Cristallinity
Mostrando 1-12 de 14 artigos, teses e dissertações.
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1. Aplicação de processos de separação por membranas para a obtenção de frutooligossacarídeos funcionais a partir da raiz de yacon (Smallanthus sonchifolius)
O yacon é uma planta perene originária da região andina, cujas raízes têm recebido atenção devido ao alto teor de frutooligossacarídeos (FOS) prebióticos. Além de proporcionar benefícios à saúde, os FOS apresentam características interessantes como ingredientes alimentícios, sendo utilizados como substitutos do açúcar. Sua extração das ra�
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
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2. Isótopos de carbono em filitos carbonosos da sequência metavulcano-sedimentar Marmeleiro, Sul de Ibaré, Rio Grande do Sul
Carbon isotope ratios for carbonaceous material in the graphite prospect of Marmeleiro Sequence, southwestern of the Sul-rio-grandense Shield, have been determined. The results are approximately constant with d13C-values between -27 and -24 per mil. These values suggest that the studied carbonaceous rocks were formed from syngenetic organic detritus, which w
Publicado em: 2010
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3. Amido resistente obtido a partir de amido de leguminosas e de seus hidrolisados / Resistant starch from legumes starches and their hydrolysates
Resistant starch (RS) is the fraction of starch that does not suffer the action of digestive enzymes, showing similar behavior to that of dietary fiber. The aim of this study was to evaluate the amounts and characteristics of RS obtained from chick-pea and high amylose pea starches using different processes of molecular weight reduction. The natural or prege
Publicado em: 2009
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4. Influência de modificações interfaciais nas propriedades mecânicas de compósitos de polipropileno com farinha de madeira
Among numerous fibers of commercial interest used as fillers and reinforcement in thermoplastics, wood waste fibers (WWF), mostly known as wood flour, can replace mineral fillers such as talc, CaCO3 and fiberglass with great advantage. Wood-plastics composites (WPCs) technology includes concepts of compatibility and processing and yet presents technical chal
Publicado em: 2007
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5. Síntese, caracterização e avaliação do perfil de liberação "in vitro" de hidrogéis do álcool polivinílico ph sensitivos processados por métodos físico-químico
In this study hydrogels of poly(vinyl alcohol) (PVA) processed by chemical method and gamma radiation were obtained in order to evaluate the pH responsive behaviour of those systems as well the utilization for the targeted drug delivery in the gastrointestinal tract of Human. The rheological properties of PVA solutions with different hydrolysis degree and we
Publicado em: 2007
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6. Revestimento de stents com filmes de PVA eluidores de S-nitrosoglutationa / Stents coating with S-nitrosoglutathione-eluting poly (vynyl alcohol) films
Stents are expansible wire mesh tubes used in angioplasty procedures in order to widening the luminal diameter of the coronary arteries. There is currently a great interest in the development of stents coated with drug-eluting polymeric matrices, which are able to prevent future closure of artery (restenosis). S-nitrosothiols which are nitric oxide (NO) dono
Publicado em: 2006
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7. Sintese e caracterização de membranas de quitosana para aplicação na regeneração de pele / Synthesis and characterization of chitosan membranes for application in skin regeneration
Chitosan is an atoxic, biocompatible and biodegradable polysaccharide with bacteriostatic and healing properties showing potential use in biomaterial synthesis. In this context, the aim of this work was to study the effects induced by chitosan solution concentration and by chitin and glycerol incorporation in the total raw material cost, physical (morphology
Publicado em: 2005
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8. Iron oxide based nanoparticles: synthesis and characterization / Síntese e caracterização de nanopartículas baseadas em óxidos de ferro
Magnetic nanoparticles have importance in several areas of knowledge including physics, chemistry and biology. Obtaining nanomaterials with well defined characteristic and shapes is a great challenge for this area of research. In this work two synthetic processes for the synthesis of the magnetic nanoparticles were developed, in reversed micelles and sol-gel
Publicado em: 2005
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9. Genese dos depositos auriferos em metaconglomerados da formação moeda, Quadrilatero Ferrifero, MG : o papel do metamorfismo e associação com a materia carbonosa / Genesis of the metaconglomerate-hosted gold deposits of the moeda formation, Quadrilatero Ferrifero (State of Minas Gerais) : role of the metamorphism and the association with carbonaceous matter
The Quadrilátero Ferrífero has historically been one of the most important gold province in Brazil, with a significant number of productive greenstone-hosted lode gold deposits within the Rio das Velhas Supergroup together with those associated with the metasedimentary sequence of the Minas Supergroup. At the base of the Moeda formation, Minas Supergroup,
Publicado em: 2005
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10. Modificação do polipropileno com o poli(estireno-B-butadieno-B-estireno)
The aim of this work was to characterize physically, chemically and chromatographically HPLC stationary phases prepared with silica modified with zirconium titanium and aluminum oxides and having polymethyloctylsilane, PMOS, immobilized onto the surfaces. The physical tests used were X Ray Fluorescence (XRF), X Ray Absorption (XAS), X Ray Diffraction (XRD),
Publicado em: 2004
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11. Caracterizações fisicas, quimicas e cromatograficas de silicas modificadas por camadas de oxidos metalicos
The aim of this work was to characterize physically, chemically and chromatographically HPLC stationary phases prepared with silica modified with zirconium titanium and aluminum oxides and having polymethyloctylsilane, PMOS, immobilized onto the surfaces. The physical tests used were X Ray Fluorescence (XRF), X Ray Absorption (XAS), X Ray Diffraction (XRD),
Publicado em: 2004
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12. Obtenção e caracterização de (hidr)oxidos de ferro
Magnetite was produced by heating iron (III) hydroxoacetate (lHA) under nitrogen. By varying the conditions of lHA preparations (acetate concentration in solids, starting reagents and association with other metaIs) and its heating temperature, materiaIs of different properties were prepared. Iron (III) hydroxoacetate gels were obtained through hydrogenolysis
Publicado em: 1991