| ecophysiology and geochemistry of microbial arsenic oxidation within a high arsenic, circumneutral hot spring system of the alvord desert. | microbial metabolism of arsenic has gained considerable interest, due to the potential of microorganisms to drive arsenic cycling and significantly influence the geochemistry of naturally arsenic-rich or anthropogenically arsenic-polluted environments. alvord hot spring in southeastern oregon is a circumneutral hot spring with an average arsenic concentration of 4.5 mg l(-1) (60 microm). hydrogeochemical analyses indicated significant arsenite oxidation, increased ph and decreased temperature al ... | 2008 | 18318711 |
| molecular and kinetic characterization of mixed cultures degrading natural and synthetic estrogens. | the biodegradation of estradiol (e2), estrone (e1), and ethinylestradiol (ee2) was investigated using mixed bacterial cultures enriched from activated sludge. enrichments were carried out on e2 or ee2 in batch conditions with acetonitrile as additional carbon source. degradation experiments were performed both using hormones as sole carbon source or with an additional source. the hormones were completely degraded by these cultures. estradiol was rapidly converted to e1 within 24 h. thereafter, e ... | 2010 | 19685239 |
| molecular analysis of bacterial communities in uranium ores and surrounding soils from banduhurang open cast uranium mine, india: a comparative study. | bacterial community structure of heavy metal rich- uranium ores and surrounding soils was explored using 16s rrna gene based clone library analysis and denaturing gradient gel electrophoresis (dgge) to provide baseline microbial diversity data on autochthonous communities. sequence analysis of major ribotypes and/or dgge bands revealed proteobacteria and acidobacteria as the two most frequently present bacterial phyla across the samples, although relative abundance of each phyla and identity of ... | 2011 | 21308598 |
| analysis of the microbial community of the biocathode of a hydrogen-producing microbial electrolysis cell. | the microbial electrolysis cell (mec) is a promising system for hydrogen production. still, expensive catalysts such as platinum are needed for efficient hydrogen evolution at the cathode. recently, the possibility to use a biocathode as an alternative for platinum was shown. the microorganisms involved in hydrogen evolution in such systems are not yet identified. we analyzed the microbial community of a mixed culture biocathode that was enriched in an mec bioanode. this biocathode produced 1.1 ... | 2011 | 21983651 |
| comparative geochemical and microbiological characterization of two thermal pools in the uzon caldera, kamchatka, russia. | arkashin schurf (arkashin) and zavarzin spring (zavarzin), two active thermal pools in the uzon caldera, kamchatka, russia, were studied for geochemical and microbiological characterization. arkashin, the smaller of the two pools, had broader temperature and ph ranges, and the sediments had higher concentrations of total as (4,250 mg/kg) relative to zavarzin (48.9 mg/kg). glycerol dialkyl glycerol tetraether profiles represented distinct archaeal communities in each pool and agreed well with pre ... | 2011 | 22124570 |
| genomic content of uncultured bacteroidetes from contrasting oceanic provinces in the north atlantic ocean. | bacteroidetes are widespread in marine systems where they play a crucial role in organic matter degradation. whole genome analysis of several strains has revealed a broad glycolytic and proteolytic potential. in this study, we used a targeted metagenomic approach to investigate the degradation capabilities of distinct bacteroidetes clades from two contrasting regions of the north atlantic ocean, the polar biome (bplr) and the north atlantic subtropical (nast). we present here the analysis of 76 ... | 2011 | 21895912 |