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SEM images and corresponding size distributions of the chitosan particles prepared from various precursor concentrations (Table 1). (a) C1 (5 × 10−5 w/v%), (b) C2 (5 × 10−4 w/v%), (c) C3 (5 × 10−3 w/v%), (d) C4 (0.01 w/v%), (e) C5 (0.05 w/v%), and (f) C6 (0. 1 w/v%), at a fixed airflow rate of 0.075 L/min and a constant inlet temperature of 130 °C. (scale bar = 1 µm).
