Solid Solid Interactions
Mostrando 25-36 de 247 artigos, teses e dissertações.
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25. NOVO SORVENTE DE HIDROFOBICIDADE REDUZIDA PARA EXTRAÇÃO EM FASE SÓLIDA: PREPARAÇÃO E CARACTERIZAÇÃO
C18 chemically bonded sorbents have been the main materials used in solid phase extraction (SPE). However, due their high hydrophobicity some hydrophobic solutes are strongly retained leading to the consumption of larger quantities of organic solvent for efficient recoveries. This work presents a sorbent with lower hydrophobicity but similar selectivity to t
Quím. Nova. Publicado em: 2015-02
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26. Solid, Solution and Gas Phase Interactions of an Imidazolium-Based Task-Specific Ionic Liquid Derived from Natural Kojic Acid
Um líquido iônico imidazólio de função específica derivado do ácido kójico natural teve suas interações supramoleculares investigadas no estado sólido, em solução e em fase gasosa. Diferentes técnicas como difração de raios X de monocristal, espectroscopia de ressonância magnética nuclear (NMR), espectrofotometria UV-Vis, medidas de conduti
J. Braz. Chem. Soc.. Publicado em: 2014-12
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27. Oceanografia e Química: unindo conhecimentos em prol dos oceanos e da sociedade
The marine environment is certainly one of the most complex systems to study, not only because of the challenges posed by the nature of the waters, but especially due to the interactions of physical, chemical and biological processes that control the cycles of the elements. Together with analytical chemists, oceanographers have been making a great effort in
Quím. Nova. Publicado em: 2013
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28. Catalisadores de Pd metálico modificados por líquidos iônicos para a hidrogenação seletiva de compostos poli-insaturados
In this work, heterogeneous catalysts immobilized on supported ionic liquid (IL) were prepared, characterized and investigated in hydrogenation reactions of the substrates 1,5-cyclooctadiene (1,5-COD), trans-cinnamaldehyde (CALD) and nitrobenzene (NB). Two methods were used to prepare the catalysts. In the first, commercial Pd/C catalyst was coated with diff
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/08/2012
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29. Efeito de materiais particulados em sistemas modelos de biomembranas / Effect of Particulate Material on Biomembrane Model Systems
This work presents some of the properties of mimetic systems of pulmonary surfactants (PS) composed of dipalmitoylphosphatidylcholine (DPPC) and DPPC/cholesterol and their interactions with particulate material (PM) originated from the burning of sugar cane leaves which is known by clinical studies as an injurious agent of the respiratory airways. The PM des
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/05/2012
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30. Vias efetoras pelas quais a Hsp70 de Mycobacterium tuberculosis inibe a rejeição aguda em um modelo de aloenxerto cutâneo
Transplantation of solid organs has emerged as a viable therapeutic modality for the treatment of a variety of disorders. Rejection of solid organ allografts is the result of a complex range of interactions involving coordination between both the innate and adaptive immune system. Therewith, a major goal of clinical organ transplantation is to induce a donor
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/03/2012
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31. NEW APPROACHES TO INTERACTIONS DATA ANALYSIS AT SOLID/SOLUTION INTERFACE. / NOVAS ABORDAGENS PARA ANÁLISE DE DADOS DE INTERAÇÕES EM INTERFACES SÓLIDO/SOLUÇÃO.
Nesse trabalho, realizaram-se abordagens inovadoras sobre a análise de dados de sorção em interfaces sólido/solução. Avaliaram-se dados de equilíbrio da sorção do corante amarelo remazol em sílica-aminopropil. Os melhores ajustes foram obtidos utilizando-se os modelos de equilíbrio químico de Langmuir, Langmuir-Freundlich e Sips. Muitas abordagen
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/02/2012
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32. Analysis of semi-solid processing for metal matrix composite synthesis using factorial design
The main goal in this work is to conduct a quantitative analysis of the mechanical stir casting process for obtaining particulate metal matrix composites. A combined route of stirring at semi-solid state followed by stirring at liquid state is proposed. A fractional factorial design was developed to investigate the influence and interactions of factors as: t
Materials Research. Publicado em: 31/01/2012
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33. Spectroscopic study of molecular dynamics and packing in organic semiconductors / Estudo espectroscópico da dinâmica molecular e empacotamento em semicondutores orgânicos
In this dissertation we present a study of the molecular dynamics and packing in organics semiconductor with different conjugated chains lengths using a of multi-techniques approach, in particular, Nuclear Magnetic Resonance (NMR), Wide Angle X-ray Scattering (WAXS), Differential Scanning Calorimetry (DSC), Raman spectroscopy, UV-Vis absorption and fluoresce
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/07/2011
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34. Multicomponent complex formation between pyrimethamine, cyclodextrins and water-soluble polymers
The combined effect of hydroxypropyl-β-cyclodextrin (HPβCD) and polyvinylpyrrolidone (PVP) or sodium carboxymethylcellulose (CMC) on the solubility of pyrimethamine (PYR) was studied. Equimolar PYR-HPβCD solid systems, in the presence or the absence of 0.25% (w/v) PVP or 0.10% (w/v) CMC were prepared by coevaporation or freeze-drying, and characterized by
Brazilian Archives of Biology and Technology. Publicado em: 2011-10
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35. Effect of particle clusters on turbulence modulations in liquid flow laden with fine solid particles
Studies on particle distributions and interactions between the particles and the liquid turbulence are extremely significant and can help to improve efficiency of industrial processes and final product quality. In this paper, the particle distribution and the particle - turbulence interaction in the solid - liquid flow were investigated in detail by a numeri
Brazilian Journal of Chemical Engineering. Publicado em: 2011-09
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36. Interação de átomos leves com clusters de metais de transição
Density Functional Theory (DFT) calculations on the interactions of small atoms (H, C, O, and S) on first-row transition metal clusters were performed. The results show that the adsorption site may vary between the metal surface and the edge of the cluster. The adsorption energies, adatom-nearest neighbor and adatom-metal plane distances were also determined
Química Nova. Publicado em: 2011-09