Phototrophs in high-iron-concentration microbial mats: physiological ecology of phototrophs in an iron-depositing hot spring

Article Abstract:

Phototrophs in high-iron-concentration microbial mats are discussed relative to physiological ecology in an iron-depositing hot spring, Chocolate Pots Hot Springs in Yellowstone National Park, the source waters of which are near a neutral pH with high concentrations of reduced iron and no sulfide. Uptake of (super.14)C bicarbonate was used to find the impact of ferrous iron on photosynthesis. An iron formation actively deposited is associated with cyanobacterial mats and oxygen concentration is 200% of air saturation levels in the top part of the mats. Photoautotrophy in some of the mats was stimulated by ferrous iron. This model is suitable for study of potential impact of photosynthesis on iron oxidation/mineralization and deposition of Precambrian banded iron formations.

United States, Statistical Data Included, Research, Physiological aspects, Cyanobacteria, Geology, Stratigraphic, Stratigraphy, Iron compounds, Biogeochemistry, Molecular microbiology, Photosynthesis, Hot springs, Phototropism, Yellowstone National Park, Precambrian Era

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Composition and metabolic activities of bacterial biofilms colonizing food residues in the human gut

Article Abstract:

The composition and metabolic activities of bacterial communities that colonize the surface of food residues in the gut human, with respect to their role in the breakdown of complex carbohydrates are investigated. The results suggest that these biofilm microbiotas are heterogeneous assemblages that must form rapidly due to the relatively short retention time of digestive materials in the cecum and ascending colon, which act as a mixing chamber in the large bowel.

Carbohydrate metabolism

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Development of a monoclonal antibody-based immunoassay for the detection and quantification of Anguillospora longissima colonizing leaf material

Article Abstract:

The mycelium of Anguillospora longissima grown on the decomposing leaf material is diagnosed both in vitro and in vivo by immunofluorescence, enzyme-linked immunosorbent assay and immunoenzymatic staining processes using the monoclonal antibody AL-HH8c. At any age and culture conditions of the mycelial, the AL-HH8c identifying antigens are obtained.

Observations, Monoclonal antibodies, Immunoassay

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