Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
We consider self-affine tiling substitutions in Euclidean space and the corresponding tiling dynamical systems. It is well-known that in the primitive case the dynamical system is uniquely ergodic. We investigate invariant measures when the substitution is not primitive, and the tiling dynamical system is non-minimal.…
A complex of samrium perchlorate with L-alpha-Valine acid, [Sm-2(L-alpha-Val)(4)(H2O)(8)](ClO4)(6), was synthesized by the reaction of samarium perchlorate and L-alpha-Valine acid in distilled water. The title complex was characterized by chemical analysis, elemental analysis, FTIR and TG/DTG. Low-temperature heat cap…
The synergistic inhibition effect of rare earth Ce(superscript 4+) and vanillin (4-hydroxy-3-methoxy-benzaldehyde) on the corrosion of cold rolled steel (CRS) in 3.0 mol/L H3PO4 solution was studied by mass loss, potentiodynamic polarization and UV-Vis spectrophotometry (UV-Vis). The present study reveals that vanilli…
The electrospinning ployacrylonitrile nanofibers membrane (PANNFM) is hydrolyzed to prepare the hydrolyzed polyacrylonitrile nanofibers membrane (HPANNFM), and it is used as an adsorbent to remove and recovery copper ions from the aqueous solution. The samples before and after hydrolysis are characterized with FE-SEM…
O açaí é fruto do açaizeiro, uma palmeira natural da Amazônia brasileira, encontrada próximo dos igarapés. Na região Norte existe um grande consumo da polpa do fruto do açaí, com um acúmulo de resíduo sem manejo adequado. Este resíduo provoca malefícios para a saúde pública e transtornos ambientais. No presente trabal…
Learning electromagnetic field theory through abstract mathematical equations alone is a challenging task to most students. They look upon the subject as a difficult, abstract, and highly mathematical matter. The author has thus developed a modeling and simulation tool with special features designed for teaching elect…
A carbon nanotube (CNT) Schottky diode based on coaxial geometry is presented. We show that coaxially gated CNT field effect transistors (FETs) with a p-type semiconducting single-walled carbon nanotube (s-SWNT) and asymmetric contacts can provide good diode characteristics. The effect of different physical and electr…
X-ray powder diffraction (XRD) along with differential thermal analysis (DTA) carried out on the as-quenched samples in the 3BaO-3TiO2-B2O3 system confirmed their amorphous and glassy nature, respectively. The dielectric constants in the 1 kHz-1 MHz frequency range were measured as a function of temperature (323-748 K…
"n "n "nBackgrounds and Objectives: Carcinogenic and mutagenic potential of some azo dyes as a category of common dyes in different types of industries has been reported. The degradation of one commercially available dyestuff [C.I. Reactive Red 198 (RR 198)] by means of ultraviolet radiation (UV), ultrasonic irradiati…
Este trabalho esta relacionado a pesquisa sobre principios de hidraulica para aplicacao no dimensionamento de sistema de hidrantes prediais. Procura-se demonstrar a importância do estudo da hidraulica para o dimensionamento de sistema de hidrantes, bem como para o desenvolvimento de normas e especificacoes relativas a…
The frequency and temperature dependence of the dielectric constant, electric modulus and electrical conductivity of the transparent glasses in the composition 0.5Li2O-0.5Na2O-2B2O3 (LNBO) were investigated in the 100 Hz - 10 MHz frequency range. The dielectric data have been analyzed using Cole-Cole equation with an…
We analyze the heat capacity CP for low and high-density amorphous ice below the transition temperature (TC ≈ 140 K ) using a power-law formula. The renormalized critical exponent αR is extracted from the observed CP data, which describes similar critical behavior for both low and high-density amorphous ice below TC.…
Friction Stir Welding (FSW) is a suitable technology for aerospace structure development and is a possible replacement for mechanical fastening. To achieve the application of FSW, pre and post-weld treatments are required. A pre-weld treatment of surface preparation was required to ensure a weld with good mechanical p…
The effect of cadmium substitution and sintering temperature on the microstructure and dielectric properties of nano ZnCd x Fe 2-x O 4 ferrites (x=0.0, 0.05, 0.1, 0.2, 0.3 and 0.5) has been investigated and prepared by egg-white technique. Electrical conductivity and dielectric measurements have been analysed in the f…
The aim of this work is to correlate the results of experimental data by using the differential thermal analysis (DTA) method and predictions of artificial neural networks (ANNs). Thermal decomposition of potassium nitrate ( KNO 3) and benzoic acid ( C 6 H 5 COOH ) have been analyzed by the simultaneous DTA method. Ki…
The gyromagnetic factors for Fe3+in ZnX ( X = O , S , Se , Te ) are theoretically studied from the perturbation formula of the g-factor for a 3d5ion in tetrahedra based on inclusion of both the crystal-field and the charge-transfer contributions. The related model parameters in the calculations are determined from the…
We discuss nanoclusters of titanium dioxide, bulk CdTe and CS2 as characteristic materials to illustrate two main ideas; firstly, it is possible to argue about the origin of the nonlinearity even with a high repetition laser, provided that you have as large a peak power (50 kW) as the one found in femtosecond lasers.…
Abstract We synthesized a mto (= monothiooxalato)-bridged hetero-metal complex, Ph4P[ZnIIFeIII(mto)3] consisting of FeIIIO3S3 and ZnIIO6 octahedra and investigated its physical properties. Ph4P[ZnIIFeIII(mto)3] has a two-dimensional honeycomb network structure. The ESR and 57Fe Mössbauer spectra revealed that the rapi…
Abstract (E)-3-{4-[Bis(4-tert-butylphenyl)amino]phenyl}-2-cyanoacrylic acid and its related compounds were synthesized by the Knoevenagel condensation of the corresponding 4-aminobenzaldehydes with cyanoacetic acid. Cyclic voltammetry measurements showed that these organic dyes exhibited reversible oxidation waves. Th…
Abstract A new luminescent zinc(II) complex with indolo[2,3-b]tropone ligand has been synthesized and studied with respect to its electrochemiluminescence (ECL) properties for the first time. We observed a distinct blue-green ECL emission from this compound during electrochemical reduction in dimethyl sulfoxide (DMSO)…