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1.
Figure 2

Figure 2. From: A comparison of three pH control methods for revealing effects of undissociated butyric acid on specific butanol production rate in batch fermentation of Clostridium acetobutylicum.

Effect of CaCO3 supplementation on butanol production by C. acetobutylicum (A: CaCO3 supplementation at 2 g/L; B CaCO3 supplementation at 5 g/L; C: CaCO3 supplementation at 8 g/L).

Xuepeng Yang, et al. AMB Express. 2013;3:3-3.
2.
Figure 3

Figure 3. From: A comparison of three pH control methods for revealing effects of undissociated butyric acid on specific butanol production rate in batch fermentation of Clostridium acetobutylicum.

Effect of NaOAc buffering on butanol production by C. acetobutylicum (A: NaOAc buffering at initial pH 4.6; B NaOAc buffering at initial pH 5.0; C: NaOAc buffering at initial pH 5.6).

Xuepeng Yang, et al. AMB Express. 2013;3:3-3.
3.
Figure 4

Figure 4. From: A comparison of three pH control methods for revealing effects of undissociated butyric acid on specific butanol production rate in batch fermentation of Clostridium acetobutylicum.

Correlation between fermentation pH (24 h) and maximum biomass (36 h) in the batch fermentation of C. acetobutylicum.

Xuepeng Yang, et al. AMB Express. 2013;3:3-3.
4.
Figure 1

Figure 1. From: A comparison of three pH control methods for revealing effects of undissociated butyric acid on specific butanol production rate in batch fermentation of Clostridium acetobutylicum.

Effect of NaOH neutralization on butanol production by C. acetobutylicum (A: fermentation control without pH control; B neutralization at 12 h; C: neutralization at 24 h; D: neutralization at 36 h).

Xuepeng Yang, et al. AMB Express. 2013;3:3-3.
5.
Figure 5

Figure 5. From: A comparison of three pH control methods for revealing effects of undissociated butyric acid on specific butanol production rate in batch fermentation of Clostridium acetobutylicum.

Correlation between undissociated butyric acid concentration (24 h) and specific butanol production rate (between 24 and 36 h) in the batch fermentation of C. acetobutylicum.

Xuepeng Yang, et al. AMB Express. 2013;3:3-3.

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