Materials Literature
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The morphology of the diatom genus Epithemia from ecosystems of Central Asia (Russia and Mongolia) is studied. It is shown that in the studied ecosystems there are species with local or endemic distribution, like in Lake Baikal, and taxa known from the Holarctic. Original morphological descriptions and pictures of 13…
Studies on the protein-metal binding sites have mainly focused on the residues immediately surrounding the reacting substrate, cofactors, and metal ions. The contribution of residues in remote layers to the highly optimized microenvironments of catalytic active sites is not well understood. To improve our understandin…
UV-curable polyurethane prepolymer and photoinitiator 1173 were facilely encapsulated in a poly(urea-formaldehyde) shell, which was in situ formed by the polymerization of formaldehyde and urea in an oil-in-water emulsion. The diameters of the microcapsules ranged from 118 µm to 663 µm depending on agitation speed, an…
This article reports a novel impedance-driven flow apparatus and its applicability for studying magnesium degradation under flow versus static conditions. Magnesium has potential to be an effective biomaterial for use inside the human body due to its biodegradability and biocompatibility. Magnesium undergoes degradati…
In this paper, an ultra-thin dual-band polarization-insensitive metamaterial absorber with wide-angle characteristics has been presented. The unit cell geometry comprises two circular rings with the inner one cross-connected. Simulated results show two discrete absorption peaks at 2.90 GHz (S-band) and 6.13 GHz (C-ban…
Flashover is a common reason of insulator failures especially in contaminated areas like industrial and coastal regions. In this paper, a nanosized carbon black is used to control the current-voltage (I-V) characteristics of a proposed coating material to improve proactive flashover performance which is presented by r…
This paper deals with the propagation of discharges over insulators of Bakelite and glass, in gases and their mixtures (namely N2, SF6, CO2, SF6 - N2 and SF6 - CO2) under DC voltage in a point - plane electrode arrangement. The shape and stopping length, Lf, of these discharges are investigated versus the type of insu…
Energy harvesting from wasting natural energy is a keen interested in research topic in order to find environmentally friendly energy source because of climate change. This paper was investigated energy harvesting issues using thermoelectric technology which used a temperature gradient to generated electricity. This p…
We have systematically mapped the phase behavior of a series of symmetric CE/C/E ternary copolymer/homopolymer mixtures, where C is poly(cyclohexylethylene) and E is poly(ethylene), identifying the location in composition of the technologically important bicontinuous microemulsion (BμE) channel as a function of dibloc…
Background and objectives: Cancer is a public health problem all over the world. Herbal medicines have a vital role in the prevention and treatment of cancer and large numbers of plants and their isolated constituents have shown potential anticancer activity. Methods: Twenty seven medicinal plants from southern Iran p…
This paper presents the experimental investigations on the low velocity impact response of woven kenaf fiber reinforced composites. Kenaf yarns are weaved with an orientation of 00 of warp and 900 of weft to form woven kenaf mat. Three woven kenaf mats are stacked together to achieve the specified sequences. The woven…
It is conjectured that vacuum dielectric surface flashover can be avoided by preventing its initiation. Assuming that the flashover process is initiated by the impact of charged particles on the insulator surface, by deflecting these away from the surface, the development of a flashover avalanche can be repressed. As…
The facile one-pot synthesis of CeO2-based catalysts has been developed to prepare a relatively large amount of nanopowders with relevant catalytic activity towards CO oxidation. The method consists of a two-steps process carried out in ethylene glycol: in the first step, 5 nm well-crystallized pure CeO2 is prepared.…
A new implementation of a cellular automaton for the simulation of primary recrystallization in 3D space is presented. In this new approach, a parallel computer architecture is utilized to partition the simulation domain into multiple computational subdomains that can be treated as coupled, gradually coupled or decoup…
Recently more and more researchers query the predictability of cytotoxicity results of biomedical Mg alloys obtained according to ISO 10993 due to significant difference between in vitro and in vivo corrosion. This study aimed to observe the influence of different extraction parameters (time, volume/surface ratio and…
We have studied downconversion luminescence behaviour of Y2O3 phosphor doped with Er 1 mol% and 1 mol% of Yb. The sample was prepared by modified solid state reaction method. Using inorganic material like (Y2O3), Flux Calcium Fluoride (CaF2) and Er2O3 as well as Yb2O3 with molar ratio 1 mol% of dopant. The prepared ph…
Optional viscosity average molecular weight of chitosan 3 × 105, the nanophase change microcapsules were mixed in the preparation chitosan spinning dope. Viscometer was used to measure the rheological properties of blend spinning fluid, using infrared spectroscopy,scanning electron microscope (SEM) and the interaction…
Due to the induced effect of plastic deformation and markedly influence of contact friction, the surface topography of galvanized steels has changed along with time and space during the sheet metal forming. WykoNT1100 non-contact optical profilometer was used to measure the surface topographies of different deformatio…
Skin Stapler is an alternative instrument, which makes surgy easily and quickly and owns fine-looking effect without scars after the wound healed, to traditional surgical suture for the wound skin sewing. Magnesium recently is considered to develop medical implants because of its beneficial biocompatibility and bioabs…
A novel hexaaluminate material Ca0.6La0.4FexMn1-xAl11O19 was prepared by a micro-emulsion method, and then washcoated on the cordierite substrates to produce monolithic catalysts. The obtained hexaaluminates were characterized by X-ray diffraction and scanning electron microscope. Results show that the particles of th…