1. Development Division, Research and Development Group, Nippon Electric Glass Co., Ltd., 7-1, Seiran 2-chome, Otsu, Shiga 520-8639, Japan
2. Evaluation Division, Research and Development Group, Nippon Electric Glass Co., Ltd., 7-1, Seiran 2-chome, Otsu, Shiga 520-8639, Japan
3. Department of Applied Chemistry and Environment, Faculty of Engineering, Tohoku Institute of Technology, 35-1, Yagiyama, Kasumicho, Taihakuku, Sendai 982-8577, Japan