Glass Chemistry
Mostrando 1-12 de 39 artigos, teses e dissertações.
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1. MATERIAIS VÍTREOS E LUZ: PARTE 1
2015 is the Year of Light, according to UNESCO. Chemistry has a close relationship with light and one of the materials that allows such synergy is glass. Depending on the chemical composition of the glass, it is possible to achieve technological applications for the whole range of wavelengths extending from the region of the microwave to gamma rays. This div
Quím. Nova. Publicado em: 2016-04
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2. Sensor químico baseado em microponte de impedância = : Chemical sensor based on impedance microbridge / Chemical sensor based on impedance microbridge
A integração de sistemas microeletrônicos em lab-on-a-chip está sendo cada vez mais necessária para concretizar novas aplicações dentro do emergente campo da microfluídica. Tanto na química quanto na bioquímica e até mesmo na medicina e bioengenharia, a microfluídica evolui conquistando um espaço crescente. Entretanto, desafios tecnológicos res
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/07/2012
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3. Estudo do comportamento de hastes de polímero de mamona dopado com vidro bioativo e hidroxiapatita no canal medular do fêmur de ratos / Study the behavior of castor oil polymer rods associated with bioactive glass and hydroxyapatite in the medullary canal of the femur of rats
Atualmente a associação de biomateriais tem sido realizada com o intuito de minimizar suas deficiências individuais. O objetivo deste trabalho foi avaliar o comportamento de hastes de polímero de mamona dopado com vidro bioativo e hidroxiapatita no canal medular do fêmur de ratos para uma possível aplicação como método para fixação de fraturas e r
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/03/2012
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4. ATUAÇÃO DE BENTONITE E POLIVINILPOLIPIRROLIDONA (PVPP) NA CLARIFICAÇÃO DE VINHOS ESPUMANTES / PERFORMANCE OF BENTONITE AND POLYVINYLPOLYPYRROLIDONE (PVPP) IN THE CLARIFICATION OF SPARKLING WINE
The size and persistence of the bubbles is one of the characteristics pursued by consumers of sparkling wine. The perlage is closely linked to nitrogen products, usually proteins of low molecular weight. Furthermore, bentonite and polyvinylpolypyrrolidone (PVPP) are glues used both in cleaning up the base wine and the sparkling wines, in other words, the fer
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/04/2011
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5. GLASS AND GLASS-CERAMICS WITH HIGH METAL CONCENTRATION OF FROM INDUSTRIAL WASTES / Vidros e vitrocerâmicos com alta concentração de metais obtidos a partir de resíduos industriais
The reuse of industrial waste materials is considered as an important source of raw-materials to be employed at new products. However proper criteria is needed in order to obtain vitreous materials from industrial solid wastes like solid galvanic waste (metallurgical industry) as main raw material. Ajusting the composition silica fine powder (ceramic industr
Publicado em: 2008
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6. Petrography and mineral chemisty from Indaiá I and Indaiá II intrusions, western Minas Gerais State / Petrografia e química mineral das intrusões Indaiá I e Indaiá II, oeste do Estado de Minas Gerais
An integrated petrographic and mineral chemistry study has been carried out on ultramafic, potassic to ultrapotassic and silica-undersaturated rocks of kimberlitic affinity of the Indaiá I and Indaiá II intrusions, Western Minas Gerais State, Brazil. These rocks outcrop at the Alto Paranaíba Igneous Province (PIAP), within a N30W-trending, elongated area,
Publicado em: 2008
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7. Monitoramento da qualidade do ar de ambientes internos : bibliotecas.
The main objective of this study was to monitor and to characterize the particulate material (PM) with equivalent diameter between 2,5 and 10 m (PM2,5-10), particulate with equivalent diameter smaller than 2,5 m (PM2,5), particulate with total suspended particles (TSP), and some pollutant gases (ammonia, chlorine, carbon dioxide, ozone, benzene, carbon monox
Publicado em: 2007
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8. Supramolecular chemistry of tetrapyridylporphyrins associated with platinum(II) complexes / Química supramolecular de tetrapiridilporfirinas associadas a complexos de platina(II)
The synthesis, characterization and investigation of the molecular and supramolecular behaviour of meso-tetrapyridylporphyrins containing four chloro(bipyridine) platinum(II) complexes attached at the meta and para positions of the peripheral pyridine ligands is focused on this thesis. The isomeric supermolecules were isolated in the solid state, and extensi
Publicado em: 2006
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9. Influencia da radiação ionizante em compositos odontologicos, ionomero de vidro e ceramica
The influence of the ionizing radiation from diagnosis radiographic exams or radiotherapy treatment in dental materials as resin composite, glass ionomer and ceramic dental is not wide known. Trying a better understanding about the ionizing radiation influence in the chemical behavior, in molecular scale, of the esthetics restoration materials used in the de
Publicado em: 2005
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10. Métodos de Preparação e Propriedades de Vidros de Fluoretos
The havy metal fluoride glasses have usually many cationic species and many intermediary reactions happen during the smelt. However the melteds cooling is very fast. Thus the proprieties of the glass depend strongly of the chemical way and of the termic history. In this work we study the effect of chemistry way (method of preparation) about the termics and o
Publicado em: 2004
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11. "Fabricação e avaliação de microdispositivos para eletroforese com detecção eletroquímica" / "Fabrication and Evaluation of Electrophoresis Microdevices coupled with Electrochemical Detection"
This work describes the development of electrophoresis microchip fabricated by direct-printing and photolithographic processes. The channel structures of the devices fabricated by direct-printing process are defined by polyester films (base and cover) and by a toner layer (walls). The characterization of toner surface and composition were necessary for a bet
Publicado em: 2004
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12. Blendas de SAN/NBR: influência do teor de acrilonitrila da borracha nitrílica nas propriedades físico-química e mecânicas
Aiming the development of polymer materials with high toughness, poly(butadiene-coacrylonitrile) rubbers (NBRs), with acrylonitrile (AN) contents varying from 32,9 to 45,7%, were added to poly(styrene-co-acrylonitrile) (SAN) by casting, mini-extrusion and monoscrew extrusion followed by injection molding. Addition of NBR resulted in significant improvements
Publicado em: 2003