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Dissertations / Theses on the topic 'Ppev'

Author: Grafiati

Published: 7 July 2024

Last updated: 31 July 2025

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1

Gouin, Carla. "Tropisme cellulaire initial du SARS-CoV-2 dans le poumon humain : du poumon entier aux sous-populations de macrophages." Electronic Thesis or Diss., université Paris-Saclay, 2023. http://www.theses.fr/2023UPASL147.

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Les mécanismes pathogéniques impliqués dans les phases initiales de l'infection par le SARS-CoV-2 restent mal compris au niveau pulmonaire, en dépit d'une abondante activité de recherche depuis l'émergence de la pandémie COVID-19. Des travaux conduits sur des modèles de culture de cellules humaines isolées, d'explants, d'organoïdes ou de lung-on-a-chip ont donné des résultats discordants quant aux cibles initiales pulmonaires principales du virus et à la réponse innée induite. Dans ce travail de thèse, j'ai évalué un modèle original d'étude des premières étapes de l'infection virale qui consis

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2

Jonasson, Simon. "Phoenix. : PPE wildfire respirator." Thesis, Umeå universitet, Designhögskolan vid Umeå universitet, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-162081.

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Forest fires has become an increasing threat all over the world. Pollution and rising greenhouse gases has led to an ever increase in global temperatures. Sweden has previously been spared from larger fires, but in the past few year it has been been made clear that these climate changes will affect the number and intensity of forest fires. In this project I have investigated how forest fires work and how the process of extinguishing them looks today. With a focus on the personal equipment I have looked into how to improve the working environment and the safety for fire-fighters. Using the de

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3

Souza, Solange Maria Batista de. "Contribuições à implementação do PPEC: superando dualidades." Universidade Federal de Juiz de Fora, 2015. https://repositorio.ufjf.br/jspui/handle/ufjf/1375.

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Submitted by Renata Lopes (renatasil82@gmail.com) on 2016-05-03T19:51:31Z No. of bitstreams: 1 solangemariabatistadesouza.pdf: 3126349 bytes, checksum: 525938cce27840ef652c0c257a0bc89a (MD5)<br>Approved for entry into archive by Adriana Oliveira (adriana.oliveira@ufjf.edu.br) on 2016-06-07T15:20:13Z (GMT) No. of bitstreams: 1 solangemariabatistadesouza.pdf: 3126349 bytes, checksum: 525938cce27840ef652c0c257a0bc89a (MD5)<br>Made available in DSpace on 2016-06-07T15:20:13Z (GMT). No. of bitstreams: 1 solangemariabatistadesouza.pdf: 3126349 bytes, checksum: 525938cce27840ef652c0c257a0bc89a (M

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Kub, Christopher. "Hyperbranched conjugated polymers: an investigation into the synthesis, properties and postfunctionalization of hyperbranched poly(phenylene vinylene-phenylene ethynylene)s." Thesis, Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/34838.

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There are two general ways to introduce functionalities into a polymeric structure: functionalization of the monomeric units before polymerization and postfunctionalization of the preformed polymer. Building libraries of polymers with different functionalities can be completed with significantly less effort by the second method, as each postfunctionalization of a single batch of polymeric backbone can involve as little as one synthetic step. One method of building a polymeric backbone for postfunctionalization involves the synthesis of hyperbranched conjugated polymers (HCPs) from AB2 monome

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5

Fischer, Timo. "Parapockenvirus (PPV) als neuartige Vektorvakzine Entwicklung Pseudorabiesvirus-(PRV)-spezifischer PPV-Rekombinanten und Untersuchung deren Immunogenität im Mausmodell /." [S.l.] : [s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=965634124.

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6

Gamael, Amin. "Ergebnisse nach kombinierter Operation PPV und Linsenchirurgie /." [S.l.] : [s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=972337334.

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7

Silva, Ricardo Manuel Pinho. "Células solares orgânicas baseadas em MEH-PPV." Master's thesis, Universidade de Aveiro, 2009. http://hdl.handle.net/10773/2626.

