Materials Literature
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This study describes a novel precision synthesis strategy for graft copolymers using Friedel–Crafts-type termination reaction between a cationically prepared poly(styrene derivative) and the naphthyl side groups from a poly(vinyl ether) main chain. The pendant alkoxynaphthyl groups on the poly(vinyl ether) efficiently…
It was demonstrated that gold nanoparticles can be obtained by using cellulose ethers, methyl hydroxyethyl cellulose and carboxymethylcellulose as reducing agents and also as nanoparticle stabilizers. IR spectral studies revealed a difference between the mechanisms of reduction and nanoparticle stabilization by these…
Skeletal myoblasts (SMs) transplantations are the focus of intense investigation due to their therapeutic potential for cardiac repair. Heart diseases are the main problem in humans worldwide, resulting very often in death of patients. Consequently, investigators sought methods which could improve myocardial function…
This study analyzes experimentally the influence of the friction between the sheet metal and the die surfaces on the results of the Erichsen test in terms of load-displacement curve of the punch, the normalized thickness measured at the specimen apex and the distance measured between the thinnest area of the specimen…
Alkali metal nanoclusters can be stabilized in the regular cages of zeolite crystals by the loading of guest alkali metals. Cages are connected by the sharing of windows of the framework, and arrayed in simple cubic, diamond and body centered cubic structures in zeolites A, X and sodalite, respectively. The s -electro…
Polymer based composites are widely used in the automobile body panels instead of the steel sheet, due to the requirement of reducing automobile weight. Natural fiber composites were proposed to be used for the car bumper beam. In this paper, the mold filling process of the car bumper beam model for VARTM process was…
Local electron states in indium-doped lead telluride-based solid solutions exhibit a number of features which separate them from the diversity of impurity states in semiconductors. These features are most pronounced in terahertz photoconductivity. The results of the corresponding experiments performed during the last…
Photosensitive In-n +-CdS-n-CdS x Te1 − x -p-Zn x Cd1 − x Te-Mo film structures based on II–VI semiconductors and operating in the wavelength range λ = 0.490–0.855 μm have been fabricated. These structures in the forward current direction at high bias voltages operate as injection photodiodes and exhibit a high integr…
Abstract Ternary nitrides such as (Cr1‐xAlx)N deposited via PVD find widespread application as hard protective coatings on cutting tools and as corrosion and wear resistant coatings on mechanical components due to their good tribological, mechanical and chemical properties. The combination of these properties makes (C…
We report the direct visualization of point defect clustering in {113} planes of silicon crystal using a transmission electron microscope, which was supported by structural modeling and high-resolution electron microscope image simulations. In the initial stage an accumulation of nonbonded interstitial-vacancy (I-V) p…
In this paper, a Frequency Selective Surface (FSS) radome with a horn system was analyzed. A new coupled resonator spatial filter (CRSF) consisting of hexagon patch and circular aperture was firstly used in W-band. The FSS element shows stable performance with the polarization state and angle of incident wave. The hor…
The submitted paper deals with analyses of impact of water jet technology head vibrations due to variations of kinds and granularity of abrasive during steel cutting manufacturing process using AWJ technology. The paper points at necessity to diagnose and subsequently eliminate possible sources of adversed vibrations.…
The formation of pirssonite is commonly believed to be the cause of hard-scale buildup in green liquor handling systems in kraft pulp mills. The precipitation occurs when the concentration of sodium carbonate in the liquor exceeds the solubility of pirssonite. A laboratory study was conducted to systematically determi…
A rare Bi-Pb tellurosulfide (the unnamed Pb3Bi4Te4S5) has been found in samples from the Au-bearing quartz-arsenopyrite veins of the Limarinho deposit (northern Portugal), along with other Pb-Bi sulfotellurides, such as aleksite and plumboan ingodite [(Bi0.93Pb0.11)S0.52Te0.42]. This is the first occurrence of these m…
The chemical composition and the crystal structure of a gem-quality brazilianite from the Telírio pegmatite, near Linópolis, Minas Gerais, Brazil, [NaAl 3 (PO 4 ) 2 (OH) 4 , a = 11.2448(5) Å, b = 10.1539(6) Å, c = 7.1031(3) Å, b = 97.351(4)°, V = 804.36(7) Å 3 , space group P2 1 /n, Z = 4], have been reinvestigated by…
The structural, elastic, and thermodynamic properties of cubic -Fe 2 TiAl under high temperatures and pressures are investigated by performing ab initio calculation and using the quasi-harmonic Debye model. Some ground state properties such as lattice constant, bulk modulus, pressure derivative of the bulk modulus, an…
In this paper we discuss spent fuel management options in the Republic of Korea (ROK) from two interrelated perspectives: Centralized dry cask storage and spent fuel pyroprocessing and burning in sodium fast reactors (SFRs). We argue that the ROK will run out of space for at-reactors spent fuel storage by about the ye…
Abstract Der vorliegende Beitrag beschäftigt sich mit hochdynamischen Einwirkungen auf das Material Beton und auf Stahlbetonkonstruktionen. Zunächst werden die Grundlagen zu den hochdynamischen Einwirkungen Explosion und Impakt kurz beschrieben. Materialien verhalten sich unter diesen Einwirkungen anders als unter sta…
Efficient hybrid photodetector consisting of silicon nanowires (SiNWs) (∼40 μm) capped with Polyacrylic Acid (PAA) is demonstrated. Highly diluted PAA with deionized (DI) water was spun directly on vertical SiNW arrays prepared by metal assisted electroless chemical etching (MACE) technique. We have observed ∼9, 4 and…
A single-crystal study on the low-temperature magnetism of a pyrochlore magnet Pr2Zr2O7 has been carried out. The temperature dependence of the magnetic susceptibility shows no magnetic ordering at temperatures down to 1.9 K. The Curie-Weiss behavior was observed at temperatures below 10 K, yielding an effective momen…