Science and Environmental Journals for Postgraduate (SENJOp) is an international journal published twice a year in June and December by Pascasarjana, Universitas Negeri Padang. The Science and Environmental Journals for Postgraduate (SENJOp) welcomes authoritative, original, ably illustrated, and well-written manuscripts on any topic of science and environmental issues in the world. The Journal publishes Articles, Technical Notes, Rapid Communications, Opinion Papers, Comments/Responses and Corrections