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Mestrado em Engenharia Física<br>No presente trabalho procedeu-se ao estudo e fabrico de células solares orgânicas do tipo bulk heterojunction, baseadas no polímero poly(2-methoxy-5- (2-ethylhexyloxy)-1,4-phenylenevinylene) (MEH-PPV) dopada com a nanoestrutura [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) em filmes finos . A caracterização opto-electrónica revelou uma forte absorção na zona espectral azul-verde, confirmando a aplicabilidade destes materiais para este tipo de dispositivos. Foram obtidos valores relevantes em parâmetros como factor de forma e eficiência. É apresentada uma te

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8

Greenham, Neil Clement. "Electroluminescence in conjugated polymers." Thesis, University of Cambridge, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.296643.

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9

Bailey, Dalan. "Development of reverse genetics for peste des petets ruminants virus (PPRV)." Thesis, University of Reading, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.494788.

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Peste des petits ruminants virus (PPRV), a member of the Morbillivims genus in the family Paramyxoviridae, is the cause of a serious and emerging plague of small ruminants, mostly affecting sheep and goats. It is endemic in many developing countries in Africa and southern Asia and is highly contagious, with the mortality rate approaching 90% in some outbreaks. Development of reverse genetics systems for other morbilliviruses such as rinderpest and measles has allowed more focused research into replication, pathogenicity and marker vaccines.

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10

Cossiello, Rafael Di Falco 1980. "Fotofisica de polimeros emissores de luz : MEH-PPV." [s.n.], 2003. http://repositorio.unicamp.br/jspui/handle/REPOSIP/249455.

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Orientador: Teresa Dib Zambon Atvars<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Quimica<br>Made available in DSpace on 2018-08-03T21:54:50Z (GMT). No. of bitstreams: 1 Cossiello_RafaelDiFalco_M.pdf: 1572837 bytes, checksum: 19e63ede7b38e238cbb9b8b3d9a68b93 (MD5) Previous issue date: 2003<br>Mestrado

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11

Wallaart, Johannes Christiaan Safety Science Faculty of Science UNSW. "Identification, elimination and reduction of barriers to the effective use of respiratory personal protective equipment." Publisher:University of New South Wales. Safety Science, 2008. http://handle.unsw.edu.au/1959.4/43293.

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This thesis is concerned with the identification, elimination and reduction of barriers to the use of personal respiratory protective equipment (RPE) in the workplace to reduce and prevent occupational inhalation disease. Respiratory Protective Equipment (RPE) is widely used in industry, health, emergency response, military settings and many other applications and are in daily use by thousands of people in Australasia. The equipment is generally used to filter or ab/adsorb the contaminants from the air prior to delivery to the wearer by filtering or ad/absorbing contaminants from the air pr

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12

Lear, Jeremy M. "The Synthesis of Benzyloxy Substituted DP-PPV and Examination of the Horner-Wadsworth-Emmons Reaction in the Synthesis of DP-PPV." Wright State University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=wright1401459783.

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13

Janakiraman, Umamaheswari. "Analysis of electrogenerated chemiluminescence of PPV type conducting polymers." Doctoral thesis, [S.l. : s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=968755305.

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14

Weir, Bruce Alexander. "Structure and morphology of PPV-derived polymers and oligomers." Thesis, University of Cambridge, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.621077.

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15

Grimes, Amy Frances. "Toward optimization of photomodulation of azobenzene-modified PPV derivatives." College Park, Md. : University of Maryland, 2007. http://hdl.handle.net/1903/7607.

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Thesis (Ph. D.)--University of Maryland, College Park, 2007.<br>Thesis research directed by: Dept. of Chemistry and Biochemistry. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

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16

Saar, Brooklynd Dawn. "Fluorescence Quenching of PPV-SO and Bodipy-Naphthalene Systems." W&M ScholarWorks, 2012. https://scholarworks.wm.edu/etd/1539626932.

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17

Masuda, Koji. "Design and Fabrication of Nanostructures by Layer-by-Layer Assembly for Organic Photovoltaic Devices." 京都大学 (Kyoto University), 2010. http://hdl.handle.net/2433/123342.

