1. Centre for Environmental Science, IIDS, University of Allahabad, Allahabad, India
2. Saha’s Spectroscopy Laboratory, Department of Physics, University of Allahabad, Allahabad, India
3. Department of Applied Science and Humanities, Faculty of Engineering and Technology, Khwaja Moinuddin Chishti Language University, Lucknow, India
4. Centre for Material Sciences, IIDS, University of Allahabad, Allahabad, India
5. National Academy of Sciences, Allahabad, India
6. School of Humanities and Sciences, Malla Reddy University, Hyderabad, India