Magnetic Fluids
Mostrando 25-36 de 57 artigos, teses e dissertações.
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25. Synthesis and characterization of sililca coated nanoparticles functionalized with anime groups / Síntese e caracterização de nanopartículas de maguemita recobertas com sílica funcionalizada com grupos amina
Magnetic nanoparticles coated with several kinds of materials have been the focus of intense research due to their potential applications in biomedicine. This type of material contains a magnetic core that is involved by a shell of different composition. The coating of magnetic nanoparticles with amino-functionalized silica is particularly important because
Publicado em: 2008
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26. Extração sortiva em barra de agitação para análise de fármacos em fluidos biológicos
A novel solventless sample preparation, stir-bar sorptive extraction (SBSE), for extraction, and sample enrichment of organic compounds from biological fluids, is described in this manuscript from principle to applications. The SBSE is based on sorptive extraction, whereby the compounds are extracted into a polymer coating, polydimethylsiloxane (PDMS), on a
Química Nova. Publicado em: 2008
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27. Avaliação morfológica de baço, linfonodo e fígado de macacos-prego cebus apella tratados com nanopartículas magnéticas recobertas com DMSA
Magnetic fluids (MF) are colloidal suspensions formed by magnetic iron oxide nanoparticles (MNPs) such as magnetite (Fe3O4) and maghemite ( Fe2O4), dispersed in a liquid medium. In recent years, the use of magnetic fluid has been suggested as a promising tool for various biomedical applications; however, it is necessary to evaluate the effects caused by the
Publicado em: 2008
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28. Avaliação da biocompatibilidade de magnetolipossomas à base de nanopartículas de maghemita
Nanobiotechnology represents an emerging and promising research field. Nanostructured materials, such as magnetic fluids and magnetoliposomes (MLs), have been proposed for drug-delivery systems and thermal-based cancer therapy amongst other several applications in biomedicine. In particular, MLs are physiologically stable structures, consisting of magnetic n
Publicado em: 2008
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29. Estudo das propriedades estruturais locais de fluidos magnéticos : da nanopartícula à dispersão
Local structural properties of magnetic fluids based on nanosized particles of zinc, copper or nickel ferrite are investigated. Nanograins prepared by a soft chemistry method are dispersed in acidic medium thanks to a core-shell strategy that prevents the particles from dissolution. Their chemical composition is no longer homogeneous and they can be describe
Publicado em: 2007
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30. Avaliação in vitro da citotoxicidade e genotoxicidade dos polímeros de albumina magnéticos
Nanotechnology is marked by an increasing interest in the biomedical field. Nanostructured materials, such as magnetic fluids, magnetoliposomes, and magnetic polymers, composed of magnetic nanoparticles (NPMs) have been proposed for several applications: drug delivery systems, cell sorter, in vitro and in vivo diagnosis, and also for the treatment of several
Publicado em: 2007
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31. Integração de dados de geofísica aérea aplicada à geologia e à prospecção mineral no distrito esmeraldífero de Itabira-Ferros, Quadrilátero Ferrífero, MG.
The Itabira-Ferros area is located in the Quadrilátero Ferrifero region, State of Minas Gerais, and it is known for abundant emerald occurrences. The area is characterized by volcanic metasedimetary sequences of the greenstone belt type (Rio das Velhas Super group) and paleoproterozoic iron formations of Minas Super Group, inserted in granitic bobies (Borra
Publicado em: 2006
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32. Studies synergic of photosensitizer drug used in the Photodynamic therapy and magnetic fluids used in cellular Hyperthermia / Estudos sinérgicos de fármacos fotossensibilizadores utilizados na terapia fotodinâmica e fluidos magnéticos utilizados em hipertermia celular
O principal interesse neste estudo foi a proposição de uma nova classe de material que permite a ação combinada da Terapia Fotodinâmica (TFD) e da Hipertermia (HPT), projetadas para trabalhar sinergicamente, que possa levar a uma considerável regressão de tumores neoplásicos após mínimas doses de dissipação de calor e/ou fotossensitização lumin
Publicado em: 2006
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33. Ferrofluids: properties and applications
Magnetic fluids may be classified as ferrofluids (FF), which are colloidal suspensions of very fine (~ 10 nm) magnetic particles, and magnetorheological fluids, which are suspensions of larger, usually non-stable, magnetic particles. We review the general classification and the main properties of FF, some theoretical models and a few applications. We conside
Brazilian Journal of Physics. Publicado em: 2005-09
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34. Lyotropic ferronematic liquid crystals based on new Ni, Cu and Zn Ionic magnetic fluids
The properties of lyotropic ferronematic liquid crystals based on new Ni, Cu and Zn ionic magnetic fluids are discussed. The efficiency of these new ferrofluids in the lyotropic nematic liquid crystal doping is verified and compared with the conventional surfacted ferro fluid lyotropic doping. It was observed that the structural characteristics of the lyotro
Brazilian Journal of Physics. Publicado em: 2002-06
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35. Surface charge density determination in electric double layered magnetic fluids
We analyze potentiometric and conductimetric measurements, simultaneously performed in several complex systems (Brönsted acid-base-type). The results show an excellent agreement between reported and obtained values of the dissociation constants of the involved equilibria. A similar analysis is proposed to account, in electric double layered magnetic fluids
Brazilian Journal of Physics. Publicado em: 2002-06
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36. Static magneto optical birefringence of new Electric Double Layered Magnetic Fluids
Magnetic birefringence measurements are performed under a static field on Electric Double Layered Magnetic Fluids based on copper and zinc ferrite nanostructures. The optical birefringence is related to a single-particle effect and well described by a Langevin model which includes a log- normal distribution of particles. By the field-induced birefringence le
Braz. J. Phys.. Publicado em: 2001-09