Table 3 Emulsification and surface tension reducing activity of the biosurfactant produced by different strains over a wide range of pH
Strain/organism | pH | E24 (%) | Surface tension (mN/m) | References |
|---|---|---|---|---|
P. otitidis P4 | 3 | 44.4 | 34.7 | This study |
4 | 46.8 | 33.8 | ||
5 | 59.3 | 33.9 | ||
6 | 62.5 | 33.5 | ||
7 | 68.7 | 33.4 | ||
8 | 60.6 | 33.5 | ||
9 | 63.6 | 34.1 | ||
10 | 62.5 | 34.2 | ||
11 | 54.5 | 34.0 | ||
Ochrobactrum 1C | 4 | 70.58 | 31.0 | Ferhat et al. (2011) |
7 | 93.0 | 31.0 | ||
9 | 95.0 | 30.5 | ||
11 | 95.0 | 30.5 | ||
Pseudomonas sp. 2B | 2 | 57.0 | 34.19 | Aparna et al. (2012) |
4 | 67.0 | 31.48 | ||
6 | 73.0 | 30.39 | ||
7 | 84.0 | 28.39 | ||
8 | 80.0 | 30.0 | ||
10 | 75.0 | 34.0 | ||
12 | 69.0 | 35.0 | ||
Bacillus siamensis RT10 | 2 | 56.0 | 39.0 | Varadavenkatesan and Murty (2013) |
4 | 65.5 | 39.0 | ||
6 | 70.0 | 39.0 | ||
7 | 69.0 | 39.0 | ||
8 | 65.0 | 39.0 | ||
10 | 67.5 | 39.0 | ||
12 | 60.0 | 38.8 |