Materials Literature
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This research investigates the impact resistance of concrete slabs with different volume perecentage replacement ratios of waste plastic fibers (originaly made from soft drink bottles) as follows : 0.5%, 1% and 1.5%. Reference mix produced in order to compare the result. For the selected mixes, cubes with (100×100×100…
Azo dyes are the dominant types of synthetic dyes, widely used in textiles, foods, leather, printing, tattooing, cosmetics, and pharmaceutical industries. Many microorganisms are able to decolorize azo dyes, and there is increasing interest in biological waste treatment methods. Bacterial azoreductases can cleave azo…
Abstract Reconstructing the origin of bentonitic clays is often a challenging and rather complicated undertaking, but the analysis of certain predictor clay minerals is proving to be an excellent method to simplify this process. The goal of the present investigation was to use abundance changes of five X-ray diffracti…
We report on cavity swelling at peak damage regions of three ferritic-martensitic (FM) steels (NHS, RAFM and T91) irradiated by 196 MeV Kr ions at different temperatures (450/550°C). Cavity configurations of the irradiated specimens are investigated by transmission electron microscopy with cross-section technique. For…
Estudos com Espodossolos de ambientes tropicais de tabuleiros costeiros ainda são escassos. Este trabalho visou caracterizar perfis desses solos, tanto nos tabuleiros como em uma restinga nos Estados da Paraíba e do Pernambuco, Nordeste do Brasil. O estudo foi realizado com 14 perfis, inseridos em relevo predominantem…
Energetic and geometric aspects of the permeation of the atoms hydrogen to neon neutral atoms through graphene sheets are investigated by investigating the associated energy barriers and sheet deformations. Density functional theory calculations on cluster models, where graphene is modeled by planar polycyclic aromati…
Abstract The corrosion inhibition of aluminium alloy in 0.5M H 2 SO 4 solution in the presence of zinc gluconate at 301 K was investigated using weight loss and an electrochemical method. Surface analysis of the aluminium alloy sample was reviewed by a high resolution scanning electron microscope equipped with energy…
Films of methyl cellulose (MC) /chitosan blends were prepared via solution casting technique and their properties with different amount of ammonium trilate, NH 4 CF 3 SO 3 were compared. Measurements of conductivity as a function of frequency at room temperature on these films were carried out using HIOKI 3532-50 LCR…
The potential energy surfaces (PES) of the elementary catalytic cycle of early stages of the H 2 + MAl 12 reaction of dissociative addition of an H 2 molecule to aluminum clusters MAl 12 doped with “light” 3 d and 4 d transition metal atoms (Sc, Y, Ti, Zr, V, Nb) in the states of different multiplicity have been calcu…
In this letter the validity of the fluid model used to simulate the electrical breakdown in air at low pressure is discussed. The new method for the determination of the ionization source term for the mixed gases is proposed. Paschen's curve obtained by the fluid model is compared to the available experimental data. T…
In-homogeneities, impurities, weakness within the insulating material or improper positioning of the electrode across insulator causes uneven electric field distribution into the localized area, which often creates partial discharge (PD) and are common mainly in high voltage power apparatus. After initiation of partia…
We reported the magnetic phase diagram of the Ca 1− x Sr x Co 2 As 2 system by measuring the transport and magnetic properties of the single crystals. Its ground state evolves from A-type antiferromagnetism (AFM) with large anisotropy for CaCo 2 As 2 to ferromagnetism with spins aligned along the c -axis for Ca 0.8 Sr…
The results are reported of an experimental study of samples of organic light-emitting diodes (OLEDs) with luminescent layers fabricated on the basis of two types of CdSe/CdS/ZnS semiconductor quantum dots (QDs) with average CdSe core diameters of 3.2 and 4.1 nm and the same overall diameters of 6.5 nm. The dependence…
We report the magnetic and transport properties of the Ru1−xFexSb2 solid solution, showing how the colossal thermoelectric performance of FeSb2 evolves due to changes in the amount of 3d vs. 4d electron character. The physical property trends shed light on the physical picture underlying one of the best low-T thermoel…
Chicken feet can be used as an alternative source of collagen for the development of new products. In this sense, the aim of this study was the production of a product similar to gelatin from collagen extracted from chicken feet and the evaluation of sensory quality. The products were produced in two distinct flavors,…
The nature of dielectric echoes in amorphous solids at low temperatures is investigated. It is shown that at long delay times the echo amplitude is determined by a small subset of two level systems (TLS) having negligible relaxation and decoherence because of their weak coupling to phonons. The echo decay can then be…
The review is devoted to the description of fundamental properties of Pu based on ab initio and classical molecular-dynamics microscopic theories which could be linked to each other. The details of various methods such as LSDA, LDA + U, LDA + U + SO, LDA + DMFT, CMD, MEAM, and GEAM are presented. The results obtained…
In recent years we are witnessing an intensive integration of bio-organic nanomaterials in electronic devices. Here we show that the diphenylalanine bio-molecule can self-assemble into tiny peptide nanodots (PNDs) of ∼2 nm size, and can be embedded into metal-oxide-semiconductor devices as charge storage nanounits in…
Abstract Composites based on ZnS nanparticles embedded in layered magadiite were synthesized via a three step process : protonation of Na-magadiite, ion exchange in order to introduce Zn(NH 3 ) 4 2+ in the interlayer space, and addition of Na 2 S to form ZnS particles in the interlayer space of magadiite. The composit…
Possibility and conditions of obtaining cerium-containing oxide coatings on titanium alloys by microarc oxidation in electrolytes with tartrate and citrate cerium complexes were determined. The effect of organic cerium complexes on the kinetic parameters of the microarc oxidation of titanium alloys was studied. Porous…