Attenuation Map
Mostrando 1-12 de 34 artigos, teses e dissertações.
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1. Realistic deformable 3D numeric phantom for transcutaneous ultrasound
Abstract Introduction Numerical phantoms are important tools to design, calibrate and evaluate several methods in various image-processing applications, such as echocardiography and mammography. We present a framework for creating ultrasound numerical deformable phantoms based on Finite Element Method (FEM), Linear Isomorphism and Field II. The proposed met
Res. Biomed. Eng.. Publicado em: 16/03/2017
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2. Assessment of cumulative damage by using ultrasonic C-scan on carbon fiber/epoxy composites under thermal cycling
In recent years, structural composites manufactured by carbon fiber/epoxy laminates have been employed in large scale in aircraft industries. These structures require high strength under severe temperature changes of -56° until 80 °C. Regarding this scenario, the aim of this research was to reproduce thermal stress in the laminate plate developed by temper
Materials Research. Publicado em: 19/06/2012
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3. Cardiac and renal effects induced by different exercise workloads in renovascular hypertensive rats
We examined the effect of exercise training (Ex) without (Ex 0%) or with a 3% workload (Ex 3%) on different cardiac and renal parameters in renovascular hypertensive (2K1C) male Fisher rats weighing 150-200 g. Ex was performed for 5 weeks, 1 h/day, 5 days/week. Ex 0% or Ex 3% induced similar attenuation of baseline mean arterial pressure (MAP, 119 ± 5 mmHg
Brazilian Journal of Medical and Biological Research. Publicado em: 2011-06
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4. Optimization proposal of a transmission antenna allocation in rural areas / Proposta de otimização da alocação da antena de transmissão em região rural
O desenvolvimento tecnológico alcançado pela ciência tem permitido ao homem vencer as barreiras geográficas, especialmente no aspecto que se refere às comunicações. Para a realização de tal proeza, importante papel foi desempenhado pelas telecomunicações. Na atualidade, mais limites continuam a ser vencidos e o desenvolvimento das telecomunicaçõ
Publicado em: 2006
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5. Acute effect of amiodarone on cardiovascular reflexes of normotensive and renal hypertensive rats
The aim of the present study was to evaluate the effect of amiodarone on mean arterial pressure (MAP), heart rate (HR), baroreflex, Bezold-Jarisch, and peripheral chemoreflex in normotensive and chronic one-kidney, one-clip (1K1C) hypertensive rats (N = 9 to 11 rats in each group). Amiodarone (50 mg/kg, iv) elicited hypotension and bradycardia in normotensiv
Brazilian Journal of Medical and Biological Research. Publicado em: 2005-06
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6. The attenuation of concentrations model: a new method for assessing mercury mobility in sediments
In this work we propose a new approach for the determination of the mobility of mercury in sediments based on spatial distribution of concentrations. We chose the Tainheiros Cove, located in the Todos os Santos Bay, Brazil, as the study area, for it has a history of mercury contamination due to a chloro-alkali plant that was active during 12 years. Twenty-si
Química Nova. Publicado em: 2004-02
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7. Industrial applications of plasma focus radiation
Applications of a small-chamber Plasma Focus used as portable radiation generator is presented. The device was designed to maximize the fluence. The mean neutron yield was 3 x 10(8) neutrons of 2.45 MeV per shot, corresponding to a 10(6) neutrons/cm² fluence on the external surface of the chamber. A technique to detect the presence of water in the neighborh
Brazilian Journal of Physics. Publicado em: 2002-03
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8. Uso de imagens Radarsat-1 para fins de mapeamento de uso da terra e cobertura do solo em ambiente tropical úmido urbano: o caso de Manaus, Estado do Amazonas. / Use of radarsat-1 data in the identification of targets related to land use and land cover in urban humid tropical region: the case of Manaus, state of the Amazon, Brazil
The use of remote sensing data acquired through Synthetic Aperture Radar has been a recent common trend for land use and land cover mapping purposes. The information derived from this kind of data has been applied to distinct related application fields, such as: urban pattern analysis and mapping, settlements identification, urban change detection and even m
Publicado em: 2002
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9. Genetic analysis of the attenuation phenotype of poliovirus type 1.
Seven different recombinant viruses from the virulent Mahoney and the attenuated Sabin parental strains of type 1 poliovirus were constructed in vitro by using infectious cDNA clones. Monkey neurovirulence tests (lesion score, spread value, and incidence of paralysis) using these recombinant viruses revealed that the loci influencing attenuation were spread
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10. Complex transcriptional regulation of myc family gene expression in the developing mouse brain and liver.
myc family genes (c-, N-, and L-myc) have been shown to be differentially expressed with respect to tissue type and developmental stage. To define and compare the regulatory mechanisms governing their differential developmental expression, we examined the transcriptional regulation of each myc family member during murine postnatal brain and liver development
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11. Activation of Phosphotyrosine Phosphatase Activity Attenuates Mitogen-Activated Protein Kinase Signaling and Inhibits c-FOS and Nitric Oxide Synthase Expression in Macrophages Infected with Leishmania donovani
Intracellular protozoan parasites of the genus Leishmania antagonize host defense mechanisms by interfering with cell signaling in macrophages. In this report, the impact of Leishmania donovani on mitogen-activated protein (MAP) kinases and nitric oxide synthase (NOS) expression in the macrophage cell line RAW 264 was investigated. Overnight infection of cel
American Society for Microbiology.
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12. Protein-Protein Interactions in the Yeast Pheromone Response Pathway: Ste5p Interacts with All Members of the Map Kinase Cascade
We have used the two-hybrid system of Fields and Song to identify protein-protein interactions that occur in the pheromone response pathway of the yeast Saccharomyces cerevisiae. Pathway components Ste4p, Ste5p, Ste7p, Ste11p, Ste12p, Ste20p, Fus3p and Kss1p were tested in all pairwise combinations. All of the interactions we detected involved at least one m