Fig. 4From: Designer bioemulsifiers based on combinations of different polysaccharides with the novel emulsifying esterase AXE from Bacillus subtilis CICC 20034Effect of pH, salt concentration and temperature on the emulsifying activity of AXE. Diesel was used as the model hydrophobic substrate, and the concentration of AXE was 500 μg/ml in 50 mM Tris–HCl buffer, pH 7.4Back to article page