| Sensor strains | Control strains | ||
---|---|---|---|---|
 | S. aureus RN4220 (pcadCPcadAlux) | B. subtilis BR151 (pcadCPcadAlux) | S. aureus RN4220 (p602/22lux)a | B. subtilis BR151 (pBL1/p602/22lux)b |
Background luminescence c | 81 ± 30 | 84 ± 30 | 750 ± 70 | 120 ± 40 |
Maximum induction d | 30 | 4 | no induction | no induction |
No of cells in the test (100 μl) | 107 | 107 | 107 | 107 |
Compound | Limit of determinatione/Toxicityf, M (mg of compound l-1) | Toxicity (2-h EC50g), M (mg of compound l-1) | ||
HgCl 2 | 10-8 (0.003)/5 × 10-7 (0.1) | 4 × 10-8 (0.01)/5 × 10-7 (0.1) | 5 × 10-8 (0.01) | 10-7 (0.04) |
CdCl 2 | 4 × 10-8 (0.007)/10-5 (2.75) | 10-8 (0.002)/10-7 (0.027) | 8 × 10-7 (0.2) | 3 × 10-6 (0.6) |
ZnSO 4 h | 2 × 10-5 (3.2)/5 × 10-4 (81) | 10-5 (1.6)/10-4 (24) | 8 × 10-5 (13) | 10-4 (22) |
Pb(NO 3 ) 2 | 10-7 (0.03)/10-3 (500) | 10-7 (0.03)/10-3 (500) | 10-3 (530) | 3 × 10-3 (990) |