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Syafei, Minda Shafina, Chemistry Department, Universitas Negeri Medan, Jl. Willem Iskandar, Pasar V, Medan 20221, Indonesia (Indonesia)
Syahirah, Atikah Nur, Department of Chemistry, Faculty Of Mathematics annd Natural Sciences, State University of Medan (Indonesia)
Syahputra, Ricky Andi, Chemistry Depatment, Faculty of Mathematics and Natural Sciences, Universitas Negeri Medan, Jl. Willem iskandar Ps. V, Medan estate, Indonesia. (Indonesia)
Syahputra, Ricky Andi, Department of Chemistry, Universitas Negeri Medan, (Indonesia)
Syahputra, Ricky Andi, Universitas Negeri Medan (Indonesia)
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