Table 1.
Mean AT%c | SD AT% | Min. AT% | Max. AT% | n | P‐value t‐test versus deada | P‐value t‐test versus w/o e−‐donorb | |
---|---|---|---|---|---|---|---|
13CO2 + CO | 1.284 | 0.013 | 1.274 | 1.299 | 3 | 5e‐10 | 0.56 |
13CO2 + H2 | 1.295 | 0.038 | 1.257 | 1.332 | 3 | 5.2e‐07 | 0.83 |
13CO2 w/o e−‐donor | 1.303 | 0.048 | 1.26 | 1.355 | 3 | 2.3e‐06 | – |
Dead worms | 1.072 | 0.001 | 1.07 | 1.073 | 6 | – | – |
P‐values for comparisons of 13C‐content in worms from incubations versus dead worms (t‐test, one‐tailed, H0 = 13C‐content of live worms is not higher than that of dead worms). After Bonferroni correction for three comparisons the significance threshold P < 0.01 corresponds to P < 0.003.
P‐values for comparisons of 13C‐content in worms incubated without additional energy source versus incubations with CO or H2 added (t‐test, two‐tailed, H0 = means are equal).
The detailed data including the measurements on the standard caffeine can be found in Table S3.
AT%: atom percent [13C / (12C + 13C) × 100]. w/o e−‐donor: without an additional energy source added to the incubations. n: total number of bulk worm samples (each containing eight worms).