1. Department of Chemistry, Oregon State University, 153 Gilbert Hall, Corvallis, OR 97331–4003, USA.
2. Hewlett-Packard Company, 1000 NE Circle Boulevard, Corvallis, OR 97330, USA.
3. Department of Computer and Electrical Engineering, Oregon State University, Corvallis, OR 97331–3211, USA.
4. ReyTech Corporation, 742 SE Glenwood Drive, Bend, OR 97702, USA.