Spectral Enhancement
Mostrando 1-12 de 30 artigos, teses e dissertações.
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1. Serum iron and vitamin B 12 deficiency could indicate celiac disease by flexible spectral imaging color enhancement
RESUMO INTRODUÇÃO A doença celíaca (DC) é uma doença autoimune que pode ter seu diagnóstico atrasado devido à presença de casos atípicos e assintomáticos na idade adulta. Neste trabalho, objetivamos estudar a frequência de DC e avaliar se as técnicas de endoscopia magnificada e magnificada/Fice (flexible spectral imaging color enhancement) con
Rev. Assoc. Med. Bras.. Publicado em: 2020-06
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2. HOTSPOT STABILIZATION OF GOLD NANOPARTICLES FOR APPLICATION OF QUANTITATIVE SERS IN BIOANALYTICAL SYSTEMS
A complete procedure including synthesizing gold nanoparticles and further hotspots stabilization is presented. Colloidal gold synthesis followed a citrate reducing reaction, then, an ideal condition for SERS enhancement with quantitative purposes was reached by searching equilibrium between salt- and analyte-induced aggregation. Under this condition, a mild
Quím. Nova. Publicado em: 05/12/2019
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3. Silicon Nanostructuring Using SF6/O2 Downstram Plasma Etching: Morphological, Optical and Sensing Properties
Silicon (Si) nanostructures were prepared in the downstream of radiofrequency SF6/O2 mixture plasma generated in 13.56 MHz hollow cathode discharge system. Depending on the oxygen percentage in the mixture, the obtained Si nanostructures were characterized for their different properties: etching rate, morphology, optical reflectance, photoluminescence, spect
Mat. Res.. Publicado em: 10/07/2018
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4. Resonant properties, of modified triangular plasmonic nanoparticles with higher field concentration
In this paper, we present an analysis of the resonant response of modified triangular metallic nanoparticles with polynomial sides. The particles are illuminated by an incident plane wave and the method of moments is used to solve numerically the electromagnetic scattering problem. We investigate spectral response and near field distribution in function of t
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2013-12
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5. Rastreamento do câncer de esôfago pela endoscopia digestiva transnasal e cromoendoscopia em pacientes com carcinoma de células escamosas de cabeça e pescoço
Introdução: O câncer de esôfago usualmente é detectado em estágio avançado, impossibilitando tratamento curativo. Consumo de álcool e tabaco e história pessoal de carcinoma de células escamosas de cabeça e pescoço (CCECP) são os principais fatores associados ao desenvolvimento do carcinoma de esôfago. Endoscopia transnasal (ETN) é praticada ro
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/11/2011
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6. Influência de combinações de diferentes caotrópicos no espectro visível da hemoglobina e na estabilidade de membrana de eritrócitos humanos / Influence of combinations of different chaotropes in the visible spectrum of hemoglobin
CHAPTER II: This study aimed to investigate the influence of combinations of urea, ethanol and hypotonicity on the stability and spectrum of human hemoglobin. Protocols with fixed incubation time of 30 minutes at 37 C were used to analyze the spectra of commercial hemoglobin and hemoglobin of venous blood obtained from 20 healthy volunteers. The visible spec
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/01/2011
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7. Análise de métodos de realce espectral e temporal aplicados à discriminação de classes de uso e cobertura da terra em áreas de Cerrado / Analysis methods of spectral and temporal enhancement applied to class discrimination use and land cover in areas Closed
O bioma Cerrado tem destaque nacional e internacional em virtude de sua dimensão, cerca de 205 milhões de hectares do território, além de se destacar como uma das áreas de importância global para a biodiversidade. Com 9,2% de sua área assegurada na forma de parque ou reserva ecológica, estudos do mapeamento da cobertura vegetal apontam um cenário de
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 11/03/2010
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8. Comparative analysis of circular and triangular gold nanodisks for field enhancement applications
In this paper, we present a quantitative comparison of circular and triangular gold nanodisks with the same length and thickness. The method of moments is used to solve numerically the scattering problem. With this model, we investigate the spatial near field distribution, spectral response, far field diagrams, and bandwidth wavelength of these particles. Ou
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2010-12
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9. Análise de métodos de realce espectral e temporal aplicados à discriminação de classes de uso e cobertura da terra em áreas de Cerrado / Analysis methods of spectral and temporal enhancement applied to class discrimination use and land cover in areas Closed
O bioma Cerrado tem destaque nacional e internacional em virtude de sua dimensão, cerca de 205 milhões de hectares do território, além de se destacar como uma das áreas de importância global para a biodiversidade. Com 9,2% de sua área assegurada na forma de parque ou reserva ecológica, estudos do mapeamento da cobertura vegetal apontam um cenário de
Publicado em: 2010
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10. Re(I) complexes and TiO2 films in photoinduced molecular devices / Complexos de Re(I) e filmes de TiO2 em dispositivos moleculares fotoinduzidos
The thesis focus on two main topics: characterization of TiO2 films for Dye-sensitized solar cells, DSCs, and investigation on photochemical and photophysical properties of Re(I) polypyridyl complexes. Mesoporous TiO2 films were prepared by sol-gel method and by commercial oxide (P25, Degussa) and were characterized by XRD, SEM, B.E.T. and XPS. Both oxides w
Publicado em: 2009
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11. Processing and characterization of fully and partial nanostructured alumina powders and ceramics / Processamento e caracterização de pós e de cerâmicas de alumina total e parcialmente nanoestruturadas
The opportune access to trustworthy agricultural information has become very important for the decision process of national and international agents. The use of remote sensing to map agricultural crops must consider their high dynamism, therefore the use of methods that consider their spectral-temporal profile is needed. The Mato Grosso State Brazil became o
Publicado em: 2007
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12. Caracterização fisica de ambientes carsticos atraves de sensoriamento remoto e SIG : o caso do Parque Nacional Cavernas do Peruaçu - Januaria/ Itacarambi, MG / Characterization of karstic environments by means of remote sensing and GIS : the case of Cavernas do Peruaçu National Park, Januaria/ Itacarambi, Minas Gerais State, Brazil
This dissertation deals with the characterization of karstic environments through the use of remote sensing and GIS techniques, using as a case study the Cavernas do Peruaçu National Park, located in Januária and Itacarambi counties, Minas Gerais State, Brazil. The selection of this area was due to its relevance in terms of the speleological, archeological
Publicado em: 2007