Syahara, M., Helilusiatiningsih, N., & Irawati, T. (2024). Antioxidant activity assay of Roselle (Hibiscus sabdariffa) seeds Ethanol extract with DPPH radical scavenging using UV-Vis Spectrophotometer. Journal of Natural Sciences and Mathematics Research, 10(1), 46-54. doi:https://doi.org/10.21580/jnsmr.v10i1.20515