Yandri Yandri
Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Lampung, Bandar Lampung 35145,
Indonesia

Hendri Ropingi
Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Lampung, Bandar Lampung 35145,
Indonesia

Tati Suhartati
Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Lampung, Bandar Lampung 35145,
Indonesia

Bambang Irawan
Department of Biology, Faculty of Mathematics and Natural Sciences, University of Lampung, Bandar Lampung 35145,
Indonesia

Sutopo Hadi
Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Lampung, Bandar Lampung 35145,
Indonesia