Transparent Materials
Mostrando 25-36 de 48 artigos, teses e dissertações.
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25. Study of charge transport layers in polymer light emitting diodes. / Estudo de camadas transportadoras de cargas em diodos emissores de luz poliméricos.
In the present work, the study of the optical and electrical properties of polymeric electroluminescent devices known as Polymer Light-Emitting Diodes (PLEDs) and the development of Hole Transport Layers (HTLs) to promote an increase of the electrical efficiency of the devices was performed. PLEDs were constructed with structures like Anode/HTL/Electrolumine
Publicado em: 2007
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26. Thermal performace of glasses in building construction: study in test-cells / Desempenho termico de vidros utilizados na construção civil : estudo em celulas-teste
Thermal performance of buildings depends on several factors, such as implantation, orientation, materials and building components, which should be appropriately defined for different climate conditions. The building acts as a controller of the climatic variables, through the building envelope (walls, floor, roof and openings) and the nearby elements. Buildin
Publicado em: 2006
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27. Preparação de eletrodos opticamente transparentes
A simple experiment for the preparation of transparent conducting glass electrodes by deposition of pure and fluorine doped SnO2 films is described. This procedure was tested in the undergraduate inorganic course at IQ-UNICAMP. The success in achieving a conducting layer was easily checked using the standard probes of a volt-ohm meter. The optical transmitta
Química Nova. Publicado em: 2005-03
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28. InfluÃncia do tamanho e forma na qualidade das sementes de milho durante armazenamento / Effects of seed size and format upon maize seeds quality during storage.
Corn, a species originating from the Americas, adapted by researchers to different climatic conditions and planting seasons, has great importance in the world economic context. The mass production of seeds aims to the maximum utilization of raw materials and to facilitate and make uniform planting. Seeds are classified according to their diverse size to the
Publicado em: 2004
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29. Filmes de titânio-silício preparados por "spin" e "dip-coating"
The conditions for the preparation of luminescent materials, consisting of Eu3+ ions entrapped in a titanium matrix, in the forma of a thin film, using the sol-gel process, are described. The films were obtained from sols prepared with TEOS and TEOT, in the presence of acetylacetone as the hidrolysis-retarding agent, using the dip-coating and spin-coating te
Química Nova. Publicado em: 2003-10
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30. Caracterização espectroscópica de possíveis meios ativos para lasers de Nd3+ e Tm3+ / Spectroscopic characterization of possible Nd3+ and Tm3+ laser active media
In this work we have made an important contribution to the growing research of new laser materials that can be pumped by low cost diode lasers or by the Upconversion process to operate in the near-infrared and visible spectral regions. Three kinds of hosts, doped with the rare earth ions (Nd3+ and Tm3+) were studied, and they present potential characteristic
Publicado em: 2003
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31. Tecnologia solar de interesse social e baixo custo para aquecimento de agua na moradia
Low cost technological solutions are defined here as practices that ally thermal efficiency and low investments for the economical and social context of low income populations. These solutions imply in the use of low cost recyde materials and row materials. The present work analyses solar heat water technologies for Brazilian poor people, faced their energet
Publicado em: 2002
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32. Estudo comparativo da degradação de poliestireno e de poliestireno de alto impacto por envelhecimentos natural e artificial. / Comparative study of natural and artificial weathering of polystyrene and high impact polystyrene.
The study of weathering materials regarding to climate, stresses, time, temperature, is essential to choose the materials for a purpose. Polystyrene is a polymeric resin with much usage in the market as it is transparent and relatively cheap, but it is not indicated for outdoor purposes with much actinic radiation exposure, as it is very sensitive to weather
Publicado em: 2002
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33. "Síntese e caracterização espectroscópica de materiais orgânicos para eletrônica molecular" / "Synthesis and spectroscopic characterization of the organic materials for molecular electronic"
This work was separated in two parts, in the first, called PART A, the synthesis of the polymers PPV, Cl-PPV, Br-PPV and of the co-polymers (Cl-PPV)m / (PPV)n and (Br-PPV)m / (PPV)n in the following relationships m:n of 30:70; 50:50 and 70:30 are presented. These polymers were characterized by infrared spectroscopy, UVvisible and fluorescence emission. The m
Publicado em: 2002
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34. Resinas de silicona a base de silsesquioxanos: síntese, estudo estrutural, morfológico e avaliação do comportamento térmico
In the present work the synthesis, structure, morphology and thermal behaviour of silicone resins prepared from phenyltrichlorosilane, phenyltriethoxysilane, n-octyltriethoxysilane or n-dodecyltriethoxysilane, as sources of T units, and poly(dimethylsiloxane) or 1,3-diethoxytetramethyldisiloxane, as sources of D units were investigated. Two series of resins
Publicado em: 2001
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35. Condições de trabalho e saude dos professores sindicalizados de ensino fundamental e medio da rede privada de Campinas
The current study aims at giving an initial diagnosis of working and health conditions of unionized teachers in elementary and secondary schools in Campinas. In this sense, the assignment is based on innovative and descriptive research. Its specific objectives are to learn about working conditions and main health problems of teachers, as well as identify hea
Publicado em: 2000
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36. Caracterização otica em materiais transparentes e sua relação com o confortoambiental em edificação
In this work, the characterization and analysis of the solar radiation transmission through transparent materials appropriated for buildings façades is presented. Materials such as reflective sputtered glasses, polycarbonates and commercial polymeric films for solar control on float glass are studied. The electrocromic glass type, promissory new material un
Publicado em: 1998