Application of Multi-Level Factorial Design in Optimisation of Ultrasound-assisted Extraction (UAE) Condition from Erythrina variegata L. Leaves on Antioxidant Activities
Nur Fazira Abdul Rahim, Norhayati Muhammad, Fazleen Izzany Abu Bakar, Mohd Fadzelly Abu Bakar, Siti Fatimah Sabran, Furzani Pa’ee, Balkis A. Talip, Ain Zamira Muhamad Zamri, Rozaliana Ab Karim, Nur Zainatul Nadra Zainol, Aliff Hisyam A Razak, and Rabiah Ahmad