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。
The corrosive behavior of mild steel in 0.05 M and 0.1M HCl, 0.025 M and 0.05 M H2SO4 solutions containing different concentrations of N-(2-thiophenyl)-N/-phenyl thiourea (TPTU) was investigated using potentiodynamic polarization technique. The results obtained reveal that TPTU is an efficient anodic inhibitor in the…
On an expanded and crushed vermiculite, changes in chemical, mineralogical, and rheological properties of the mineral affected by microbial activity were investigated. Determination of the water content, grain size, X‐ray diffraction pattern, intercrystalline swelling with glycerol, layer charge, CEC, exchangeable cat…
Pure and homogeneous nanopowders of Ba1− x Sr x TiO3 with compositions x = 0, 0.10, 0.20, 0.25, 0.30 and 0.35 were prepared by a polymerized complex method based on the Pechini-type reaction route, wherein mixed solutions of citric acid, ethylene glycol, titanium isopropoxide, barium carbonate and strontium carbonate…
BaZr0.1Ti0.9O3 ceramics with grain sizes of 0.75 and 2.60 µm have been prepared via solid-state reaction. Optimum parameters for calcination and sintering have been found in order to obtain pure perovskite phase, high density ceramics and homogeneous microstructures. The dielectric data show a diffuse phase transition…
Diffusion-controlled stepwise polymerization of a linear polymer confined in nanoscopic slits is simulated through a Monte Carlo approach. A noticeable influence of the confinement on the kinetics is found. The confinement modifies both the spatial pair distribution function and the diffusive properties of the polymer…
N-acetyl-L-ornithine transcarbamoylase (AOTCase) is a new member of the transcarbamoylase superfamily that is essential for arginine biosynthesis in several eubacteria. We report here crystal structures of the binary complexes of AOTCase with its substrates, carbamoyl phosphate (CP) or N-acetyl-L-ornithine (AORN), and…
The Eshelby tensor is formulated for anisotropic linear nonlocal elasticity and nonlocal micropolar elasticity in a nonhomogeneous medium.The divergence of this tensor gives the configurational forces on geometric and physical defects in such a medium.Some examples of the Peach-Koehler force and the Mathison-Papapetro…
A variety of factors have served to bring nuclear technology to international attention as a viable option to meet a major fraction of the energy needs of the future. This has also brought the US policy since 1977 of a once‐through nuclear cycle into question. Such a process uses only about 5% of the energy content of…
ZnO varistor materials were prepared by a sol gel route with subsequent drying and calcination. Varistor discs fabricated from these materials were subjected to a two step sintering schedule. Therefore in a typical experiment, the samples were heated to 1000°C, then allowed to cool for over 30 min to 900°C and held th…
Treloar’s vision [ J. Textile Inst. 56, T359-T380 (1965)] of an ideal fiber intersecting the cylindrical yarn at all radii with the same (mean) frequency is not accurate and consequently the derived model does not correspondent to reality. This paper introduces a modified model of radial fiber migration in yarns and i…
The tensile and impact behavior of jute fabrics—polyester composites–were evaluated as a function of the fabric style (knitted or weaved cloths), fiber weight fraction, and direction of the applied load. The tensile properties of plain-weave-fabric-reinforced composites (PWF) were higher than those of plain weft knit…
Abstract The thermal, mechanical and thermo‐mechanical properties of polymer compositions, containing synthetic biodegradable polymers i.e. polylacide (PLA) and aliphatic‐aromatic copolyester (BTA), natural biopolyester n‐PHB and its synthetic atactic analog (a‐PHB) were investigated. Thermal properties of the polymer…
Abstract Carbon nanotubes (CNTs) have been grown aligned with the directions of electric fields in a DC plasma‐enhanced (DC PE) CVD process. The CNTs can be grown at various predefined angles with respect to the substrate. It is shown that the local electric field, even at the very surface of the substrates, can be in…
The La(Fe1−xCox)11.44Al1.56 system, with x values of 0, 0.04, 0.08, and 0.12, was investigated for its magnetocaloric potential. For selected values of Co doping, it was possible to cover a wide magnetic ordering temperature range, from 200 up to 370K, and reduce substantially the metamagnetic critical fields. At appl…
The authors have reported a novel Iron loss calculating method based on a loss-map of the magnetic materials. A distinctive feature of this method is that the Iron loss on the Inductors can easily be calculated In many kinds of converters. In this paper, a novel Iron loss calculating method of the ac filter inductor o…
A new class of bio-nanocomposites based on hybrid gelatin-perovskite hydrogels was prepared by mixing exfoliated perovskite-tetraalkylammonium species in aqueous suspensions with gelatin solutions. Colloidal nanosheets derived from the CsCa2Nb3O10 layered perovskite re-stacked in the gelatin solutions give bio-nanocom…
Abstract A coordination host recognized various aromatic peptides containing Trp and Tyr residues in a highly sequence-selective fashion. For example, two similar hexa-peptides, Ac-Ser-Gly-Ala-Trp-Trp-Ala-NH2 and Ac-Ala-Trp-Trp-Ala-Gly-Ser-NH2, were selectively discriminated by the restricted inner space of coordinati…
Abstract Several conjugated polymers containing phenothiazine moieties in the main chain were synthesized by Knovenagel or Wittig condensations. The polymers were identified and characterized by 1 H‐NMR, IR, gel permeation chromatography (GPC), thermogravimetric analysis (TGA), UV‐vis and fluorescent (FL) spectra. Res…
The low fluid throughput in electrospinning may limit the industrial use of single needle system. To meet high liquid throughput requirements and uniform fibers, a special aligned multiple jets setup has been designed in this paper. The needles have been disposed as a regular hexagon. A 7 cm diameter iron ring has bee…
The stress relaxation behavior of four kinds of knitted fabric under a constant strip biaxial strain applied instantly was estimated in the rectangular coordinate system rotated by arbitrary angle τ from the coordinate system along the structural principal axis direction. The stress relaxation curves for the four kind…