Fluorescence Detectors
Mostrando 1-12 de 20 artigos, teses e dissertações.
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1. Gas-Phase Polycyclic Aromatic Hydrocarbons in the Parking Lot Impacted by Light-Duty Vehicles Burning Gasoline and Ethanol Blends
In order to study the emission of vapor-phase polycyclic aromatic hydrocarbons (PAHs) by light-duty vehicles burning gasoline and ethanol blends, air samplings were performed at a parking lot in Londrina, PR, Brazil. The samples were obtained during the summer and winter 2012. The semi-volatile PAHs were collected using a cartridge packed with XAD-2 resin, e
J. Braz. Chem. Soc.. Publicado em: 2016-09
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2. Desenvolvimento de um simulador para espectrometria por fluorescência de raios X usando computação distribuída / Development of a X-ray fluorescence spectrometry simulator using distributed computing
Radiation Physics is a branch of Physics that is present in various studying areas and relates to the concept of spectrometry. Among the numerous existing spectrometry techniques, there is the X-ray fluorescence spectrometry. It also has a range of variations which can emphasize a particular subset of techniques. The production of X-ray fluorescence enables
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/03/2012
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3. MODELING OF THE CARDIAC ELECTRODYNAMICS AND OF THE EFFECTS OF SPATIAL AND TIME RESOLUTION ON OPTICAL MAPS / MODELAGEM DA ELETRODINÂMICA CARDÍACA E DOS EFEITOS DA RESOLUÇÃO ESPACIAL E TEMPORAL EM MAPAS ÓPTICOS
Fluorescence studies using potentiometric dyes to optically measure the action potential of cardiac cells constitute an important tool to better understand the electrophysiology of the heart. However, in many experimental setups, the finite sensing area of optical detectors cannot be neglected. As a consequence, the detected fluorescence signal may effective
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 07/02/2011
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4. Caracterização química elementar e identificação de fontes de obsidianas utilizando fluorescência de raios X com equipamento portátil (PXRF)
The study of archaeological and cultural heritage artifacts by means of analytical techniques with portable equipment has become increasingly routinely today. Various types of portable EDXRF equipment have been used in many different situations involving in situ analysis covering a wide range of geometries, detectors, current and voltage applied in the X-ray
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/03/2010
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5. Stability of arsenic species in biological samples by coupling liquid chromatography or capillary electrophoresis with atomic detectors / Estabilidade de espécies de arsênio em amostras biológicas acoplando cromatografia líquida ou eletroforese capilar com detectores atômicos
Neste projeto foram abordados procedimentos analíticos para extração, separação e identificação de espécies de arsênio encontradas normalmente em quantidades de traços e ultra-traços em amostras biológicas e ambientais. Entre as amostras alvo deste estudo, teve-se alimentos de origem marinha como por exemplo camarão. Foi avaliada a estabilidade
Publicado em: 2010
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6. Avaliação dos efeitos da radiação ionizante em materiais utilizados em restaurações dentárias / EVALUATION OF EFFECTS OF IONIZING RADIATION ON MATERIALS USER IN DENTAL RESTORATIONS.
This work consisted of quantitative studies of the effects caused by ionizing radiation on materials used in dental restorations (Titanium, Amalgam, Resin Composite and Glass Ionomer) aiming the deleterious effects of radiotherapy when patients with tumors in head and neck, arising when the teeth are restored within in the field of radiation. Samples were su
Publicado em: 2009
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7. Characterization of cadmium and zinc telluride (CZT) and pin type silicon (Si-Pin) photodiode detectors for x-ray spectrometry / Characterization of cadmium and zinc telluride (CZT) and pin type silicon (Si-Pin) photodiode detectors for x-ray spectrometry / CaracterizaÃÃo dos detectores de telureto de cÃdmio e zinco (CZT) e fotodiodo de silÃcio tipo pin (Si-PIN) para a espectrometria de raios-x / CaracterizaÃÃo dos detectores de telureto de cÃdmio e zinco (CZT) e fotodiodo de silÃcio tipo pin (Si-PIN) para a espectrometria de raios-x
A detailed understanding of X-ray spectrum is essential for analyzing equipment that emits this kind of radiation in radiodiagnostic facilities. Information on the various parameters that are contained in this spectrum is important for quality control of X-ray equipment. Spectrometry of X-ray beams uses very often GeHP detectors, that have good detection eff
Publicado em: 2008
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8. Detection of ultra high-energy tau-neutrinos with fluorescence detectors
We calculate the possible number of Extensive Air Showers originated by tau neutrinos in Fluorescence Detectors like the ones of the Pierre Auger Observatory. We consider models of production of electron and muon neutrinos in extra galactic objects and Topological Defects, as well as the possibility of neutrino flavor change in the propagation of the neutrin
Brazilian Journal of Physics. Publicado em: 2007-07
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9. Development of analytical strategies for the determination of the anti-hypertensive furosemide / Desenvolvimento de estratégias analíticas para determinação do anti-hipertensivo furosemida
The development and application of different procedures for the quantification of the drug furosemide, exploiting its reactions and physical properties are described. The presented methods were based in static and flow injection procedures. Among the static redox procedures titrimetry was applied, which exploited the hydrolysis and oxidation reactions of thi
Publicado em: 2007
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10. Desenvolvimento de cristais baseados em iodeto de Césio para aplicação como detectores de radiação / Development of crystals based in cesium iodide for application as radiation detectors
Cintiladores inorgânicos com tempo de decaimento de luminescência rápido, densidade alta e boa produção de luz têm sido objeto de estudos para aplicações em física nuclear, física de energias altas, tomografia nuclear e outros campos da ciência e da engenharia. Cristais de cintilação baseados em iodeto de césio (Csl) são materiais que apresent
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 07/06/2006
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11. First results from the Pierre Auger Observatory
We review in these notes the status of the construction of the Pierre Auger Observatory and present the first Physics results, based on the data collected during the first year and a half of operation. These results are preliminary, once the work to understand the systematics of the detectors are still underway. We discuss the cosmic ray spectrum above 3 EeV
Brazilian Journal of Physics. Publicado em: 2006-12
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12. Detection of ultra high energy Tau neutrinos in fuorescence detectors / Detecção de neutrinos do Tau de altissimas energias em detetores de fluorescencia
Fazemos uma estimativa do número de Chuveiros Atmosféricos Extensos originados por neutrinos do tau em Detetores de Fluorescência como os do Observatório Pierre Auger. Consideramos modelos de produção de neutrinos do elétron e do múon de altíssimas energias em objetos extra galácticos e Defeitos Topológicos, assim como mudança de sabor na propaga
Publicado em: 2006