Amorphous Substances
Mostrando 1-12 de 13 artigos, teses e dissertações.
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1. 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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2. Avaliação da capacidade de remoção da camada residual dentinária com o uso do Endo PTC em diferentes formulações, associado a duas concentrações de hipoclorito de sódio, utilizando ou não irrigação final com EDTA. / Evaluation of the ability to remove the smear layer of dentin with the use of Endo PTC in different formulations, combined with two concentrations of sodium hypoclorite, with or without final irrigation with EDTA.
The action of the instruments on the walls of the root canal provides the smear layer development, which is an extract of organic and inorganic matter, with amorphous appearance, irregular and granular surface which is set down on the dentin surface in the measure that its formation occurs, and when it is not removed, can interfere on the desired sealing dur
Publicado em: 2010
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3. Estudo das alterações da membrana celular de microrganismos por compostos de inclusão de clorexidina: beta-ciclodextrina em diferentes proporções molares usando Microscopia de Força Atômica e Microscopia Eletrônica de Varredura
The formation of inclusion compounds of chlorhexidine for the controlled release of antimicrobials has shown decreasing in therapeutic concentrations effective. However, a lack of studies has been published about the mechanism which was inclusion compounds increase cellular permeability through the microorganisms membrane. Thus the objective of this work was
Publicado em: 2008
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4. 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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5. Obtenção e caracterização de filmes de TiO2 depositados sobre cerâmica de revestimento via magnetron sputtering DC
Titanium oxide (TiO2) under ultraviolet light becomes catalyst of chemical reactions. This phenomenon can be used to break down hydrocarbon and water molecules bound. Hydrocarbon was changing into water and carbon dioxide. Adsorbed water molecule is degraded by film and form a layer of adsorbed hydroxyl groups (OH), which are able to increase surface energy,
Publicado em: 2007
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6. Linear and non-linear giant magnetoimpedance in amorphous alloys / Magnetoimpedancia gigante linear e não-linear em ligas amorfas
Não informado
Publicado em: 2005
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7. Silica Derived from Burned Rice Hulls
Three new processes to obtain silica having high specific surface area from burned pre-treated rice hulls are presented and discussed. These procedures allow for the simultaneous recovery of biomass energy and the production of high quality silica at thermoelectric plants, without the risk of using corrosive substances in the burning process. The first metho
Materials Research. Publicado em: 2002-10
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8. Obtenção de novos materiais pelo processo sol-gel : oxidos e fosfatos de ferro
Thermal and hydrotermal transformations of non-crystalline iron (III) hydroxoacetate (HAF), hydroxophosphate (HPF) and metaphosphate (MPF) were followed using these methods: iron (II) and total-iron determinations; infrared spectrophotometry; surface area and density measurements; Mössbauer, (VIS-UV) photoacoustic and electron spin resonance spectroscopies;
Publicado em: 1990
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9. Structure determination of gaseous and amorphous substances by diffraction methods: Philosophical concepts and their implementation (A Review)*
Structure determination by diffraction methods is reviewed in terms of the philosophical and mathematical aspects of the techniques used to investigate the atomic arrangements in gaseous and amorphous substances. Both theory and experiment must be adapted to each other's limitations. This is accomplished often only after much time and study have been devoted
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10. Development and structure of the extra-embryonic membranes of the ferret. A light microscopic and ultrastructural study.
Light and electron microscopic observations on the development and structure of the extra-embryonic membranes of the ferret are described. By day 16 of pregnancy trophoblastic villi consisting of a cytotrophoblastic core with a peripherally located phagocytic syncytiotrophoblast have penetrated deeply into the endometrium. During its invasion the syncytiotro
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11. Anaerobic Mineralization of Toluene by Enriched Sediments with Quinones and Humus as Terminal Electron Acceptors
The anaerobic microbial oxidation of toluene to CO2 coupled to humus respiration was demonstrated by use of enriched anaerobic sediments from the Amsterdam petroleum harbor (APH) and the Rhine River. Both highly purified soil humic acids (HPSHA) and the humic quinone moiety model compound anthraquinone-2,6-disulfonate (AQDS) were utilized as terminal electro
American Society for Microbiology.
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12. Microsensor Analysis of Oxygen in the Rhizosphere of the Aquatic Macrophyte Littorella uniflora (L.) Ascherson.
Oxygen released by the roots of submerged plants may oxidize organic compounds from the roots and reduced substances continuously supplied by diffusion from the surrounding anoxic hydrosoil. We provide here the first visualization of this gradient environment obtained by microsensor analysis of oxygen in the rhizosphere of the freshwater plant Littorella uni