Materials Literature
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We investigated the sol-gel synthesis process of barium titanate ultrafine particles with using barium hydroxide aqueous solution and titanium alkoxide solution. Emphasis was placed on the relationship between the mixing condition of both solutions and the properties of the particles. A static mixer was used as reacto…
The polyaniline(PAni)coating was electrochemically deposited on nickel skeleton electrode and nickel foil by potential sweep between − 0.2 V and 1.2 V/SCE, with a scan rate of 20 mV s−1; acid aqueous solutions containing 0.027 mol L−1aniline in 1 mol L−1sulphuric acid were used. The PAni film was studied by IR Spectro…
Thermal conductivity modeling using the Debye approximation can significantly reduce the complexity involved in the evaluation of thermal conductivity integral. Nevertheless, there are several compelling reasons (e.g., inconsistency between the estimations of the density of states used for heat capacity and thermal co…
The aim of this paper is to present a new control mode of AC switch (thyristors, triacs ...). The applied signal on the device gate is a "high frequency" alternating sine, instead of a pulse-shaped signal. This solution has been retained in order to integrate galvanic isolation with power-controlled switches. Control…
Exotic leather is an important part of the leather industry, which is worth approximately three billion dollars (Sterlacci, 1997). Due to an increased fashion emphasis on exotic leather apparel, it is now considered a fashion staple rather than a trend. This study was part of a larger project, conducted by a multi-fac…
Results of ferroelastic domain structure evolution and XRD studies near the superprotonic phase transition in mixed [(NH4)1−xRbx]3H(SO4)2 are reported. A theoretical description of the high temperature phase transition on the basis of phenomenological theory is proposed.
Carbon nanotubes can encapsulate several molecular species forming one‐dimensional crystals. Using previously reported methods we produced directly‐bonded, asymmetric C60‐C70 dimers and oxygen‐bridged dimers of the type C60‐O‐C60. We present here microscopic evidence of filling single‐walled carbon nanotubes (SWNTs) w…
A new dihydrochalcone glucoside, vacciniifolin, along with confusoside, trilobatin and sieboldin were isolated from the leaves of Symplocos vacciniifolia. By the method of spectral analysis, this new compound was elucidated as 2',3,4,4'-tetrahydroxydihydrochalcone 4'-O-β-D-glu-copyranoside.
A new concept of pseudo-continuum model is proposed to analyze the complicated nonlinear behavior of plain-weave fabrics in in-plane problem. The deformation of plain-weave fabric is categorized into three types in view of thread deformations, that is, skewing, straightening and extension. In this categorization, it i…
The novel styrene-N-phenylmaleimide copolymer-montmorillonite nanocomposites were prepared by emulsion intercalation copolymerization from Na~+-montmorillonite and montmorillonite modified by cetyltrimethylammonium brumide respectively. For comparative purposes, the copolymerization conditions(such as comonomer feed r…
The layered cobalt oxides show large thermopower, low resistivity, and low thermal conductivity, and are a promising material for thermoelectric power generation. They share the CdI2-type hexagonal CoO2 layer as a common unit, where large entropy of kBlog6 is stored on Co4+ ion. They show large anisotropy between the…
Nonlocal approaches are discussed with regard to the differential and discrete formulations. Nonlocality was found to be a concept non attaining to the description of the material, but of the physical phenomenon. When using the differential formulation for modeling heterogeneous materials, a length scale must be intro…
Traditional chemotherapy treats tumors by systemic treatment via parenteral or oral application, by intratumoral injection, or by interstitial placement of drugs. New drug delivery systems can be used for local delivery to reduce side effects, to improve the bioavailability, or to target specific sites. Most of these…
A three-dimensional kinetic Monte-Carlo technique has been developed for simulating the growth of thin Cu films. The model involves incident atom attachments, diffusion of the atoms on the growing surface, and the detachment of the atoms from the growing surface. Related effects due to surface atom diffusion was taken…
Polypropylene (PP) is a versatile material whose use has significantly penetrated numerous sectors of the manufacturing, medical, and packaging industries. Polymer clay nanocomposites are multiphase organic/inorganic hybrid materials pioneered by researchers at Toyota, which may exhibit significantly improved mechanic…
Poly(vinylbenzyltrimethylammonium chloride) (PVBT) has been synthesized by radiation-induced polymerization of Vinylbenzyltrimethylammonium chloride (VBT). The viscosity average molecular weight of synthesized polymer was estimated to be approximately 10(5) by viscosity measurements. The radiation-induced affects on P…
The photoluminescence spectra and kinetics of both erbium-doped and undoped multilayer structures of quasi-ordered silicon nanocrystals in a silicon dioxide matrix were studied. It was shown that the optical excitation energy of silicon nanocrystals 2–3 nm in size can be practically completely transferred to Er 3+ ion…
Epoxy nano-hybrids reinforced with cellulose fibre (CF), nano-kaolinite (K), and micro-ZrO2 (Z) have been synthesized. The influence of CF/K/Z dispersions on the mechanical properties of these hybrids have been characterized in terms of elastic modulus, hardness, flexural strength, fracture toughness and indentation r…
The antileukemic activity of the original conjugate of anthracycline antitumor antibiotic epirubicin, covalently bound to the biopolymer dextran was studied. The ascitic lymphoid leukemia L 1210 (transplantation dose 1x105 tumor cells/mouse, i. p.), in hybrid mice BDF1, was used as tumor model. An antileukemic activit…
TbFe2 films prepared by a flash evaporation system onto Si(100) or polyimide substrate have been irradiated with different Ar ion doses at zero, 1.3 × 1017 and 2.7 × 1017 cm−2 and at 10 kV. Magnetostrictive properties, i.e., saturated magnetostriction and magnetostrictive susceptibility, of TbFe2 film with disordered…