Carbon Isotope Effects in Biological Systems

The thermodynamic properties of isotopic substances

Harold C. Urey · Journal of the Chemical Society (Resumed) · 1947 · 2.5K citations

Natural Sciences, Chemistry, Physics +8

Improvements in Mass Spectrometers for the Measurement of Small Differences in Isotope Abundance Ratios

C. R. McKinney, J. M. McCrea, Samuel Epstein et al. · Review of Scientific Instruments · 1950 · 724 citations

Pharmacy, Chemistry, Analytical Chemistry +16

Age Determination by Radiocarbon Content: World-Wide Assay of Natural Radiocarbon

W. F. Libby, E. C. Anderson, J. R. Arnold · Science · 1949 · 382 citations

Natural Sciences, Earth Sciences, Geology +12

The Relative Reaction Velocities of Isotopic Molecules

Jacob Bigeleisen · The Journal of Chemical Physics · 1949 · 381 citations

Natural Sciences, Chemistry, Physics +16

Variations in the Relative Abundance of the Carbon Isotopes

A. O. Nier, Earl A. Gulbransen · Journal of the American Chemical Society · 1939 · 293 citations

Natural Sciences, Chemistry, Geochemistry +11