Table 4 Emulsification and surface tension reducing activity of the biosurfactant produced by different strains over a wide range of salt concentrations
Strain/organism | Salt conc. (g/L) | E24 (%) | Surface tension (mN/m) | References |
|---|---|---|---|---|
P. otitidis P4 | 2 | 39.1 | 34.0 | This study |
4 | 55.5 | 33.72 | ||
6 | 48.8 | 33.6 | ||
8 | 46.6 | 35.0 | ||
10 | 37.7 | 34.5 | ||
Ochrobactrum 1C | 5 | 95 | 31.0 | Ferhat et al. (2011) |
10 | 79 | 30.5 | ||
50 | 90 | 31.0 | ||
100 | 64 | 31.0 | ||
Pseudomonas sp. 2B | 0 | 82.0 | 28.5 | Aparna et al. (2012) |
2 | 80.1 | 28.6 | ||
4 | 80.0 | 29.5 | ||
6 | 79.0 | 30.0 | ||
8 | 78.0 | 30.5 | ||
10 | 76.0 | 31.0 | ||
12 | 75.5 | 32.0 | ||
15 | 75.0 | 33.0 | ||
20 | 70.0 | 34.0 | ||
Bacillus siamensis RT10 | 0 | 73.5 | 39.0 | Varadavenkatesan and Murty (2013) |
2 | 70.0 | 39.5 | ||
4 | 67.5 | 40.0 | ||
6 | 66.5 | 40.1 | ||
8 | 68.0 | 40.2 | ||
10 | 66.0 | 40.3 | ||
12 | 65.0 | 40.8 | ||
15 | 67.0 | 41.0 | ||
20 | 64.0 | 42.5 |