Author's Organization：
Department of Microbiology, Nihon University School of Dentistry at Matsudo
Department of Bioresources Chemistry, Faculty of Horticulture, Chiba University
Department of Bioresources Chemistry, Faculty of Horticulture, Chiba University
Research Laboratory of Nihon Sizen Kagaku Co., Ltd.
Department of Microbiology, Nihon University School of Dentistry at Matsudo
Department of Microbiology, Nihon University School of Dentistry at Matsudo
Department of Bioresources Chemistry, Faculty of Horticulture, Chiba University
Department of Bioresources Chemistry, Faculty of Horticulture, Chiba University
Department of Microbiology, Nihon University School of Dentistry at Matsudo