Epindonta , M. and Saragih , H. 2026. Synthesis and Characterization of Gardenia Essential Oil Nanoparticles Using a PEG-40 Hydrogenated Castor Oil Protective Polymer Layer. Journal of Pharmaceutical and Sciences. 9, 2 (Jun. 2026), 1697–1710. DOI:https://doi.org/10.36490/journal-jps.com.v9i2.1547.