Passive Layers
Mostrando 1-12 de 22 artigos, teses e dissertações.
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1. Esfuerzo de corte en Interfaces Fe/Fe3O4
Abstract The mechanical stability of oxides formed on metallic alloys is a key concern in the determination of component susceptibility to the medium in contact and the applicability of the alloy to high temperatures and other extreme conditions. In this context, the energy of adhesion is a key parameter. Density functional Theory (DFT) and other atomistic m
Matéria (Rio J.). Publicado em: 19/07/2018
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2. A new technique of bladder neck reconstruction during radical prostatectomy in patients with prostate cancer
ABSTRACT Purpose: To evaluate continence after radical prostatectomy in prostate cancer patients, in whom a new method of the bladder neck reconstruction (BNR) using deep dorsal stitch was implemented (deep single stitch through all bladder layers directly dorsal to the bladder opening after “tennis racket” reconstruct
Int. braz j urol.. Publicado em: 2015-06
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3. Structural evolution and tectonic setting of the Porongos belt, southern Brazil
The SW–NE-striking Porongos belt, located between juvenile Neoproterozoic rocks in the west and the Dom Feliciano belt, characterized by intense reworking of older crust, in the east, comprises a greenschist to amphibolite-facies metavolcano-metasedimentary succession (Porongos sequence) of unknown age with some exposures of Palaeoproterozoic gneisses (Enc
Publicado em: 2011
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4. Desenvolvimento de conjunto membrana-eletrodos para célula a combustível de metanol direto passiva
Direct methanol fuel cells (DMFCs) without external pumps or other ancillary devices for fuel and oxidant supply are known as passive DMFCs and are potential candidates to replace lithium-ion batteries in powering portable electronic devices. This paper presents the results obtained from a membrane electrode assembly (MEA) specifically designed for passive D
Química Nova. Publicado em: 2010
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5. Obtenção de filmes passivantes de molibdato de amonio e nitrato de cerio para ligas de zinco eletrodepositadas / The attainment of passivating films of ammonium molybdate and cerium nitrate for alloys of zinc electrodeposits
The electroplated zinc alloy coatings present better corrosion resistance than pure zinc, but they need a posterior passive treatment aiming the reduction of the formation of white corrosion products. Chromate conversion process is the process that, until now, presents the best results as passive treatment for zinc alloy coatings, although it presents high t
Publicado em: 2005
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6. Infectious bursal disease virus: case report and experimental studies in vaccinated and unvaccinated SPF chickens and commercial broiler chicks
IBDV Gm 11 (Simbios eleven-molecular group) has been detected since 1997 in many farms of commercial broilers and layers causing high mortality (2 to 15%) and severe macro and microscopic damage in cloacal bursae, spleen, thymus, kidney and liver. Five serial passages of 2050/97-Gm 11 IBDV sample by CAM route in SPF chicken's embryonated eggs did not elicit
Revista Brasileira de Ciência Avícola. Publicado em: 2004-03
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7. Mecanismos de confinamento e suas implicações no reforço de pilares de concreto por encamisamento com compósito de fibras de carbono / Confinement effects and their implication on the strengthening of concrete columns by wrapping with carbon fiber composites.
This work deals with the effect of confinement in reinforced concrete columns strengthened with carbon fiber composites. By wrapping, it is possible to mobilize the passive confinement of the concrete, restricting its lateral expansion. With the confinement, the concrete shows substantial gains in resistance and ductility. An experimental analysis of circula
Publicado em: 2002
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8. CONTRÔLE HYBRIDE ACTIFPASSIF DES VIBRATIONS DE STRUCTURES PAR DES MATÉRIAUX PIÉZOÉLECTRIQUES ET VISCOÉLASTIQUES : POUTRES SANDWICH/MULTICOUCHES INTELLIGENTES
This thesis presents a numerical analysis of the structural vibrations damping obtained by passive, active and hybrid active-passive damping treatments. For that, a finite element model of a sandwich beam which layers can be elastic, piezoelectric or viscoelastic is presented. It is validated through comparisons with analytical, experimental and numerical re
Publicado em: 2000
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9. Molecular sieving through S layers of Bacillus stearothermophilus strains.
The permeability properties and the exclusion limits of the crystalline surface layers (S layers) of two selected strains of Bacillus stearothermophilus were investigated. Measurements were performed of passive solute uptake into the intracellular space of native or glutaraldehyde-treated sacculi. Native sacculi were prepared from whole cells by extracting t
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10. Simultaneous Influx and Efflux of Nitrate during Uptake by Perennial Ryegrass 1
Experiments with intact plants of Lolium perenne previously grown with 14NO3− revealed significant efflux of this isotopic species when the plants were transferred to solutions of highly enriched 15NO3−. The exuded 14NO3− was subsequently reabsorbed when the ambient solutions were not replaced. When they were frequently replaced, continual efflux of th
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11. An approach to electrical modeling of single and multiple cells
Previous theoretical approaches to understanding effects of electric fields on cells have used partial differential equations such as Laplace's equation and cell models with simple shapes. Here we describe a transport lattice method illustrated by a didactic multicellular system model with irregular shapes. Each elementary membrane region includes local mode
The National Academy of Sciences.
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12. Neural networks that learn temporal sequences by selection.
A model for formal neural networks that learn temporal sequences by selection is proposed on the basis of observations on the acquisition of song by birds, on sequence-detecting neurons, and on allosteric receptors. The model relies on hypothetical elementary devices made up of three neurons, the synaptic triads, which yield short-term modification of synapt