Materials Literature
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Foi avaliada a inclusão de níveis crescentes de feno de flor-de-seda (Calotropis procera SW) (FFS) em substituição ao feno de sorgo forrageiro (Sorghum bicolor, L.) (FSF) na dieta e seus possíveis efeitos sobre os rendimentos verdadeiro, biológico e comercial, a perda ao resfriamento, o rendimento dos cortes, a compos…
This is the seventh paper outlining a holistic model of atmospheric corrosion. Previous papers have outlined how airborne salinity can be estimated at any given location, how salt deposition onto a surface can be modelled and what forms moisture can take on a plate surface. The present paper develops a model for rain…
Among the seven different forms of (±) modafinil, form I is the most stable variety (at whatever the temperature, T ), and form III is very close to form I in terms of lattice energy. Under high-energy milling (HEM), every modification converts into a defective form III. The inversion of “stability” between form I and…
Realizou-se o levantamento florístico das Coscinodiscophyceae, Fragilariophyceae e Bacillariophyceae (Achnanthales) dos rios Ivaí, São João e dos Patos, pertencentes à bacia hidrográfica do rio Ivaí, município de Prudentópolis, Paraná. Quarenta e uma amostras foram coletadas em março, junho e julho/2002 e janeiro/2003…
Nanotechnology is a rapidly evolving interdisciplinary field based on the manipulation of matter on a submicron scale, encompassing matter between 1 and 100 nanometers (nm). The currently registered nanotechnology patents comprise 35 countries being involved in the global distribution of these patents. Close to 3000 p…
The surface properties of a plastic substrate were changed by a novel surface treatment called atomic hydrogen annealing (AHA). In this method, a plastic substrate was exposed to atomic hydrogen generated by cracking hydrogen molecules on heated tungsten wire. For the substrate, surface roughness was increased and hal…
A simple approach is proposed for fabrication of percolated perpendicular media (PPM). Nano pore array with pore diameter of 12-15 nm and different pore densities has been prepared by anodizing aluminum on silicon wafers. The pore density increases from 3.2times1010cm-2to 11.0times1010cm-2with the decrease in anodizin…
A series of meso-tetrakis-(ERE donor) zinc(II) porphyrins nZn (ERE donor = 4-R-3,5-bis[(E)-methyl]phenyl; 1Zn: E = NMe2, R = Br; 2Zn: E = NMe2, R = H; 3Zn: E = OMe, R = Br; 4Zn: E = OMe, R = H) have been synthesized in excellent yields. As a result of the combination of a Lewis acidic site and eight Lewis basic sites…
The polyaniline-polyvinyl sulfonate-glucose oxidase (PANI-PVS-GOD) electrode has been investigated in the present work. Indium tin oxide (ITO) coated glass electrode was used for the synthesis of polyaniline-polyvinyl sulfonate (PANI-PVS) film using potentiometric method with 0.2 M aniline, 0.5 M PVS solution, 1.0 pH…
Abstract A dark brown single crystal of rubidium manganese hexacyanoferrate, Rb 0.61 Mn[Fe(CN) 6 ] 0.87 ·1.7H 2 O, was obtained by the slow diffusion method. X‐ray single crystal analysis showed that this compound crystallized in the cubic system of space group $Fm{\bar 3}m$ with cell constants of a = b = c = 10.5354(…
TiO 2 thin films are obtained by dc reactive magnetron sputtering. A target of titanium (99.995%) and a mixture of argon and oxygen gases are used to deposit TiO 2 films on to silicon wafers (100). The crystalline structure of deposited and annealed film are deduced by variable-angle spectroscopic ellipsometry (VASE)…
This article investigated the elastic response of natural rubber (NR) compounds filled with silica from fly ash particles (FASi) and commercial precipitated silica (PSi), through a dynamic rebound test. The effects of silica content and initial drop‐height on the height and number of rebounds, dynamic stiffness, and t…
Vapor-phase deposition and characterization of covalently bound polymer coatings using type II surface photoinitiation of the monomers (dimethylamino)methyl styrene (DMAMS) and (diethylamino)ethyl acrylate (DEAEA) are reported. Grafting chemical vapor deposition (gCVD), a solventless, low-temperature process, was firs…
Bioinspired molecular self-assembly is a popular route to novel functional materials for industrial applications. Here we explore, for the first time, the possibility of using organogel and hydrogels of short self-assembling β-sheet-forming peptides, as starting states for the creation of nanostructured peptide aeroge…
Abstract High-Cr ferritic/martensitic steels are being considered as structural materials for a large number of future nuclear applications, from fusion to accelerator-driven systems and GenIV reactors. Fe-Cr alloys can be used as model materials to investigate some of the mechanisms governing their microstructure evo…
The authors have studied the electronic structure of potassium doped copper-phthalocyanine using electron energy-loss spectroscopy. The evolution of the loss function indicates the formation of distinct KxCuPc phases. Taking into account the C1s and K2p core level excitations and recent results by Giovanelli et al. [J…
Epitaxial single-crystal chemical-vapor-deposited diamond with (100) crystal orientation is obtained from Element Six (Ascot, United Kingdom) and Apollo Diamond (Boston, Massachusetts). Both companies supply 5×5-mm squares with thicknesses of 0.35 to 1.74 mm. Element Six also provides disks with a state of the art dia…
We propose an explanation for the anomalous compressibility maximum in amorphous silica based on rigidity arguments. The model considers the fact that a network structure will be rigidly compressed in the high-pressure limit, and rigidly taut in the negative pressure limit, but flexible and hence softer at intermediat…
Ultra linear silicon-on-glass varactor topologies with improved power handling and linearity have been realized. The resulting components include integrated bias networks and provide excellent low-loss performance for large capacitances (e.g. C=20pF Q>100 at 2 GHz with Vcont=2 V). Using a novel center tap circuit the…
Single zinc oxide (ZnO) nanopillars grown by the vapor-liquid-solid process on a-plane sapphire are investigated by spatially resolved cathodoluminescence on the nanometer scale in a scanning electron microscope. Spectra were recorded by exciting luminescence along single pillars and across the underlying wetting laye…