Presently much of my time goes towards developing isotopes as tracers of groundwaters and hydrocarbons. This research is motivated by applications to resource exploration, carbon cycle characterization, and environmental remediation.
Nonequilibrium clumped isotope signals in microbial methane.
2015 // Science, in press.
Measurement of a doubly-substituted methane isotopologue, 13CH3D, by tunable infrared laser direct absorption spectroscopy.
2014 // Analytical Chemistry, 86, 6487–6494.
Fractionation of sulfur isotopes by Desulfovibrio vulgaris mutants lacking hydrogenases or type I tetraheme cytochrome c3.
2013 // Frontiers in Microbiology, 4, 171.
Some talks & posters given at national or regional conferences.
Clumped isotopic (13CH3D) composition of methane from the Potato Hills gas field, Oklahoma.
2014 // Goldschmidt Conference, Sacramento, CA.
Sulfur isotope fractionation during reduction of sulfate by Desulfovibrio fructosovorans.
2014 // Northeastern Geobiology Symposium, Yale University.
Stable isotope fractionation during chromium(III) oxidation by δ-MnO2.
2010 // AGU Fall Meeting, San Francisco, CA.