Fine Particle Systems
Mostrando 1-10 de 10 artigos, teses e dissertações.
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1. Evaluation of the anisotropy field for fine-particle systems from low-field thermomagnetic curves
A method for evaluating the temperaturedependent magnetic anisotropy field from thermomagnetic curves for Stoner–Wohlfarth-like systems is proposed. It allows the anisotropy parameters of a sample with unknown spontaneous magnetization to be obtained by using magnetic fields considerably lower than the anisotropy field.
Publicado em: 2011
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2. Interaction fields evaluation in fine particle systems
A computer simulation model for estimation of the interaction fields in fine particle systems has been developed. The method uses the experimental 8Mα(H) plot, constructed from the Fourier description of the initial magnetization curve and the hysteresis loop, and the 8M(H) plot, obtained from the remanence curves. The dependencies of the interaction fields
Publicado em: 2011
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3. Project and assembling of pneumatic transport pilot unit in diluted phase for studying the relationship between the pressure drop and the distribution of granular particles into the cross section of industrial pipes / Projeto e montagem de unidade piloto de transporte pneumatico em fase diluida para estudo da relação entre a perda de carga e a distribuição de particulas granulares na seção transversal de dutos industriais
The pneumatic transport that involves the use of air particles to move materials through pipes is a major operation in various industries and chemical processes. Typical examples are systems for the conversion of energy from coal, catalytic cracking, drying and transport of solid and fine granular. The conventional pneumatic transport is often operated in di
Publicado em: 2009
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4. Micropartículas poliméricas à base de xilana e Eudragit S-100 contendo mesalazina visando à liberação cólon-específica
Colon-specific drug delivery systems have attracted increasing attention from the pharmaceutical industry due to their ability of treating intestinal bowel diseases (IBD), which represent a public health problem in several countries. In spite of being considered a quite effective molecule for the treatment of IBD, mesalazine (5-ASA) is rapidly absorbed in th
Publicado em: 2009
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5. Immobilization of proteins onto polysaccharide surfaces / Imobilização de proteínas sobre superfícies de polissacarídeos
This thesis presents the study on thin film formation and characterization of xyloglucans extracted from two different sources, Hymenaea courbaril (HXG) and Tamarindus indica (TXG) onto Si/SiO2 wafers or amino-terminated wafers, as well as the application of these films as substrates for the immobilization of the lectin concanavalin A (Con A) by means of ell
Publicado em: 2008
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6. 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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7. The Abbreviated Impactor Measurement (AIM) Concept: Part 1—Influence of Particle Bounce and Re-Entrainment—Evaluation with a “Dry” Pressurized Metered Dose Inhaler (pMDI)-Based Formulation
The abbreviated impactor measurement concept is a potential improvement to the labor-intensive full-resolution cascade impactor methodology for inhaler aerosol aerodynamic particle size distribution (APSD) measurement by virtue of being simpler and therefore quicker to execute. At the same time, improved measurement precision should be possible by eliminatin
Springer US.
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8. Stability of Coulomb systems in a magnetic field.
I study N electrons and M protons in a magnetic field. It is shown that the total energy per particle is bounded below by a constant independent of M and N, provided the fine structure constant is small. Here, the total energy includes the energy of the magnetic field.
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9. The Abbreviated Impactor Measurement (AIM) Concept: Part II—Influence of Evaporation of a Volatile Component—Evaluation with a “Droplet-Producing” Pressurized Metered Dose Inhaler (pMDI)-Based Formulation Containing Ethanol as Cosolvent
The abbreviated impactor measurement (AIM) concept is a potential solution to the labor-intensive full-resolution cascade impactor (CI) methodology for inhaler aerosol aerodynamic particle size measurement. In this validation study, the effect of increasing the internal dead volume on determined mass fractions relating to aerodynamic particle size was explor
Springer US.
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10. In vivo and in vitro gene transfer to mammalian somatic cells by particle bombardment.
Chimeric chloramphenicol acetyltransferase and beta-galactosidase marker genes were coated onto fine gold particles and used to bombard a variety of mammalian tissues and cells. Transient expression of the genes was obtained in liver, skin, and muscle tissues of rat and mouse bombarded in vivo. Similar results were obtained with freshly isolated ductal segme