Kinetics of acid toxicity in cultures ofXanthomonas campestris

Esgalhado, M.Eugénia; Roseiro, J. Carlos; Collaço, M.T. Amaral

doi:10.1006/fmic.1996.0050

Cited by 11 publications

(6 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1A and 1B shows that when the xanthan production reduced to 81.57% and 22.99% of control when formic acid and acetic acid concentration reached 0.6 g L -1 and 0.75 g L -1 respectively. The results in accordance with Esgalhado's report [12] that weak acid inhabitation on bacteria increased with the concentration at a certain external pH. Some researchers consider that uncoupling effects lead to inhabitation [13].…”

Section: Resultssupporting

confidence: 91%

Xanthan production with the hydrolysate of wheat straw

Zhang¹

2015

Proceedings of the 2015 6th International Conference on Manufacturing Science and Engineering

View full text Add to dashboard Cite

Hydrolysate of steam-exploded wheat straw (SEWS) was used as the carbon source of xanthan production. The effects of common inhibitors generated during steam explosion on xanthan production were evaluated; a combine method was used to improve the fermentability of enzymatic hydrolysate of SEWS. All the three groups of compounds (weak acid, furan derivatives and phenolic compounds) inhibited xanthan generation; furan derivatives and phenolic compounds could be reduced by using the combinations of low steam pressure and long maintain time; flocculation was effective to remove phenolic compounds; weak acid and furan derivatives could be removed when SEWS was air-dried. Using the detoxified hydrolysate of SEWS, the xanthan production attained 20.7 g L-1 and the yield was 0.62 g xanthan per g sugar (glucose and xylose). It was concluded that SEWS is a potential carbon source of xanthan fermentation.

show abstract

Section: Resultssupporting

confidence: 91%

Xanthan production with the hydrolysate of wheat straw

Zhang¹

2015

Proceedings of the 2015 6th International Conference on Manufacturing Science and Engineering

View full text Add to dashboard Cite

show abstract

“…The effect of acid toxicity can be expressed by the decrease of the maximum growth rate and an extended length of the lag phase. Increasing toxicity with the organic acid concentration has been reported in the literature for several microorganisms [17]. Low hexanoic acid concentration allows higher maximum growth rates (0.22 h À1 , for experiments 9-12).…”

Section: Acid Stress Effects On Growth Curvementioning

confidence: 93%

“…The presence of the acid molecules leads to the inhibition of the microbial activity due to pH-dependent acid toxicity, where the undissociated form of the acid molecule (obtained at pH values near to the acid pK a ) diffuses into the cytoplasm [13,17]. Inside the cell the acid dissociates and decreases the internal pH, leading to metabolic failure inducing a proportional decrease in specific growth rate.…”

Section: Acid Toxicity In L Rhamnosus Culturesmentioning

confidence: 99%

The effect of acid stress on lactate production and growth kinetics in Lactobacillus rhamnosus cultures

Yáñez

Marques

Gı́rio

et al. 2008

Process Biochemistry

View full text Add to dashboard Cite

“…Effects aluminum and fluoride additions on the yield coefficient (Y) during Fe(II) oxidation by S. thermosulfidooxidans. Experimental conditions 2.5 g L −1 Fe 2+ ; 0.1 g L −1 yeast extract; Norris growth medium, pH 1.5; 300 min −1 and 50 which pump protons out of the cell, has been shown to result in an increase in the respiration rate with a decrease in cell growth and thus cell yield [26]. Slightly higher yield values were observed in the experiments with aluminum-a consequence of its positive effect on bacterial growth (Fig.…”

Section: Tablementioning

confidence: 99%