Table 2.
Inhibitory concentrations of NTO and ATO (in mM) determined in methanogenic activity, aerobic heterotrophs activity, and Microtox (A. fischeri) assays.
| Compound | Methanogens | Aerobic heterotrophs | A. fischeri | ||||||
|---|---|---|---|---|---|---|---|---|---|
|
| |||||||||
| Concentration tested (mM) |
IC20 | IC50 | Concentration tested (mM) |
IC20 | IC50 | Concentration tested (mM) |
IC20 | IC50 | |
| NTO | 0.1 – 25.0 | 0.19 (0.12 – 0.25) | 1.15 (0.95 – 1.40) | 1.0 – 32.0 | NTa | NTa | 0.1 – 30.4 | 19.16 (14.88 – 23.46 | NTa |
| ATO | 3.1 – 62.8 | NTa | NTa | 1.0 – 32.0 | NTa | NTa | 1.5 – 97.6 | 22.43 (18.66 – 26.38) | 82.00 (71.51 – 96.82) |
a
Compound was not toxic at the highest concentration tested (NT = non-toxic)