Ethyl Methacrylate
Mostrando 13-24 de 24 artigos, teses e dissertações.
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13. Comparative morpho-anatomical studies of the lesions caused by citrus leprosis virus on sweet orange
The leprosis disease shows a viral etiology and the citrus leprosis virus is considered its etiologic agent. The disease may show two types of cytopatologic symptom caused by two virus: nuclear (CiLV-N) and cytoplasmic (CiLV-C) types. The aim of this study was to compare the morpho-anatomical differences in the lesions caused by leprosis virus-cytoplasmic an
Anais da Academia Brasileira de Ciências. Publicado em: 2011
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14. Effect of solvents on the morphological characterization of enteric nanoparticles
Size and external and internal morphologies of nanoparticles and microparticles are very important on the design of drug devices for controlled release. Random enteric copolymers such as poly (methacrylic acid-co-ethyl acrylate) and poly (methacrylic acid-co-methyl methacrylate) were used to produce nanoparticles, which contain a model drug and could be empl
Materials Research. Publicado em: 2009
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15. Estudo da copolimerização em mini emulsão de metacrilato de metila/metacrilato de etila / Study of methyl methacrylate/ethyl methacrylate in mini emulsion copolimerization
Reduction of volatile organic compounds (VOC) usage is a constant environmental demand. Polymeric aqueous emulsion of low surfactant contends produced from direct miniemulsion synthesis are used with advantages to replace organic solvents media as well as aqueous emulsions of high surfactant concentration. Water as continuous phase and organic monomers with
Publicado em: 2008
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16. Quantificação de metacrilatos residuais e avaliação da liberação em saliva artificial a partir de resinas acrílicas para reembasamento imediato
This work reports the development of analytical methods, using High Performance of Liquid Chromatography (HPLC), to quantify unreacted monomers from dental reline autopolimerizing acrylic resins. The quantification of these unreacted methacrylates is directly related with theirs toxicity, once that these may not only be irritant to the mucosa, but may also c
Publicado em: 2008
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17. Análise histopatológica e perfil protéico de lesões causadas pelo Citrus leprosis virus tipo nuclear e citoplasmático em Citrus sinensis (l.) Osbeck / Histopathological analysis and proteic profile of lesions caused by Citrus leprosis virus nuclear and cytoplasmatic type in Citrus sinensis (L.) Osbeck
The citrus leprosis of citrus has been considered a disease of great economic importance to citrus producers due to the damage that it causes. The disease is responsible for lesions found in the twigs, leaves and fruits, and it may cause great losses to the untreated orchards. The citrus leprosis has viral etiology being the virus called Citrus leprosis viru
Publicado em: 2008
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18. Caracterização de látices acrílicos em função da neutralização de seus grupos carboxilas
Latexes based on acrylic acid, acrylamide, ethyl methacrylate, and ethyl acrylate were synthesized via emulsion polymerization with different monomer compositions. The resultant latices were thickened with different molar ratios of NaOH to acrylic acid and were analyzed in terms of acid‐basis titrimetry, turbidimetry, rheology, and tensiometry. Titrime
Publicado em: 2007
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19. In vitro bioactivity of PMMA-based composite in simulated plasma with albumin
A new composite of poly(methyl methacrylate) - co -(ethyl-hexyl-acrylate) filled with glass of composition (wt.%) 61,33% 3CaO.P2O5 - 23,03% SiO2 - 15,64% MgO was developed. The formation of CaP (calcium phosphate) layers on implants is crucial for their integration in bone. Simulated biological fluids to study in vitro formation of those layers do not usuall
Matéria (Rio de Janeiro). Publicado em: 2007
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20. New monomers obtained from glycidyl methacrylate, bisphenol A and 4,4-isopropylidenedicyclohexanol: synthesis, structural characterization and properties of composites for use as dental composite resins / Novos monômeros obtidos a partir do metacrilato de glicidila, bisfenol A e 4, 4 isopropilidenodicicloexanol : síntese, caracterização estrutural e propriedades de compósitos para utilização em resinas de restauração dental
Nowadays, composite resins are the direct restorative materials more important in dental clinical performance, due to their versatility and aesthetic excellence. Bis-GMA (2,2-bis[4(2-hydroxy-3-metacryloxypropoxy)phenil]propane) is the base monomer more frequently used in restorative composite resins. However, this monomer presents some disadvantages, such as
Publicado em: 2006
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21. Photophysical properties of polymers modified with light-emitting groups : crosslinked polyethylenes and poly (methyl methacrylate) / Propriedades fotofisicas de polimeros modificados com grupos emissores : polietilenos reticulados e poli (metacrilato de metila)
Fluorescent systems with interesting photophysical properties were the aim of this work. Fluorescent molecules sorbed into polymeric matrices can act as local probes for any mechanical processes that occur leading to changes in the optical response of the probe. In this work pyrene and a carbazole derivative were employed as fluorescent sensor for relaxation
Publicado em: 2006
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22. Polimerização por plasma de éter e ésteres orgânicos: caracterização e possíveis usos em microeletrônica. / Plasma polymerization of ethyl ether and ethyl or methyl acetate: film caracterization and microeletronic uses.
The aim of this work is to characterize thin films obtained by plasma polymerization of ethyl ether, ethyl or methyl acetate. The films were tested for adsorption of polar organic compounds in order to evaluate their use for sensors or preconcentrators manufacturing. It was tried plasma polymerization of pure reactants and mixtures of ethyl ether with oxygen
Publicado em: 2004
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23. Viability of pHEMA Hydrogels as Coating in Human Synovial Joint Prosthesis
In artificial joints, the bone part is usually substituted by a metallic component with high corrosion and strength resistance while the articular cartilage is replaced by a polymer. Use of thin layer of a compliant material acting as a bearing surface in human replacement joints has recently generated considerable interest. This work analyses the coating of
Materials Research. Publicado em: 2002-10
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24. Hidrogel sintetico para reparo de defeitos da cartilagem articular
This work shows a study carried out with synthetic hydrogels aiming the obtention of a biomaterial to be used in the repair of articular cartilage defects. Hydrogels samples of poly (2-hydroxy ethyl methacrylate) (polyHEMA) and blends of polyHEMA with cellulose acetate (CA) or poly(methyl methacrylate-co-acrylic acid) (poly(MMA-co-AA)) was obtained by therma
Publicado em: 1997