Optimization Extraction of Shikonin Using Ultrasound-Assisted Response Surface Methodology and Antibacterial Studies

Figure 4

Effects of shikonin on the time-kill curve, mean ± SD: (a) E. coli (ATCC 25922), (b) Salmonella pullorum (C79-13) (c) S. aureus (ATCC 25923), (d) EYAC 15-12, (e) SYAC 16-10, and (f) staYAC 16-5.

(a)

(b)

(c)

(d)

(e)

(f)