Crosslinked Resins
Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. Shrinkage reduction in dental resins and composites by addition of polymeric crosslinked nanoparticles / Redução da contração de polimerização em resinas e compositos odontologicos pela adição de nanoparticulas polimericas reticuladas
Neste estudo foi avaliado o efeito da adição de nanopartículas poliméricas reticuladas (nanogéis) em resinas e compósitos odontológicos baseados em dimetacrilatos na contração volumétrica de polimerização. As partículas poliméricas foram sintetizadas utilizando mistura dos monômeros uretano dimetacrilato e isobornil metacrilato (razão 30:70 m
Publicado em: 2009
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2. Evaluation of residual monomer, water sorption and porosity by acrylic resins used to eye prostheses / Avaliação da liberação de monômero residual, absorção de água e porosidade superficial em resinas acrílicas para prótese ocular
This comparative evaluation of porosity, water sorption and residual monomer presented by acrylic resins was conducted, looking for excellence and rapidity in the confection of eye prostheses. Four groups, comprising of 15 specimens each, were established and submitted to polymerization cycles: Group 1 - conventional heat polymerizing acrylic resin / convent
Publicado em: 2008
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3. Materiais compósitos biocidas baseados em resinas reticuladas contendo nanopartículas de prata / Biocide composite materials based on crosslinked resins containing silver nanoparticles
Nesta dissertação, duas resinas reticuladas comerciais (denominadas, AmberliteGT73 e AmberliteIRC748) foram empregadas para suportar partículas de prata. Os grupos tiol da GT73 e ácido iminodiacético da IRC748 presentes nessas resinas foram empregados para a fixação de íons Ag+ a partir de solução aquosa. Posteriormente, os íons Ag+ foram reduzido
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/04/2007
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4. Ligninas acetosolv e formacell de eucalipto e de bagaço de cana : isolamento, fracionamento, caracterização e uso como componente de resinas fenolicas do tipo resol
Lignins are naturally-occuring polyphenols with a crosslinked structure. The general properties and the nature of the functional groups in lignins depend both on their source and on the extraction process. Lignins from eucalyptus wood and sugar-cane bagasse were isolated by the Acetolsov (EAc and BAc) and the Formacell (EFo and BFo) pulping processes. A grea
Publicado em: 1996
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5. Desenvolvimento e caracterização de imunosorventes e avaliação de desempenho em ensaios imunoenzimaticos
In this work the characterization of a new type of support for the immobilization of antigens and antibodies was initiated. This support that was firstly described by Bittencourt et al in 1983, consists of synthetic fabrics coated with crosslinked resins containing N-methylol groups able to form covalent bonds, with functional groups such as hydroxil and ami
Publicado em: 1986
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6. Preparation and Evaluation of Differently Sulfonated Styrene–Divinylbenzene Cross-linked Copolymer Cationic Exchange Resins as Novel Carriers for Drug Delivery
The differently sulfonated styrene–divinylbenzene cross-linked copolymer cationic exchange resins were prepared by oil-in-water polymerization and varied degrees of sulfonation. Several characteristics of the obtained resins were evaluated, i.e., Fourier transform infrared spectra, the ion-exchange capacity, microscopic morphology, size, and swelling. The
Springer US.
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7. Solid-phase synthesis of polynucleotides. IV. Usage of polystyrene resins for the synthesis of polydeoxyribonucleotides by the phosphostriester method.
Contrary to the expectation, the Merrifield polystyrene resin, 2% cross-linked by divinylbenzene, is as efficient as the polyacrylmorpholide resin for the synthesis of polydeoxyribonucleotides using a phosphotriester method. On the Merrifield resin, the tetradecamer, dTpCpGpTpCpApApCpTpGpGpCpTpT, and the hexadecamer, dCpCpApGpTpCpApCpGpApCpGpTpTpGpT, were sy
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8. Atomic force microscopy study of the secretory granule lumen.
We have used an atomic force microscope to study the mechanical properties of the matrix found in the lumen of secretory granules isolated from mast cells. The matrices were insoluble and had an average height of 474 +/- 197 nm. The volume of these matrices increased reversibly about tenfold by decreasing the valency of the bathing external cation (La3+ < Ca