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 25 for “"carbon flow"”.
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Carbon flow and food web structure in the mesopelagic zone of the North Atlantic Ocean
… the deep ocean through food web interactions and carbon flow pathways. In this dissertation, I use carbon compound-specific stable carbon isotope analysis of amino acids (CSIA-AA) and DNA gut metabarcoding methodologies to provide a broad ecological outlook on mesopelagic carbon flow coupled with …
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Interaction between respiratory carbon flow and photosynthetic light harvesting in the green alga, selenastrum minutum
… it was proposed that changes in respiratory carbon flow would affect the ratio of reduced/oxidized pyridine nucleotides and affect reduction of the PQ(cyt b6f) pool via a thylakoid-bound NAD(P)H-PQ oxidoreductase. In turn, reduction of the PQ(cyt b6f) pool would result in a state 1 to 2 …
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Carbon flow and food web structure in the mesopelagic zone of the North Atlantic Ocean
… the deep ocean through food web interactions and carbon flow pathways. In this dissertation, I use carbon compound-specific stable carbon isotope analysis of amino acids (CSIA-AA) and DNA gut metabarcoding methodologies to provide a broad ecological outlook on mesopelagic carbon flow coupled with …
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Food webs in the lower Waikato River and the role of hydrogeomorphic complexity
… ecosystems. Quantifying the contributions of carbon sources that support food webs is an important and growing field of ecological research, with implications for future management and rehabilitation of large rivers. I reviewed theoretical concepts addressing carbon flow in large river food …
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Annual secondary production of fungal and bacterial decomposers associated with standing and benthic litter of the freshwater emergent macrophyte, <i>typha angustifolia </i>
… production investigations are lacking. Microbial carbon assimilation into biomass and CO<sub>2</sub> mineralization may contribute considerably to wetland biogeochemical cycling and energy flow. Naturally-occurring <em>Typha angustifolia</em> detritus was collected to determine annual areal carbon …
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Characterization of a transposon-induced pleiotropic metronidazole resistant mutant of Clostridium acetobutylicum P262
… which in turn regulates the direction of carbon flow in the cell. The aim of this research project was to isolate electron transport gene(s) from the solvent-producing Clostridium acetobutylicum strain P262, using transposon-induced metronidazole resistance as a selection system. In the …
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Visualizing models driven by real-time, sensor-based data : a new way to experience the inner workings of ecosystems
… kind to visualize models of molecular motion and carbon flow in 3D, within the context of the physical site, and driven by realtime data. Whether experienced remotely or integrated on site, EcoFlux can be used to inspire curiosity for visitors, enhance scientific understanding for researchers, and …
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Bacterial community composition in stream biofilms is influenced by algal response to varying light and phosphorus ratios
… observed. In aquatic systems, dissolved organic carbon derived by algae is an important resource for bacteria. Light and phosphorus availability are two factors that influence biomass and abundance of algae, and the changes will be reflected in the bacterial portion of the microbial community. …
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The role of glycogen Metabolism in the Adaptation to environmental Changes of the cyanobacterium Synechocystis sp. PCC 6803
… in cyanobacteria, serving as a critical carbon and energy reservoir to support cellular energy homeostasis. Its metabolism is conserved, requiring only a few steps from glucose-6P to incorporate glucose molecules into glycogen chains. This study investigates the role of key enzymes in …
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The determination of heat transfer characteristics for the improved design of a heat exchanger for a moving bed system composed of air and activated carbon
… passing counter currently to the gaseous flow. The gases are separated by selective adsorption. Of basic importance for successful operation is the heating of the adsorbent to obtain desorption. Considerable difficulty in achieving this transfer of heat is encountered because of the …
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Assessing the role of soil chemoautotrophs in carbon cycling: An investigation into isotopically labelled soil microorganisms
… atmospheric CO2 have created great interest in carbon capture technologies and natural sinks of this major component of the carbon cycle. Humic substances are a large, operationally defined fraction of soil organic matter. It was thought that humic substances consist of cross-linked …
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Carbon and electron flow via methanogenesis, So₄²⁻, NO₃⁻ and Fe³⁺ reduction in the anoxic hypolimnia of upper Mystic Lake
… Upper Mystic Lake. The equivalent electron and carbon flow of the reactions were also calculated to obtain a mass balance within the hypolimnia of UML. From the calculations, the approximate organic carbon decomposition rate, measured as CO₂ accumulation, was 7.54 mmol m⁻² d⁻¹. The amount of …
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ROLE OF CRC IN THE REGULATION OF ALGINATE IN PSEUDOMONAS AERUGINOSA
… that crc mutation, which has global effects on carbon flow in the cell, could be affecting metabolic pathways that feed precursors into the alginate biosynthetic pathway. Future directions for this research are discussed.
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A size-based model of carbon and nitrogen flows in plankton communities
… is developed to investigate the dynamics of carbon and nitrogen flows in plankton communities. All parameters in the model are determined by body size using empirically-determined relationships calculated from published data. The model is robust with respect to most parameters and …
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In vivo 13C stable isotope tracing of single leaf development in the cold
… metabolite pool sizes may stay constant while carbon flows are altered and vice versa. Hence, measuring the carbon allocation of metabolites enables a better understanding of the metabolic phenotype. The main challenge of such measurements is the in vivo integration of a stable or radioactive …
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An investigation of the growth and feeding responses of oligotrich ciliates to food types and concentrations : an approach to assessing the potential of marine planktonic ciliate blooms
… and can be important in the transfer of carbon through food webs. This study examined the impact of clonal ciliate populations on short term algal blooms. Numerical and functional responses (growth and grazing rates with varied food concentration)were established for 5 marine planktonic …
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Development of Steady-State and Dynamic Flux Models for Broad-Scope Microbial Metabolism Analysis
… flux analysis (MFA), can characterize carbon and energy flows through a cells metabolic network. By employing both 13C-labeling experiments and nonlinear programming, 13C-MFA provides a rigorous way of examining cell flux distributions in the central metabolism. FBA, on the other hand, …
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H to infinity optimal control of a counter-current process
… The process most commonly used today is that of carbon-in-pulp gold extraction (CIP). One of the main reasons for this is that it is the most economically efficient method of extracting gold from ore. The process uses activated carbon to absorb gold from a cyanide leach solution. Slurry …
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Computational modeling techniques for biological network productivity increases : optimization and rate-limiting reaction detection
… of the MRL model ensembles for the central carbon metabolic network, which generates most of the precursors for the secondary metabolite, were constructed. The E. coli version contains the basic reactions in this network and was applied to optimize the aromatic amino acid production which …
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Physiological Features of Saccharomyces cerevisiae and Alternative Wine Yeast Species in Relation to Alcohol Level Reduction in Wine
… points in the vine growing and winemaking workflow that can be targeted to reduce the alcohol content of the final wine. In this thesis I focused on the fermentation step, in which sugars are converted into ethanol by the activity of yeasts, mainly Saccharomyces cerevisiae. Previous work in …
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