Table 3 Residual emulsification activity (REA%) under low water activity after an incubation period of up to 30 months under standard conditions
Isolate/surfactant | Time (months) | 8% NaCl | 15% NaCl | 30% NaCl | ||||
|---|---|---|---|---|---|---|---|---|
Toluene | Hexane | Hexadecane | Toluene | Hexane | Hexadecane | Toluene | ||
Tween 80 | 29 | 2.54 ± 3.60 | 59.74 ± 7.03 | 88.89 ± 4.44 | 0.00 ± 0.00 | 0.00 ± 0.00 | 0.00 ± 0.00 | 0.00 ± 0.00 |
Bacillus sp. L45 | 30 | 96.15 ± 3.26 | 100.00 ± 0.00 | 0.00 ± 0.00 | 95.32 ± 4.26 | 93.75 ± 0.00 | 0.00 ± 0.00 | 81.03 ± 7.79 |
Paenibacillus tarimensis L88 | 30 | 0.00 ± 0.00 | 0.00 ± 0.00 | 0.00 ± 0.00 | 11.93 ± 4.02 | 0.00 ± 0.00 | 0.00 ± 0.00 | 16.78 ± 1.98 |
Bacillus sp. L97b | 29 | 66.52 ± 3.16 | 77.28 ± 6.88 | 0.00 ± 0.00 | 10.00 ± 0.50 | 12.92 ± 0.65 | 0.00 ± 0.00 | 0.00 ± 0.00 |
Bacillus sp. R40 | 29 | 64.91 ± 6.95 | 28.57 ± 1.43 | nt | 66.25 ± 8.84 | na | nt | 63.65 ± 7.52 |
Bacillus sp. R55 | 29 | 85.74 ± 5.54 | 46.67 ± 2.33 | 0.00 ± 0.00 | 91.70 ± 7.47 | na | 0.00 ± 0.00 | 87.94 ± 7.63 |