Antioxidant activity test of ethanol extract of red algae (Kappaphycus alvarezii) green variety from north coasts of Jepara district with DPPH method. JOHMPE [Internet]. 2023 Jan. 19 [cited 2026 Sep. 20];1(1). Available from: https://shmpublisher.com/index.php/johmpe/article/view/133