1. Laboratory of Biotechnology, Hokkaido University of Education, Hakodate, Hokkaido 040-8567, Japan
2. Department of Electrical and Electronic Engineering, Hakodate National College of Technology, Hakodate, Hokkaido 042-8501, Japan
3. Department of Material and Environmental Engineering, Hakodate National College of Technology, Hakodate, Hokkaido 042-8501, Japan