Smrity Sonbhadra, Lalit M. Pandey*Bio-interface & Environmental Engineering LabDepartment of Biosciences and Bioengineering,Indian Institute of Technology Guwahati, Assam, 781039, India*Corresponding author: Tel. +91-361-258-3201; Fax +91-361-258-2249Email addresses: s.smrity@iitg.ac.in, lalitpandey@iitg.ac.in