Materials Literature
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A new liquid crystal, cholesteryl (S)-4′-(2-methylbutyl)biphenyl-4-carboxylate (CB15-COOChol*), has been designed, synthesised and characterised. CB15-COOChol* exhibits multiple liquid crystalline phases: smectic A (SmA), nematic (N) and chiral nematic (N*). When CB15-COOChol* is heated, two N* phases exhibiting oppos…
In this study, we manufactured the HDPE/micro-calcium carbonate (CaCO 3 ) composites. A twin screw extruder was used to melt blend different loadings of CaCO 3 masterbatch, from 5% to 20%, with HDPE. Furthermore, injection-molded samples were manufactured using different molding conditions, namely pressure and cooling…
In some Ni-Mn-In- and Ni-Mn-Sn-based Heusler-type alloys, martensitic transformation from the ferromagnetic parent phase to the paramagnetic martensite phase appears and magnetic field-induced reverse transformation, namely, metamagnetic phase transition, is detected. In this paper, the metamagnetic shape memory effec…
Cyanobacteria (= blue-green algae) are prolific producers of structurally distinct and biologically active metabolites. In the continuation of our search for new sources of anti-infective natural products, we have assessed the in vitro antiprotozoal (Plasmodium falciparum, Trypanosoma brucei rhodesiense, T. cruzi, Lei…
Using the chemical bond theory of dielectric description, the chemical bond parameters of the M-, W-type hexagonal barium ferrites were calculated. The hardness of BaFe12O19 and BaFe18O27 were calculated. The calculated hardness of BaFe12O19 is 5.9 GPa, which is in agreement with the experimental values. The calculate…
Superhydrophobic coating is a very useful method to lower the moisture adsorption and improve the reliability of electronic devices. Here we report a facile fabrication of superhydrophobic surfaces by functionalization of graphene oxide (GO), an important precursor for preparing graphene. Several aliphatic amines mole…
A nanocomposite chrysotile-KDP (KH2PO4) was prepared. KDP was introduced into empty nanochannels of chrysotile asbestos with diameters of ∼5 nm. Thermal conductivity κ and heat capacity at a constant pressure C p of the samples of chrysotile asbestos and nanocomposite chrysotile asbestos-KDP were measured in a tempera…
The defect structure of multiwalled carbon nanotubes has been studied by transmission electron microscopy and Raman spectroscopy, with particular attention to the shape and intensity of the defect band D and its overtone D *. Electron-microscopic results demonstrate that multiwalled nanotubes typically have multiple b…
Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) granule formation in vivo in wild type Comamonas sp. EB172 grown in mixed organic acids under nitrogen limitation were visualized under transmission electron microscope (TEM). The early stages of PHBV production revealed dark-stained mediation elements near the center of th…
It is shown that upon cold rolling the deformation of an Fe-3% Si-0.5% Cu single crystal with a (110)[001] orientation occurs, along with slip, by twinning in the (112) $$[\bar 1\bar 11]$$ and (11 $$\bar 2$$ ) $$[\bar 1\bar 1\bar 1]$$ . systems. Upon a reorientation of the crystal lattice due to the operation of the s…
The corrosion resistance of aluminum and its alloys is the subject of tremendous technological importance due to their increased industrial applications. The corrosion protections and the mechanism of corrosion inhibitions of natural products for an Al-Mg-Si alloy in seawater were investigated at room temperature. The…
The effects of cryorolling (Rolling at liquid nitrogen temperature) and optimum heat treatment (short annealing + ageing) on fracture toughness of 7075 Al alloy are reported in the present work. The Al 7075 alloy was rolled for different thickness reductions (40% and 70%) at cryogenic temperature and its mechanical, f…
This review reports on the alkaline fading of crystal violet and other related carbocations in the presence of different microheterogeneous media (micelles, microemulsions and vesicles).
Porous silicon (PS) layers were formed on textured crystalline silicon by electrochemical etching in HF-based electrolyte. Optical and electrical properties of the TMAH textured surfaces with PS formation are studied. Moreover, the influences of the initial structures and the anodizing time on the optical and electric…
A pilot study was conducted to determine the prevalence and haematological characteristics of the interaction between thalassaemia or/and glucose-6-phosphate dehydrogenase (G6PD) deficiency in patients with sickle-cell disorder (SCD) in Taiz city, Yemen, where the prevalence of sickle-cell trait (HbAS) is 8.2%. Blood…
We performed systematic experiments to study the morphologies and microstructures of silver (Ag) films grown on different substrates and annealed at different conditions. It was found out that Ag microstructure varies widely versus the surface onto which Ag is plated and versus annealing conditions. The substrates use…
BACKGROUND: Wound infections caused by multidrug-resistant bacteria are a major issue in wound care. An occlusive dressing delivering an antimicrobial agent to the wound may be advantageous. The objective of this study was to evaluate an occlusive silk membrane loaded with colistin to establish an effective antimicrob…
Based upon the bionics principle, we present the design of a metal-dielectric-metal sandwiched leaf-shaped metamaterial, and the numerical simulation and experiment have confirmed an obvious left-handed transmission peak by this structure. The retrieved effective permittivity, permeability, and refractive index are al…
In the present paper X-ray microtomography technique has been applied to investigate internal, three dimensional structure of clay/polypropylene nanocomposite foams. Several sets of foam samples were prepared using the improved compression moulding technique that allows controlling independently the cells‘ size, cells…
Some applications of the commercial software v.4.12 in thermoluminescence (TL) studies have been reported. The PeakFit is a simple but convenient, powerful tool in extracting the two most important intrinsic trapping parameters namely, the activation energy (E) and frequency factor (s) of TL peaks of complex glow curv…