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18

Thamyongkit, Patchanita. "Synthesis and characterization of pyrazine and phthalocyaninatonickel(II) substituted PPV analogous oligomers Synthese und Charakterisierung von Pyrazin- und Phthalocyaninatonickel(II)-substituierten PPV-anologen Oligomeren /." [S.l. : s.n.], 2001. http://deposit.ddb.de/cgi-bin/dokserv?idn=963899929.

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19

Wetzel, Thierry. "Obtention d'outils moléculaires pour la détection et la différenciation du virus de la sharka (PPV) : clonage de l'ARN génomique d'une nouvelle souche de PPV." Bordeaux 2, 1991. http://www.theses.fr/1991BOR22016.

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Le plum pox potyvirus (ppv) est l'agent responsable de la sharka, la maladie virale actuellement la plus grave pour les arbres fruitiers a noyau. A cause de la faible concentration et de la repartition irreguliere du virus dans les arbres infectes, des techniques de detection du virus extremement sensibles sont necessaires. Un test de detection du ppv par hybridation moleculaire utilisant des sondes arnc marquees au #3#2p correspondant a des genes codant pour des proteines virales non structurales de ppv-d ont permis une augmentation de la polyvalence du test par rapport a une sonde correspond

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20

Timpanaro, Salvatore. "Conductive properties and morphology of conjugated molecular materials studied by local probe techniques." Phd thesis, [S.l. : s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=974115991.

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21

Mahasha, Phetole Walter. "The trafficking of the Mycobacterium tuberculosis PE and PPE proteins." Thesis, Stellenbosch : University of Stellenbosch, 2007. http://hdl.handle.net/10019.1/1862.

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Thesis (MScMed (Biomedical Sciences. Molecular Biology and Human Genetics))--University of Stellenbosch, 2007.<br>The expansion of the Mycobacterium tuberculosis PE and PPE gene families seems to be linked to that of the immunologically-important ESAT-6 (esx) gene clusters secretion system, as the ancestral members of these families are found only within the ESAT-6 gene cluster regions. These ancestral members are also the only copies in the earlier mycobacteria like M. smegmatis. The later duplications of the PE and PPE families belonging to the PGRS and MPTR subgroups, have been implicat

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22

Fogle, Jeffrey D. "Synthesis of Fluorinated Indenofluorenediones and Bis(2-fluorophenyl) Substituted PPV." Wright State University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=wright1309441933.

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23

Costa, Rui Jorge Gonçalves. "Interpretação no turismo: o caso do Portugal dos Pequenitos (PPE)." Master's thesis, Universidade de Aveiro, 2012. http://hdl.handle.net/10773/9338.

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Mestrado em Gestão e Planeamento em Turismo<br>Atualmente, o Turismo tem-se afirmado como uma das principais atividades económicas a nível mundial. Em Portugal, o Turismo representa cerca de 10% do PIB nacional, sendo vital para o desenvolvimento e crescimento de toda a economia nacional. Com o aparecimento de novas necessidades dos turistas, a interpretação assume-se como uma das principais ferramentas do Turismo, dando resposta às diferentes exigências e motivações dos turistas e tem promovido a identidade cultural das atrações turísticas e uma maior satisfação dos turistas. Assim, pretend

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24

Majeed, Awais. "A process performance evaluation framework (PPEF) for partner selection during virtual organisation creation phase." Thesis, University of Manchester, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.504699.

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A Virtual Organisation (Va) is a form of collaborative network that is formed when multiple independent enterprises join together to share theirs skills, costs, resources and knowledge, in order to respond to a new business opportunity. Normally,' such enterprises use information and communication technologies (lCT) for collaboration and cooperation. Selection of partner enterprises to form the va is the most important activity in the creation phase of the VO life cycle. Various approaches to solving the problem of partner selection have been proposed in the literature. The problem has been st

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25

Buczkowski, Hubert. "Development of marker vaccines for rinderpest (RPV) and peste des petits ruminants (PPRV) viruses." Thesis, Royal Veterinary College (University of London), 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.558958.

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26

Sanz, Bernardo Beatriz. "Control of host innate immune (interferon) responses by peste des petits ruminants virus (PPRV)." Thesis, St George's, University of London, 2015. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.703281.

