High Energy Photons
Mostrando 1-12 de 35 artigos, teses e dissertações.
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1. Influence of High Light Intensity and Nitrate Deprivation on Growth and Biochemical Composition of the Marine Microalgae Isochrysis galbana
Abstract Isochrysis galbana is a brown microalgae widely used as a feed for marine organism in aquaculture. The aim of present study is to investigate the growth, biochemical composition, fatty acid profile, photosynthetic parameters and antioxidant activity (radical scavenging activity) of Isochrysis galbana cells cultivated under different levels (sub-opti
Braz. arch. biol. technol.. Publicado em: 20/12/2019
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2. Monochromatic double coloring effect on V2O5 thin films deposited by electron beam
ABSTRACT Electrochromic material is a thin film technology that has a close relationship with environmental sustainability since they can control the light and heat that enter and leave a building. Vanadium oxide films are electrochemically active for lithium and electron co-intercalation, presenting low optical variation in the low energy visible light, whi
Matéria (Rio J.). Publicado em: 25/11/2019
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3. Espectroscopia óptica de baixo custo: uma estratégia para a introdução de conceitos de física quântica no ensino médio
Resumo Neste artigo, reportamos a confecção e discutimos a aplicabilidade de um espectrômetro óptico de baixo custo como recurso didático para a introdução de conceitos de Física Quântica no ensino médio. O protótipo foi desenvolvido usando grade de difração comercial, lentes convergentes (lupas), webcam e o software Tracker para extração dos
Rev. Bras. Ensino Fís.. Publicado em: 29/04/2019
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4. Evaluation of the scattered radiation components produced in a gamma camera using Monte Carlo method
INTRODUCTION: This paper presents a simulation for evaluation of the scattered radiation components produced in a gamma camera PARK using Monte Carlo code SIMIND. It simulates a whole body study with MDP (Methylene Diphosphonate) radiopharmaceutical based on Zubal anthropomorphic phantom, with some spinal lesions. METHODS: The simulation was done by comparin
Rev. Bras. Eng. Bioméd.. Publicado em: 2014-06
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5. Avaliação de dosímetros termoluminescentes para uso em radioterapia com fótons de alta energia / Evaluation of thermoluminescent dosimeters for using in radiotherapy with high energy photons
Atualmente a maior parte dos tratamentos radioterápicos é feita através de irradiações com feixes de fótons de alta energia. Esses feixes se originam em fontes radioativas (de nuclídeos como o cobalto 60) ou são gerados em aceleradores lineares de elétrons. Para as medidas dosimétricas nesses feixes, uma das técnicas mais utilizada é a termolumin
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/08/2011
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6. Aplicabilidade e validação do Geant4 para fótons e elétrons em radioterapia / GEANT4 applicability and validation to Photons and Electrons in Radiotherapy
Due to the increasing use of ionizing radiation in medical applications, in recent decades, the simulation codes for radiation interacting with matter, based on Monte Carlo Method, have been constantly adapted to applications in medical physics. TheMonte Carlo method is a statisticalmethod of numerical simulation of problems using essentially a sequence of r
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/06/2011
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7. Emissão laser em meios espalhadores com ganho: estudos experimentais em soluções etanóicas e aquosas
The approach of this thesis is study the laser emission from highly scattering media with gain with incoherent feedback. These systems are called of random lasers and diverge from the typical laser, because they can emit monochrome light with high intensity without a cavity. We detail several experimental studies in samples containing different rhodamines in
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/01/2009
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8. Análise multi-espectral dos eventos cíclicos de Carinae / Multi-spectral analysis of the cyclic events of Eta Carinae
In this thesis, a multi-wavelength study on the cyclic events of Eta Carinae was performed. The presence of a hole in the polar region of the Homunculus was confirmed by the velocity maps of the [Fe II] 12567 line. The blue-shifted component of the He I 10830, detected towards the NW lobe, was mapped and it is in the equatorial plane. It was observed that wi
Publicado em: 2009
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9. What are the high energy cosmic rays telling us?
We review in these notes the recent results of the Pierre Auger Observatory related to ultra high energy cosmic rays. We describe the components of the observatory and the status of its operation. The observations related here cover the correlation with astrophysical sources and its implications, as well as the determination of the spectrum at the higher end
Brazilian Journal of Physics. Publicado em: 2008-09
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10. Simulações do ruído de fundo instrumental e reconstrução de imagens do experimento protoMIRAX / Simulations of the instrumental background and image reconstruction of the protoMIRAX experiment
In this thesis, the results of detailed and realistic simulations performed with a Monte Carlo simulation code for gamma-ray Astronomy (MGGPOD) to predict the response of protoMIRAX are presented. The protoMIRAX is a project under development by the High Energy Astrophysics group of INPE, in which a hard X-ray camera is being built based on the coded apertur
Publicado em: 2008
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11. PREPARATION OF LYOPHILIZED KIT OF HYNIC-[Tyr3]-OCTREOTATE AND LABELING STUDIES WITH 99m-TECHNETIUM / Preparo do reagente liofilizado HYNIC-[Tyr3]-Octreotato e estudo de marcação com Tecnécio-99m
The development of radiolabeled molecules with high specificity for an organ or tumor has been contributed to the precise diagnostic in nuclear medicine. Somatostatin labeled derivatives constitutes a particular example of labeled peptide applied in the localization of neuroendocrine tumors. Nowadays, the 111In-DTPA-octreotideo is the radiopharmaceutical app
Publicado em: 2008
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12. Ferrous Xylenol Gel measurements for 6 and 10 MV photons in small field sizes
The Fricke dosimeter is a ferrous sulfate aqueous solution that, when irradiated, oxidizes the Fe2 + ions to Fe3 + . This new concentration, generally determined through spectrophotometry, is directly proportional to the ionizing radiation absorbed energy. The Fricke Xylenol Gel dosimeter (FXG) was developed through the incorporation of swine skin gelatin an
Brazilian Journal of Physics. Publicado em: 2007-09