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. 2020 Dec 3;10:21090. doi: 10.1038/s41598-020-77868-4

Figure 2.

Figure 2

Inhibition of E. coli O157:H7 biofilm formation by proteinase K (prot K) and R. sativus var. longipinnatus (A), R. sativus (B) and B. oleracea var. acephala (C) extracts on stainless steel coupons. The treated concentrations of the plant extracts and proteinase K, were 1 mg/mL R. sativus var. longipinnatus extract and 100 µg/mL proteinase K, 2 mg/mL R. sativus extract and 100 µg/mL proteinase K, and 4 mg/mL B. oleracea var. acephala extract and 200 µg/mL proteinase K. The control is biofilm formation of E. coli O157:H7 on stainless steel without any treatment. Error bars represent standard error. Different lowercase letters are significantly different (P ˂ 0.05).