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Peste des petits ruminants virus (PPRV) produces clinical disease in goats and sheep. PPRV is a morbillivirus, others of which are known to affect the activation of the innate immune response by the actions of their accessory proteins (V&C). A crucial part of normal activation is the induction of interferon β (IFNβ) after pathogen recognition by pattern recognition receptors (PRRs). The presence of viral RNA can be sensed by the cytosolic proteins MDA-5 and RIG-I, starting a signalling cascade that leads to the activation of the IFNβ promoter and the synthesis of IFNβ. The production of IFNβ i

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27

Olivati, Clarissa de Almeida. "Estudo das propriedades elétricas e ópticas de dispositivos eletroluminescentes poliméricos." Universidade de São Paulo, 2004. http://www.teses.usp.br/teses/disponiveis/76/76132/tde-08122010-094137/.

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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. Alguns métodos têm sido propostos para o aumento destes fatores, entre os quais estão a inserção de camadas transportadoras de elétrons e buracos. Esta tese teve como objetivo principal a busca por métodos que possibilitassem a melhora das propriedades e

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Alves, Marcelo Caetano Oliveira. "Estudo de soluções de MEH-PPV em dosimetria de radiação gama." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/59/59135/tde-03092008-091923/.

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O presente trabalho teve por objetivo o estudo da viabilidade de utilização de soluções de poli[2-metóxi,5-(2-etil-hexiloxi)-p-fenileno vinileno] (MEH-PPV), em diversos solventes tais como CHCl3 (Clorofórmio), diclorometano (CH2Cl2), bromofórmio (CHBr3), dibromometano (CH2Br2), uma mistura de diclorometano (CH2Cl2) e diiodometano (CH2I2) e tolueno (C6H5CH3), como dosímetros de radiações ionizantes. A novidade está no fato de que estes dosímetros têm como principal característica a variação da cor, proporcionando uma medida visual e direta da radiação recebida. Além disso, a sensibilidade dos d

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29

Ferreira, Ana Guida Coutinho. "Promoção da eficiência no consumo de energia eléctrica: o caso do plano de promoção da eficiência no consumo." Master's thesis, Instituto Superior de Economia e Gestão, 2010. http://hdl.handle.net/10400.5/2239.

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Mestrado em Economia e Políticas Públicas<br>Com o desenvolvimento económico a estimular a procura de energia, e a existência de barreiras e falhas de mercado que dificultam a eficiência energética, é fundamental a implementação de programas de promoção da eficiência energética e de gestão da procura. Em Portugal, o Plano de Promoção da Eficiência no Consumo de energia eléctrica, que teve a sua primeira edição em 2007, visa promover medidas no âmbito da eficiência energética, mediante um concurso aberto a vários agentes. Este relatório descreve o processo de avaliação das quatro medidas do seg

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30

Lenihan, Catherine. "Functional characterisation of VAV-interacting Krüppel-like factor (VIK) in breast cancer." Thesis, Queen Mary, University of London, 2017. http://qmro.qmul.ac.uk/xmlui/handle/123456789/24559.

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Background. VAV interacting Krüppel-like factor (VIK) is a novel transcription factor. Previously our lab reported a series of breast cancer tumour samples where VIK methylation was associated with an increased risk of recurrence in tamoxifen-treated patients, indicating a role for VIK in ER positive breast cancer and endocrine resistance. Additionally VIK has been shown to be involved in cell cycle regulation, interacting with CDK4 and VAV1. The cyclin D-CDK4/6-Rb pathway is frequently dysregulated in ER positive breast cancer. Combined treatment of palbociclib, a highly selective CDK4/6 inh

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31

Postacchini, Bruna Bueno. "Fotofísica em heteroestruturas contendo o polímero emissor PPV e espécies supressoras." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/76/76132/tde-30012009-114630/.

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A compreensão dos caminhos de desativação não radiativa em polímeros conjugados é fundamental para o uso desses materiais em dispositivos luminescentes, células fotovoltaicas e sensores. Nesta tese, os processos não radiativos em filmes automontados de polímero luminescente foram investigados via análise da supressão de intensidade de fotoluminescência, utilizando a técnica de fluorescência estacionária, e através da medida do tempo de vida do estado excitado com fluorescência resolvida no tempo em arranjo de contagem de fótons. A camada emissiva constituída por poli(p-fenileno vinileno) (PPV)

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Marconi, Flávia Maria. "Síntese e caracterização de polímeros com propriedades eletroluminescentes." Universidade de São Paulo, 2002. http://www.teses.usp.br/teses/disponiveis/88/88131/tde-14112014-102419/.

