240
240
Jul 21, 2010
07/10
by
Guerrero, R.; Brune, D.; Poplawski, R.; Schmidt, T. M
texts
eye 240
favorite 0
comment 0
Phototrophic sulfur bacteria taken from different habitate (Alum Rock State Park, Palo Alto salt marsh, and Big Soda Lake) were grown on selective media, characterized by morphological and pigment analysis, and compared with bacteria maintained in pure culture. A study was made of the anaerobic reduction of intracellular sulfur globules by a phototrophic sulfur bacterium (Chromatium vinosum) and a filamentous aerobic sulfur bacterium (Beggiatoa alba). Buoyant densities of different bacteria...
Topics: BRINES, GEOCHEMISTRY, MICROORGANISMS, SALINITY, SALT BEDS, EVAPORATION, MICROBIOLOGY, PLANKTON, SEA...
347
347
Jul 21, 2010
07/10
by
Schmidt, T. M
texts
eye 347
favorite 0
comment 0
Reggiatoa and Thiothrix are genera of filamentous, colorless, sulfide oxidizing bacteria. These organisms are microaerophilic, oxidizing sulfide to sulfur in the presence of oxygen. The sulfur accumulates in intracellular sulfur globules - the outstanding morphological feature of these bacteria. Some strains are able to further oxidize the sulfur to sulfate aerobically or reduce the sulfur to sulfide anaerobically. This metabolic versatility makes these bacteria important links in aquatic...
Topics: MARINE ENVIRONMENTS, SEDIMENTS, SULFIDES, AQUEOUS SOLUTIONS, PH, REACTION KINETICS
564
564
Jul 21, 2010
07/10
by
Schmidt, T. M
texts
eye 564
favorite 0
comment 0
The effect of sulfur globules on the buoyant density of Chromatium vinosum and Beggiatoa alba was examined. The potential use of sulfur as a terminal electron acceptor in the anaerobic metabolism of Beggiatoa alba is also examined. The effect of the reduction of intracellular sulfur was investigated during dark metabolism on the buoyant density of C. vinosum. It is hypothesized from the results that the sulfur reduction to sulfide is part of an anaerobic energy operating system. Carbon stored...
Topics: EUTROPHICATION, FRESH WATER, LAKES, SEDIMENTS, SULFUR, ORGANIC COMPOUNDS, REDUCTION (CHEMISTRY)