Polysaccharide breakdown by mixed populations of human faecal bacteria
نویسندگان
چکیده
منابع مشابه
Contribution of acetate to butyrate formation by human faecal bacteria.
Acetate is normally regarded as an endproduct of anaerobic fermentation, but butyrate-producing bacteria found in the human colon can be net utilisers of acetate. The butyrate formed provides a fuel for epithelial cells of the large intestine and influences colonic health. [1-(13)C]Acetate was used to investigate the contribution of exogenous acetate to butyrate formation. Faecalibacterium prau...
متن کاملXenobiotic breakdown by mixed cultures.
Conclusion The interactions of methanogens with other organisms in natural habitats are various. At a metabolic level methanogens may compete for substrates with other bacteria and are involved in mutualistic interactions with non-methanogenic bacteria. Mutualism between methanogens and protozoa also occurs and, in addition, methanogens interact physically as episymbionts of rumen ciliates. Kno...
متن کاملCompetition for hydrogen by human faecal bacteria: evidence for the predominance of methane producing bacteria.
Studies of sludge have shown that some species of sulphate reducing bacteria outcompete methane producing bacteria for the common substrate H2. A similar competition may exist in human faeces where the methane (CH4) producing status of an individual depends on the faecal concentration of sulphate reducing bacteria. To determine if non-methanogenic faeces outcompete CH4 producing faeces for H2, ...
متن کاملInhibition by cocoa extracts of biosynthesis of extracellular polysaccharide by human oral bacteria.
Extracts of defatted cocoa inhibited the biosynthesis of extracellular polysaccharide by both cell-free and cell-associated streptococcal glucosyltransferases, but did not affect growth or acid production. Both water-insoluble and water-soluble polysaccharide syntheses were inhibited, and the net result was a shift away from adherence-supportive polysaccharide. Inhibition was non-competitive wi...
متن کاملRapid differentiation of certain bacteria in mixed populations by gas-liquid chromatography.
Although cellular alterations occurring during infection may reflect a general response to perturbation associated with pathogenesis rather than a specific response to the virulent agent (1, 2), the biochemical changes effected in the host by a pathogen may be highly specific and detectable by ultrasensitive gas-liquid chromatographic (glc) techniques (3, 4). However, such chromatographic analy...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: FEMS Microbiology Letters
سال: 1987
ISSN: 0378-1097,1574-6968
DOI: 10.1111/j.1574-6968.1987.tb02352.x