Effect of variation of amount of extracting solutions on total flavonoid currency of ethanol extract of kelor leaves (Moringa oleifera L.)Nining Sugihartini, Anindita Kusuma Putri, Aprilia Kusbandari and Dini HanifahBIO Web Conf., 148 (2024) 04010DOI: https://doi.org/10.1051/bioconf/202414804010