TY - Bulletin of Botanical Research A1 - LUO Meng1,2;SONG Zhuo-Yue1,2;HU Jiao-Yang1,2;MU Fan-Song1,2*;QIAO Qi1,2;ZU Yuan-Gang1,2 T1 - Optimization of Ultrasonic-assisted Extraction of Total Flavonoids from Crataegus pinnatifida Leaves and Its Antioxidant Activities Y1 - 2015-07-20 JF - Bulletin of Botanical Research JO - Bulletin of Botanical Research SP - 632 EP - 637 VL - 35 IS - 4 UR - https://bbr.nefu.edu.cn N1 - 10.7525/j.issn.1673-5102.2015.04.025 ER -