Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 22 for “"Alphaproteobacteria"”.
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Electron cryomicroscopy structures of respiratory supercomplexes from alphaproteobacteria suggest mechanisms to enhance catalysis and to prevent deactivation of respiratory complex I
… origins of eukaryotic supercomplexes. The alphaproteobacterial supercomplex may also suggest a mechanism to enhance catalysis between CI and CIII by providing structural scaffolds to increases the concentration of hydrophobic substrate ubiquinone-10 between the reaction centres. A physical …
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Bakterieller Abbau von refraktärem organischem Material im Weserästuar und in der Nordsee
… Phylogenetische Analysen zeigten, dass Alphaproteobacteria, insbesondere Vertreter der Roseobacter-Gruppe, in Inkubationsansätze mit marinen Bakterien dominierten. Durchflusskulturen mit ästuarinen Bakteriengemeinschaften zeigten eine Dominanz der Gammproteobacteria und Actinobacteria. …
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Rhizosphere Bacteria and Phytostabilization Success: The Association Between Bacteria, Plant Establishment and Metal(loid) Immobilization in Metalliferous Mine Tailings
… association with the relative abundance of Alphaproteobacteria and Gammaproteobacteria on the rhizoplane. In relation to microbe-metal interactions on the root surface, results showed that Actinobacteria and Alphaproteobacteria colocalized with Fe-plaque and arsenic (As) contaminant on the …
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Detection and Capture of Nitrogen Fixing Bacteria From Soil and Roots Using Plant Specific Lectins
… other nutrient cyclers such as: Actinobacteria, Alphaproteobacteria, Bacilli, Betaproteobacteria, Chloroflexia, Cytophagia, Deltaproteobacteria, Gammapoteobacteria, and Sphingobacteriia.</p>
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Environmental controls on the distribution of bacterial membrane lipids
… occurrence may be confined to cyanobacteria and alphaproteobacteria. Similarly, a stereoisomer of bacteriohopanetetrol (BHT), BHT II, has been identified exclusively in anaerobic ammonium oxidation (anammox) bacteria. However, the interpretation of sedimentary hopanoids is presently limited by an …
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Microbial Evolution In Sea Ice: Communities To Genes
… in the ice, with communities dominated by SAR11 Alphaproteobacteria (Bacteria) and Marine Group I Crenarchaeota (Archaea) found essentially unchanged throughout the winter. These results informed further hypotheses on the potential for increased lateral gene transfer by conjugation, transduction, …
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Bacterial Assemblages And Microbial Enzyme Activity In The Major Tributaries Of The Lower Mississippi River
… as being related to the dominant marine alphaproteobacteria pelagibacter/sar11 and was found in all rivers. The most abundant bacterial phylum was the cyanobacteria, of which a number of genetically distinct otus were identified as being similar to prochlorococcus. Community structure was …
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Characterizing the AbcR/VtlR system in the Rhizobiales
… extends to bacteria in other orders within the Alphaproteobacteria. The AbcR sRNAs are an example of sibling sRNAs, where two copies of the abcR gene are typically present in the genome. The AbcRs are involved in the negative regulation of ABC-type transport systems, which are important …
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Plastics and Microplastics as Vectors for Bacteria and Human Pathogens
… being <em>Bacteroidetes</em> (28%) and <em>Alphaproteobacteria</em> (20%). Colonization rates and community structure varied temporally and among substrate types, suggesting that numerous factors should be considered when characterizing microbial communities on plastic. This is the first …
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Influence of vegetation on sediment bacterial community structure, microbial enzyme activities and phosphorus retention in constructed freshwater wetlands
… sequences affiliated with the Firmicutes and Alphaproteobacteria were recovered from unvegetated sediments. Mesocosms were later dosed in August 2007 with 2.5mg/L of phosphorus to study the influence of vegetation on microbial enzyme activities in phosphorus-loaded wetlands. Sediment samples …
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Identification of fungi and bacteria associated with internally discolored horseradish roots
