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 38 for “"organic substrate"”.
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Response of indigenous heterotrophic groundwater bacteria to low organic substrate availability
… and may rely on dissolved low molecular weight organic substrates in dilute solution for their nutrition. Periods of metabolic dormancy may occur when natural substrate concentrations drop below the level required to sustain vegetative cell function. In these studies total cells present were …
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Optimizing high-rate activated sludge: organic substrate for biological nitrogen removal and energy recovery
… and assimilation of readily biodegradable substrate (SS), this study evaluated a respirometric method to estimate the SS and active heterotrophic biomass (XH) fractions of the raw wastewater influent and effluent of an A-stage pilot process. The influent SS values were comparable to the SS …
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Identification of Host Fish and Experimental Culture of Juveniles for Selected Freshwater Mussel Species in Virginia
… the influence of high (4.1%) and low (2.5 %) organic content in substrate, and high (250 mg/L CaCO₃) and low (50 mg/L CaCO₃) water hardness levels were assessed on growth and survival. After 15 wk, juveniles in the high water hardness treatment exhibited significantly greater survival and …
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Physiological studies of phototrophy and heterotrophy in two algae with contrasting nutritional characteristics, Pyrenomonas salina (Cryptophyceae) and Poterioochromonas malhamensis (Chrysophyceae)
The ability of algae to take up dissolved organic compounds is well documented for cultured and field populations yet the physiological mechanisms controlling this behavior are largely unknown. The effects of dissolved organic compound additions on the growth and photosynthetic apparatus were …
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An investigation of substrate removal and storage in the activated sludge process
… concentration of microorganisms would have on substrate removal, microbial substrate storage, and oxygen utilization at a constant food-to-microorganism ratio. Batch experiments were conducted, under aerated and completely mixed conditions, using a domestic wastewater, a paper mill wastewater, …
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The Utilization of Metalloporphyrins as Mechanistic Probes of the Active Site of Heme Proteins
… the insertion of an oxygen atom into an organic substrate, and also serves as the binding site for dioxygen in O$\sb2$ transport/storage hemoproteins. In the latter, one observes a range of 10$\sp5$ in O$\sb2$ affinities among heme proteins, discrimination in binding O$\sb2$ vs. CO, and …
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Quantifying the effects of fertilizer type, source, and concentration on the post-production growth of containerized culinary herbs
… cm-diameter containers filled with certified organic substrate and irrigated with solutions containing 100, 200, or 300 mg∙L–1 N from a conventional or organic water-soluble fertilizer (WSF); or were transplanted into the same organic substrate amended with 0.25, 0.5 or 0.75 kg N∙m –3 from …
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Design optimization of broadband rape-based reflectary antena elements for x-band applications
… reflectarray antenna elements embedded on organic substrate materials. It addresses the key limitations of microstrip reflectarray antenna technology i.e., narrow bandwidth and high loss performance. It presents a novel dual resonance element with wide phase range and broadband frequency …
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Anomalous Wave Dispersion in the Cyclohexanedione-Bromate Chemical Oscillator
… bromate oscillators) for the oxidation of organic substrate to provide the new dynamics.
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Anomalous Wave Dispersion in the Cyclohexanedione-Bromate Chemical Oscillator
… bromate oscillators) for the oxidation of organic substrate to provide the new dynamics.
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The effect of pH and dissolved organic carbon on the growth kinetics of Ac. cupricumulans JTC3 and L. ferriphilum HT pertinent to the BIOX® process
… and temperature, and the presence of dissolved organic carbon on the growth and ferrous iron oxidation kinetics of these two microorganisms were investigated as potential driving forces behind the compositional shift in the BIOX® consortia. Biokinetic performance of L. ferriphilum HT-dominant …
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Engineering of Microbial Fuel Cells technology: Materials, Modelling and Architecture
… able to convert chemical energy, contained in organic substrate, in electrical energy, thanks to the metabolic activity of microorganisms. Firstly, a fluid-dynamic modelling of different Microbial Fuel Cell configurations to study trajectories and concentration profile of the liquid containing …
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Nonlinear dynamics of acid- and base-regulated chemical systems
… in chapter 4, is used to design the first organic substrate based, non-redox, pH oscillating reaction, the methylene glycolsulfite-gluconolactone system. In an open reactor this reaction displays large amplitude oscillations in pH which are well modelled with a proposed mechanism. In …
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Coupling Metaproteomics with Taxonomy to Determine Responses of Bacterioplankton to Organic Perturbations in the Western Arctic Ocean
… Chukchi Sea after rapid fluctuations in algal organic matter availability. Novel bioinformatics tools were collaboratively developed and used together with community proteomics (metaproteomics) to characterize and quantify changes in bacterial community functioning and taxonomic composition …
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Expanding the chemistry of a cupredoxin by designing nonnative active sites and using abiological metals
… (pMMO), catalyze the hydroxylation of organic substrate using a copper cofactor and a small molecule oxidant, such as dioxygen or hydrogen peroxide. In contrast with iron-dependent monooxygenases, copper monooxygenases such as LPMO and pMMO are not as well characterized and there is …
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Microbial production and consumption of marine dissolved organic matter
… are the principal producers of oceanic dissolved organic matter (DOM), the organic substrate responsible for secondary production by heterotrophic microbes in the sea. Despite the importance of DOM in marine food webs, details regarding how marine microbes cycle DOM are limited, and few definitive …
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Degradation of Chlorophenols in Swine Waste
… in which electrons are transferred from one organic substrate to another and which results in incomplete degradation of organic compounds. Anaerobic respiration is a process in which organic substrates are degraded completely to CO2, but using substances other than oxygen as the terminal …
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Benthic invertebrate management in plastic-lined fish culture ponds
… lining significantly reduces the amount of organic sediment typically found on the bottom of culture ponds there is also a limited amount of organic substrate available to potential benthic macroinvertebrates, which are important prey for larval fish. Previous studies on plastic-lined ponds …
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Carbon nitride for solar H2 production coupled to organic chemical transformations
… a closed redox system. In the presence of an organic substrate and absence of a proton reduction catalyst, photoexcited CNx was found to accumulate long-lived “trapped-electrons”, which enables decoupling oxidation and reduction reactions temporarily and spatially. This allows solar H2 …
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