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The effect of different concentrations of C. camphora EO on the production of violacein. (a) Effect of C. camphora EO on violacein production in C. violaceum. (b) Quantitative analysis of violacein inhibition in C. violaceum by C. camphora EO. Mean values of triplicate independent experiments and SD are shown. Bars indicate standard errors and different letters (a–c) above the bars represent significant differences (p < 0.05).
