1. School of Mechanical Engineering
2. Korea University
3. Seoul 136-713
4. Korea
5. Photocatalysis Int. Research Center
6. Tokyo University of Science
7. Chiba 278-8510
8. Japan
9. Green School
10. Petrochem. Research Chair
11. Dept. of Chem.
12. King Saud Univ.
13. Riyadh 11451
14. Saudi Arabia