Ag. Kirwanto, Susilo Y, Ronal T. The Effect Of Maceration Extract And Sonication Extract Of Seeds Areca Nut ( Areca Catechu L.) On Antioxidant Activity On Dpph Free Radicals ( 1,1-Diphenyl-2-Picrylhydrazyl ). J-CEKI [Internet]. 2025 Dec. 26 [cited 2026 Aug. 26];5(1):3831-7. Available from: https://al-haramjournal.co.id/J-CEKI/article/view/14559