1. Department of Chemical Engineering, University of Mumbai Institute of Chemical Technology, Mumbai, India
2. Present address: The Howard P. Isermann Department of Chemical and Biological Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180, USA. Phone: +1–518–2764214, Fax: +1–518–2764030
3. Department of Pharmacy, University of Mumbai Institute of Chemical Technology, Mumbai, India