Affiliation: | a Department of Chemistry, Kanagawa Prefectural College of Nursing and Medical Technology, 1-5-1 Nakao, Asahi-ku, Yokohama 241-0815, Japan b Department of Bacteriology and Pathology of Kanagawa Prefecture, 1-5-2 Nakao, Asahi-ku, Yokohama 241-0815, Japan |