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Effect of in situ acids removal on mixed glucose and xylose fermentation by Clostridium tyrobutyricum

Overview of attention for article published in AMB Express, October 2015
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16 Mendeley
Title
Effect of in situ acids removal on mixed glucose and xylose fermentation by Clostridium tyrobutyricum
Published in
AMB Express, October 2015
DOI 10.1186/s13568-015-0153-0
Pubmed ID
Authors

George Nabin Baroi, Ioannis V. Skiadas, Peter Westermann, Hariklia N. Gavala

Abstract

In the present study, the effect of potassium ions and increasing concentrations of glucose and xylose on the growth of a strain of Clostridium tyrobutyricum, adapted to wheat straw hydrolysate, was investigated. Application of continuous fermentation of a mixture of glucose and xylose and in situ acid removal by reverse electro enhanced dialysis (REED) was investigated as a method to alleviate potassium and end-product inhibition and consequently enhance the sugar consumption rates and butyric acid productivity. It was found that glucose and xylose were not inhibitory up to a concentration of 50 and 37 g L(-1) respectively, and that they were consumed at comparable rates when fermented alone. However, continuous fermentation of a mixture of glucose and xylose resulted in a significantly decreased xylose consumption rate compared to that of glucose alone, supporting the conclusion that C. tyrobutyricum has a lower affinity for xylose than for glucose. Potassium ions negatively affected the effective maximum growth rate of C. tyrobutyricum at concentrations higher than 5 g L(-1) exhibiting a non-competitive type of inhibition. Continuous fermentation of a glucose and xylose mixture with simultaneous acid removal by REED resulted in a two to threefold increase of the glucose consumption rate, while the xylose consumption rate was enhanced sixfold compared to continuous fermentation without in situ acid removal. Similarly, butyric acid productivity was enhanced by a factor of 2-3, while the yield remained unaffected.

Twitter Demographics

The data shown below were collected from the profiles of 3 tweeters who shared this research output. Click here to find out more about how the information was compiled.

Mendeley readers

The data shown below were compiled from readership statistics for 16 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Unknown 16 100%

Demographic breakdown

Readers by professional status Count As %
Student > Ph. D. Student 5 31%
Researcher 3 19%
Student > Bachelor 2 13%
Professor > Associate Professor 2 13%
Student > Doctoral Student 1 6%
Other 1 6%
Unknown 2 13%
Readers by discipline Count As %
Engineering 2 13%
Agricultural and Biological Sciences 2 13%
Chemical Engineering 1 6%
Biochemistry, Genetics and Molecular Biology 1 6%
Chemistry 1 6%
Other 1 6%
Unknown 8 50%

Attention Score in Context

This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 31 October 2015.
All research outputs
#11,966,199
of 15,686,308 outputs
Outputs from AMB Express
#647
of 974 outputs
Outputs of similar age
#184,633
of 286,723 outputs
Outputs of similar age from AMB Express
#69
of 78 outputs
Altmetric has tracked 15,686,308 research outputs across all sources so far. This one is in the 20th percentile – i.e., 20% of other outputs scored the same or lower than it.
So far Altmetric has tracked 974 research outputs from this source. They receive a mean Attention Score of 2.2. This one is in the 29th percentile – i.e., 29% of its peers scored the same or lower than it.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 286,723 tracked outputs that were published within six weeks on either side of this one in any source. This one is in the 30th percentile – i.e., 30% of its contemporaries scored the same or lower than it.
We're also able to compare this research output to 78 others from the same source and published within six weeks on either side of this one. This one is in the 8th percentile – i.e., 8% of its contemporaries scored the same or lower than it.