1. Department of Chemistry, V.R. Siddhartha Engineering College, Vijayawada, India
2. Department of Physics, P.B. Siddhartha College of Arts & Science, Vijayawada, India
3. Department of Physics, V.R. Siddhartha Engineering College, Vijayawada, India
4. Department of Chemistry, University College of Engineering, JNTUK, Kakinada, India