overseas cities in the shade, beating 13C daytime peaks in Paris, Cyprus and Palermo, Italy, as well as 7C in Madrid and 2C in Moscow.
It will stay generally cloudy, with some drizzle, in England and Wales on December 25 with temperatures reaching 13C.
Todays minimum temperatures were Islamabad 9C, Lahore 13C, Quetta 5C, Karachi 19C, Peshawar 12C, Muzaffarabad 9C, Gilgit 5C, Murree 8C, Multan 15C and Faisalabad 13C.
The break in sub-zero temperatures will be a welcome respite, with the mercury even reaching as high as 13C (55.