Spectrometer Spectrum Analysis
Mostrando 1-12 de 15 artigos, teses e dissertações.
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1. Efeito fotoiniciador sobre propriedades físicas, mecânicas e térmicas de compósitos experimentais fotoativados por luz de lâmpada halógena e LEDs / Effect of the photo-initiator on physical, mechanics and thermal properties of experimental composites photo-activated for halogen lamp and LEDs
The aim of this study was to analyze the spectrum of different lightcuring units (LCUs) and photo-initiators and yours influence in the physical and thermal properties and bond strength (BS) of experimental resin composites with different photo-initiators. A blend with BisGMA, UDMA, BisEMA, TEGDMA and 65 wt% of silanated filler particles was prepared with CQ
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 05/08/2010
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2. DEVELOPMENT OF A GAMMA RAY SPECTROMETRY SOFTWARE FOR NEUTRON ACTIVATION ANALYSIS USING THE OPEN SOURCE CONCEP / Desenvolvimento de um software de espectrometria gama para análise por ativação com nêutrons utilizando o conceito de código livre
This study developed a specific software for gamma ray spectra analysis for researchers of the Neutron Activation Laboratory (LAN), which was named SAANI (Instrumental Neutron Activation Analysis Software). The LAN laboratory of the Institute for Research and Nuclear Energy (IPEN-CNEN/SP), uses a multielementar analytical technique, based on irradiation of a
Publicado em: 2008
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3. Caracterização de Ametistas Naturais
This research intends to investigate the formation of color in samples of natural amethyst from different origins after submitting them to gamma irradiation, as well to develop an identification method of uncolored crystals with potential for development of color. The techniques of infrared spectroscopy, ultraviolet-visible spectroscopy and atomic emission s
Publicado em: 2008
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4. Absortancia solar de superficies opacas : metodos de determminação e base de dados para tintas latex acrilica e PVA / Solar absorptance of opaque surfaces : a determination methods and data base for latex acrylic and PVA coatings
Solar radiation is the main responsible factor for the thermal load of buildings, and its impact over this load depends, mainly, on the solar absorptance of the building envelope. The lack of reliable and current data implies that researchers and specialists use visual perception or adopt tables based on surface colors to quantify the solar absorptance, whic
Publicado em: 2008
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5. Espectroscopia de fluorescência na detecção de lesões quimicamente induzidas por agente carcinogênico na borda lateral da língua-estudo in vivo / Fluorescence spectroscopy to detection of chemically induced lesion at the lateral vorder of the tongue - in vivo study.
The diagnostic validity of the fluorescence spectroscopy in the discrimination of induced lesions at lateral border of the tongue of hamsters was investigated in this study. The animal model using chemical induction with DMBA (dimethylbenzanthracene) was chosen for the carcinogenesis phases comparable to the ones observed at oral cancer development in humans
Publicado em: 2005
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6. Aplicabilidade de um espectrômetro portátil de CdTe e NaI (T1) para a medida da atividade de Césio-137 (137Cs) e Berílio-7 (7Be)
Neste trabalho foi estudada a aplicabilidade de um espectrômetro gama in situ (ROVER) de Amptek Inc., composto por um detector de Telureto de Cádmio (CdTe) de 3 mm x 3 mm x 1 mm e um detector de Iodeto de Sódio dopado com Tálio [NaI (Tl)] de 30 mm x 30 mm. As fontes radioativas usadas no trabalho foram tipo pastilha, seladas em alumínio e polietileno de
Publicado em: 2005
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7. Influencia do posicionamento e da largura de bandas de sensores remotos e dos efeitos atmosfericos na determinacao de indices de vegetacao / Influence of remote sensor band positioning and bandwidth and atmospheric efects on the vegetation index determinations
Investigou-se a influencia do posicionamento e da largura das bandas do Vermelho (V - 600 a 700 nm)e do Infravermelho proximo (IVP - 750 a 1100 nm), assim como a influencia da atmosfera, na determinacao dos indices de vegetacao (IVs)NDVI, SAVI e ARVI, obtidos a partir de dados hiperespectrais do sensor Airborne Visible/InfraRed Imaging Spectrometer (AVIRIS).
Publicado em: 2000
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8. Influencia do posicionamento e da largura de bandas de sensores remotos e dos efeitos atmosfericos na determinacao de indices de vegetacao / Influence of remote sensor band positioning and bandwidth and atmospheric efects on the vegetation index determinations
Investigou-se a influencia do posicionamento e da largura das bandas do Vermelho (V - 600 a 700 nm)e do Infravermelho proximo (IVP - 750 a 1100 nm), assim como a influencia da atmosfera, na determinacao dos indices de vegetacao (IVs)NDVI, SAVI e ARVI, obtidos a partir de dados hiperespectrais do sensor Airborne Visible/InfraRed Imaging Spectrometer (AVIRIS).
Publicado em: 2000
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9. Rapid, sensitive analysis of protein mixtures by mass spectrometry.
We have developed a method for determining the molecular masses of proteins in complex mixtures by mass spectrometry. The method has the capacity to examine the components of mixtures without using any chromatographic separation steps and will tolerate relatively large amounts of buffers and inorganic contaminants. It allows the simultaneous determination of
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10. Detection and selective dissociation of intact ribosomes in a mass spectrometer
Intact Escherichia coli ribosomes have been projected into the gas phase of a mass spectrometer by means of nanoflow electrospray techniques. Species with mass/charge ratios in excess of 20,000 were detected at the level of individual ions by using time-of-flight analysis. Once in the gas phase the stability of intact ribosomes was investigated and found to
The National Academy of Sciences.
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11. NMR data collection and analysis protocol for high-throughput protein structure determination
A standardized protocol enabling rapid NMR data collection for high-quality protein structure determination is presented that allows one to capitalize on high spectrometer sensitivity: a set of five G-matrix Fourier transform NMR experiments for resonance assignment based on highly resolved 4D and 5D spectral information is acquired in conjunction with a sin
National Academy of Sciences.
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12. Characterization of Bacteria by Particle Beam Mass Spectrometry
A technique is described for detecting and characterizing bacteria on a single-particle basis by mass spectrometry. The method involves generation of a particle beam of single whole cells which are rapidly volatilized and ionized in vacuum in the ion source of a quadrupole mass spectrometer. The particle beam can be generated, with minimal sample handling, f