Maharani, Zahra Febriana, Nanda Dwi Akbar, and Margareta Retno Priamsari. 2025. “Optimization of Ethanol Extract Gel Nanoparticle Formulation of Secang Wood (Caesalpinia Sappan L.) As Antibacterial Against Propionibacterium Acnes: Optimization of Ethanol Extract Gel Nanoparticle Formulation of Secang Wood (Caesalpinia Sappan L.) As Antibacterial Against Propionibacterium Acnes”. PHARMADEMICA : Jurnal Kefarmasian Dan Gizi 5 (1):16-25. https://doi.org/10.54445/pharmademica.v5i1.80.