1. a Lignocel Research, 73-8 Yatsumata, Fukui 910-3558, Japan
2. b Department of Biochemical Engineering, Graduate School of Science and Engineering, Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan
3. c Graduate School of Engineering, Fukui University of Technology, 3-6-1 Gakuen, Fukui 910-8505, Japan