Magnetic Nanoparticle
Mostrando 13-23 de 23 artigos, teses e dissertações.
-
13. Efeito magnetoforético aplicado à separação de nanopartículas magnéticas biocompatíveis / Efeito magnetoforético aplicado à separação de nanopartículas magnéticas biocompatíveis / Magnetoforetic effect applied to biocompatible magnetic Nanoparticle segregation / Magnetoforetic effect applied to biocompatible magnetic Nanoparticle segregation
Neste trabalho foi desenvolvido um experimento magnetoforético (EMF) para estudar o efeito de um gradiente de campo magnético sobre o diâmetro e dispersão de tamanhos de nanopartículas em fluidos magnéticos (FM). Neste experimento, a massa de um imã permanente é medida por uma balança enquanto varia graças à interação com o FM, colocado alguns c
Publicado em: 2011
-
14. X-DLVO Interactions between nanocolloidal magnetic particles: the quantitative interpretation of the pH-dependent phase diagram of EDL-MF
The phase behavior of acidic samples of EDL-MF based on cobalt ferrite nanoparticles with controlled mean sizes was investigated at constant temperature and in absence of magnetic field. By monitoring the nanoparticle charge by pH adjustments, we constructed an experimental pH-dependent phase diagram for all samples that revealed sol, gel thixotropic or coag
Brazilian Journal of Physics. Publicado em: 2009-04
-
15. Development of a nanoparticle generator and caracterization of cobalt nanoparticles / Desenvolvimento de um gerador de nanopartículas e caracterização de nanopartículas de cobalto
We have developed a nanoparticle (NP) generator by adapting one of the sputtering guns on a magnetron sputtering system. With it, we are able to produce nanoparticles with different types of material. The adaptation consists of including a high-pressure region in the path of the atomic vapor removed from the sputtering target. The condensation happens thermo
Publicado em: 2009
-
16. Estudo da biodistribuição e biocompatibilidade de nanopartículas magnéticas à base de maguemita recobertas com DMSA em macacos-prego (Cebus spp.) juvenis mediante análise morfológica
It is essential to determine the biodistribution and biocompatibility of magnetic nanoparticles (MNPs) for in vivo biomedical applications in order to ensure their safe clinical use. Biodistribution of MNPs depends on their properties, such as surface characteristics, size, shape and charge, which can all affect biodistribution, clearance, particle-cell inte
Publicado em: 2009
-
17. Development of palladium nanoparticle catalysts for hydrodechlorination reaction / Desenvolvimento de catalisadores de paládio nanoparticulado para a reação de hidrodescloração
The hydrodechlorination reaction (HDC) has received great attention as an alternative treatment of organic residues, which is more efficient than incineration, especially for aromatic organic compounds, and avoids the formation of toxic species, such as furans and dioxins. The present study is focused on the preparation of supported palladium nanocatalysts f
Publicado em: 2009
-
18. Synthesis, characterization of biocompatibility and evaluation of bioadhesion of n-carboxymethylchitosan nanoparticles in hybrid networks with poliacrylic acid / Síntese, caracterização e avaliação da biocompatibilidade e bioadesão de nanopartículas de n-carboximetilquitosana em redes híbridas com ácido poliacrílico
Chitosan nanoparticle complexes with polyacrylic acid have been used in nanotechnology, as they improve pharmacological activity, in chemical and biological terms, and in particular, increase drug bioavailability. The aim of this work is to evaluate the biocompatibility and bioadhesion of N-carboxymethyl derivatives of chitosan (N-CMC) with in situ polymeriz
Publicado em: 2009
-
19. Avaliação da biocompatibilidade da anfotericina b em duas formulações : livre e associada com nanopartículas magnéticas
Os materiais magnéticos têm despertado crescente interesse na área biomédica. Dentre eles, fluidos magnéticos (FM) ou magnetolipossomas (ML) constituídos a partir de nanopartículas magnéticas (NPM) têm sido propostos como carreadores de drogas, para separação de células, diagnóstico in vitro ou in vivo e para o tratamento de diversas patologias,
Publicado em: 2008
-
20. 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
-
21. Avaliação da biocompatibilidade/toxicidade de fluidos magnético composto de nanopartículas de maghemita recobertas com citrato em camundongos fêmeas swiss
Materiais nanométricos são aqueles cujo tamanho variam de 1 a 100 nm. Dentre eles, os fluidos magnéticos (FM) são suspensões coloidais estáveis compostas de nanopartículas magnéticas dispersas em líquidos apropriados. FM têm sido alvo de interesse pelas mais variadas áreas, como as biomédicas. Fluido magnético à base de nanopartículas de maghe
Publicado em: 2007
-
22. 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
-
23. A Simple and Highly Sensitive Method for Magnetic Nanoparticle Quantitation Using 1H-NMR Spectroscopy
Iron oxide superparamagnetic nanoparticles (SPIONs) have drawn significant attention because of their potential impact on medical diagnosis and therapy. However, the difficulty of achieving reliable and standardized quantification of these nanoparticles has limited the uniform study of nanoparticle systems. Current measurement techniques have limited sensiti
The Biophysical Society.