Inayah, Niswatul, Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Negeri Padang (Indonesia)
Irawati, Utami, Chemistry Department, Faculty of Mathematics and Natural Sciences, Lambung Mangkurat University, Jl. A. Yani Km. 36 Banjarbaru 70714 Kalimantan Selatan (Indonesia)
Irma, Reza, Department of Pharmacy, Universitas Muslim Nusantara Al Washliyah (Indonesia)
Irmadona, Irmadona, Jurusan Pendidikan Teknik Bangunan, Universitas Negeri Medan, Jl. Williem Iskandar, Medan
Iryani, Iryani, Department of Chemistry, Faculty of Mathematics and Natural Sciences, Padang State University, Padang (Indonesia)

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