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D
Darningsih, Ribka, Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Negeri Medan (Indonesia)
Daulay, Anny Sartika, Department of Pharmacy, Universitas Muslim Nusantara Al Washliyah (Indonesia)
E
Eddiyanto, Eddiyanto, Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Negeri Medan (Indonesia)
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