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Total Phenolic Content and Antioxidant Activity Test of Matoa Stem Bark Extract (Pometia pinnata J.R.Forst. & G. Forst) with DPPH. JPK : Jurnal Proteksi Kesehatan. 2026;14(2):103-111. Accessed February 7, 2026. https://jurnal.pkr.ac.id/index.php/JPK/article/view/1245