Materials Literature
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Hard-anodized alumina coatings were formed in sulfuric acid at low temperature and high current density in the presence of carboxylic acid additives. Citric acid, trimesic acid, mellitic acid and ethylenediaminetetraacetic acid (EDTA) were utilized in varying concentrations. The additives were chosen for their capacit…
In this article it is considered the electromagnetic torque calculation of low power induction motor with ring windings (IMRW), designed for using in radioactive waste recycling equipment, in environments with high levels of radiation and temperatures over 200 degrees by dint of “ANSYS Maxwell”. The design of the magn…
Nitrogen-doped graphene (N-graphene) was prepared via molecular doping from symTriazine molecules at low temperature. The phase structure, morphology and electrical property were characterized by Raman spectroscopy (Raman), X-ray photoelectron spectrospve(XPS), atomic force microscope (AFM), ultraviolet spectrophotome…
Significant research has been focused on optimizing efficiency of crystalline silicon solar cells with nanostructured surfaces. Light absorption is greatly enhanced by light trapping in nanostructures. The main focus of research work presented here is to enhance the broadband light absorption in randomly etched nano-p…
In this present study, 0.66 volume percentage of biocompatible nano-sized titanium dioxide particles were incorporated into commercially pure biodegradable magnesium matrix using blend-press-sinter-extrusion powder metallurgy technique avoiding ball milling. The incorporated titanium dioxide particles dispersed reason…
The electrical conductivity of polymeric materials containing conductive particles shows a typical percolation behavior. Besides this effect adding the particles to a polymer matrix affects the rheological properties considerably. In the literature one can find some studies relating the electrical percolation to a com…
In this work we perform the results of study of thin amorphous carbon films (a-C) synthesized by magnetron sputtering of graphite target at direct current in argon atmosphere. Analyzing experimental data, we revealed the dependence between a-C films structure and substrate temperature. Local structure was studied by R…
Abstract In this study, surface modifications for the biodegradable polymers poly(ε-caprolactone) (PCL) and poly(3-hydroxybutyrate) [P(3HB)] were developed in order to improve their suitability as scaffold material for bioartificial vessel prostheses. The challenge of wet-chemical surface modifications is to avoid bul…
Structure and binding properties of two synthetic receptors, simultaneously integrating Ca 2+ and Mg 2+ binding sites, are described.
Matrix absorption effects have been examined with scattered X-rays by using WDXRF system for Fe-Ca and Fe-Ti binary compounds. Fe as analyte and elements which some of them the K absorption edge just below the characteristic K X-ray energies of the analyte (Fe) as matrix have been chosen. Pure and binary with Fe ratio…
In recent decades the theoretical and experimental study of transient phenomena regarding power transformers has experienced a great development. Results of these studies allowed the elucidation of the main theoretical and practical aspects of the transient phenomena due to propagation of impulse voltages inside the t…
L10-type alloys and L21-type Heusler alloys are key materials for future spintronic and magnetic storage devices. L10-FePt with high uniaxial magnetic anisotropy is a promising material for ultrahigh density recording because of its high thermal stability of magnetization at a nanometer scale. Co-based Heusler alloys…
扎龙湿地位于黑龙江省西部、松嫩平原乌裕尔河下游，是我国北方同纬度地区最完整的湿地。于2012年春、夏、秋3季，对扎龙湿地6个代表性区域进行硅藻标本采集，经观察鉴定，发现硅藻植物140个分类单位，包括121种19变种，隶属于2纲6目9科30属。羽纹纲物种较丰富，占总种类数的95%。硅藻植物群落呈现明显的季节演替，秋季硅藻种类丰富度及相对丰度明显高于春、夏两季，优势种多以淡水、半咸水、喜弱碱的种类为主，优势种与水体的盐度和酸碱度存在一定的响应关系。应用典范对应分析（Canonical Correspondence Analysis，CCA）探讨硅藻植物群落变化与环境因子之间的关系。CCA结果显示在扎龙湿地中，水温、电导率、pH、溶解氧…
Carboxymethyl cellulose/halloysite nanotube (CMC/HNT) bio-nanocomposite films were prepared by solution casting method. The effect of HNT content on tensile properties and morphology were studied. The results showed that the tensile strength of the CMC/HNT bio-nanocomposite films achieved optimum at 10 wt% of HNT cont…
Due to a lack of technology, smaller breweries simply dump excess CO2 into the atmosphere, fueling the greenhouse effect and global warming. State-of-the-art CO2 capture technologies using nanofibrillated cellulose are expensive and require laborious freeze-drying. Consequently, there is a high demand for affordable a…
Short-circuit impedance is an important technical parameters of power transformers, which will affect the efficiency, cost, mechanical strength of transformer. In this paper, the conventional winding arrangement of the high-impedance autotransformer is improved, and the short-circuit impedance of the new-type autotran…
Density (ρ), ultrasonic velocities (u) and dynamic viscosity (η) for three binary mixtures of Trichloroethylene with 1-pentanol, 1-hexanol and 1-heptanol are presented at ambient temperature 303.15 K at atmospheric pressure over the entire composition range. The density and viscosity are measured using Specific gravit…
Transformers are the heart of electrical transmission and distribution systems. Global transformer design optimization (GTDO) is a complex multi-objective optimization problem. Aim of transformer design is to obtain the dimensions of all parts of the transformer in order to supply these data to the manufacturer. The t…
In this Letter, a refractive index measurement of a dielectric sample using highly focused radially polarized light is reported. Through imaging analysis of the optical field at the pupil plane of a high numerical aperture (NA) objective lens reflected by the sample under study, the Brewster angle is found. Employing…
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