Materials Literature
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Chitosan is a natural polymer derived from the chitin of crustacean or mushroom shells, that intrinsically presents haemostatic, mucoadhesive, antimicrobial and immunostimulant properties.This polysaccharide has shown a great potential for biomedical and pharmaceutical applications, on account of its remarkable compat…
The europium(III)-benzoic acid(HL)-1,10-phenanthroline(phen) complex was synthesized in the ethanol-H2O system by a precipitation method. The morphology of the minicrystal complex with diameters of ca. 1.0 µm is characterized by scanning electron microscopy (SEM). Elemental analysis and inductively coupled plasma-atom…
WO3-based capacitor-varistor ceramics doped with Er2O3 were prepared and the microstructures and nonlinear electrical properties were investigated. The results show that there exist second phase Er10W2O21 on the surface of WO3 grains. Doping Er2O3 in WO3 ceramic can inhibit the grain growth. A small quantity of Er2O3…
Substance property modifications in materials can lead to failure by growing to a critical and self-propagating size. By knowing the dimensions of defects present in a component, it is possible to estimate both extent of degradation and remaining life of the component and defects' growth characteristics under operatin…
Homo- und Heteroleptische Derivate von dreifach gebundenen Dimolybdänalkoxiden wurden synthetisiert und in der Synthese neuartiger, zweikerniger Molybdänkomplexe in verschiedenen Oxidationsstufen, sowie für die Darstellung von heterometallischen Clustern verwendet. Ausgehend von den erhaltenen, dreifachgebundenen Vors…
A novel polysiloxane bearing (N,N)-dimethyl-γ-aminopropyl-γ-aminopropyl side groups(ASO-2) was synthesized by copolymerization of octamethylcyclotetrasiloxane with (N,N)-dimethyl-γ-aminopropyl-γ-aminopropyl methyl dimethoxysilane and hexamethyldisiloxane. Chemical structure, film morphology and the softening fabric pr…
Surfactant hydrogels were prepared composed of sodium dodecyl sulphate(SDS) /Al(NO3)3 /H2O systmes. Steady and oscillatory shear experiments were carried out to evaluate the inner structure of the gel with variable Al(NO3)3 concentration at a fixed SDS 20wt% composition in gel region. The results indicated that hydrog…
In this article, the polyaniline(PANI) spherical nanoparticles were synthesized by the way of emulsion polymerization. The effects of emulsifier concentration on the morphology and electrical properties were systematic studied. The structure of PANI prepared by this method was characterized by Fourier transform infrar…
Abstract isolation of the novel sesquiterpenoid, hedyosmum F (I) along with three known sesquiterpenoids
Two functional citral-based azobenzene derivatives with different substituted groups have been synthesized and their photoisomerization have also been investigated. It has been found that depending on different substituted groups, the formed azobenzene derivatives showed different properties, indicating distinct regul…
Catalytic combustion of volatile organic compounds (VOCs) is a high efficient and low-polluted technique. In this paper, the palladium-based combustion catalysts on cordierite honeycomb ceramics (CHC) substrate without interlayer film — Pd/CHC, were prepared by electroless plating method, and the effect of preparing c…
Abstract Review: 133 refs.
The attractive properties of Yttria doped ceria, particularly the structural and material properties, have led to vast research efforts to investigate and develop such materials. One of the main applications of this ceramic is in the solid oxides fuel cells for intermediate temperatures IT-SOFC. The aim of this paper…
This paper describes the characteristics of different metallic protections of high voltage cables. This protection has three tasks during the cable life and installation; water protection, mechanical protection during laying and operation, draining of short circuit current. The influence of water on the deterioration…
A series of 4-dihydroquinolinone derivatives were fully optimized by density functional theory (DFT), Hartree-Fock (HF) and Configuration Interaction Singlet (CIS) approaches. Absorption spectra, emission spectra and two-photon absorption cross sections were calculated by using time-dependent density functional theory…
A kind of compound catalyst containing the main activate component CuO, the second activate component ZrO2 and electronic promoter La2O3 was prepared. It was applicable to treat with high-concentration dimethyl acetylsuccinate (DMAS) production wastewater with catalytic wet air oxidation technology which was used in c…
The demand for XLPE energy and power cables is steadily growing related to the need to build and modernise the electrical distribution and transmission systems. Following increased urbanisation the available space for overhead lines becomes more restricted. In addition the concern of electromagnetic radiation from ove…
Carbon dioxide corrosion is a very complex electrochemical process. Compositions of formation water in different gas and oil wells are various, which effects on the carbon dioxide corrosion of tubular steel. HCO3- and SO42- were studied in order to further understand their role on the corrosion process. The results sh…
Knowing the state of degradation of electrical insulation materials is important for any type of equipment, but it is imperative in the case of equipment for nuclear plants. A study was conducted to evaluate the use of oxygen under pressure to accelerate thermo-oxidative degradation rate in EVA compound used as cable…
Abstract Review: 39 refs.