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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 15 of 15 for “"aggregate sizes"”.
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Red Blood Cell Aggregation Characterization: Quantification and Modeling Implications of Red Blood Cell Aggregation at Low Shear Rates
… ability to deform and bridge together to form aggregates under very low shear rates. The theory and mechanics behind aggregation are, however, not yet completely understood. The purpose of this work is to provide a novel method to analyze, understand and mimic blood behaviour in …
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Precipitation, Aggregation, and Settling of Asphaltenes from n-Alkane Diluted Bitumens
… fractal dimension, and settling rates of the aggregates were also measured. Asphaltene aggregates were found to be fused fractal structures that are insensitive to shear once formed. A semi-empirical correlation for their fractal dimension was proposed. Asphaltene precipitation in a nitrogen …
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Effect of soil structure on temporal and spatial dynamics of bacteria
… repacked microcosms, the effect of bulk-density, aggregate sizes and water content on growth and distribution of introduced <i>Pseudomonas fluorescens</i> and <i>Bacillus subtilis</i> bacteria was determined. Soil bulk-density and aggregate sizes were altered to manipulate the characteristics of …
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Corn root growth and distribution as influenced by soil physical properties
… experiments where corn was grown in a range of aggregate sizes, bulk densities, low and high soil moisture levels, and temperatures. Rooting patterns in the field were altered by drought. Root length density decreased in the dry surface soil and proliferated in the moist subsurface soil. …
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Soil Organic Carbon Sequestration Potential by Perennial Biomass Crops in Southern Ontario, Canada
… SG, Mis, Ag fields and WLs across different soil aggregate sizes at ten sites. Soil aggregates were categorized into macroaggregates (2000-250 μm), microaggregates (250-53 μm) and silt plus clay fractions (<53 μm). Higher SOC and STN concentrations were found in macroaggregates and silt plus clay …
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Understanding aggregation of solvating extractants in applied separations
… NMR spectroscopy was used to determine the sizes and interactions of colloidal TBP aggregates in 20% TBP samples containing nitric acid, zirconium, and uranium. The aggregate sizes calculated from diffusion experiments were similar to those found previously using small angle neutron …
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Spectral and Spatial Heterogeneity in Molecular Assemblies of Amino Styryl Pyridinium Dyes
… displaying bands assigned to monomer and various aggregated (n-mer) species. Band assignment is based upon the interaction integral, which predicts the perturbation to the monomer excited state energy by interaction with neighboring molecules. This work is the first to identify a distribution of …
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Dynamic aggregation and dispersal of Escherichia coli under cycles of feast and famine
… a dynamic equilibrium between planktonic and aggregated microbial populations in liquid environments. Although models of population dynamics cannot be adequately designed or tested in the absence of precise quantitative data, experiments quantitatively documenting the dynamics of large …
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Investigating in vitro Alpha-Synuclein Aggregation of Parkinson's Disease
… The primary component of Lewy pathology is aggregated α-synuclein (α-syn), particularly involving phosphorylated forms at Serine 129. In familial PD cases, mutations in the SNCA gene encoding α-syn are involved. Despite being recognised as a key neuropathological characteristic, the role of …
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Experiments on the Transformation of Mud Flocs in Turbulent Suspensions
… dissertation aims to better understand how floc aggregate characteristics and behaviors are modified under different local conditions and how such alterations impact the floc settling velocity, which is one of the most crucial parameters influencing sediment transport modeling. A series of …
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The Preparation, Functionalization and Biomedical Applications of Carbonaceous Nanomaterials
… decreased, which is attributed to the increasing aggregate size. The aggregate sizes were confirmed by dynamic light scattering. In vivo study suggested that Gd3N@C₈₀[DiPEG(OH)x] was a good candidate for magnetic resonance imaging (MRI) contrast agents. Another facile method was also developed to …
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Root responses to soil physical conditions and the role of root-particle contact
… and shoot elongation in relation to particle/aggregate size and bulk density at various matric potentials is discussed.<br/><br/>Root and shoot elongation o f maize and lupin in soil and vermiculite at matric potentials ranging from -0.03 MPa to -1.6 MPa were investigated. Both root and shoot …
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Self-assembly behavior in hydrophilic block copolymers
… the basis of their self-assembly behavior: aggregate sizes, morphologies and stability can be explained from the absolute and relative block lengths, the nature of the blocks, the architecture and also solvent selectiveness. In water, self-assembly of amphiphilic block copolymers is assumed …
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Relating concrete cube, core and cylinder compressive strengths that are cast, cured, prepared and tested in laboratory conditions
… strengths (30 and 50 MPa), three maximum aggregate sizes (9.2, 19.2 and 26.5 mm) and two aggregate types, namely greywacke and quartzitic sandstone. An additional two mixes of high strength concrete were created (60 and 75 MPa) using 19.2mm greywacke aggregate. The compressive tests …
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Evaluating the Sensitivity of the Auckland Pavement Polishing Device and Analysis of Aggregate Microtextural Wear
… by vehicle tyres, reducing the micro-texture of aggregates and macro-texture of the road surface, resulting in a deterioration of skid resistance. Consequently, it is necessary to be able to accurately predict the skid resistance performance of aggregate as part of the design process. Laboratory …