1. Department
of Chemistry, State University of New York at Oswego, Oswego, New York 13126, United States
2. Institute
of Hygiene, University of Münster, Robert-Koch-Strasse 41, 48149 Münster, Germany
3. Dr. Franz Köhler Chemie GmbH, Werner-von-Siemens-Strasse 22-28, 64625 Bensheim, Germany