1. Fiber and Polymer Science Program; North Carolina State University; Raleigh North Carolina 27695
2. Department of Chemistry; Southern Methodist University; Dallas Texas 75275
3. Department of Chemical and Biomolecular Engineering; North Carolina State University; Raleigh North Carolina 27695
4. Department of Chemistry; University of Florida; Gainesville Florida 32611-7200
5. Department of Biochemistry; North Carolina State University; Raleigh North Carolina 27695