Optic Electronic
Mostrando 13-24 de 30 artigos, teses e dissertações.
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13. Estudo de ovos de quatro espécies do gênero Meccus (Hemiptera, Reduviidae, Triatominae), vetores da doença de Chagas
The objective of this work was to analyze the morphological, morphometrical, and histological characteristics of eggs of four triatomine bugs species still not studied, in order to understand phylogenetic aspects and to facilitate parameters used in taxonomy, with the purpose of a specific and generic characterization of these vectors in public health. The e
Memórias do Instituto Oswaldo Cruz. Publicado em: 2007-02
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14. Preparation and study of photodegraded polimeric matrix composites for photovoltaic cells encapsulation / Preparação e estudo da fotodegradação de compósitos de matriz polimérica para encapsulamento de células fotovoltaicas
The solar cells components are made off blades and metallic and ceramic semiconductors films. Such materials are not inert to the terrestrial atmosphere action. In this context, important part of the fotovoltaics modules production includes stages for the cells protection. These will have to be preserved from aggressive actions of the environment, for what t
Publicado em: 2007
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15. Development of dissolved oxygen sensors using electrochemical and optic methods for real time monitoring of water quality. / Desenvolvimento de sensores de oxigênio dissolvido utilizando métodos eletroquímicos e ópticos para monitoramento em tempo real da qualidade da água.
This work aims the development of a dissolved oxygen (DO) sensor using thick film technology, which has low cost of production and keeps sensors durability and precision acceptable for their use in the monitoring of water sources. This development also includes the complete electronic circuits for autonomous monitoring. Using the principles of oxygen electro
Publicado em: 2007
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16. Polimetalates porphyrins with ruthenium phosphinics complex to application in homogeny catalyze, Non Linear Optic and Langmuir-Blodgett film preparation / Porfirinas polimetaladas com complexos periféricos de rutênio com aplicações em catálise homogênea, óptica não linear e montagem de filmes de Langmuir-Blodgett
A novel metaloporphyrin with ruthenium complexes, {H2-TPyP[RuCl(dppb)(Xbipy)] 4}(PF6)4 and {M-TPyP[RuCl(dppb)(X-bipy)]4}(PF6)4, (where M = Mn(III), Co(II) and Zn(II), X = Me- MeO- and Cl-) has been synthesized and structurally characterized by 31P{1H} magnetic resonance, UV-Vis and IR spectroscopy, cyclic voltammetry and CHN. The catalytic activity of {Mn-TP
Publicado em: 2007
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17. Desenvolvimento de sistemas portáteis de monitoramento eletroquímico. / Development of portables electrochemical monitoring systems.
This work presents the development of two different portable electrochemical detection systems. Both systems are applicable in environment and biomedical areas. The electrochemical detection techniques have many interesting advantages, when compared to other detections techniques, such as good sensitivity, good selectivity, and low maintenance cost. The dete
Publicado em: 2007
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18. Estudo do desenvolvimento do aparelho digestório de embriões bovinos (Bos indicus e Bos taurus) durante o período gestacional compreendido entre 10 e 60 dias / Study of development of digestive tract of bovine embryos (Bos indicus and Bos taurus) during gestational period between 10 and 60 days
The embryonary period extends itself from 15th to 45th day of gestation in cows, when a fast growing and differentiation occurs, during which the main organs, tissues and systems are established and the main characteristics are recognized. In bovines, most of the organs and parts of body are formed between 2th and 6th week of gestation. During this period, t
Publicado em: 2007
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19. Desenvolvimento de processos de deposição de filmes filmes sobre substratos polimericos fotopolimerizdos / Development of process of deposition of thin films on photopolymerization polymeric substrats
A new era has begun all around the world. The quality of life and health depends more and more on the human capacity of resolving problems that are becoming longer and more complex day by day. As communication and globalization advance, time becomes scarcer and more precious. The semiconductor materials which are used to activate the logical functions, the h
Publicado em: 2007
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20. Preparação e caracterização de pentóxido de vanádio mesoporoso e reações de intercalação / Synthesis and characterization of mesoporous vanadium pentoxide and intercalation reaction
Synthesis, characterization of vanadium pentoxide mesoporous and studies of properties of hybrids compound based on vanadium oxide xerogel and vanadium pentoxide mesoporous, intercalated with guest species have been the main of this thesis. The interest in those materials, that present a considerable structural and chemical modification, is due to the possib
Publicado em: 2007
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21. Modelagem endoscÃpica virtual do monitoramento de equipamentos elÃtricos de alta tensÃo
With the promulgation of the 10.847/2004 and 10.848/2004 Laws, the Brazilian Power Sector started adopting competitiveness as the main element for obtaining concessions in the electric power system transmission and generation sectors. In this sense, the power sector companies will have to strongly intensify the monitoring processes of the power system equipm
Publicado em: 2007
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22. Análise "in vitro" da resistência adesiva de sistemas adesivos autocondicionantes com o substrato dentinário após a desproteinização dentinária
The purpose of this study was to evaluate in vitro the bond strength of the self etch adhesive systems One Coat SE Bond, Self Etch Bond, and XENOIII with the dentin substrate, by means of the microtensile bond strength test, after dentin deproteinization. The conventional adhesive system Adper Single Bond/3M-ESPE was used as group control. Thirty five human
Publicado em: 2005
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23. Monte Carlo studies of miniband conduction in extreme type-II superlattices
Miniband charge transport was investigated by Monte Carlo simulations of electronic motion in short period superlattices of type-II energy band alignment (InAs/GaSb composition). The strong decrease of the miniband energy width when the electronic in-plane energy increases, characteristic of type-II superlattices, leads to a conductivity that is very sensiti
Brazilian Journal of Physics. Publicado em: 2004-06
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24. Crescimento de grãos anômalos em titanato de bário. / Abnormal grain growth in barium titanate.
Barium Titanate (BaTiO3) and derived material are extensively used in the manufacture for a large range of electronic components like multilayer ceramic capacitors (MLCC), semi-conductor devices, PTCR (positive temperature coefficient resistor) and electro-optic devices. Advanced ceramic powders preparation is playing an important role in modern ceramic rese
Publicado em: 2004