1. Center for
Urban Energy Systems, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul 136-791,
Korea
2. Department of Chemical
and Biomolecular Engineering, Sogang University, 35 Baekbeom-ro, Mapo-gu, Seoul 121-742, Korea
3. Department of Cosmetic Science, Chungwoon University, Daehakgil-25, Hongseong-eup,
Hongseong-gun, Chungnam 350-701, Korea