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Durante este trabalho foram sintetizados e caracterizados três derivados dialcoxilados do poli(p-fenileno-vinileno) que diferem entre si pelo tamanho de uma das cadeias laterais: o poli(2-metoxi-5-hexiloxi-p-fenileno-vinileno), MH-PPV, o poli(2-metoxi-5-dodecoxi-p-fenileno-vinileno), MD-PPV e o poli(2-metoxi-5-hexadecoxi- p-fenileno-vinileno), MHd-PPV. Esses polímeros apresentam propriedades eletroluminescentes e podem ser utilizados em dispositivos emissores de luz. A síntese consiste de três etapas: síntese do éter aromático; bisclorometilação do éter aromático, gerando o monômero; e polimer

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33

Todescato, Francesco. "Functional dielectric/semiconductor and metal/semiconductor interfaces in organic field-effect transistors." Doctoral thesis, Università degli studi di Padova, 2007. http://hdl.handle.net/11577/3425125.

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The work presented in this thesis focuses on the investigation of two interfaces which play a crucial role in the physics of organic electronic devices: the dielectric/organic semiconductor and the organic semiconductor/metal ones. Regarding the dielectric/OS interface, we have deeply investigated the relationship between the SiO2 cleaning protocol or treatment and the electrical response of OFETs based on two PPV semiconducting polymers (MEH-PPV and OC1C10-PPV) and on a quarterthiopene derivative small molecule (DHCO-4T). Regarding the OS/metal interface, we investigated the electrical per

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Cera, Alexandre Manuel Gomes. "Certificados brancos para o caso português : análise económica e contributos para a sua aplicação e implementação." Master's thesis, FEUC, 2012. http://hdl.handle.net/10316/20102.

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Dissertação de mestrado em Gestão, apresentada à Faculdade de Economia da Universidade de Coimbra, sob a orientação de Patrícia Pereira da Silva e Nivalde José de Castro.<br>Dadas as preocupações ambientais e energéticas e os objetivos europeus estabelecidos para 2020, entre os quais o aumento em 20% da eficiência energética (EE), os decisores públicos procuram novos instrumentos que permitam alterar e/ou otimizar os padrões de consumo de energia do lado da procura. Um instrumento de política energética e de EE que tem ganho atenção dos decisores públicos são os Certificados Brancos (CBs)

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Pu, Zhengxiang. "A Dynamic Model of the Human/Cooling System/Clothing/Environment System." Doctoral diss., University of Central Florida, 2005. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/2077.

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The human body compensates well for moderate climatic heat stress, but artificial environments often block or overwhelm physiological defense mechanism. Personal protective equipment (PPE) is one of sources of heat stress. It protects individual from chemical, physical, or biological hazards, but the high thermal insulation and low vapor permeability of PPE may also lead to substantial heat stress. Personal cooling is widely used to alleviate heat stress, especially for those situations where ambient environmental cooling is not economically viable or feasible. It is important to predict the p

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Cossiello, Rafael Di Falco 1980. "Eletroluminescencia e morfologia de blendas polimericas : copolimeros ionicos de SAA e blendas com MEH-PPV." [s.n.], 2007. http://repositorio.unicamp.br/jspui/handle/REPOSIP/249467.

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Orientador: Teresa Dib Zambon Atvars<br>Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Quimica<br>Made available in DSpace on 2018-08-10T13:29:22Z (GMT). No. of bitstreams: 1 Cossiello_RafaelDiFalco_D.pdf: 19466365 bytes, checksum: 4613f44ad7300b66e793fa6de43b2c82 (MD5) Previous issue date: 2007<br>Resumo: O copolímero SAA (poli(estireno-co-ácido acrílico-co-1-metacrilato de pirenilmetila)) foi sintetizado por via radicalar em agua e caracterizado por analises termicas (DSC, TGA), espectroscopicas (NMR C e H, UV-VIS, FTIR, fluorescência estacionária e resolvida no tempo)

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Sarnecki, Greg. "Studies in soluble conjugated polymers." Thesis, University of Cambridge, 1994. https://www.repository.cam.ac.uk/handle/1810/272769.

