ISOLATION, CHARACTERIZATION AND EVALUATION OF ANTIOXIDANT ACTIVITY OF SILICA CELLULOSE NANOCOMPOSITE (SiO2-CNC) EXTRACTED FROM BIO-WASTE (RICE HUSK) INTEGRATED WITH CALLISTEMON CITRINUS EXTRACT. FJS. 2025;9(2):220-230. doi:10.33003/fjs-2025-0902-3176