Materials Literature
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This thesis considers a nanotechnology approach based on the production of metals pre-treatments and organic coatings (a complete protection system at all) designed from the nanoscale. The final aim is to develop protection systems with improved corrosion protection properties and a low environmental impact. In partic…
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L’incorporation d’oxyde de molybdene (MoO3, produit de fission) dans les verres borosilicates s’inscrit depuis de nombreuses annees dans la problematique du conditionnement des solutions de dechets de haute activite issues du retraitement des combustibles nucleaires uses. Un exces de cet oxyde de faible solubilite ou…
In this paper, we investigate some of the classical restricted three body problems at the nanoscale, such as the circular planar restricted problem for three C60 fullerenes, and a carbon atom and two C60 fullerenes. We model the van der Waals forces between the fullerenes by the Lennard-Jones potential. In particular,…
Rubbers (elastomeren) zijn zachte en flexibele materialen die worden gekenmerkt door een hoge mate van elasticiteit. De bouwstenen van rubbers zijn, evenals bij andere plastics, lange moleculen. In het geval van rubbers zijn dit flexibele ketens die onderling chemisch met elkaar zijn vernet om afglijding tijdens mecha…
Nanotechnology is the engineering of functional systems at the molecular scale. It has the potential to revolutionize the global food system. Novel agricultural and food security systems, disease treatment delivery methods, and molecular and cellular biology sensors for pathogen detection, environmental protection, an…
En el presente trabajo de tesis se estudió el fitoplancton de arroyos pampeanos del área bonaerense analizando su ecología y su valor como indicador de la calidad del agua. Dentro del marco conceptual establecido con respecto al uso del fitoplancton como indicador se puntualizan los tipos de estrés que producen las fu…
The detailed modelling of heterogeneous catalytic systems is challenging due to the unknown nature of new catalytic materials as well as the often required transient nature of the resulting models. Thus, this thesis deals with the methodologies involved in the kinetic modelling of heterogeneous catalysis and in partic…
Die vorliegende Arbeit untersucht die Wirkungen, die diese multi-axialen Beanspruchungen, auf eine γ-TiAl, Legierung\nunter thermo-mechanischer Ermüdung haben. Das ein-achsige, torsions- und axial-torsionale thermo-mechanische\nErmüdungsverhalten dieser γ-TiAl Legierung ist bei 400 - 800oC mit Dehnungsamplituden von 0…
The controlled cooling of steel on the runout table has become a standard practice in the production of flat hot-rolled products, and since its introduction by BISRA in 1957, has been adopted because it is a vital tool in meeting the increasing demand of steels with better quality and higher mechanical properties. Alt…
Hydration of magnesia-based refractory bricks could occur during storage, during drying after installation, or in service, and the hydration would cause damage to refractory bricks and furnace linings. In order to understand the hydration mechanisms of magnesia-based refractories, three types of bricks were chosen: ma…
In the cells, the last step of the beta-oxidation cycle, aiming at the degradation of fatty acids, is catalyzed by the enzyme named thiolase. It shortens the acyl chain of the acyl-CoA by two carbons. The reaction is reversible, it can proceed for both directions. Thiolases are divided into two categories, synthetic a…
We investigated a nanoscale inertia sensor based on telescoping carbon nanotubes (CNTs) using classical molecular dynamics simulations. The positions of the telescoping CNTs are controlled by the centrifugal forces exerted by the rotation platform and thus position shifts are determined by the capacitance between CNTs…
the microstructural features of the weld section which are controlled by the energy input and heat transfer factors. The welding current, travel speed and the material property govern these parameters. However, the specific influence of range of heat input rates on the microstructural features of FSS weld is hardly re…
Thesis (Master, Mechanical and Materials Engineering) -- Queen's University, 2009-12-19 16:39:12.071
Direct fuel injection technology is increasingly being applied to the spark ignition internal combustion engine as one of the many actions required to reduce the CO2 emissions from road transport. Whilst the potential for CO2 reductions is compelling, the technology is not without disadvantages. Early examples typical…
Phosphorus is an essential element for all known forms of life. In the form of phosphate, this nutrient is retained in soils and sediments by sorption on mineral particles, clays and other soil constituents. In addition, phosphate precipitates with metal ions to form a range of phosphate containing minerals, and only…
The Fe-C-Cr-Mn-Ni-O system is of fundamental importance when describing the influence of oxygen on high alloyed steels. Both solid and liquid phases are of great interest: The solid phases regarding oxidation processes like the formation of oxide layers, inner oxidation, sintering processes and high temperature corros…
Dissertation presented in partial fulfillment of the requirements for the degree of Master in Biotechnology