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Halliday, David Alan. "The synthesis and characterisation of poly(p-phenylenevinylene)s." Thesis, University of Cambridge, 1992. https://www.repository.cam.ac.uk/handle/1810/272381.

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Sorce, Steven R. "The military housing problem Public Private Venture (PPV) and complete privatization alternatives /." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2000. http://handle.dtic.mil/100.2/ADA379322.

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Thesis (M.S. in Management) Naval Postgraduate School, June 2000.<br>Thesis advisor(s): Simon, Cary A.; . Eaton, Donald R. "June 2000." Includes bibliographical references (p. 73-74). Also available in print.

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Kuch, Serena [Verfasser], Matthias [Akademischer Betreuer] Rehahn, and Stefan [Akademischer Betreuer] Immel. "Neue PPV-Derivate auf ungewöhnlichen Wegen / Serena Kuch ; Matthias Rehahn, Stefan Immel." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2019. http://d-nb.info/1176702017/34.

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Faleiros, Marcelo Meira. "Espectroscopia ultrarrápida do polímero semicondutor luminescente MEH-PPV com excitação no ultravioleta." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/76/76132/tde-06122012-084909/.

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A indústria optoeletrônica passa por um período de transformação em que os materiais inorgânicos estão sendo substituídos pelos orgânicos, oligômeros e polímeros, na fabricação de alguns tipos de dispositivos. No entanto, fatores como baixa eficiência e tempo de vida impedem que os aparelhos com base nos polímeros entrem definitivamente no mercado. Para resolver estas questões, é necessário um conhecimento profundo da estrutura eletrônica desses materiais. Apesar do avanço científico, ainda existem pontos a esclarecer. Por exemplo, não existe um consenso sobre a natureza das excitações óticas

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Thamyongkit, Patchanita. "Synthesis and Characterization of Pyrazine and Phthalocyaninatonickel (II) Substituted PPV Analogous Oligomers." [S.l. : s.n.], 2002. http://www.bsz-bw.de/cgi-bin/xvms.cgi?SWB9909232.

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Martschick, Anja [Verfasser]. "Pathogenese und Prävention der Anthrazyklin-induzierten PPE : eine prospektive Studie / Anja Martschick." Berlin : Medizinische Fakultät Charité - Universitätsmedizin Berlin, 2010. http://d-nb.info/1024502171/34.

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Campos, Patrícia Bueno de. "Síntese e caracterização de derivados do poli(fenileno-vinileno) com diferentes massas molares." Universidade de São Paulo, 2003. http://www.teses.usp.br/teses/disponiveis/88/88131/tde-14112014-095557/.

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Os polímeros com propriedades luminescentes, e mais especificamente, os eletroluminescentes, tem atraído muita atenção devido a sua possível aplicação em dispositivos ópticos e eletrônicos do tipo LEDs (light-emitting diodes). Grande parte das pesquisas realizadas no campo da eletroluminescência se baseia em estudos sobre poli (arilenos-vinilenos), como o poli-(p-fenileno vinileno), PPV, e seus derivados. No processo de polimerização de tais polímeros, a influência de algumas variáveis são importantes em suas propriedades finais. Este trabalho descreve a exploração da influência de diversas va

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Mantip, Samuel Elias Lashat. "Molecular characterisation of peste des petits ruminants viruses in sheep and goats from Nigeria." Diss., University of Pretoria, 2013. http://hdl.handle.net/2263/40708.

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Peste des petits ruminants virus (PPRV) belongs to the family Paramyxoviridae and genus morbillivirus. It is a highly contagious, fatal and economically important viral disease of small ruminants that is still endemic and militate against the production of sheep and goats in Nigeria. It is a notifiable disease according to the World Organization for Animal Health (Office International des Epizooties). In this study, a molecular analysis of PPRV from sheep and goats from recent outbreaks across the different regions of Nigeria was carried out. The aim was to describe the viral strains and

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Faceto, Angelo Danilo. "Simulação dos processos de migração e relexação energética em sistemas orgânicos pi-conjugados emissores de luz." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/76/76131/tde-06092007-104908/.

