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- W3155702271 abstract "ABSTRACT Environmental pH and gut transit rate are the key factors determining the dynamics of colonic microbiota. In this study, the effect of changing pH on the composition and metabolism of pooled faecal microbiota was elucidated at physiologically relevant dilution rates Dhigh = 0.2 and Dlow = 0.05 1/h. The results showed the best adaptability of Bacteroides ovatus within the pH range 6.0–8.0 at both dilution rates. The butyrate producing Faecalibacterium and Coprococcus comes were extremely sensitive to pH > 7.5, while the abundance of Akkermansia muciniphila increased significantly at pH >7 at Dhigh, causing a pH-dependant shift in the dynamics of mucin degrading species. Increased gas formation was observed at pH < 6.5. Substantially more CO2 was produced at Dlow than at Dhigh (18-29 vs 12–23 mmol per L medium, respectively). Methane was produced only at Dlow and pH > 7, consistent with the simultaneous increased abundance of Methanobrevibacter smithii. Our study confirmed the importance of pH in the development of faecal microbiota in pectin-supplemented medium. Fermentation of other dietary fibres can be studied using the same approach. The significance of pH should be more emphasized in gut research and diagnostics." @default.
- W3155702271 created "2021-04-26" @default.
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- W3155702271 date "2021-04-01" @default.
- W3155702271 modified "2023-09-27" @default.
- W3155702271 title "Acidic pH enhances butyrate production from pectin by faecal microbiota" @default.
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- W3155702271 doi "https://doi.org/10.1093/femsle/fnab042" @default.
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