Maximum H2 in cultures amended with chloral hydrate or trichloroethanol, and trichloroacetic acid or trichloroethylene
| Culture | Ch/Tce | TCA/TCE |
| CH4 | ||
| Mean | 240 | 55 |
| Range | (100–900) | (40–90) |
| Non-CH4 | ||
| Mean | 3.8 | 2.0 |
| Range | (2–10) | (1.8–3) |
Data are means (range) of maximum H2 measurements ([alkyl halide] = 1–10 mM) normalised to mean control culture H2 for each experiment: CH4 = methanogneic cultures (n=16), non-CH4 = non-methanogenic cultures (n=12). Ch, chloral hydrate; Tce, trichloroethanol; TCA, trichloroacetic acid; TCE, trichloroethylene.