Dr. Owen Duckworth completed MS and PhD degrees (1997-2003). His MS thesis title was "Ligand-Promoted Dissolution of Hematite: Relationships between Surface Complexation Structures and Dissolution Rate Constants." His Ph.D. thesis title was "Macroscopic and Microscopic Perspectives on Dissolution of Carbonate Minerals." He continued as a postdoctoral associate at the University of California, Berkeley, working with Professor Garrison Sposito. He is now a professor at North Carolina State University, Raleigh. He can be reached at: owen_duckworth@ncsu.edu or (919) 513-1577. http://www.soil.ncsu.edu/personnel/duckworth_owen/index.html