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 69 for “"Shell thickness"”.
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Effect of indomethacin (a prostaglandin inhibitor) on the ovulatory cycle, total plasma calcium, and egg shell thickness in the domestic laying hen (Gallus domesticus)
Thesis (M.S.)--Michigan State University. Dept. of Poultry Science,
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Comparison of broiler breeder production and fertility in a colony cage system with two different floors versus a slat-floor system
… conducted to compare egg production, egg weight, shell thickness, albumin height, fertility, and mortality of naturally mated broiler breeders maintained on either a slat and litter floor or in two tiered colony cages. In the first trial there was no difference (P > 0.05) in egg production between …
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Uniform biodegradable microparticle systems for protein delivery
… (BSA)-loaded PLG core and a drug-free PLA shell. Different PLG and PLA molecular weight and organic solvent combination to dissolve core and shell polymers (organic solvent configuration) were used to produce uniform DWMS with average size around 55 µm and ~10 µm shell thickness. By …
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Design and synthesis of microcapsules using microfluidics for autonomic self-healing in cementitious materials
… and maintenance actions. However, the size, shell thickness, shell material and mechanical properties of the capsules still need to be optimised to ensure self-healing performance. Thus, the objective of this research was to explore the controlled microfluidic encapsulation to investigate the …
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Thermal -Mechanical Model of Solidifying Steel Shell Behavior and Its Applications in High Speed Continuous Casting of Billets
… in high speed continuous casting: the minimum shell thickness to avoid breakouts, the maximum casting speed to avoid hot off-corner sub-surface cracks, and the optimal mold taper.
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Thermoelectric properties of polysilicon inverse opals
… that preserving a grain size smaller than the shell thickness of the inverse opal increases the gure of merit by as much as 50% when the ratio between the two features is a third. At 600 K, the figure of merit is as high as 0.6 for a shell thickness of 10 nm. We also measured the thermal …
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Interactive effects of pH, temperature and exposure period on native and invasive mussels from the West Coast of South Africa
… dioxide can impact marine calcifying organisms. Shells of marine calcifying organisms protect their internal soft tissue and may be key in determining the susceptibility of marine calcifiers to these environmental stressors. To test this, the effects of pH, temperature, exposure period and their …
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Effects of Atrazine on Penned Pheasants and the Occurrence of Stress Marks on Feathers
… treatments. Replicate A eggs were unaffected in shell thickness and pipping rates, while fertility and hatchability were statistically different. Replicate B eggs were unaffected in fertility, hatchability and shell thickness but indicated a significant difference in pipping rates. Hens receiving …
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Control of Micro- and Nano-Sphere Size Distributions: Implications in Drug Delivery
… uniform microcapsules exhibiting controlled shell thickness. The addition of a second concentric nozzle to our system allowed us to spray a dual polymer jet. Considering the interfacial tensions and spreading coefficients of the polymer components and non-solvent phase for the resulting …
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Acoustic biosensing using functionalised microbubbles
… resonant frequency is strongly dependent on the shell properties (thickness, elasticity, viscosity, $\textit{etc.}$), and it is affected by a layer of material attaching to its surface. Existing analytical models in the literature cannot predict the change in microbubble resonance when the …
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Biodiversity crisis and recovery during the Triassic-Jurassic greenhouse interval: testing ocean acidification hypotheses
… Triassic) extinction event is characterised by shelled species showing a reduction in size, and thickness, which together with changed mineralogy is thought to be as a result of increased atmospheric pCO2 levels. Similar morphological changes have been demonstrated for extant species exposed …
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Biodegradable, Liquid-Filled, Spherical Capsules With Pre-Determined Burst Times
… by the capsule core as a function of the capsule shell thickness, radius of the capsule, core osmotic pressure and the membrane tensile strength. Elastoplastic and failure characterization of PLGA was conducted as a function of hydration under uniaxial and biaxial stretch and by a novel “beach …
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Engineering the Plasmon Resonance of Gold Nanoshells for Biological Applications
… gold to silica colloids on the formation of nanoshell precursor seed particles thereby leading to the optimization of the process by which gold nanoshells are formed. With a focus on nanoshells for the thermal ablation of cancer cells, 104.5 nm core shell particles having a peak resonance at 940 …
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Templated growth of platinum nanostructures
… detail. Platinum hollow nanospheres with uniform shell thickness were prepared by the seeded growth of platinum on the surface of latex beads with an adsorbed porphyrin photocatalyst followed by core removal. Templating bicelles of a high yield were synthesized for the first time and verified by …
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Icy Satellite Tectonic, Geodynamic and Mass Wasting Surface Features: Constraints on Interior Processes and Evolution
… regions on Europa and what they reveal about ice shell thickness, iv) relaxed impact craters and the thermal history of Ganymede, and v) the size-velocity distribution of ejecta fragments from large cratering events on Europa and Ganymede.</p>
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Hydration-Induced Plasma Surface Modification of Aluminum Nanoparticles for Power Generation in Oxygen Deficient Environments
… is to modify the alumina (Al2O3) passivation shell surrounding the Al fuel core. One approach uses atmospheric plasma treatment to physically reduce the Al2O3 shell thickness while simultaneously exposing the defected surface to water vapor to promote surface hydration. Combining water-vapor …
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Exigência de treonina digestível para codornas japonesas em postura
… (g) and percentage (%) of yolk, albumen and shell, shell thickness (mm), Haugh units, specific gravity (g/cm3). It was determined that the threonine requirement for Japanese quails is 0.793% or 200 mg / bird / day, compared with 78% in constant respectively.
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Parametric study of stiffened steel containment shell structures
… stiffened steel cylindrical and conical shell frustum subjected to different load cases. This situation arises in different steel shell applications such as storage vessels (liquid, solid and gas) and in certain configurations of industrial process facilities. The stiffeners are flat …
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Optimization of thin-wall cylindrical shells with compliant cellular-solid cores
… the elastic buckling resistance of a cylindrical shell over that of a hollow cylinder of the same weight. In this thesis, we extend the linear-elastic buckling theory by coupling basic plasticity theory to provide a more comprehensive analysis of isotropic, cylindrical shells with compliant cores. …
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Toward spatial control of gold nanorod surface functionalization
… characterization methods. Imaging of GNR polymer shells indicated anisotropic composite structures, as confirmed by both conventional and cryo-TEM. Optical characterizations were performed using two-photon excited fluorescence and Z-scan techniques, to probe the TPA enhancement. The intrinsic …
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