Number 19

Authors: John Petearson Anzola , andr´es Camilo Jim´enez , Juan Camilo Cuellar

Authors: Noha Kareem , Abeer Hamdy , Khaled Nagaty

Authors: Kuzhaloli.s , Shaji.k.s

Authors: S.k. Saritha , R K Pateriya

Authors: N. F. Elabady , M. I. Moussa , H. M. Abdalkader , S. F. Sabbeh

Authors: Meenakshiammal.r , Deivanayaki.n , N.shalini

Authors: M. H. Marghny , Rasha M. Abd El-aziz , Ahmed I. Taloba

Authors: M. Ellcy Priana