Dr. Abd-El-Hamid Bensafi, Associate Professor, Department of Chemistry and Physics, Faculty of Sciences, Abou Bekr Belkaid University of Tlemcen, Algeria
E-mail: aeh.bensafi@gmail.com

Dr. Prakash Prajapat, Department of Chemistry, UCOS, MLSU, Udaipur-313001, Rajasthan, India
Email: prajapatprakash11@yahoo.in