Fig. 2.

Scanning electron micrographs of Bacillus subtilis treated (8 mg/mL) with the dried citrus press-cake (CPC) extracts. A, Negative control; B, treated with 8 mg/mL extract from CPCs dried by high speed drying (HSD); C, treated 8 mg/mL extract from CPCs dried by far-infrared radiation drying at 50℃; D, treated 8 mg/mL extract from CPCs dried by freeze drying (FD)