Penelitian penentuan kandungan total fenolik, flavonoid dan uji aktivitas antioksidan telah dilakukan terhadap ekstrak dan fraksi umbi bawang dayak (Eleutherine bulbosa MILL.) yang tumbuh di Riau. Pengujian aktivitas antioksidan dilakukan dengan menggunakan metode DPPH (2,2- diphenyl-1- picrilhydrazil), pengujian total fenolik dan flavonoid dilakukan dengan menggunakan metode Folin Ciocalteu da…
The research towards antioxidant activity and the enzyme tyrosinase inhibition in vitro from extract leaf petai belalang (Archidendron clypearia (Jack) Nielson). Testing of antioxidant activity using the DPPH method with vitamin C as comparison, testing the enzyme tyrosinase inhibition using L-tyrosine as a substrate and kojic acid as comparison. Testing of antioxidant activity showed IC50 extr…