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Table 1 Oil/water interfacial tension between diesel oil and solutions containing different surfactants

From: Designer bioemulsifiers based on combinations of different polysaccharides with the novel emulsifying esterase AXE from Bacillus subtilis CICC 20034

Oil/water phase σ (mN/m)
Diesel/H2O 26.64 ± 0.02
Diesel/Tris–HCl buffer 21.25 ± 0.07
Diesel/SDS 1.72 ± 0.01
Diesel/BSA 17.41 ± 0.09
Diesel/AXE 16.09 ± 0.07
Diesel/xanthan gum 25.20 ± 0.11
Diesel/Tween 20 3.89 ± 0.02
  1. The oil/water interfacial tension was measured at 25 °C by the du Nouy ring method, and 500 µg/ml protein or surfactant were dissolved in Tris–HCl buffer solution (50 mM, pH 7.4)