1. Department of Polymer Science and Technology; University of Calcutta, 92, A.P.C. Road; Kolkata 700009 India
2. Department of Physiology; University of Calcutta, 92, A.P.C. Road; Kolkata 700009 India
3. Department of Chemical Engineering; Indian Institute of Technology Roorkee; Roorkee Uttarakhand 247667 India