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Mostrando 1-12 de 15 artigos, teses e dissertações.
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1. Structure and dynamics of poly(9,9-dioctylfluoren-2,7-co-benzothiadiazole) (F8BT) and correlations with its electrical properties / Estrutura e dinâmica molecular do poly (9,9-dioctylfluoren-2,7-diyl-co-benzothiadiazole) (F8BT) e correlações com suas propriedades elétricas.
The PHD project has two main goals. The first one is specifically related to investigations on molecular dynamics, structural conformations and packing of polyfluorene-based polymers. For this purpose, Wide Angle X-Ray Diffraction (WAXD), Solid-State Nuclear Magnetic Resonance (NMR) and Dynamical-Mechanical Thermal Analysis (DMTA) are being used as the main
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/09/2011
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2. A contribution to development of polymeric displays by ink jet technique. / Uma contribuição ao desenvolvimento de displays poliméricos com a técnica Ink Jet.
Organic Light Emitters Diodes OLEDs is a promising field of study and a huge market opportunity to semiconductor players. Thanks to its potential characteristics to replace the main todays display technologies like lightweight, low voltage, wide viewing angle, high resolution, fast switching, broad color range and the possibility to fabricate flexible device
Publicado em: 2008
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3. Fabricação e caracterização de dispositivos poliméricos emissores de luz com camada ativa de poli(2-metóxi, 5-(2-etil-hexilóxi)-1,4-fenileno vinileno) (MEH-PPV) / Fabrication and characterization of polymer light-emitting diodes with active layer composed by poly(2-methoxy, 5-(2-etil-hexilhoxy)-1,4-phenilene vinilene) (MEH-PPV).
Polymer light emitting diodes (PLEDs) have been widely investigated as candidate materials for display fabrication. The main advantages exhibited by PLEDs are the low-cost processing and possibility of large-area display fabrication, in comparison to the conventional liquid crystal displays (LCDs). Although the engineering aspects concerning device fabricati
Publicado em: 2008
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4. Electron transport layer study in polymeric light emission devices. / Estudo das camadas transportadoras de elétrons em dispositivos poliméricos emissores de luz.
Este trabalho tem como objetivo o estudo de camadas transportadoras de carga, em especial de elétrons, em dispositivos poliméricos emissores de luz (PLEDs). Estes dispositivos são obtidos basicamente através da deposição de uma camada emissiva polimérica entre dois eletrodos. Dispositivos poliméricos luminescentes apresentam vantagens quando comparad
Publicado em: 2008
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5. Development of an electronic system of driver and control for perfomance evaluation of displays based on polymer LEDs. / Desenvolvimento de um sistema eletrônico de acionamento e controle para avaliação de desempenho de mostradores de informações baseados em LEDs poliméricos.
In this work it is presented the study and development of an electronic system of test for performance evaluation of polymer light-emitting diodes - PLEDs, or displays with up to 35 PLEDs in passive-matrix produced in laboratory. The drive and control requirements, based in structural and electric characteristics of PLEDs and PLEDs displays, carefully had be
Publicado em: 2007
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6. Dispositivos poliméricos eletroluminescentes
Here we present an overview of electroluminescent devices that use conjugated polymers as the active media. The principal components of the devices are described and we show some examples of conjugated polymers and copolymers usually employed in polymeric light emitting devices (PLED). Some aspects of the photo and electroluminescence properties as well as o
Química Nova. Publicado em: 2006-04
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7. Estudo das propriedades elétricas e ópticas de dispositivos eletroluminescentes poliméricos. / Study of optical and electrical properties of polymer light emitting diodes.
Dispositivos eletroluminescentes poliméricos apresentam alto potencial tecnológico, principalmente devido ao fato de ser possível a obtenção de dispositivos flexíveis e de grande área. Apesar disto, ainda existem alguns fatores que limitam a sua aplicação tecnológica, como por exemplo o tempo de vida e a eficiência na emissão dos dispositivos. Al
Publicado em: 2004
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8. Ecologia floral de duas especies invasoras de Ipomoea (convolvulaceae)
The reproductive system, floral biology, morphology and herbivory of Ipomoea cairica and Ipomoea carnea ssp. fistulosa were studied in the city of Campinas, São Paulo state, Brazil from July 1995 to July 1996. Ipomoea cairica is a herbaceous weed with long climbing shoots, having sexual and vegetative reproduction. The flower are odourless, tubular, with li
Publicado em: 1997
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9. Cell cycle-dependent dynamic localization of a bacterial response regulator with a novel di-guanylate cyclase output domain
Pole development is coordinated with the Caulobacter crescentus cell cycle by two-component signaling proteins. We show that an unusual response regulator, PleD, is required for polar differentiation and is sequestered to the cell pole only when it is activated by phosphorylation. Dynamic localization of PleD to the cell pole provides a mechanism to temporal
Cold Spring Harbor Laboratory Press.
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10. Identification of a novel response regulator required for the swarmer-to-stalked-cell transition in Caulobacter crescentus.
The onset of motility late in the Caulobacter crescentus cell cycle depends on a signal transduction pathway mediated by the histidine kinase PleC and response regulator DivK. We now show that pleD, whose function is required for the subsequent loss of motility and stalk formation by the motile swarmer cell, encodes a 454-residue protein with tandem N-termin
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11. Turning off flagellum rotation requires the pleiotropic gene pleD: pleA, pleC, and pleD define two morphogenic pathways in Caulobacter crescentus.
We have identified mutations in three pleiotropic genes, pleA, pleC, and pleD, that are required for differentiation in Caulobacter crescentus. pleA and pleC mutants were isolated in an extensive screen for strains defective in both motility and adsorption of polar bacteriophage phi CbK; using temperature-sensitive alleles, we determined the time at which th
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12. Protein Sequences and Cellular Factors Required for Polar Localization of a Histidine Kinase in Caulobacter crescentus
The Caulobacter crescentus sensor kinase DivJ is required for an early cell division step and localizes at the base of the newly formed stalk during the G1-to-S-phase transition when the protein is synthesized. To identify sequences within DivJ that are required for polar localization, we examined the ability of mutagenized DivJ sequences to direct localizat
American Society for Microbiology.