Abstract
1Department of Biology, College of Liberal Arts, Toyama University, 3190 Gofuku, Toyama 930, Japan
2Institut für Allgemeine Mikrobiologie, Christian-Albrechts-Universität, D-23 Kiel, Federal Republic of Germany
3Lehrstuhl für Mikrobiologie. Technische Universität München, D-8000 Munich 2, Federal Republic of Germany
4Takasaki Radiation Chemistry Research Establishment, Japan Atomic Energy Research Institute, Takasaki, Gunma 370-12, Japan
5Institute of Applied Microbiology, University of Tokyo, Bunkyo-ku, Tokyo 113, Japan