Natural Abundance of the Stable Isotopes of Carbon in Biological Systems

Smith, Bruce N.

doi:10.2307/1296391

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Natural Abundance of the Stable Isotopes of Carbon in Biological Systems

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Abstract

Within an organism metabolic processes lead to differences in isotopic content of various chemical fractions. Plant tissues exhibit a wide variation in ¹³C/¹²C ratios which is due primarily to differences in the carbon-fixation process. Animal tissues reflect the carbon isotope ratios of ingested food.

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Natural Abundance of the Stable Isotopes of Carbon in Biological Systems

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