| cultivation of a novel cold-adapted nitrite oxidizing betaproteobacterium from the siberian arctic. | permafrost-affected soils of the siberian arctic were investigated with regard to identification of nitrite oxidizing bacteria active at low temperature. analysis of the fatty acid profiles of enrichment cultures grown at 4 degrees c, 10 degrees c and 17 degrees c revealed a pattern that was different from that of known nitrite oxidizers but was similar to fatty acid profiles of betaproteobacteria. electron microscopy of two enrichment cultures grown at 10 degrees c showed prevalent cells with a ... | 2007 | 18062041 |
| life without light: microbial diversity and evidence of sulfur- and ammonium-based chemolithotrophy in movile cave. | microbial diversity in movile cave (romania) was studied using bacterial and archaeal 16s rrna gene sequence and functional gene analyses, including ribulose-1,5-bisphosphate carboxylase/oxygenase (rubisco), soxb (sulfate thioesterase/thiohydrolase) and amoa (ammonia monooxygenase). sulfur oxidizers from both gammaproteobacteria and betaproteobacteria were detected in 16s rrna, soxb and rubisco gene libraries. dna-based stable-isotope probing analyses using 13c-bicarbonate showed that thiobacill ... | 2009 | 19474813 |
| cultivation, growth physiology, and chemotaxonomy of nitrite-oxidizing bacteria. | lithoautotrophic nitrite-oxidizing bacteria (nob) are known as fastidious microorganisms, which are hard to maintain and not many groups are trained to keep them in culture. they convert nitrite stoichiometrically to nitrate and growth is slow due to the poor energy balance. nob are comprised of five genera, which are scattered among the phylogenetic tree. because nob proliferate in a broad range of environmental conditions (terrestrial, marine, acidic) and have diverse lifestyles (lithoautotrop ... | 2011 | 21185433 |
| cold temperature decreases bacterial species richness in nitrogen-removing bioreactors treating inorganic mine waters. | explosives used in mining, such as ammonium nitrate fuel oil (anfo), can cause eutrophication of the surrounding environment by leakage of ammonium and nitrate from undetonated material that is not properly treated. cold temperatures in mines affect nitrogen removal from water when such nutrients are treated with bioreactors in situ. in this study we identified bacteria in the bioreactors and studied the effect of temperature on the bacterial community. the bioreactors consisted of sequential ni ... | 2011 | 21769859 |