Scanning Eletron Microscopy
Mostrando 1-11 de 11 artigos, teses e dissertações.
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1. Microstructural orientation of isotactic polypropylene studied by computerized scanning eletron microscopy image analysis
We evaluate the orientation of microstructural elements of isotatic polypropylene (i-PP) before and after deformation using computerized “Quantikov” software analysis of Scanning Electron Microscopy (SEM) images. We observed that before deformation through uniaxial compression, the polymeric material doesn’t exhibit any significant orientation. After d
Publicado em: 2010
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2. Efeito do tipo de cimento de fixação e configurações de retentores intra-radiculares na adesão à dentina radicular em diferentes profundidades
Este estudo avaliou o efeito do tipo de cimento de fixação e da configuração de retentores intra-radiculares na adesão à dentina intra-radicular em diferentes profundidades. Cento e vinte raízes receberam tratamento endodôntico e foram aliviadas para fixação de retentores intra-radiculares de fibra de vidro nas configurações: serrilhado/paralelo
Publicado em: 2007
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3. Pilot study of the adhesion between Ni-Cr alloys and ceramics when prosthetic variables were accomplish / Efeito das variáveis laboratoriais protéticas na adesão da porcelana com ligas de níquel-cromo
The metalceramic crowns are usually used in dentistry because they provide a resistant structure due to its metallic base and its aesthetics from the porcelain that recovers this structure. To manufacture these crowns, a series of stages should be accomplished in the prosthetic laboratories, and many variables can influence its success. Changes in these vari
Publicado em: 2006
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4. Taxonomic and morphoanatomical studies in (Poaceae: Bambusoideae: Bambuseae) / Estudos taxonomicos e morfoanatomicos em Colanthelia (Poaceae: Bambusoideae: Bambuseae)
Five new species of Colanthelia from Brazil, C. gracillima Dusén ex Santos-Gon. &Filg., C. itatiaiae Santos-Gon. &L. G. Clark, C. longifolia Santos-Gon. &Filg., C. sparsiflora Santos-Gon. &Filg. and C. secundiflora Santos-Gon. &L. G. Clark are here described and illustrated. The names Arundinaria gracillima Dusén and Colanthelia gracillima Dusén are recog
Publicado em: 2005
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5. Efeitos de adições de Cr2O3, NiO e ZnO sobre a formação do clínquer Portland e de adições de Al2O3 e Fe2O3 sobre a decomposição de seu composto majoritário
The co-processing of residues in cement kilns is in current days ones of the main solutions adopted for the final disposal of industrial residues. Part of this work has for objective to determine the effect of additions of Cr2O3, NiO and ZnO on the formation of main composites of the Portland cement clinker, aiming at to the co-processing of industrial resid
Publicado em: 2005
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6. Durabilidade de argamassas modificadas por polimeros e reforçadas com fibras vegetais / Durability of fiber-cement polimer modify
Several researches on vegetal-fiber-cement composites have been developed aiming to solve problems related to the banishment of asbestos and environmental damages due to deposition or burnirng of agro-industry residues. The durability of the cellulose-cement composites is a key factor to introduce such material in the market. Several researches have been dev
Publicado em: 2004
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7. Microstructural orientation of isotactic polypropylene studied by computerized scanning eletron microscopy image analysis
We evaluate the orientation of microstructural elements of isotatic polypropylene (i-PP) before and after deformation using computerized "Quantikov" software analysis of Scanning Electron Microscopy (SEM) images. We observed that before deformation through uniaxial compression, the polymeric material doesn’t exhibit any significant orientation. After defor
Materials Research. Publicado em: 2001
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8. Blendas de poli (metacrilato de metila-co-metacrilato de glicidila) e poli (butadieno-co-acrilonitrila)
Blends of poly(butadiene-co-acrylonitrile) (NBR) and poly(methyl methacrylate-co-glycidil methacrylate) P(MMA-co-GMA) were prepared aiming analysing its phase behavior and characterizing these materiaIs by their structural, thermal mechanical thermo-mechanical and morphological properties as a function of NBR composition and crosslinking degree. P(MMA-co-GMA
Publicado em: 1995
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9. Quimica do estado solido : preparação, caracterização, comportamento termico e reações topoquimicas em tiometalatos do tipo AM52 (A=K, Ag, Ba e M=Fe)
This is a study on the preparation, characterization, ion-exchange and thermal bahavior of iron potassium sulfide, KFeS2. The structure of this solid is basically composed by edge-sharing FeS4 tetrahedra forming negatively charged linear chains [FeS2]n. Potassium ions act as counter-ion. The Fe-Fe distance within the chains is greater than the distance betwe
Publicado em: 1993
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10. Sintese e caracterização do composito poli (3-metil-tiofeno)/borracha nitrilica
The electrochemical synthesis of a poly(3-methyl-thiophene)/nitrilic rubber composite was developed in this work. The effect of the synthesis conditions on the electrochemical properties of the composites was analyzed using cyclic voltammetry. Chronoamperometry was utilized to compare the redox behaviour of the composite films with that showed by pure poly(3
Publicado em: 1991
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11. Obtenção e caracterização de metafosfatos de aluminio : um novo pigmento branco
Titanium dioxide is widle used as a white pigment, because it is a powerful light backscatterer due to its high refractive index. It may be predicted, following Mie s theory, that hollow particles of any refractive index may also be good scatterers. The subject of this thesis is the preparation and characterization of aluminum metaphosphates and the evaluati
Publicado em: 1991