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Spray drying technique. (I) Schematic diagram of spray dryer and its component; (II) scanning electron microscope image of spray-dried mannitol, (A) at 60 °C, (B) at 90 °C, and (C) at 120 °C of outlet temperature. Reproduced with permission from [107], Elsevier, 2011; (III) schematic diagram of different nozzles.
