1. Department of Chemical and Biological Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208
2. Naval Air Warfare Center, Weapons Division, China Lake, California 93555
3. Department of Chemical Engineering, Kansas State University, 1005 Durland Hall, Manhattan, Kansas 66506
4. Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208