Carbonyl Iron
Mostrando 1-12 de 60 artigos, teses e dissertações.
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1. Insights into cytochrome bc1 complex binding mode of antimalarial 2-hydroxy-1,4-naphthoquinones through molecular modelling
BACKGROUND Malaria persists as a major public health problem. Atovaquone is a drug that inhibits the respiratory chain of Plasmodium falciparum, but with serious limitations like known resistance, low bioavailability and high plasma protein binding. OBJECTIVES The aim of this work was to perform molecular modelling studies of 2-hydroxy-1,4-naphthoquinones
Mem. Inst. Oswaldo Cruz. Publicado em: 2017-04
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2. Measurements in an Outdoor Facility and Numerical Simulation of the Radar Cross Section of Targets at 10 GHz
Abstract This paper presents preliminary data from an ongoing study on the radar cross section (RCS) of targets with simple and complex surface geometries (a flat square plate, a 90° dihedral corner reflector and a retired air-to-air missile). Measurements and computer simulations of these metallic targets were carried out at 10 GHz and also when the surfac
J. Aerosp. Technol. Manag.. Publicado em: 2011-04
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3. Estudo da viabilização do uso da mistura híbrida ferrocarbonila / ferrita de NI0,5Zn0,5Fe2o4 como material absorvedor de radiação eletromagnética
Foram sintetizadas ferritas de NiZn no sistema Ni0,5Zn0,5Fe2O4, pelo método dos citratos precursores. A decomposição dos precursores foi estudada por análise termogravimétrica e espectroscopia na região do infravermelho na temperatura de 350C/3h. A evolução das fases formadas após calcinações a 350C/3h, 600, 1000 e 1100C/2h foi acompanhada por dif
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/08/2010
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4. Complex permeability and permittivity variation of carbonyl iron rubber in the frequency range of 2 to 18 GHz
Abstract: The complex dielectric permittivity (e) and magnetic permeability (m) of Radar Absorbing Materials (RAM) based on metallic magnetic particles (carbonyl iron particles) embedded in a dielectric matrix (silicon rubber) have been studied in the frequency range of 2 to 18 GHz. The relative permeability and permittivity of carbonyl iron-silicon composit
J. Aerosp. Technol. Manag.. Publicado em: 2010-04
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5. Microwave absorbing paints and sheets based on carbonyl iron and polyaniline: measurement and simulation of their properties
Abstract: This paper presents the processing and characterization of electromagnetic radiation absorbing paints and sheets based on magnetic and dielectric materials dispersed in polymeric matrices. Two different paint formulations containing carbonyl iron and/or polyaniline, using polyurethane as matrix, were prepared. Silicone sheets were also produced wit
J. Aerosp. Technol. Manag.. Publicado em: 2010-04
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6. Avaliação do estresse oxidativo em pacientes idosos com anemia ferropênica / Oxidative stress evaluation in old patients with iron deficiency anaemia
A deficiência de ferro é o resultado de um longo período de balanço negativo do ferro, culminando na exaustão do estoque de ferro do organismo. Isto é revelado quando a concentração de hemoglobina declina para valores abaixo dos limites normais e então aparece a anemia, que ocorre devido à deficiente síntese de hemoglobina, com diminuição da pro
Publicado em: 2009
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7. Deficiência de vitamina A altera o status de ferro e de estresse oxidativo em ratos / Deficiência de vitamina A altera o status de ferro e de estresse oxidativo em ratos
A vitamina A apresenta uma capacidade antioxidante direta in vitro, no entanto, sua ação antioxidante in vivo, assim como seu efeito sobre os biomarcadores de estresse oxidativo, ainda não são bem estabelecidos. Um mecanismo de ação antioxidante direto, no qual a vitamina A seria capaz de reduzir moléculas radicares ou formar um aduto com espécies ra
Publicado em: 2009
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8. CHEWABLE TABLETS OF CARBONYL IRON POWDER IN THE TREATMENT OF IRON DEFICIENCY ANEMIA IN CHILDREN UNDER SIX YEARS OF AGE / COMPRIMIDOS MASTIGÁVEIS DE FERRO CARBONILA PARA TRATAMENTO DA ANEMIA FERROPRIVA DE CRIANÇAS MENORES DE SEIS ANOS
The objective this study is verify the efficiency and occurrence of collateral effects with the use of carbonyl iron powder, in the form of chewable tablets, in order to enable the use of an alternative to the conventional treatment of iron deficiency anemia with ferrous sulfate, for children under 6 years of age. The intervention proposed for the treatment
Publicado em: 2006
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9. Suspensões magneto-reologicas de pos de ferro carbonilo : um estudo da influencia das propriedades magneticas e do tamanho das paritculas / Magneto-rheological suspensions: a study of the influence of the magnetic properties and particle size of carbonyl iron powder
The particle size distribution and magnetic susceptibility of some commercial carbonyl iron powders (code names CC, CS, HQ, OX and SM) were measured. The particle size of the powders increases as follows: HQ
Publicado em: 2005
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10. Efeito de flavonoides no eritrocito de individuos normais e portadores de anemia falciforme
Oxygen reactive species (ROS) are constantly formed in aerobic cells, particularly in the mithocondria and erythrocytes. These ROS, under normal conditions, are removed by an efficient antioxidant system composed by antioxidant enzymes, glutathione, vitamines and microelements. However, when the ROS production is higher than the antioxidant system capacity,
Publicado em: 2002
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11. Hepatic lipid peroxidation in vivo in rats with chronic iron overload.
Peroxidative decomposition of cellular membrane lipids is a postulated mechanism of hepatocellular injury in parenchymal iron overload. In the present study, we looked for direct evidence of lipid peroxidation in vivo (as measured by lipid-conjugated diene formation in hepatic organelle membranes) from rats with experimental chronic iron overload. Both paren
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12. Iron overload diminishes atherosclerosis in apoE-deficient mice
It has been proposed that elevated levels of tissue iron increase the risk for atherosclerosis, perhaps by favoring the formation of pro-atherogenic oxidized LDL. Working with apoE-deficient (apoE–/–) mice, which do not require a high-fat diet to develop atherosclerosis, we compared the effects of standard diet (0.02% iron) or a 2% carbonyl iron diet. Af
American Society for Clinical Investigation.