Table 2.
Summary of the screening tests for biosurfactant producers.
| Isolate nos. |
Screening tests | |||||
|---|---|---|---|---|---|---|
| OST | BAHT | DCT | CTAB | TGST | ST | |
| (cm) | (cm) | (cm) | (Green halo) | (+/−) | (mN/m) | |
| RT1 | 2.0 | 2.2 | 0.4 | n.o. | + | 62.3 |
| RT2 | 2.5 | 3.1 | 1.1 | n.o. | − | 39.7 |
| RT3 | 1.3 | 1.8 | 0.2 | Green halo | + | 37.6 |
| RT4 | 2.4 | 2.6 | 1.6 | n.o. | − | 42.6 |
| RT5 | 1.7 | 1.5 | 1.3 | n.o. | − | 59.5 |
| RT6 | 1.0 | 2.5 | 0.5 | n.o. | + | 48.8 |
| RT7 | 2.7 | 3.0 | 1.2 | n.o. | − | 53.2 |
| RT8 | 1.4 | 2.5 | 0.4 | Green halo | + | 42.1 |
| RT9 | 1.7 | 1.9 | 0.0 | n.o. | − | 60.0 |
| RT10 | 3.0 | 3.5 | 1.7 | n.o. | − | 29.8 |
| RT11 | 2.1 | 2.8 | 0.5 | n.o. | − | 64.6 |
OST: oil spreading technique; BAHT: blood agar Hemolysis test; DCT: drop collapse test;CTAB: CTAB agar plate test;TGST: tilting glass slide test; ST: surface tension; n.o.: not observed; “+”: flow observed; “−”: flow not observed.