Magnetic Latex
Mostrando 1-12 de 19 artigos, teses e dissertações.
-
1. Protein Removal from Natural Rubber Latex with Fe3O4@Al2O3 Nanoparticle
The presence of protein in the natural rubber latex for the medical device manufacture seems to be the most considered compound due to its allergic effect. Magnetic coated alumina (Fe3O4@Al2O3) has been known as an adsorbent for organic substrates due to its performance through physical and/or chemical interaction. In the current study, we tried to figure ou
J. Braz. Chem. Soc.. Publicado em: 2021-02
-
2. Synthesis and characterization of isoprene oligomers to compare different production chemical processes
Abstract Three methods to obtain isoprene oligomers were evaluated: chemical degradation of non-vulcanized coagulated natural rubber; chemical degradation of natural rubber latex; and oligomerization of the isoprene monomer. The products were characterized by infrared spectrometry (FTIR), nuclear magnetic resonance (NMR) and size-exclusion chromatography (S
Polímeros. Publicado em: 18/03/2019
-
3. Multifunctional Nanocomposites between Different Carbon Nanostructures and Styrene Acrylic Latex
This work describes the preparation, characterization and properties study of multifunctional nanocomposites between poly(styrene-co -butyl acrylate) latex and different carbon nanostructures: iron-filled carbon nanotubes (CNT), graphene or graphene oxide. Different approaches were employed to prepare stable aqueous dispersions of these nanostructures, accor
J. Braz. Chem. Soc.. Publicado em: 2017-08
-
4. Exudates used as medicine by the "caboclos river-dwellers" of the Unini River, AM, Brazil – classification based in their chemical composition
Abstract Although the use of exudates in traditional medicine has been commonly observed during ethnopharmacological surveys, few records have been made concerning the scientific merits of these products. The aim of this study was to document ethnopharmacological data and to classify exudates used as medicine by the "caboclos" river-dwellers from the Unini R
Rev. bras. farmacogn.. Publicado em: 2016-06
-
5. MICROEMULSÕES: COMPONENTES, CARACTERÍSTICAS, POTENCIALIDADES EM QUÍMICA DE ALIMENTOS E OUTRAS APLICAÇÕES
Microemulsions (MEs) are thermodynamically stable systems consisting of nanosized droplets dispersed in a solvent continuous medium (known as pseudo-phase), which is immiscible with the dispersed phase. These systems consist of water, a hydrophobic solvent called "oil," an amphiphile and often, a co-surfactant that is normally a medium chain alcohol. A large
Quím. Nova. Publicado em: 2015-11
-
6. Análise metabolômica via RMN: amostras de urina e látex / Metabolomic analyses by NMR: urine and latex samples
The aim of the first part of this work was to apply the concept of metabolomic analyses in urine samples obtained from humans diagnosed with type 2 diabetes mellitus (T2DM) and impaired glucose tolerance (IGT) and treated with yerba-mate (Ilex paraguariensis) infusions using nuclear magnetic resonance. T2DM is the most recurrent type of diabetes and correspo
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/07/2011
-
7. Estudo de Filmes Automontados de látex de borracha natural, Carboximetil-quitosana e nanopartículas magnéticas / Study of Self-Assembling Films of Natural Rubber Latex, carboxymethyl chitosan and magnetic nanoparticles
In this work, we investigated the fabrication of ultrathin films of natural rubber latex (NRL), carboxymethyl-chitosan (CMC) and magnetite (Fe3O4) nanoparticles (MNP) in different supramolecular architectures. The materials choice was based on the mechanical properties and biocompatibility of NRL, antimicrobial action of CMC and magnetic properties of MNP, w
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/11/2010
-
8. CONSTRUCTION OF AN COMPACT SQUID MAGNETOMETER FOR CHARACTERIZATION OF THE MAGNETIC NANOPARTICLES USED IN BIOLOGICAL ASSAYS / CONSTRUÇÃO DE UM MAGNETÔMETRO SQUID COMPACTO PARA CARACTERIZAÇÃO DE NANOPARTÍCULAS MAGNÉTICAS UTILIZADAS EM ENSAIOS BIOLÓGICOS
The immunoassay is an important tool in clinical diagnostics and in fundamental research. Magnetic nanoparticles, bound with antibodies, have been applied increasingly for various immunoassays with the purpose of separation and quantification of antigens. We developed a system based on bulk SQUIDs for detecting the field generated from remanent magnetization
Publicado em: 2010
-
9. Preparo e modificação química de látex magnético à base de nanocompósitos de ferrita de cobalto e poliestireno / Preparation and chemical modification of latex-based nanocomposite magnetic cobalt ferrite and polystyrene
Neste trabalho, nanocompósitos magnéticos de ferrita de cobalto/poliestireno, com aproximadamente 30% de teor de ferrita de cobalto encapsulada e tamanho médio de 100nm foram preparados, a partir da técnica de polimerização em miniemulsão, com uso de poli(álcool vinílico) (PVA) como agente emulsificante. A ferrita de cobalto (CoFe2O4) foi sintetizad
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/12/2009
-
10. Observação de vortices magneticos em calotas tridimensionais submicrometricas / Magnetic vortex observation in sub-micrometric tri-dimensional caps
Neste trabalho fizemos um estudo sistemático de filmes compostos por multicamadas Co/Pd depositados sobre arranjos auto-organizados de esferas de látex submicrométricas (50 ? 1000 nm). O filme depositado sobre a esfera (não-magnética) forma uma calota magnética com espessura variável. As espessuras de Co e Pd foram escolhidas de modo a obter duas clas
Publicado em: 2008
-
11. Encapsulação de nanopartículas de magnetita em matriz de poli(metacrilato de metilacoácido metacrílico) por processo de polimerização em miniemulsão
Partículas magnéticas são sistemas com potencial de uso em liberação controlada fármacos, ferrofluidos e tratamentos de efluentes. Em muitas situações, como em aplicações biológicas, é necessário revestir as partículas magnéticas com um material orgânico, como polímeros. Neste trabalho, partículas magnéticas foram obtidas pelo revestimento
Publicado em: 2007
-
12. DeterminaÃÃo experimental da solubilidade de eletrÃlitos em solventes puros e misturas de solventes
The knowledge of the solubility of an electrolyte in a pure solvent, or in a mixture of solvent, is extremely important for many industrial applications and also in the design of industrial equipment. This knowledge can also be useful for the studies of modeling for the prediction of solubility data. In this work, the experimental solubility of an electrolyt
Publicado em: 2007