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Bioresources and Bioprocessing

Table 1 r NAD + / r NADH ratio at different instants under different operation conditions

From: Improving the stability of glutamate fermentation by Corynebacterium glutamicum via supplementing sorbitol or glycerol

Time (h)

Fermentation batches

Batch #1

Batch #2

Batch #3

Batch #4

Batch #5

Batch #6

14

1.11

0.85

1.10

0.78

1.03

0.90

16

1.11

0.92

1.13

0.85

0.94

0.94

18

1.02

0.83

1.15

0.83

0.98

0.90

20

0.94

0.66

1.10

0.89

0.93

0.88

22

0.93

0.58

1.08

0.84

0.97

0.87

24

0.89

0.56

1.15

0.95

0.89

0.91

26

0.93

0.59

1.09

0.96

0.94

0.86

28

0.72

0.64

0.95

0.82

0.76

0.82

  1. Batch #1, normal batch (control); batch #2, abnormal batch without sorbitol or glycerol; batch #3, sorbitol co-fed with glucose; batch #4, 15 g/L sorbitol added in the initial medium; batch #5, glycerol co-fed with glucose; batch #6, 10 g/L glycerol added in the initial medium.
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