Materials Literature
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Compared with conventional turning, ultrasonic assisted turning demonstrates many advantages in turning of quenched steel. Surface micro-geometry is an important evaluation index of surface quality. In the paper, through the comparative experimental study of surface micro-geometrical characteristics in conventional an…
Magnesium diboride (MgB2) is known as a promising superconductor due to its high transmission temperature. Similarly to single-wall carbon nanotube, unique characteristics would be seen if a nanotube structure of MgB2 having a unit-wall of Mg and B atomic bilayer is prepared. However, such MgB2 nanotubes have not ever…
Abstract The semiconducting diamond structure of c‐Sn may be stabilized by embedding nanocrystals in a suitable host. Based on a very accurate tight binding parametrization we calculate electronic and optical properties of round, as well as faceted nanocrystals, under both no, tensile and compressive strain. Nanocryst…
The high-quality BaTiO 3 and Zn-doped BaTiO 3 thin films were prepared on Si substrates by choosing the suitable raw materials and optimizing the preparation of thin films and the post process of annealing. Through the characterization technique of x-ray diffraction (XRD) and atomic force microscope (AFM), the influen…
The identification of the magnetic material characteristics for the switched reluctance motor by solving an inverse problem is presented. The inverse problem aims at identifying the magnetic material parameter values of the magnetic circuit, starting from measured torque profiles. The computational time of the inverse…
Suitable architectures and paradigm shifts in assembly and usage models will make it possible to exploit the compactness and energy benefits of single-nanometer dimension devices and allow extending these structures into the third dimension without depending on top-down lithography to define the smallest feature sizes…
We describe the synthesis of an end-functionalized copolymer of N-(2-hydroxypropyl)methacrylamide (HPMA) and N-hydroxysuccinimide methacrylate (NMS) by reversible addition–fragmentation chain transfer (RAFT) polymerization. To control the polymer composition, the faster reacting monomer (NMS) was added slowly to the r…
Electroplated CoNiMnP-based permanent magnetic films with thickness of 4μm, 25μm and 43.5μm were fabricated and tested. Composed of 76.38 wt% Co, 16.66 wt% Ni, 3.64 wt% P and 2.32 wt% Mn, the films exhibited good surface morphology. In the case of 4μm thick film, we successfully achieved a high lateral coercivity of 7…
This study investigates the growth, morphology and cell viability of bone cells (osteoblasts) inside microcellular graphitic foam having an interconnected porosity. This type of substrate can be useful as a scaffolding material for tissue growth, but has not been adequately investigated. The influence of various surfa…
Due to the widespread production and use of carbon nanotubes in almost every area of science (i.e., drug delivery, biosensors, fuel cells and thermal management systems), they are receiving considerable attention for their novel mechanical, electrical and chemical properties. At this time of high exposure potential, i…
The relationship between properties of BF-WPC and the content of BF were studied, when wood-plastics composite (WPC) was reinforced by 12 mm and 3 mm short basalt fiber (SBF). The results showed that there may have some uneven distributions of SBF in WPC, when the content of 12 mm BF exceeded 30%. Restricted to the un…
Abstract Two new indolizidine alkaloids, (±)‐3‐oxoisoelaeocarpine (1) and (±)‐elaeocarpine N‐oxide (2), along with three known alkaloids, (±)‐isoelaeocarpine (3), (±)‐elaeocarpine (4), and (−)‐isoelaeocarpiline (5), were isolated from an EtOH extract of the branches and leaves of Elaeocarpus sphaericus. The structures…
A unique, original hybrid technological device, developed by the authors of the article, enabling the application of lots of different surface engineering methods in one technological process, including arc evaporation, ion nitriding, ion etching, ion implantation and electron beam evaporation is presented. The hybrid…
The glycoxide complexes Zn1–x Co x (HCOO)(HOCH2CH2O)1/2 and Zn1−x Co x (OCH2CH2O) (0 ≤ x ≤ 0.3) have been synthesized by heating ethylene glycol solutions of zinc formate Zn(HCOO)2 · 2H2O or its mixtures with cobalt formate Co(HCOO)2 · 2H2O. The crystals of these complexes have the shape of filaments (needles, bars) a…
The compound (H3O)2{(Na2(OH)CB[5])2[HV4O12]}Cl · 14H2O is synthesized by heating (120°C) of a mixture of sodium vanadate, cucurbit[5]uril (CB[5]), rubidium chloride, and water in a sealed ampule. According to the X-ray diffraction data, the binding of the [Na2(OH)]+ binuclear cation with CB[5] occurs due to the bident…
Molecular-dynamics simulations are used to study the phase behavior of a single linear multiblock copolymer with blocks of A - and B -type monomers under poor solvent conditions, varying the block length N , number of blocks n , and the solvent quality (by variation of the temperature T ). The fraction f of A -type mo…
The first methods are developed for introducing niobium(V) into Mg-Al hydrotalcites used as precursors of oxide catalysts for oxydehydrogenation (OD) of alkanes and alcohols. Samples of niobium(V)-containing oxide catalysts are synthesized. Their catalytic properties are studied in oxydehydrogenation of ethane and eth…
BACKGROUND: Identification of specific mutation targets in cancer may lead to discovery of the genes modulating cancer susceptibility and/or prognosis. The RGSL1, RGS16, and RGS8 genes within the 1q25.3 region belong to the novel family of regulators of G protein signaling (RGS) genes, which increase the GTPase activi…
Due to the presence of the blood brain barrier (BBB) and the intrinsic complex structure of brain, there are several challenges to overcome in the treatment of brain diseases, for both diagnosis and targeting. The advancement of fast-growing nanotechnology provides many novel tools and creative ideas that can be used…
Using special tools at the end-effectors of Minimally Invasive Surgery (MIS) robots has an important role in building a simple and well controlled system that increases dexterity of surgeons. Having local, lightweight and powerful actuators at end-effectors could help to simplified wrist design and saving the number o…