Table 4.
The bacteriostatic efficiency of 11-2-11-2Y, 13-2-13-2Y, 15-2-15-2Y (Y = HCOO−, CH3COO− and CH3CHOHCOO−) at different concentration (g l−1) at 37°C.
| Gemini surfactant |
P. aeruginosa (%) |
E. coli (%) |
S. aureus (%) |
B. subtilis (%) |
||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0.01 | 0.05 | 0.1 | 0.01 | 0.05 | 0.1 | 0.01 | 0.05 | 0.1 | 0.01 | 0.05 | 0.1 | |
| 11-2-11-2HCOO− | 62.7 | 78.4 | 91.6 | 64.3 | 86.4 | 91.3 | 77.2 | 80.9 | 93.2 | 64.3 | 86.4 | 91.3 |
| 11-2-11-2CH3COO− | 60.7 | 68.5 | 83.1 | 60.3 | 82.8 | 86.7 | 75.7 | 80.0 | 92.3 | 60.3 | 82.8 | 86.7 |
| 11-2-11-2CH3CHOHCOO− | 54.9 | 67.2 | 75.3 | 53.9 | 74.2 | 82.7 | 75.1 | 79.3 | 89.3 | 53.9 | 74.2 | 82.7 |
| 13-2-13-2HCOO− | 63.0 | 80.2 | 92.0 | 66.8 | 87.3 | 92.9 | 78.4 | 82.4 | 93.8 | 66.8 | 87.3 | 92.9 |
| 13-2-13-2CH3COO− | 62.5 | 71.9 | 87.3 | 62.7 | 87.0 | 90.9 | 77.4 | 81.9 | 93.4 | 62.7 | 87.0 | 90.9 |
| 13-2-13-2CH3CHOHCOO− | 58.9 | 67.0 | 77.6 | 54.5 | 82.0 | 89.5 | 76.3 | 80.8 | 92.8 | 54.5 | 82.0 | 89.5 |
| 15-2-15-2HCOO− | 76.0 | 87.7 | 92.9 | 68.8 | 89.6 | 93.5 | 80.2 | 84.4 | 94.7 | 68.8 | 89.6 | 93.5 |
| 15-2-15-2CH3COO− | 63.0 | 84.1 | 91.2 | 61.6 | 88.6 | 91.9 | 79.4 | 84.5 | 94.7 | 61.6 | 88.6 | 91.9 |
| 15-2-15-2CH3CHOHCOO− | 59.1 | 76.6 | 81.5 | 60.9 | 82.7 | 90.5 | 77.9 | 83.3 | 94.6 | 60.9 | 82.7 | 90.5 |
| benzalkonium chloride solution | \ | \ | 76.0 | \ | \ | 74.0 | \ | \ | 79.0 | \ | \ | 74.0 |