Fig. 5From: A novel Serratia sp. ZS6 isolate derived from petroleum sludge secretes biosurfactant and lipase in medium with olive oil as sole carbon sourceZS6 lipase activity at various conditions. Initial activity is based on the condition at 37 °C, pH 7, without salinity, and no additional metal ions or organic solvent. Lipase activity under conditions of various temperatures (a), acidities (b), salinities (c), metal ion additions (d), and organic solvents (e)Back to article page