Solid Solid Interactions
Mostrando 37-48 de 247 artigos, teses e dissertações.
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37. Síntese, Reatividade e Caracterização Estrutural de Haletos de Telúrio e Ariltelurenila com Estados de Oxidação Incomuns ou Mistos. / Synthesis, Reactivity and Structural Characterization of Tellurium and Aryltellurenyl Halides with Unusual or Mixed Oxidation States.
This work presents a study related to the halogenation of diarylditellurides (RTe)2 in order to obtain tellurium and aryltellurenyl halides with unusual or mixed oxidation states. Although regarded as essentially unstable, the aryltellurenyl monohalides (RTeX) were generated in situ and captured from the reaction milieu in many ways, forming stable adducts o
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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38. 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
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39. SÍNTESE E CARACTERIZAÇÃO DE COMPLEXOS DE COBRE (II) E ZINCO (II) COM DIPEPTÍDEOS DE INTERESSE BIOLÓGICO / SYTHESIS AND CHARACTERIZATION OF COPPER (II) AND ZINC (II) COMPLEXES WITH DIPEPTIDES OF BIOLOGICAL INTEREST
This work describes the synthesis and characterization of copper (II) and zinc (II) complexes, with dipeptides in solid state. The dipeptides involved were: glycyl-glycine, glycyl-valine, methionyl-methionine, methionyl-glycine and cysteinyl-glycine, whose aminoacids take part in some proteins involved in neurodegeneration processes, more specifically in Alz
Publicado em: 2010
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40. Otimização das condições de cultivo e investigação das atividades citotóxica e antimicrobiana de metabólitos secundários do fungo endofítico Drechslera ravenelii / Optimization of the culture conditions and investigation of the cytotoxic and antimicrobial activities of the secondary metabolites from the endophytic fungus Drechslera ravenelii.
The interest in obtaining new drugs from endophytic microorganisms is growing, since this is a source still little exploited. In addition, the study of the interactions between plants and microorganisms has been widely discussed over the past few years. In this work, the endophytic fungus Drechslera ravenelii (SS33), isolated from the leaves of Smallanthus s
Publicado em: 2010
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41. Wet end chemistry in papermaking - interactions in solid-liquid interfaces. / Química da parte úmida em processo de fabricação de papel - interações em interfaces sólido-líquido.
Um polieletrólito catiônico (poliamina), com baixo peso molecular e elevada densidade de carga, normalmente aplicado como agente coagulante do lixo aniônico, foi usado para estudos de retenção e drenagem na fabricação de papel. O uso do carboximentil celulose de sódio para simulação do teor de lixo aniônico e seu efeito na retenção de cargas min
Publicado em: 2010
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42. Obtenção de gorduras zero trans por interesterificação quimica e caracterização para aplicação em alimentos / Obtaining zero trans fats by chemical interesterification and characterization for food applications
Chemical interesterification has been used as the main alternative for obtaining zero trans plastic fats. In particular, interesterification of liquid oils with fully hydrogenated oils (or hardfats) is the most versatile way for producing zero trans fats, yielding fat bases with different properties for food applications. In this work, blends of soybean oil
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/08/2009
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43. Investigação da ordem local de nanocolóides magnéticos por espalhamento em baixo ângulo
In this work, we investigate using small angle scattering measurements the colloidal stability and the local order (typically between 10 nm and 100 nm) of magnetic nanocoloides, made of solution of magnetic ferrite nanospheres and mixed systems of magnetic nanospheres and laponite nanoplatelets. The balance of interparticles interactions has been quantitativ
Publicado em: 2009
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44. Avaliação do comportamento de flavonas e flavonóis frente à celulose microcristalina em estado sólido / Evaluation of the behavior of flavones and flavonols with Microcrystalline cellulose in solid state
Neste trabalho, foi avaliado o comportamento de alguns flavonóides e do adjuvante tecnológico celulose microcristalina (CMCr) no estado sólido, em relação ao tipo de interação e sua intensidade, quando existente, utilizando misturas físicas equiponderais e na proporção ponderal 1:2, respectivamente, através da calorimetria exploratória diferencia
Publicado em: 2009
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45. Evaluation of supramolecularity of triazenide complexes mononuclear and binuclear of Ag(I) / Avaliação da Supramolecularidade de complexos triazenidos mononucleares e binucleares de Ag(I)
This work presents the synthesis and the investigation of the crystalline and molecular structure of five new mononuclear or binuclear complexes of Ag(I) with monocatenated triazenido ligands. The mononuclear complexes were synthesized from the binucleares complexes. With the addition stoichiometric of the ligand triphenylphosphine occurs the split of the bi
Publicado em: 2009
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46. Argilominerais puro e quimicamente modificados como adsorventes para corantes catiônicos / Natural and chemically ativated clays as adsorbent for cationic dyes.
The interactions between lamellar silicate with dyes have been widely studied for analytical applications that are intended as and electrochemical adsorption. In this work, sodium vermiculite (Vs) and vermiculites exchanged with copper (V/Cu) and cobalt (V/Co) and through controlled leaching (Vac1 and Vac3) were synthesized. The vermiculite reacted with nitr
Publicado em: 2009
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47. CASCA DE ARROZ COMO ADSORVENTE PARA ÍONS DE METAIS PESADOS: Caracterização e modificação química / RICE HUSK AS ADSORBENTS FOR HEAVY METAL IONS: characterization and chemical modification
Adsorption of some metal ions (Co2+, Ni2+, Cu2+ e Zn2+) from aqueous solutions (pH 5.0) onto in nature rice husk (0.088 < <0.177 mm) was investigated. All experiments were conducted by the batch adsorption techniques at room temperature (28 1C) and under constant stirring. The adsorption amounts were determined using atomic absorption spectr
Publicado em: 2009
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48. Propriedades estruturais, microestruturais e elétricas da cerâmica BaSnO3 / Structural properties, the microstructural and electrical ceramics BaSnO3
The surface properties of ceramic powders play an important role in the production of devices of high quality, high performance and reliability. Many of these properties are related to interactions with the environment. One example, ceramics are used in gas sensor devices. A ceramic material that has been reported as promising gas sensor is perovskite BaSnO3
Publicado em: 2009