… into five classes, Actinobacteria (50 roots), Alphaproteobacteria (10 roots), Bacilli (234 roots), Betaproteobacteria (4 roots), and Gammaproteobacteria (287 roots). The majority of the isolates were identified as Bacillus and Pseudomonas, which were isolated from 185 and 204 roots, …
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Microbial biodiversity in the southern Indian Ocean and Southern Ocean
… confirmed the dominance of Cyanobacteria, Alphaproteobacteria and Gammaproteobacteria in the pelagic prokaryotic microbiome, while the Stramenopiles-Alveolata-Rhizaria (SAR) cluster dominates the eukaryotic microbiome. A decrease in the SAR community will be reported for the Southern Ocean …
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Investigation of bacterial community composition and abundance in a lowland arable catchment
… (OTU14), Actinobacteria (OTUs 20, 21 and 25) and Alphaproteobacteria (OTU26). Most of the downstream bacterial OTUs showed a positive relationship with TP and the presence of urban areas. The results of this research, however, do not provide strong evidence that competition is an important process …
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The effects of Fe(III) reduction on biodegradation of fuel oxygenates and chlorinated ethenes
… associated with organisms belonging to the Alphaproteobacteria. The results provide the original evidence of the stimulative effect of Fe(III) reduction on anaerobic TBA mineralization, and give initial insight to the organisms that may catalyze the anaerobic TBA mineralization reactions. …
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Methanoloxidation in oxischen Böden und Umweltparameter assoziierter methylotropher Mikroorganismen-Gemeinschaften
… stimuliert wurden, konnten den Alphaproteobacteria zugeordnet werden. Die Isolierung von 129 Reinkulturen auf Medium mit Methanol und die Analyse von Genmarkern des methylotrophen Stoffwechsels (mxaF, mch, fae) zeigten ferner, dass Alphaprotebacteria in der untersuchten …
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A path to biodiscovery: isolating Antarctic ascidian-associated bacteria and screening genomes for secondary metabolite-encoded biosynthetic gene clusters and signatures of cold adaptation
… bacterial classes Gammaproteobacteria and Alphaproteobacteria from the Synoicum adareanum microbiome, to now include Bacilli, Acidimicrobiia, Actinobacteria and Bacteroidia. Through sequencing representative genomes of 22 isolates, 135 biosynthetic gene cluster types across eight compound …
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Bacterioplankton dynamics in surface waters of the north-eastern (sub-)tropical Atlantic Ocean affected by Aeolian dust
… with domination by the ubiquitous SAR11 clade of Alphaproteobacteria, whereas key<br/>primary producers, Prochlorococcus cyanobacteria, numerically dominated during calmer<br/>conditions. Phytoplankton-associated Bacteroidetes and Synechococcus cyanobacteria were most<br/>abundant during turbulent …
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Understanding how microbial community contributes to wastewater treatment performance in constructed wetlands within Scotch whisky distilleries
… between CWs, with Gammaproteobacteria, Alphaproteobacteria, and Bacteroidia being the predominant classes. On the other hand, mRcrobRal dRversRty wRthRn each sRte exhRbRted neglRgRble or low level varRatRon across seasons at the class and order levels.<br/>Further investigation into …
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Characterization of the VtlR regulons in Brucella abortus and Agrobacterium tumefaciens
… similar and are found within the same Class, Alphaproteobacteria, and Order, Rhizobiales, of the domain Eubacteria; however, they survive and replicate in vastly different environmental niches. In Order to adapt to different environments, bacteria utilize several mechanisms of gene regulation …
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Characterization of an agrobacterial plasmid inducible for transfer by mannopine and evolution of the core replication and transfer functions of repabc plasmids with class i quorum-sensing and transfer systems
repABC plasmids are ubiquitous in the α-proteobacteria and are important to the biology of the bacteria that harbor them for several reasons. First, they can carry large amounts of DNA, thereby conferring a wide variety of important characteristics. Some of these traits are important for the …
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