B. Ranjithkumar - Department of Physics, Government Arts College, Udumalpet, 642 126, Tamilnadu, India
E. Ranjith Kumar
H.B. Ramalingam - Department of Physics, Government Arts College, Udumalpet 642 126, Tamilnadu, India
C. Sharmila Rahale - Tamil Nadu Agricultural University
Mohamed H.H. Mahmoud
Adel M. Binyaseen - Umm al-Qura University
Ali A. Keshk - University of Tabuk
Nashwa M. El-Metwaly - Umm al-Qura University