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Violacein production by Chromobacterium violaceum ATCC 12472 at different concentrations. C. aurea extracts: Ca.E—Ethanol, Ca.A—Acetone, and Ca.Y—Ethyl acetate extract. Data presented are mean ± SD, n = 3. Different letters represent statistical difference at p-value = 0.05 (GLM: generalized linear model and LSD: least significant difference).
