Pump Probe Method
Mostrando 1-9 de 9 artigos, teses e dissertações.
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1. Evaluation of the Reflux Symptom Index and the Endolaryngeal Findings Scale after Treatment in Individuals with Laryngopharyngeal Reflux
Abstract Introduction Laryngopharyngeal reflux (LPR) is a prevalent condition in outpatients visiting the otorhinolaryngological clinic, with many controversies regarding its diagnosis and follow-up. Therefore, there is a need for clinical instruments that can diagnose individuals and monitor the results of their treatment. Objective To evaluate the appli
Int. Arch. Otorhinolaryngol.. Publicado em: 2021-01
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2. Espectroscopia ultrarrápida do polímero semicondutor luminescente MEH-PPV com excitação no ultravioleta / Ultrafast spectroscopy of the luminescent semiconducting polymer MEH-PPV with ultraviolet excitation
The optoelectronics industry is currently undergoing a transition period in which inorganic materials are being replaced by organic materials, oligomers and polymers, in the fabrication of some types of devices. However, factors such as low efficiency and low lifetime prevent polymer based devices on entering the market definitely. The solution of these issu
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/08/2012
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3. Fabricação de microeletrodos para aplicações em microscopia eletroquímica de varredura / Fabrication of microelectrodes for applications in scanning electrochemical microscopy
In this study, platinum microelectrodes were fabricated with a Micropipette Puller and used in Scanning Electrochemical Microscopy (SECM) to obtain information on the acid erosion of tooth enamel. The sealing and polishing of the active area of the fabricated devices are considered critical steps in the construction process, hence a vacuum pump was used to e
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/08/2011
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4. CHARACTERISATION OF ALLOPTICAL WAVELENGTH CONVERSION BY CROSS-GAIN MODULATION IN SEMICONDUCTOR OPTICAL AMPLIFIERS / CARACTERIZAÇÃO DA CONVERSÃO DE COMPRIMENTO DE ONDA POR MODULAÇÃO DE GANHO CRUZADO EM AMPLIFICADORES ÓPTICOS SEMICONDUTORES
Wavelength conversion of optical signals by all-optical techniques is an innovative and necessary technology for wavelength routed networks in the near future; the cross-gain modulation method is one of the simplest, in form, to attain this goal. Two categories of the main technique are presented: the classic, also known as pump and probe, and a novel one, n
Publicado em: 2005
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5. "Não linearidades ópticas em azocompostos" / Optical nonlinearities in azocompounds
This work reports on the temperature dependence of linear and nonlinear properties of azocompounds solutions due to isomerization mechanisms. The dependence of pipi* transitions on the linear structure of azocompounds is already noticeble in the measurements of absorption spectra as function of the temperature for the trans isomer. Knowing the energy levels
Publicado em: 2004
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6. Desenvolvimento de um medidor de debito cardiaco pelo metodo de termodiluição
The measurement of Cardiac Output is of great 1mportance for the functional evaluation of the clrculatory system. Together w1th other physiological parameters, such as pressure, heart rate, etc, it allows us to establish the circulatory system hemodynam1c working state. As a consequence, it helps on the adequate d1agnosis of the pathologies that affect the c
Publicado em: 1991
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7. Prognostic significance of left ventricular ejection fraction after acute myocardial infarction. A bedside radionuclide study.
The prognostic significance of left ventricular ejection fraction measurements obtained at the bedside was assessed in 171 patients as soon as possible after acute myocardial infarction. Ejection fraction was measured with a radionuclide first pass portable probe method within a mean of 24 hours of the onset of major symptoms. The results were related prospe
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8. Differential Effects of Nitrogen Limitation on Photosynthetic Efficiency of Photosystems I and II in Microalgae.
The effects of nitrogen starvation on photosynthetic efficiency were examined in three unicellular algae by measuring changes in the quantum yield of fluorescence with a pump-and-probe method and thermal efficiency (i.e. the percentage of trapped energy stored photochemically) with a pulsed photoacoustic method together with the inhibitor 3-(3,4-dichlorophen
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9. Echoventriculographic detection, localization, and quantification of left ventricular asynergy in acute myocardial infarction. A correlative echo- and electrocardiographic study.
"Echoventriculography", an echocardiographic method specially developed to scan the regional function of the left ventricle, is introduced for studying left ventricular wall motion alteration in patients with acute myocardial infarction. Purposeful probe directions, a 2:1 magnification, and careful adjustment of the gain and reject levels allowed a direct ec