1. Department of Chemistry B. S. Abdur Rahman Crescent Institute of Science and Technology Vandalur Chennai 600048 India
2. Department of Metallurgical & Materials Engineering Indian Institute of Technology, Madras Chennai 600036 India
3. Animal & Mineral Origin Drug Research Laboratory (AMDRL) Siddha Central Research Institute Central Council for Research in Siddha, Arignar Anna Hospital Campus, Arumbakkam Chennai 600 106 India