Journal ArticleDOI
Isotopic standards for carbon and oxygen and correction factors for mass-spectrometric analysis of carbon dioxide
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TLDR
In this paper, Niee's and Solenhofen standards were compared to the Chicago PDB standard for carbon and oxygen isotope ratios, and the correction factors for instrumental effects and for the nature of the mass spectra were derived.About:
This article is published in Geochimica et Cosmochimica Acta.The article was published on 1957-01-01. It has received 4071 citations till now. The article focuses on the topics: Carbon & Carbon dioxide.read more
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Isotope separation factor of carbon dioxide-water system and isotopic composition of atmospheric oxygen
TL;DR: In this paper, the isotopic composition of CO2 equilibrated with water made of atmospheric oxygen was measured at 25.00, 19.81, and 14.55°C.
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Tree and grass rooting patterns in an African humid savanna
TL;DR: Structural results do not support the hypothesis of soil resource partitioning between trees and grasses and are thus consistent with functional results previously reported.
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Eastern Mediterranean hydroclimate over the late glacial and Holocene, reconstructed from the sediments of Nar lake, central Turkey, using stable isotopes and carbonate mineralogy
Jonathan R. Dean,Jonathan R. Dean,Matthew Jones,Melanie J. Leng,Melanie J. Leng,Stephen R. Noble,Sarah E. Metcalfe,Hilary J. Sloane,Diana Sahy,Warren J. Eastwood,C. Neil Roberts +10 more
TL;DR: In this article, high-resolution (∼25 years) oxygen (δ18O) and carbon isotope records, supported by carbonate mineralogy data, spanning the late glacial and Holocene were used to understand better the controls on Eastern Mediterranean climate.
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Insights into the origin of perylene from isotopic analyses of sediments from Saanich Inlet, British Columbia
TL;DR: Perylene is an abundant and common polycyclic aromatic hydrocarbon in sedimentary settings, yet its origin remains puzzling as discussed by the authors, and the relation of perylene to the amount and type of organic matter in the sediments of Saanich Inlet, a coastal marine anoxic basin.
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Medium- and long-chain triglycerides labeled with 13C: a comparison of oxidation after oral or parenteral administration in humans.
TL;DR: The results show that the oxidation of trioctanoate in healthy humans is greater both after oral and parenteral administration and increases more rapidly than that of [13C]trioleate.
References
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On the Isotopic Chemistry of Carbonates and a Paleotemperature Scale
TL;DR: In this paper, the temperature variation of the fractionation of oxygen in exchange reactions between dissolved carbonate and water and between calcite and water was calculated on theoretical grounds, and checked experimentally.
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Variation of O18 content of waters from natural sources
S Epstein,Toshiko K. Mayeda +1 more
TL;DR: A number of marine water and fresh water samples were examined for the relative O18O16 ratio, and the variation of this ratio was determined to a precision of ± 1% as mentioned in this paper.
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Revised carbonate-water isotopic temperature scale
TL;DR: The relationship between temperature and O(18) content relative to that for a Cretaceous belemnite of the Pee Dee formation previously reported (Epstein, Buchsbaum, Lowenstam, and Urey, 1951) has been re-determined using modified procedures for removing organic matter from shells, and is found to be 16.5 - 4.3 δ + 0.14 δ^2
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The geochemistry of the stable carbon isotopes
TL;DR: A survey of the variation of the ratio C13/C12 in nature can be found in this paper, where Urey and his co-workers used two complete feed systems with magnetic switching to determine small differences in isotope ratios between samples and a standard gas.