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 10 of 10 for “"Nutrient diffusion."”.
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A first approach to individual-based modeling of the bacterial conjugation dynamics
… individual represent metabolic processes such as nutrient uptake, growth, reproduction and conjugation of each bacterial cell in the colony. It also takes into account also non-metabolic processes such as nutrient diffusion.
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Engineering of tools for De Novo Assembly of Human Cells
… complexity of these structures are limited by nutrient diffusion and the morphology cannot be controlled. An ideal system would allow for high spatial control while retaining native cell-cell interactions formed through developmental progression.
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A novel bioengineering platform using functionalized self-assembly peptides to enhance CYP3A2 activity in modified rat hepatocyte sandwich cultures
… peptide scaffold. To facilitate oxygen and nutrient diffusion and exchange, plasma modification technology is employed to control peptide layer dimension. We have successfully shown that plasma engineering can be used to optimize peptide thickness.
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A mathematical model of the nitrogen cycle in a constructed wetland
… boundaries, and a jump condition is modeled for nutrient diffusion through the sediment-water interface. A hyperbolic advection-settling equation models the transport and deposition of sediment-bound organic nitrogen; mineralization of deposited nitrogen is modeled. A parabolic …
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Sea-based Integrated Multi-Trophic Aquaculture: Investigation of a fish, bivalve and macroalgal co-culture system.
… cultures, was only observable when ambient nutrients were limiting or favoured food, i.e. phytoplankton, was scarce. Localised differences within and between sealoch systems were also observed to be of importance.<br/>The complex physical processes of particulate waste dispersion and …
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Protein regulation in Trichodesmium and other marine bacteria: observational and interpretive biomarkers of biogeochemical processes
… mediating chemical transformations and linking nutrient cycles to one another. A major goal in oceanography is to predict the activity of marine microbes across disparate ocean ecosystems. Towards this end, molecular biomarkers are important tools in chemical oceanography because they allow for …
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A 3D synthetic extracellular matrix that can be dissolved to interrogate the cellular local microenvironment on demand
… tissue models exceeding 100 gm due to nutrient diffusion limitations. Here we define microenvironment conditions that are permisive of the formation of 3D interconnected structures of iPSC endothelial cells in PEG hydrogels. Lastly, we adapted the synthetic hydrogels to enable local …
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STUDIES OF CELL MOTILITY AND DIFFERENTIATION IN COMPLEX 3D IN VITRO MICROENVIRONMENT
… due to the fact that low oxygen and limited nutrient diffusion can cause cell death. However, low oxygen tension during culture could be beneficial for cartilage tissue engineering, as cartilage is an avascular tissue and low oxygen is present in vivo during chondrogenesis and in adult …
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Mathematical Modeling of Cancer Tumor Evolution
… in water; they wander randomly, divide when nutrients are available, and die naturally. Every field (cancer cells, dead matter, nutrients) simply spreads out from where it is released and smooths itself over time. This is the picture you get if cells have no “intentional” motility—only …
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Understanding key factors influencing habitat quality for the endangered fountain darter (Etheostoma fonticola) in the Comal River.
… in Landa Lake: water column, sediment, and plant nutrient analyses, an herbivory and soil fertility experiment, and a spatial study of diel dissolved oxygen dynamics. Nutrient data were collected via water samples, nutrient diffusing substrata (NDS), sediment cores, and plant samples. The water …