Fig. 6From: Cellulase activity of a novel bacterial strain Arthrobacter woluwensis TDS9: its application on bioconversion of paper mill sludgeEffect of A reaction time, B temperature, C pH of buffer, D substrates, E nitrogen sources, F metal ions, and G surfactants and reductants on enzyme activity obtained from A. woluwensis TDS9. Each parameter was kept constant in the following steps upon optimization. ****indicates statistical significance value, P < 0.0001Back to article page