1. School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
2. Sumitomo Electric Industries Ltd, 1 Taya, Sakae, Yokohama, Kanagawa 244-8588, Japan
3. Department of Chemical Engineering, Imperial College of London, London SW7 2AZ, UK