Materials Literature
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Ce projet de recherche mené en collaboration avec le CTP (Centre Technique du papier) a eu comme objectif de mettre en place une stratégie de greffage de polymères sur des fibres de cellulose via « Chimie Click » dans l’eau et dans des conditions douces et respectueuses de l’environnement afin de conférer de nouvelles…
Dans les années 2000, les matériaux de conversion sont apparus comme une alternative intéressante aux matériaux d'insertion actuellement utilisés dans les batteries Li-ion. Ils réagissent avec le lithium pour former une électrode constituée de nanoparticules métalliques encapsulées dans une matrice lithiée. Pour compr…
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES
As energias renováveis têm ganhado destaque como possíveis soluções para a questão da matriz energética mundial. Dentre as diferentes alternativas está a energia solar. As células fotovoltaicas são produzidas majoritariamente com silício metálico de alta pureza que é produzido tradicionalmente por um processo químico…
Pesquisas e publicações sobre polímeros luminescentes vêm sendo desenvolvidas nos últimos anos devido à inovação acadêmica, porém ainda no âmbito nacional possuem aplicação industrial limitada. Marcadores ópticos processados são pouco explorados devido à dificuldade de processamento dos materiais poliméricos luminesce…
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Resumo O presente trabalho teve como objetivo sintetizar e caracterizar um novo complexo trinuclear de rutênio, [Ru3O(CH3OO)6(3-pic)2(NO)]+, através de rotas sintéticas previamente descritas na literatura para complexos análogos. Para a obtenção deste complexo, foram necessárias cinco etapas de síntese, cada qual gera…
O eucalipto é uma espécie florestal tolerante a acidez do solo, ou seja, apresenta bom crescimento mesmo em solos com alta acidez ativa e trocável, sendo, portanto, dispensável a calagem com o objetivo de corrigir a acidez do solo. Por outro lado, para obtenção de produtividades em torno de 50 m3/ha/ano, considera-se…
Fracture and fracture toughness behavior of Zr-based metallic glass composites were investigated while varying test temperature. Samples were tested in tension and three-point bending to determine the effect of temperature change on the tensile strength, ductility, fracture toughness and fracture surface appearance. S…
Cette thèse a été consacrée à la mise au point de deux systèmes d'administration destinés à la voie orale, pour deux molécules différentes.Dans la première partie, des microparticules (MPs) à base de xylane et d'Eudragit® S-100 ont été produites pour encapsuler l’acide 5-aminosalicylique et permettre son absorption au…
editorial reviewed
Computer simulation of tetrahedral lattice distortion of iron-carbon system was performed. Modern embedded atom potentials for Fe-C system were used. It was shown that existing potentials can reproduce tetrahedral lattice distortion and don’t allow to describe concentration dependence of martensite thermal stability
We report the magnetotransport and $dc$ magnetic susceptibility of the polycrystalline samples of Pr$_{2}$Ba$_{4}$Cu$_{7}$O$_{15-δ}$, to examine the effect of magnetic field on the superconducting phase of the metallic CuO double chain. The resistive critical magnetic field is estimated to be about 21 T at low tempera…
Electrostatic complexation process involving polyelectrolyte and nanoparticles of opposite charge are receiving an increasing interest in view of their implications in numerous domains. In this thesis, we are particularly interested in the role of ratio Lp/R on the formation of complexes. To realize the variation of t…
Esta tese teve como objetivo o desenvolvimento de novos sistemas de liberação para duas\nmoléculas distintas. Na primeira parte, micropartículas à base de xilana e Eudragit® S-100\nforam produzidas para encapsular ácido 5-aminosalicílico visando à liberação cólonespecífica.\nA xilana foi extraída de sabugos de milho e…
The Microbiologically Influenced Corrosion (MIC) or bio-corrosion is recognized as one of the phenomena that cause a lot of problems in petroleum and gas industries, because it causes serious damages to the materials, reducing its life cycle. This study evaluated the effects of bio-corrosion characterized by the biofi…
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The image background is a schematic structure of the oil-in-water Pickering high-internal-phase-emulsion (HIPE) that is stabilized by commercial titania (TiO2) nanoparticles upon addition of small amounts of non-ionic surfactant Tween85. The open-cell hydrophilic polymer foams in the center of the image are the produc…
One of the key tasks of any living cell is maintaining the proper folding of newly synthesized proteins in the face of ever-changing environmental conditions and an intracellular environment that is tightly packed, sticky, and hazardous to protein stability1. The ability to dynamically balance protein production, fold…
Biskaborn, Boris K; Narancic, Niljana; Stoof-Leichsenring, Kathleen Rosmarie; Pestryakova, Luidmila A; Appleby, Peter G; Piliposian, Gayane T; Diekmann, Bernhard (2021): Diatom species assemblage of sediment core PG2133 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.930617, In: Biskaborn, BK et al. (2021): Diatom…