Mathematics – Logic
Scientific paper
Oct 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981gecoa..45.1895n&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 45, Issue 10, pp.1895-1898
Mathematics
Logic
6
Scientific paper
The D / H and 13 C / 12 C ratios of the cellulose nitrate and saponifiable lipid fractions prepared from eleven annual growth rings of a California redwood were determined. The D / H ratios of the two fractions are related to one another for the annual rings in the sapwood portion of the tree, but not for those in the heartwood or in the wood undergoing the transition from sapwood to heartwood. No relationship was observed between the 13 C / 12 ratios of the two fractions. These results suggest that analysis of the hydrogen isotopic composition of the saponifiable lipid fractions in plants will provide information useful for climatic reconstruction provided the initial isotopic record has not been changed by subsequent physiological or diagenetic processes.
Deniro Michael J.
Epstein Samuel
Northfelt Donald W.
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