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Neste trabalho, o método de Monte Carlo é utilizado para simular o processo de difusão espectral da excitação em um sistema polimérico emissor de luz. A metodologia utilizada incorpora a relaxação energética intramolecular, a migração de energia incoerente entre segmentos conjugados e o processo final que pode ser radiativo (luminescência) ou não-radiativo através de centros supressores da excitação (armadilhas ou defeitos). O principal objetivo é comparar os resultados da simulação e de experimentos envolvendo medidas de absorção, de excitação óptica e de luminescência realizadas no IFSC ao l

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Favarim, Higor Rogerio. "Estudo dos processos fotofísicos em heteroestruturas orgânicas que utilizam chaveamento de luz por fotoalinhamento molecular." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/76/76131/tde-13092007-171145/.

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O presente trabalho tem o objetivo de estudar os processos fotofísicos em filmes automontados de poli( -fenileno vinileno), ou PPV, sintetizados e processados no Grupo de Polímeros Prof. Bernhard Gross (GPBG) do IFSC, através dos processos de transferência de energia para o azocromóforo BY ou dentro da própria cadeia do PPV, através de um gradiente energético. O trabalho está focado no entendimento dos canais de relaxação energéticos, durante a difusão espectral, onde atuam o decaimento, radiativo e não radiativo. Pelo uso de uma engenharia molecular específica, propiciada pelo método de autom

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Fernandes, Mauro Roberto. "\"Síntese e caracterização espectroscópica de materiais orgânicos para eletrônica molecular\"." Universidade de São Paulo, 2002. http://www.teses.usp.br/teses/disponiveis/75/75132/tde-13042007-171301/.

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Este trabalho foi dividido em duas partes, sendo que na primeira (PARTE A) estão apresentadas as sínteses dos polímeros PPV, Cl-PPV, Br-PPV e dos co-polímeros (Cl-PPV)m / (PPV)n e (Br-PPV)m / (PPV)n nas seguintes relações m:n de 30:70; 50:50 e 70:30. Estes polímeros foram caracterizados por espectroscopia de infravermelho, UV-Visível e emissão de fluorescência. As modificações causadas nos polímeros, devido a dopagem com vapor de iodo e solução de cloreto férrico 0,12M em nitrometano também foram estudadas por estas mesmas técnicas. O acompanhamento da dopagem do PPV com vapor de iodo permitiu

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Chen, Chiung-Yun, and 陳瓊筠. "Dilute Solutions Properties of MEH-PPV/THF and MEH-PPV/Toluene." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/97196687059510559788.

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碩士<br>元智大學<br>化學工程與材料科學學系<br>94<br>We investigated the molecular conformation of poly[1-methoxy-4- (2’-ethyl- hexyloxy)-2,5-phenylene vinylene] (MEH-PPV) in tetrahydrofuran (THF) and toluene solutions using dynamic light scattering (DLS) and static light scattering (SLS). Moreover the solutions were freeze dried and the molecular conformations of MEH-PPV were observed by Transmission Electron Microscopy (TEM). From the results of light scattering, the second virial coefficient (A2) in THF is slightly negative and in toluene is positive. It revealed that toluene is a better solvent for MEH-PPV

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Qi, Dong Feng. "Photoluminescence from MEH-PPV and DP-PPV in bulk and encapsulated in porous alumina." Thesis, 2001. http://hdl.handle.net/2429/11797.

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Two PPV derivatives, MEH-PPV and DP-PPV, are encapsulated in the nanopores of anodized alumina with different pore sizes (50/200 nm) and depth (10/60 urn). Time-integrated and time resolved optical emission properties of these structures have been studied and compared with those of thin films of the polymers. Significant blue shifts of the PL spectra (0.034 eV-0.183 eV) are found in the porous materials as compared to the bulk. The relative intensity of the one-phonon assisted transition increases in comparison with the intensity of the no-phonon transition in the nanostructured samples.

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