Scaning Electron Microscopy
Mostrando 1-11 de 11 artigos, teses e dissertações.
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1. Biological Synthesis of Selenium Nanoparticles and Evaluation of their Bioavailability
ABSTRACT Nanoparticles due to their unique properties have attracted more attention and their bacterial biosynthesis is more favorable because is environmental friendly and the size and yield of nanoparticles can be optimized. The aim of the present study was biosynthesis of Selenium nanoparticles using Bacillus cereus. For this purpose, bacterial culture wa
Braz. arch. biol. technol.. Publicado em: 14/06/2018
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2. Quantificação de forças na manipulação de nano-objetos individuais em experimentos "in situ" de mocroscopia eletronica / Quantification of forces on the manipulation of individual nano-objects in "in situ" experiments of electron microscopy
O estudo de nano-sistemas tem atraído grande atenção nos últimos anos, principalmente devido às suas possíveis e novas aplicações tecnológicas. Muitos esforços têm sido feitos nessa área, porém há ainda várias questões em aberto com relação à compreensão de nanoestruturas. Um dos principais desafios diz respeito à manipulação e o posic
Publicado em: 2010
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3. Nanofibres characterization through image processing techniques. / Caracterização de nanofibras através de técnicas de processamento de imagens.
The electrospinning technique represents a simple and convenient process to provide polymers and ceramics bers with both solid and hollow interiors that are exceptionally long in length, uniform in diameter, varying within the interval of few nanometers to several microns, and diversied in composition. Despite the versatility and potencially the scanning ele
Publicado em: 2009
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4. Electroplating, Characterization and Studies of Corrosion Layers of Ni-Mo-P / Eletrodeposição, Caracterização e Estudos de Corrosão de Camadas de Ni-Mo-P
The present work describes the electrodeposition and characterization of the Ni-Mo-P coatings as well their corrosion behavior in 0.1 mol L-1 NaCl solution. The coatings were obtained by under galvanostatic control in the range of 25 mA cm-2 to 100 mA cm-2 and at the following plating solutions temperatures: room temperature (@ 27 C), 50 C and 70 C. As-elect
Publicado em: 2009
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5. Avaliação de matrizes tridimensionais colagênicas como carreadores celulares para a bioengenharia óssea / Evaluation of three-dimensional collagenic matrices as cellular scaffolds to bone bioengineering
The therapy of bone defects constitutes one of the great challenges of the medicine and dentistry. Although autogenous is considered "gold standart", presents limitations as the necessity of second surgical site, limitation of bone availability and lack of previsibility. Tissue bioengineering appeared as a promising treatment for critical bone defects conjug
Publicado em: 2008
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6. Analysis in vitro and in vivo of the different forms of pplication of the self-etching adhesives systems / ANÁLISE IN VITRO E IN VIVO DE DIFERENTES FORMAS DE APLICAÇÃO DE SISTEMAS ADESIVOS AUTOCONDICIONANTES
The objective of this study was to evaluate the effect of different modes of application (active vs. inactive) of one step self-etch adhesives under in vitro conditions (resindentin bond strength [BS] and nanoleakage under Scaning Electron Microscopy [SEM]) and in vivo conditions (in non carious class V restorations) in the immediate [IM] and 6 month period
Publicado em: 2008
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7. Self etching primers applied in the enamel: adhesive bond strength, interface morphology, etch pattern in relation the treatment and substrate / "Sistemas adesivos autocondicionantes aplicados no esmalte: avaliação da resistência de união, morfologia de interface e padrão de condicionamento em função do tratamento e substrato"
Este estudo teve como objetivo verificar a possibilidade de utilizar o esmalte bovino, em teste resistência de união, substituindo o esmalte humano, bem como, analisar a resistência de união, morfologia de interface e padrão de condicionamento de sistemas adesivos autocondicionantes aplicados ao esmalte intacto e asperizado. Foram usados 40 dentes human
Publicado em: 2007
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8. Aspectos fisiolÃgicos e anatÃmicos das sementes e do desenvolvimento inicial de Eugenia pyriformis Camb. / Physiological and anatomical aspects of seeds and initial development of Eugenia pyriformis Camb. seedlings. 2006. 225 p. Thesis (Doctor degree in Agronomy/Plant Physiology) - Universidade Federal de Lavras, Lavras, MG. *
Sementes recalcitrantes perdem a viabilidade quando sÃo dessecadas. Existem vÃrios mecanismos de tolerÃncia à dessecaÃÃo que foram revisados neste trabalho sob uma abordagem ecolÃgica, fisiolÃgica e evolutiva. As sementes de Eugenia pyriformis Camb. (Myrtaceae) sÃo recalcitrantes e foram estudadas quanto ao desempenho germinativo e a alteraÃÃes ul
Publicado em: 2006
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9. A subplacenta da paca (Agouti paca, Linnaeus 1766) / The subplacenta of the paca (Agouti paca, Linnaeus 1766)
The rodents of suborder hystricomorph, in which is classified the Agouti paca, present hemochorial type placentation and develops an unique structure known as subplacenta. In spite of many report of its presence in several species, the possible functions of this structure related to placenta and pregnancy remains speculative, mainly due to the diversity of f
Publicado em: 2005
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10. Efeito da aplicação tópica de peróxido de hidrogênio sobre a superfície e interface esmalte: restaurações odontológicas
This study intends to analise the superficial roughtness and the interface between amalgam, glass ionomer cement, compomer, porcelain and gold, after the 35% hidrogen peroxide aplication, through bidimensional perfilometry and scaning electron microscopy. There were used 36 human bicuspids, wich had class V cavity in their buccal surfaces. This cavities were
Publicado em: 2003
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11. Estudo da tecnica de espectroscopia de impedancia eletroquimica na analise dos copolimeros de enxerto PEBD-g-AAm
This work discribes the study of the Eletrochemical Impedance Spectroscopy technique -(EIS)-, applied to the analysis of copolymers prepared by grafting acrylamide monomers onto low density polyetilene matrices (LDPE -g-AAm). LDPE films were used as substract for acrylamide grafting at 5, 20, and 131%. The grafting copolymers were obtained by ionizing radiat
Publicado em: 1994