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Table 2 The dynamic changes of the important metabolites

From: Periodic-peristole agitation for process enhancement of butanol fermentation

Time (h)

36 h

48 h

96 h

108 h

NADH/NAD+

0.16 ± 0.056a

0.24 ± 0.079a

0.1 ± 0.026a

0.07 ± 0.012a

0.12 ± 0.017b

0.17 ± 0.069b

0.06 ± 0.01b

0.05 ± 0.020b

0.15 ± 0.037c

0.21 ± 0.092c

0.04 ± 0.02c

0.02 ± 0.011c

NADPH/NADP+

4.2 + 1.5a

10.32 + 1.8a

5.67 + 1.6a

2.21 + 1.83a

3.45 + 0.98b

7.64 + 2.91b

3.46 + 1.79b

1.14 + 0.31b

3.98 + 1.7c

5.65 + 1.79c

2.74 + 1.49c

0.67 + 0.38c

AcCoA**

1.37 ± 0.68a

2.10 ± 0.14a

1.90 ± 0.26a

0.07 ± 0.02a

1.06 ± 0.42b

1.65 ± 0.11b

2.33 ± 0.17b

0.11 ± 0.03b

1.34 ± 0.69c

2.17 ± 0.19c

1.84 ± 0.43c

0.03 ± 0.02c

ATP**

3.54 ± 0.82a

3.86 ± 0.23a

2.34 ± 0.14a

1.45 ± 0.15a

4.27 ± 0.17b

2.88 ± 0.47b

1.93 ± 0.13b

1.11 ± 0.10b

3.31 ± 0.21c

3.59 ± 0.56c

1.35 ± 0.09c

0.863 ± 0.16c

 

27.2 ± 1.9a

28.5 ± 2a

39.8 ± 2.8a

25.3 ± 1.3a

Oleic acid**

25.7 ± 1.8b

25.7 ± 0.8b

32.4 ± 2.6b

27.2 ± 2.1b

 

34 ± 2.4c

35.2 ± 1.4c

49.9 ± 2.5c

46.2 ± 3.6c

 

23.6 ± 0.9a

35.1 ± 2a

31.8 ± 2.2a

28.3 ± 1.4a

Stearic acid**

25.5 ± 1.3b

36.7 ± 1.9b

29.4 ± 1.2b

29.9 ± 2.1b

 

26.1 ± 0.8c

37.2 ± 1.6c

21.2 ± 1.9c

11.7 ± 1.6c

Linoleic acid**

35.9 ± 0.6a

15.7 ± 0.9a

18.3 ± 1.1a

19.4 ± 1.4a

32.9 ± 1.0b

13.4 ± 0.4b

15.5 ± 0.5b

15.9 ± 0.8b

32.8 ± 0.9c

13.8 ± 1.1c

21.6 ± 1.5c

23.5 ± 1.2c

Arachidonic acid**

42.1 ± 1.5a

38.5 ± 1.5a

30.1 ± 1.2a

23.3 ± 1.3a

34.8 ± 2.1b

41.4 ± 2.1b

35.6 ± 1.3b

33.3 ± 1.8b

45.4 ± 3.6c

46.2 ± 2.8c

43.1 ± 4.4c

41.5 ± 4.5c

  1. ** Stands for the special concentration at the corresponding time point (μmol/g); which is calculated by the concentration/biomass
  2. aStands for the periodic-peristole agitation group
  3. bStands for the Stationary culture group
  4. cStands for the traditional Rushton impeller