Pengaruh ph terhadap stabilitas aktivitas antioksidan ekstrak kasar kunyit kuning (curcuma domestica val.) dan “kunyit putih” (kaempferia rotunda l.) = Effect of ph on stability of antioxidant activity in yellow turmeric (curcuma domestica val.) And “white turmeric” (kaempferia rotunda l.) Crude extract - Tjiawi, Megan (2015)