University of Wyoming geology Professor and National Geographic Explorer Ken Sims has published a new book on the application of isotopes to understanding earth system processes. “Isotopic Constraints ...

Identifying the sources of aerosol ammonium is essential because ammonium can impact the Earth's radiative balance, as well as human health and biological diversity. The sources of ambient ammonia ...

Keepers of precise periodic tables, it’s time to make some changes. The International Union of Pure and Applied Chemistry Commission on Isotopic Abundances and Atomic Weights (IUPAC CIAAW) has issued ...

THE most reliable values for the isotopic abundance of boron-10 in naturally occurring minerals have been derived from mass spectrometer measurements. Results quoted by different workers, however, ...

Isotopic fractionation associated with N2 fixation and NO3 - uptake by plants are relevant to the accuracy of estimates of N2 fixation based on differences in the natural abundance of 15N between N2 ...