Table 3 Acetylene-reduction rates in Japanese faecal samples.

From: Nitrogen fixation and nifH diversity in human gut microbiota

Sample ID

Time between sampling and assay a (h)

Acetylene reduction rates (nmol/g/h)

Unfrozen

Frozen

N001-1 b

8

1.390 ± 0.237

0.472 ± 0.109

N001-2 b

6

1.608 ± 0.422

0.954 ± 0.010

N002

8

0.660 ± 0.403

N. A.

N003

15.5

0.466 ± 0.117

0.049 ± 0.034

N004

16.5

0.331 ± 0.127

0.082 ± 0.055

N005

27

0.055 ± 0.010

N. A.

  1. aTime between defecation and the addition of acetylene to the unfrozen samples or freezing (the frozen samples).
  2. bN001-1 and N001-2 were sampled from the same individual (N001) on different days.
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