Global ETD Search
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Showing 1 to 20 of 50 for “"AOB"”.
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Development of High Efficiency Partial Nitrification as a First Step of Nitrite Shunt Process using Ammonium-Oxidizing Bacteria (AOB)
Shortcut biological nitrogen removal is a non-conventional way of removing nitrogen from wastewater using two processes either nitrite shunt or deammonification. In this research, a complete partial nitrification as a first step of the Nitrite Shunt process has been developed under a high nitrogen …
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Investigation of Factors Influencing Niche Differentiation of Ammonia-oxidizing Archaea and Bacteria in Freshwater Environments
… ammonia-oxidizing archaea (AOA) and bacteria (AOB). Here we present a study using cultivation techniques to investigate environmental factors that influence the niche differentiation of AOA and AOB from freshwater environments. In order to investigate factors that drive the diversity of …
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Microbial diversity and activity in temperate forest and grassland ecosystems
… aimed at studying ammonia oxidizing bacteria (AOB) community structure and richness as an integrated part of soil functioning. This research aimed at investigating the effect of aboveground plant diversity on ammonia oxidizing bacteria diversity and function in forest and grassland soils with …
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Micropollutants biotransformation by two nitrifying communities enriched from biofilm of a nitrification trickling tower
… hypothesized that ammonia-oxidizing bacteria (AOB) were responsible for micropollutants biotransformation, which contributes to the removal of micropollutants. Both inhibition studies and pure culture studies have been performed to test this hypothesis. By inhibiting ammonia oxidation in …
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Elucidating the Reactivity of Cytochrome P460: Maturation, Product Selectivity, and Substrate Scope
Ammonia oxidizing bacteria (AOB) have evolved a nitrogen-based metabolism in which they rely solely on the oxidation of ammonia as their energy for life. In contrast to carbon-based metabolisms, there is a large gap in our knowledge of nitrogen-based metabolisms. The primary energy producing step …
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Environmental controls on the abundance, diversity, growth, and activity of ammonia-oxidizing microorganisms in temperate forest soils
… of ammonia-oxidizing archaea (AOA) and bacteria (AOB) at several sites within Coweeta. I found that AOA and AOB diversity were a function of both resource availability (i.e. N availability) and environmental harshness (i.e. soil pH) in line with general ecological theory developed for plant …
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Ammonia-monooxygenase-mediated cometabolic biotransformation and abiotic transformation of micropollutants
… roles played by ammonia-oxidizing bacteria (AOB), and nitrite-oxidizing bacteria (NOB) that grow dependently on AOB, we investigated the biotransformation capabilities of an NOB pure culture (Nitrobacter sp.), and an AOB (Nitrosomonas europaea)/NOB co-culture for fifteen MPs, whose …
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Investigating Experience-Dependent Plasticity in the Accessory Olfactory Bulb
… encounters, the accessory olfactory bulb (AOB) experiences changes in the balance of excitation and inhibition at reciprocal synapses between mitral cells (MCs) and local interneurons. The mechanisms underlying these changes remain controversial. Moreover, it remains unclear whether …
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Impacts de l’augmentation de la concentration en CO2 atmosphérique sur la composition de la communauté microbienne en bactéries oxydant l’ammoniac du sol.
… du sol en bactéries oxydant l’ammoniac (AOB) sous concentration en dioxyde de carbone ambiante ou élevée afin de vérifier si l’augmentation de la concentration en CO2 affecte la communauté de bactéries oxydant l’ammoniac. Ce mémoire s’intègre dans l’étude de l’effet d’une concentration en …
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Evaluation Of Nitrification Kinetics For A 2.0 MGD IFAS Process Demonstration
… (Regmi, 2008), ammonia oxidizing bacteria (AOB) and nitrite oxidizing bacteria (NOB) activity also shifted from the fixed film to the suspended phase as water temperatures increased and vice versa as the temperature decreased. The data suggest that AOB activity occurs on the surface of the …
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Evaluation of the immobilized soil bioreactor for treatment of naphthenic acids in oil sands process waters
… of ammonium and ammonium oxidizing bacteria (AOB) in NA removal. ISBRs have been used to successfully remediate water contaminated with pollutants such as pentachlorophenol and petroleum hydrocarbons. A system of two ISBRs was operated continuously for over 2 years with OSPW as the sole source …
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Age of information for broadcast and collection in spatially distributed wireless networks
… and collection, we define the Age of Broadcast (AoB) to be the amount of time elapsed until all nodes receive a fresh update, and the Age of Collection (AoC) as the amount of time that elapses until the base station receives an update from all nodes. We quantify the average broadcast and …
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Characterizing Kinetic Shifts in Nitrifying, Denitrifying, and Phosphorus Removing Biomass Adapting to Low DO
… able to estimate the ammonia oxidizing bacteria (AOB) oxygen half-saturation coefficient, ammonia maximum removal rate, denitrifier oxygen inhibition coefficient, total inorganic nitrogen (TIN) maximum removal rate, PAO oxygen half-saturation coefficient, phosphorus maximum uptake rate, and a …
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Elucidating Factors that Impact the Removal of Organic Microconstituents by Ammonia Oxidizing and Heterotrophic Bacteria
… biomass samples (ammonia oxidizing bacteria (AOB), laboratory enriched heterotrophic cultures free of active nitrifiers with low (Ox⁻) or high (Ox⁺) oxygenase activity, and a nitrifying activated sludge (NAS) from a full-scale wastewater treatment plant) to determine whether partitioning …
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Treatment Outcomes and Stability in Extraction vs. Non-Extraction Adult Anterior Open Bite Patients
Introduction: Anterior open bite (AOB) correction is difficult to achieve and more difficult to maintain. Some orthodontists utilize extractions to assist in bite closure. This study aims to explore whether extractions in adult patients with AOB lead to improved treatment outcomes and better …
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Investigation of Accessory Olfactory Interneuron Physiology and Function After Experience-Dependent Plasticity
… in the AOS, the accessory olfactory bulb (AOB), exhibits cellular and network plasticity in male and female mice after social experience. In the AOB, interneurons called internal granule cells (IGCs) express the plasticity-associated immediate-early gene Arc following intermale aggression …
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Development of Kinetic Parameterization Methods for Nitrifying Bacteria using Respirometry
… for both ammonia oxidizing bacteria (AOB) and nitrite oxidizing bacteria (NOB) without the use of selective inhibitors. By eliminating the use of inhibitory substances, representative biomass characteristics were maintained throughout the tests. The developed method, called the …
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Zeolite Incorporated Materials for Targeted Biomass Retention and Pollutant Removal
… did not retain aerobic oxidizing bacteria (AOB) on the carriers themselves. In both anaerobic and aerobic conditions, AOB were preferentially retained in the liquid of the reactors containing zeolite-coated carriers. Unexpectedly, denitrifying genes (specifically nirS, nirK, and nosZ) were …
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Orthodontic Treatment of Anterior Open-bite With and Without Skeletal Anchorage
… may offer in treatment of anterior open bite (AOB), there remains a lack of studies comparing outcomes and stability in patients treated with and without skeletal anchorage in growing versus non-growing individuals. The purpose of this study is to compare outcomes of AOB treatment with fixed …
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Perennial energy crops on riparian buffers affect nitrogen cycling microbial communities
… enzyme groups. The abundance of bacterial amoA (AOB) increased as N fertilization increased, thereby increasing the proportion of AOB compared to archaeal amoA (AOA). The nitrite reductase genes, nrfA and nirS, were more abundant in the plots with 56 kg N ha-1 applied; however, the nirK nitrite …
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