Supported Reagent
Mostrando 1-12 de 22 artigos, teses e dissertações.
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1. Agarose-Alumina Composite Supported Palladium Catalyst for Suzuki Coupling Reactions
The palladium catalyst supported on agarose-alumina composite and its utilization in the Suzuki reaction have been investigated. The agarose-alumina composite was prepared and modified with organofunctional groups by reacting with the coupling reagent 3-aminopropyltriethoxysilane (APTES) through Al−O−Si bonds. Palladium was efficiently loaded on the comp
J. Braz. Chem. Soc.. Publicado em: 2015-04
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2. Oxidação de glicerol sobre nanopartículas de ouro suportadas em carvão ativado: monitoramento quimiométrico da reação por ESI-MS e MIR
A study on the monitoring of glycerol oxidation catalyzed by gold nanoparticles supported on activated carbon under mild conditions by chemometric methods is presented. The reaction was monitored by mass spectrometry-electrospray ionization (ESI-MS) and comparatively by mid infrared spectroscopy (MIR). Concentration profiles of reagent and products were dete
Quím. Nova. Publicado em: 2013
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3. Validation of an experimental polyurethane model for biomechanical studies on implant-supported prosthesis: compression tests
OBJECTIVES: The complexity and heterogeneity of human bone, as well as ethical issues, most always hinder the performance of clinical trials. Thus, in vitro studies become an important source of information for the understanding of biomechanical events on implant-supported prostheses, although study results cannot be considered reliable unless validation stu
Journal of Applied Oral Science. Publicado em: 2011-02
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4. Silica-supported quinolinium tribromide: a recoverable solid brominating reagent for regioselective monobromination of aromatic amines
Sintetizamos tribrometo de quinolina suportado em sílica, que mostrou ser um reagente de bromação eficiente, estável e reutilizável para a monobromação regiosseletiva de aminas aromáticas. Esse processo tem a vantagem de apresentar alto rendimento sob condições moderadas e usando procedimentos experimentais simples.
Journal of the Brazilian Chemical Society. Publicado em: 2010
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5. Filtro a base de nanofibras de carbono para sequestro de enxofre em efluentes gasosos ricos em H2S / Carbon nanofibers based filter to sulfur removal from efluents rich in H2S.
Over the last few decades, sulfur recovery from the H2S-containing acid gases have become more and more important due to the ever increasing standards of efficiency required by environmental protection measures. The general trend is to selectively transform H_2S into elemental sulfur which is a valuable product, by the modified Claus process. However, due to
Publicado em: 2009
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6. Síntese de novos naftoimidazóis derivados de β-lapachona e compostos relacionados, empregando irradiação na região de microondas e reagentes suportados, e outras sínteses. / Synthsis of new naphthoimidazole derivatives from β-lapachona and related compounds, using irradiation on microwaves region and supported reagents, and other synthesis.
In this work it was investigeted the use of microwaves and supported reagents to the synthesis of β-lapachone, nor-β-apachone and β-lapachone-3-sulfonic acid naphthoimidazole derivatives. The purpose was to develop a methodology in agreement with the environmental exigencies, by the reduction of solvents use, more efficient energy transfer pro
Publicado em: 2008
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7. CONCEPÇÃO, CONSTRUÇÃO E AVALIAÇÃO DE FOTORREATORES CATALISADOS NA DEGRADAÇÃO DE CARGA POLUENTE E AMOXICILINA EM EFLUENTE HOSPITALAR
The focus of this study was the application of advanced oxidation photoprocesses, heterogeneous photocatalysis and photo-Fenton, in the degradation of pollutant load and amoxicillin in wastewater from the University Hospital of Santa Maria (HUSM), evaluating the photoreactors performance in the degradation efficiency. In the hospital wastewater there is a wi
Publicado em: 2008
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8. Determinação de espécies de arsênio, antimônio e chumbo em antimoniato de meglumina por espectrometria de absorção atômica após extração em fase sólida. / Determination of arsenic, antimony and lead in meglumine antimoniate by atomic absorption spectrometry after extraction in solid phase.
In this study, two flow systems with a solid phase extraction were developed for the determination of Sb(III), Pb(II) As(V) and total As by atomic absorption spectrometry in sample of meglumine antimonate, which is the chosen medication in Brazil for treating leishmaniasis. For the determination of Sb(III) and Pb(II) with solid phase extraction and flame ato
Publicado em: 2006
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9. Fotodestruição de compostos potencialmente toxicos utilizando TiO2 e luz solar
The destruction of potentially toxic compounds by photocatalysis was studied in this work in two different systems: a) the system using colloidal TiO2, where the influence of silver deposits was evaluated for the photodegradation of phenol. b) the system using TiO2 P 25 supported on a glass plate as part of a plug flow reactor using solar light as source of
Publicado em: 1995
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10. Crisotila brasileira como suporte de catalisadores : aplicação na oxidação de alcoois com radiação de microondas
Chrysotile is a low cost fibrous serpentine, largely employed in building construction materials, among others. Individual fibers show high density of basic surface sites, positive zeta-potential at pH s between 3 and 11 and a surface area in the order of 10m.g. This properties point to its potential application as a catalysts support, with other following a
Publicado em: 1994
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11. Modificação de superficie de polietileno de alta e de baixa densidade
Polyethylene (HDPE and LDPE) surfaces can be modified by impregnation with Fe and Mn oxides. The method used consists in Fe(CO)5 sorption by the plastic and its in situ oxidation. Oxidants used are acidic or basic solutions of KMnO4. Polyethylene can also be impregnated with MnO2 only, by immersion in acidic KMnO4 solutions at temperatures higher than 50°C
Publicado em: 1982
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12. Partitioning of Thy-1, GM1, and cross-linked phospholipid analogs into lipid rafts reconstituted in supported model membrane monolayers
As shown earlier, raft-like domains resembling those thought to be present in natural cell membranes can be formed in supported planar lipid monolayers. These liquid-ordered domains coexist with a liquid-disordered phase and form in monolayers prepared both from synthetic lipid mixtures and lipid extracts of the brush border membrane of mouse kidney cells. T
The National Academy of Sciences.