Muchtar, Zainuddin, Departement of Chemistry, Faculty of Mathematics and Natural Science, Medan State University, 20221, Indonesia (Indonesia)
Muchtar, Zainuddin, Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Negeri Medan, 20221, Indonesia (Indonesia)
Muhammad Yusuf, Muhammad Yusuf, Department of Chemistry Universitas Negeri Medan Jl. Willem Iskandar Pasar V Medan Estate, Medan 20221, Indonesia (Indonesia)
Munte, Felivia Angelina, Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Negeri Medan (Indonesia)
Munzirwan, Rudi, Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Negeri Medan (Indonesia)

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