Antioxidant Activity of Ethanolic Extract and Aqueous Fraction of Purple Sweet Potato (Ipomoea batatas L.) Leaves Using DPPH MethodDian Novita Wulandari, Zaenab Aqilah, Intan Azza Kamilah and Reza HakimBIO Web Conf., 209 (2026) 01002DOI: https://doi.org/10.1051/bioconf/202620901002