carbon isotope ratio


Also found in: Acronyms.

carbon isotope ratio

[¦kar·bən ′is·ə‚tōp ‚rā·shō]
(geology)
Ratio of carbon-12 to either of the less common isotopes, carbon-13 or carbon-14, or the reciprocal of one of these ratios; if not specified, the ratio refers to carbon-12/carbon-13. Also known as carbon ratio.
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References in periodicals archive ?
We then sent the leaf samples to University of California, Irvine, for analysis of carbon isotope ratios via mass spectrometry (Dawson et al.
A Mann-Whitney U test performed only for data of these two prey species revealed a highly significant difference in their stable carbon isotope ratios (U = 0.
where "sample" refers to bromass from the experiment, "control" refers to values calculated from the bulk carbon isotope ratio (see below), and "standard" refers to acetanilide with a known isotope ratio.
The data of gravimetry as well as carbon isotope ratios were analyzed for their statistical significance among the genotypes following a completely randomized design by MSTATC software (Anonymous, 1989).
Pierce S, Winter K, Griffiths H (2002) Carbon isotope ratio and the extent of daily CAM use by Bromeliaceae.
Ehleringer JR, Buchmann N, Flanagan LB (2000) Carbon isotope ratios in belowground carbon cycle processes.
Carbon isotope ratios and physiological processes in arid land plants, p.
And even though the scientists measured the carbon isotope ratio in filter feeders such as mollusks and sea anemones during midsummer phytoplankton blooms, they found these animals derived an average of nearly 60 percent of their carbon from kelp, the group reports in the July 14 SCIENCE.
The carbon isotope ratio is difficult to measure in comets, notes astrophysicist Paul Feldman of Johns Hopkins University in Baltimore.
National contract notice: Gas analyzer for the measurement of stable carbon isotope ratios of methane and carbon dioxide