Maturação de sementes de Poincianella Pluviosa (DC.) L. P. Queiroz (Sibipiruna): sementes tolerantes à dessecação e de baixa viabilidade no armazenamento

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Resveratrol como meio de estocagem para dentes avulsionados: estudo in vitro da viabilidade celular

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Viabilidade do Código MCNPX para o Estudo da Técnica de Fluorescência de Raios-X por Reflexão Total

The X-ray fluorescence analysis (XRF) is an important technique for the qualitative and quantitative determination of chemical components in a sample. It is based on measurement of the intensity of the emitted characteristic radiation by the elements of the sample, after being properly excited. One of the modalities of this technique is the total reflection x-ray fluorescence (TXRF). In TXRF, the angle of refraction of the incident beam tends to zero and the refracted beam is tangent to the sample-support interface. Thus, there is a minimum angle of incidence that there is no refracted beam and all the incident radiation undergoes total reflection. As it is implemented in very small samples, in a film format, self-absorption effects should not very relevant. In this study, we evaluated the feasibility of using code MCNPX (Monte Carlo N - Particle eXtended), to simulate a measure implemented by the TXRF technique. In this way, it was verified the quality of response of a system by TXRF spectroscopy using synchrotron radiation as excitation beam for a simple setup, by retrieving the characteristic energies and the concentrations of the elements in the sample. The steps of data processing, after obtaining the excitation spectra, were the same as in a real experiment and included the obtaining of the sensitivity curve for the simulated system. The agreement between the theoretical and simulated values of Ka characteristic energies for different elements was lower than 1 % .The obtained concentration of the elements of the sample had high relatively errors ( between 6 and 60 % ) due mainly to lack of knowing about some realistic physical parameters of the sample , such as density . In this way, this result does not preclude the use of MCNPX code for this type of application

Viabilidade da geração de eletricidade a partir de fonte eólica on-shore: dificuldades e vantagens de expansão na matriz elétrica brasileira

The renewable energy sources presents an important role on the world's current context, its growing is essentially connected to the environmental issues and the energetic security, guided by the search for alternatives of energy. Among the alternative energy sources, the wind energy shows great importance in the brazilian territory, it has a great potential still unexplored and constant growth in the national electric matrix. The specific factor of generation, the conjuncture and the incentive politics influence on the expansion of wind energy in Brazil. Thus, the brazilian wind sector shows features which can be evaluated enable its developing. Keeping that in mind, the present work aims identify which are the advantages and the difficulties for the expansion of this energy source in the brazilian electric matrix. For that, the work studies the different parameters: features of electric generation of the different energy sources, incentive politics, generation costs, CO2 emission, evolution of wind energy in Brazil, the brazilian wind potential, and the regime of complementarily hydro-wind

Viabilidade técnica e econômica do uso da energia solar térmica em condomínios horizontais com habitações populares

Pós-graduação em Engenharia Mecânica - FEG

Estudo da viabilidade de implantação de plantas para conversão de energia térmica do oceano (OTEC) no Brasil

Pós-graduação em Engenharia Mecânica - FEIS

Contaminación microbiana en las líneas de agua de las unidades odontológicas

Introduction and Objective: Microorganisms are responsible for multiple infections and pathologies; this is why it is important to control microbes that can be found in the triple syringe used for irrigation in different dental procedures. The aim of this study was to identify cultivable species of microbes (fungus and bacteria) found in some dental units water lines of a private dental clinic from Medellín, Colombia. Materials and Methods: Random samples were taken from 11 chairs from a total of 89; a sample of water of 500ml was collected from the triple syringe of each selected chair. The study aim to search for the presence of total coliforms, filamentous fungi and leavened Results: the average presence of microorganisms was between 40CFU and more of 200 CFU. Microorganisms such as Aeromona salmonicida, Actinobacilus sp and Pseudomona maltophil were isolated. No total coliforms neither fecal coliforms were found. Conclusions: the high levels of contamination suggest that there is a mature biofilm in somewhere of the dental unit water line, but the absence of total and fecalis coliforms suggest that the water had been treated.

Viabilidade de sementes de Handroanthus heptaphyllus (Vell.) Mattos armazenadas nos frutos

Pós-graduação em Ciência Florestal - FCA

Difusão de objetos de aprendizagem multiplataforma por transmissão de televisão digital: um estudo de viabilidade técnica e pedagógica

Pós-graduação em Televisão Digital: Informação e Conhecimento - FAAC

Determinação molecular da viabilidade do Mycobacterium leprae: uma comparação com outras abordagens metodológicas

Pós-graduação em Doenças Tropicais - FMB

Estudo da diversidade microbiana e níveis de endotoxinas em lesões endo-periodontais

Pós-graduação em Odontologia Restauradora - ICT

Viabilidade do recipiente biodegradável na produção de mudas florestais nativas

Pós-graduação em Ciência Florestal - FCA

Viabilidade e eficiência de óleos essenciais no manejo do míldio da videira

Pós-graduação em Agronomia - FEIS

Viabilidade agroeconômica do consórcio de couve com espinafre 'Nova Zelândia'

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Fibra para cães: efeitos sobre o processo de extrusão, digestibilidade, fermentação microbiana, tempo de retenção intestinal e palatabilidade de rações para cães

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)