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Table 2 Biosurfactant activity, esterase activity, extracellular protein and biosurfactant yield of Bacillus subtilis SK320 on various substrates after 72 h

From: Enhanced biosurfactant production through cloning of three genes and role of esterase in biosurfactant release

Substrate Biosurfactant activity (OD at 55 nm) Esterase activity (IU/ml) Extracellular Protein (micrograms/ml) Biosurfactant Recovery (g/L)
Vegetable oil 0.048 0.4248 2.66 0.15
Glycerol 0.137 0.6616 2.37 0.21
Maltose 0.074 0.7929 1.23 0.18
n-dodecane 0.019 0.1338 0.32 0.08
Mobile oil 0.035 0.1853 0.18 0.09
Crude oil 0.014 0.1081 0.23 0.06
Olive oil 0.859 4.382 6.97 1.2
Glucose 0.185 0.3552 2.37 0.27
Sucrose 0.121 0.5097 2.29 0.19
  1. † Results represented as mean of at least three replicate experiments