Encontrados 10 documentos, a visualizar página 1 de 1
Estimation of Hyperpolarizabilities of Organometallic Complexes by DFT
Mendes, Paulo J.; Silva, Tiago J. L.; Garcia, M. Helena; Ramalho, J. P. Prates; Carvalho, A. J. PalaceThe research of nonlinear optical (NLO) materials has grown in the past decades due to the potential application in optical device technology, like data storage, communication and bio-sensing. For obtaining large molecular second-order nonlinear optical (SONLO) responses, i.e. large hyperpolarizabilities (β), molecules have to possess typical “push-pull” asymmetric structures. η5- Monocyclopentadienylruthenium...
Benzo[c]thiophene Chromophores Linked to Cationic Fe and Ru Derivatives for NLO...
Silva, Tiago J. L.; Mendes, Paulo J.; Garcia, M. Helena; Robalo, M. Paula; Prates Ramalho, J. P.; Palace Carvalho, A. J.; Büchert, Marinaη5-Monocyclopentadienyliron(II)/ruthenium(II) complexes of the general formula [M(η5-C5H5)(PP)(L1)][PF6] {M = Fe, PP = dppe; M = Ru, PP = dppe or 2PPh3; L1 = 5-[3-(thiophen-2-yl)- benzo[c]thiophenyl]thiophene-2-carbonitrile} have been synthesized and studied to evaluate their molecular quadratic hyperpolarizabilities. The compounds were fully characterized by NMR, FTIR and UV/Vis spectroscopy and their Introduc...
Defining the structure of DPCA models and its impact on process monitoring and ...
Rato, Tiago J.; Reis, Marco S.Dynamic Principal Component Analysis (DPCA) is an extension of Principal Component Analysis (PCA), developed in order to add the ability to capture the autocorrelative behavior of processes, to the existent and well-known PCA capability for modeling cross-correlation between variables. The simultaneous modeling of the dependencies along the “variable” and “time” modes, allows for a more compact and rigorous des...
Architectures for Open Access Hotspots
António Rafael C. Paiva; Tiago J. Martins DuarteThis article envisages the study of wireless access points in an open access configuration. In this configuration, the users of the service have access to the network without the need of authentication and without accounting their access.Therefore, we intend to consider the particularities of an accessperspective of this kind. Various technological possibilities to the wireless access networ...
Modelação Numérica de Tensões Residuais de Origem Térmica
Freire, Tiago J.B. Martins GomesEsta Tese de Mestrado tem como principais objectivos prever as tensões residuais de origem térmica e relacionar este tipo de tensões com a vida à fadiga das peças onde estas estejam presentes. Como tal, procedeu-se a um ensaio experimental onde duas peças (uma de alumínio e outra de aço), concentricamente dispostas, com uma diferença de diâmetros mínima, foram aquecidas desde a temperatura ambiente até 450ºC. ...
Xylella fastidiosa gene expression analysis by DNA microarrays
Travensolo,Regiane F.; Carareto-Alves,Lucia M.; Costa,Maria V.C.G.; Lopes,Tiago J.S.; Carrilho,Emanuel; Lemos,Eliana G.M.Xylella fastidiosa genome sequencing has generated valuable data by identifying genes acting either on metabolic pathways or in associated pathogenicity and virulence. Based on available information on these genes, new strategies for studying their expression patterns, such as microarray technology, were employed. A total of 2,600 primer pairs were synthesized and then used to generate fragments using the PCR t...
Persistência do Canal Arterial: Casuística de uma Unidade de Cuidados Intensivo...
Andrade, H; Loureiro, C; Tiago, J; Henriques, R; Marinho da Silva, A; Rodrigues, D; Sá e Melo, A; Alves, RROBJECTIVES: This study took place at the Neonatal Intensive Care Unit (NICU) of the Dr Daniel de Matos Maternity Hospital and evaluated the incidence of patent ductus arteriosus (PDA), the clinical evolution of the newborns affected, the treatment prescribed, and associated morbidity and mortality. METHODS: We carried out a retrospective medical chart review of newborns admitted to the NICU between January 2001...
Composição química e atividade antioxidante do óleo volátil de Eupatorium polys...
Souza,Tiago J. T.; Apel,Miriam A.; Bordignon,Sérgio; Matzenbacher,Nelson Ivo; Zuanazzi,José Ângelo S.; Henriques,Amélia T.Os óleos voláteis das folhas e inflorescências de Eupatorium polystachyum DC. (Asteraceae), coletado no Rio Grande do Sul, Brasil, foram caracterizados por CG-EM e sua atividade antioxidante foi avaliada utilizando-se o método de DPPH. Foram obtidos rendimentos de 1,6 e 0,9% de óleo em relação às folhas e inflorescências frescas, sendo identificados 34 compostos, correspondendo a 99,1 e 99,5% do óleo volátil, r...
Estudo das alterações ultra-estruturais em pleura de ratos pós pleurodese por t...
Refosco,Tiago J.; Dutra,Isabela; Schneider,AirtonOBJETIVO: O talco é considerado um agente efetivo de pleurodese freqüentemente utilizado no tratamento de derrame pleural maligno. Entretanto, questiona-se sua segurança em relação à carcinogênese. O objetivo deste trabalho é descrever as alterações ultra-estruturais encontradas nas pleuras de ratos submetidos à pleurodese com talco buscando esclarecer sua segurança em relação à carcinogênese. MÉTODO: Neste est...
Performance of PSA and of PSA density in the diagnosis of prostate carcinoma
Martins,Antonio Carlos Pereira; Borelli- Bovo,Tiago J.; Reis,Rodolfo Borges dos; Paschoalin,Edson Luiz; Cologna,Adauto José; Suaid,Haylton JorgeOBJECTIVE: The aim of the study was to investigate the influence of the prostate volume and PSA density on the performance of total PSA to diagnosis of prostate carcinoma. METHODS: We analyzed 217 patients (PSA 0-10ng/ml) submitted to transrectal sextant prostate biopsy. Criteria for biopsy indication was PSA >2ng/ml and/or digital rectal exam suspicious of prostate cancer. RESULTS: Fifty five patients had pros...
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