Obet, Obet, Program Studi Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Sam Ratulangi Manado
Obunadike, Chizoba Victory, Department of Pure and Applied Chemistry, Osun State University, Osogbo, Osun State
Obunadike, Chizoba Victory, Department of Pure and Applied Chemistry, Osun State University, Osogbo, Osun State (Nigeria)
Ogunsanmi, Ayomide Oluwaseyi, Department of Biochemistry, Kwara state University, Malete, Kwara State (Nigeria)
Ohi, Sriyana, SMK Negeri 1 Gorontalo (Indonesia)
Olabode, Ponmile Akeem, Department of Science Laboratory Technology, Ladoke Akintola University of Technology, Ogbomosho (Nigeria)
Oputu, Intan J., Jurusan Kimia, FMIPA Universitas Negeri Gorontalo
Otoluwa, Sri Yulanda, Jurusan Kimia, Universitas Negeri Gorontalo, Gorontalo (Indonesia)