Table 2.
Degradation of various alkanes and alkenes by ethylene-grown ETY-M and ETY-NAG
| Substrates | Residual gas hydrocarbons (%) | ||
|---|---|---|---|
|
| |||
| ETY-M (A) | ETY-M (B) | ETY-NAG | |
| Methane | 121 (0.11) | ND | 98 (0.01) |
| Ethane | 0.38 (0.05) | 0.48 (0.07) | 0.06 (1 × 10−4) |
| Ethylene | ND | 0.02 (0.03) | 0.15 (1.3 × 10−4) |
| Propane | 58 (0.1) | 9.3 (0.03) | 26 (0.02) |
| Propylene | ND | 1.0 (0.008) | 4.6 (0.04) |
| i-Butane | 122 (0.06) | 91 (0.05) | 102 (0.01) |
| n-Butane | 118 (0.09) | 90 (0.05) | 102 (0.02) |
For ETY-M, experiments ETY-M (A) and ETY-M (B) were done simultaneously but separately; 5 μL of mixed gas (A) containing 1% each of methane, ethane, propane, i-butane, and n-butane was injected into a vial for ETY-M (A), and 5 μL of mixed gas (B) containing 1% each of ethane, ethylene, propane, propylene, i-butane, and n-butane was injected into a vial for ETY-M (B). For ETY-NAG, 5 μL of mixed gas (A) and (B) was injected into a vial. Total protein concentrations of ETY-M and ETY-NAG, were 0.52 mg L−1 and 0.07 mg L−1, respectively. ND, not determined. Values given in parentheses are standard deviations for three replicates in ETY-M (A) and ETY-M (B) and are the half differences of two replicates in ETY-NAG.