TY JOUR TI Cassia fistula L. fruit: Optimal conditions for total polyphenol extraction KW Cassia fistula L. KW Osaka tree KW bioactive compounds KW extraction KW optimization KW response surface methodology KW Box-Behnken model JO Foods and Raw Materials AU Phuong, D.. AU Thuan, N.. PY 2026 IS 15 PB Kemerovo State University