The International Journal of Natural Sciences (iJNS) is an independent, quarterly basis online (ISSN: 2221-1020) & print (ISSN: 2221-1012) version, open access, peer reviewed, non-profit journal that publishes original research, short communications, review articles or essays, and book reviews relevant to Natural Sciences. Manuscripts submitted to the Editor-in-Chief or Executive Secretary are first reviewed by journal’s editorial board, and then going with peer review processes. All articles will be subjected to thorough, critical, objective and fair review by the Editors. Authors must adhere to the format described in ‘Authors Instruction’ section, lest the manuscript has to be rejected. The Editorial board reserves the right to reject any manuscript. iJNS is published by the Department of Medicine. Faculty of Veterinary & Animal Science, Sylhet Agricultural University , Bangladesh.