Sulphate reducing bacteria and hydrogen metabolism in the human large intestine.

Sulphate reducing bacteria and hydrogen metabolism in the human large intestine.

Energy metabolism and phylogenetic diversity of sulphate-reducing bacteria

Sulphate-reducing bacteria (SRB) are those prokaryotic microorganisms, both bacteria and archaea, that can use sulphate as the terminal electron acceptor in their energy metabolism, i.e. that are capable of dissimilatory sulphate reduction. Most of the SRB described to date belong to one of the four following phylogenetic lineages (with some examples of genera): (i) the mesophilic d-proteobacte...

Sulphate Reducing Bacteria and Mackinawite Stability

Introduction: The formation of sedimentary iron monosulphides (mackinawite, greigite) and pyrite is strongly interlinked with bacterial sulphate reduction, and thus with the global geochemical Fe, S and C cycles [1, 2]. The inorganic formation and stability of FeS phases at T < 100 ̊C has been extensively studied due to their vital importance in the sedimentary pyrite formation processes [e.g., ...

Importance of Sulphate-reducing Bacteria in Environment

The sulphate-reducing bacteria represent the part of the biosphere, the active component in the cycle of elements in the biosphere and as shown by the existing knowledge they are becoming also the part of the environmental industrial technologies. The objective of this work was to give principal information concerning characteristics, the occurrence and the importance of sulphate-reducing bacte...

Urea and ammonia metabolism in the human large intestine.

Man passes each day 100-200 g faeces containing 1-2 g bound nitrogen. The chemical nature of this N is not completely clear, although recent studies suggest that it lies predominantly in faecal bacteria, which collectively make up 40-7070 of faecal wet weight (Stephen & Cummings, 1980). The work we shall present here is concerned with the analysis of this faecal N, and here one immediately come...