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SEM graphics of Radix Salviae miltiorrhizae samples. (A) Raw materials, (B) extracted by DES-based microwave-assisted, (C) 75% methanol-based microwave-assisted extraction, (D) water-based microwave-assisted extraction, (E) DES-based ultrasound-assisted treatment. (F) 75% methanol-based ultrasound-assisted extraction, (G) DES-based hot reflux-assisted extraction, and (H) 75% methanol-based hot reflux-assisted extraction.
