Estudo comparativo das tensões e microdeformações ao redor de pilares protéticos microunit e ucla sob carregamento axial estático

Pós-graduação em Odontologia Restauradora - ICT

Morfologia do tecido ósseo de tíbias de frangos de corte submetidos à dieta com 25 hidrocolecalciferol

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Caracterização dos biofilmes de dermatófitos e desenvolvimento de protótipos anti-dermatófitos nas formas planctônica e biofilme

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Aplicação de sensor de deslocamento angular em fibra óptica para medição de concentração de líquidos via ondas acústicas guiadas

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Síntese e caracterização de materiais semicondutores nanoestruturados luminescentes à base de ZnS

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Novos materiais multifuncionais para aplicação em fotocatálise

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Detecção do peptídeo p17 (HIV) baseado em SERS (Surface-enhanced Raman Spectrosocpy)

Pós-graduação em Química - IQ

Determinação de açucares em bagaço de palha de cana-de-açúcar por cromatografia líquida de alta eficiência com detecção eletroquímica utilizando eletrodos de nanotubos modificados com óxidos metálicos

Pós-graduação em Química - IQ

Avaliação da cinetica bacteriana na biolixiviação de calcopirita

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Efeito de diversos protocolos de dessensibilização dentinária na obliteração de túbulos dentinários, resistência de união do sistema adesivo e formação de camada hibrida na dentina cervical

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Estudo comparativo para fabricação de peças aeronáuticas: forjamento x usinagem

This paper shows a technical-economic analysis of the substitution of raw material machined metal parts for a forged preform. At the end, it shows that the economic gain by the machining process substitution for a forged preform is significant for the samples analysed

Estudo da resistência à corrosão de ligas Ni-Cr-Mo-Ta E Ni-Cr-Mo-W em solução NaF 0,08 mol/L, pH 4,7 para aplicações odontológicas

A large number of metal alloys are used in Dentistry for the manufacture of fixed and removable dentures. In the oral cavity, these structures are exposed to a chemically aggressive medium, like saliva and mechanical efforts, like mastication. In addition, acidic solutions containing fluoride ions are also frequently used in dental treatments to prevent dental plates and decays development. In this context, it was considered important to investigate the influence that a fourth element could exert when added to the ternary alloy Ni-Cr-Mo, largely used in Brazil. Therefore, electrochemical tests were done to evaluate the resistance to corrosion of quaternary alloy 65Ni-25Cr-5Mo-5Ta and 65Ni-25Cr-5Mo-5W in NaF solution 0,08mol / L, pH = 4.7. For greater understanding the microstructure and morphology of alloys were studied, through metallographic analysis, using optics microscopy and electron microscopy scanning. For the electrochemical tests were applied techniques traditionally used in corrosion researches, such as: potential measures in open circuit (OCP) and cyclic polarization (CP). It was found that both quaternary alloys showed very similar results. Comparing these quaternary alloys with the ternary 65Ni-25Cr-10Mo, it was found that the quaternary alloys exhibit greater resistance to corrosion, in other words, less passivation current density than the ternary alloy, showing that it is advantageous to add a fourth element in the alloy

Desenvolvimento de sensores de gás a partir de óxido semicondutor nanoestruturado

The present work aims to study one-dimensional nanomaterials semiconductors grown via by phase systems Grande oxides Technological Interest for applications in gas sensors. The Used material was tin oxide (SnO2) for their functional properties, and the grow method was the Polymeric Precursors. The films grown were the nanomaterials about substrates of alumina, deposited via spin coating technique, followed by heat treatment at 300C for 1 hour and 650C for 2 hours. Later the films of Performance sensors (sensitivity, speed response, selectivity, and stability) will be in avaliated in a hermetic chamber with controlled atmosphere and temperature. The synthesized materials were its structural and morphological properties characterized in atomic force microscopy (AFM), scanning electron microscopy (SEM), X-ray diffraction (XRD) and transmission electron microscopy (not have this result with Me). We sought to investigate one influence of different conditions for obtaining films (Variation Layers number) in structural and microstructural properties of semiconductors oxides. The synthesis method proved very effective, generating films with micro definitely, uniformity of the nanoparticles and hum high level of porosity, what makes the material of a viable final paragraph applicability

Verificação de pilares metálicos compostos constituídos por perfis formados a frio por meio de programa computacional

In this work, we discuss the procedures adopted for the design of built-up columns (laced and battened columns). Built-up columns are widely used in steel construction generally when the compression forces are relatively low and the column buckling lengths are large. They are commonly used in industrial buildings, for example, as posts for cladding, or as columns supporting a crane girder. Unlike columns with full section, in the case of built-up columns, it is necessary to evaluate the shear stiffness. In fact, the shear strength leads to a significant reduction of the critical load. In the context of this work, the components of the columns (chords, diagonals, posts, etc.) are formed by cold-formed members. In order to systematize and rationalize the verification of the built-up columns, this work aim to develop a computer program based on the standards NBR 14762, NBR 6355 and Eurocode 3, basically the considerations of the part EN 1993-1-1

Projeto estrutural de galpão metálico segundo recomendações da NBR8800

This work deals in a general way, the history and advantages of steel buildings, as well as its increasing usage in Brazil in the last century. This work also generally describes some types and its uses of metal frame. It also demonstrates the use of the NBR 8800: 2008 standard and its calculation methods through the scale out materials regulated in Brazil for an industrial warehouse project small and simple portico metal frame. Given that the construction requirements include a locational influence following the normative indications of the NBR 6123, for the winding scale out, since this effect combined with the permanent loads must be seriously evaluated due to the shape type effort about acting simultaneous axial force and bending moments obeying the limitations applied to the structure according to NBR 8800. As it has been explained the calculations that ensures mechanical stability and suggesting an analysis of the efficiency of the used materials