1. Department of Materials Science, The University of Shiga Prefecture, Hikone, Shiga 522-8533, Japan
2. Department of Life Style Studies, The University of Shiga Prefecture, Hikone, Shiga 522-8533, Japan
3. Ohmikenshi Rayon Co. Ltd., Kakogawa, Hyougo 675-0023, Japan
4. Department of Applied Materials Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan