Materials Literature
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The anodic corrosion of copper in presence of acetic acid derivatives were determined by measuring the limiting current. It is found that the rate of corrosion increased by decreasing H3PO4 concentration and electrode height. The experimental results showed that the inhibition efficiency increased with increasing conc…
The core-shell <TEX>$SnO_2$</TEX>@AO (A=Ni, Cu, Zn and Mg) films were prepared and the effects of coatings on photovoltaic properties were investigated. Studies on X-ray photoelectron spectroscopy, energy dispersive X-ray analysis and transmission electron microscopy showed the formation of divalent oxides on the surf…
This study deals with the experimentally investigated effect of zinc (Zn) particles on the thermal and mechanical properties of nylon 6/zinc composite materials. Nylon 6 and nylon 6 containing 6.0, 8.0, 12.0, 15.0, 20.0, and 25.0 wt.% of unmodified zinc particles, metal-polymer composite materials, were prepared by in…
Light element-based materials like spherical carbon nitride (C3N4) particles were melt-mixed at different concentrations with isotactic polypropylene to produce new nanocomposites. The iPP/C3N4 nanocomposites were characterized with differential scanning calorimetry (DSC), time-resolved synchrotron X-ray scattering ex…
The solid solutions of bismuth–vanadate were prepared by the conventional solid-state reaction. The sample characterization and the study of phase transition were done by using FT-IR, X-ray diffraction (XRD) and DSC measurements. AC impedance measurements proved that the oxide ion conductivity predominantly arises fro…
The catalytic oxidation of ethyl acetate in low concentration was investigated over mono-metallic Ag/ZSM5 and bimetallic (Ni, Mn)-Ag/ZSM-5 catalysts. Catalytic studies were carried out in a catalytic fixed bed reactor under atmospheric pressure. The sequence of catalytic activity was as follows: Ni-Ag-ZSM-5 > Mn-Ag-ZS…
Abstract Exchange couplings in [{Ln(hfac)3}2Cu(dpk)2] (Hdpk stands for di-2-pyridyl ketoxime) were evaluated by high-frequency electron paramagnetic resonance and magnetization studies, showing ferromagnetic Ln–Cu couplings with JLn–Cu/kB = +1.271(7), +0.405(3), and +0.196(13) K for Ln: Gd, Tb, and Ho, respectively.
Refractive index measurements have been done on a polar–polar binary system, 4-cyanophenyl [4′(4″-n-heptylphenyl)] benzoate (7CPB) + 4-cyanophenyl-4-nonylbenzoate (9.CN), exhibiting nematic–smectic Ad–re-entrant nematic phase sequence using thin prism technique. From refractive index as well as density data, the polar…
Figure 1. XRD patterns of the Ca8Mg(SiO4)4Cl2:Eu, Mn phosphors heat-treated at different temperatures ((a) 900 C, (b) 1000 C, (c) 1100 C, (d) 1200 C). Since visible LEDs were first reported in the 1960s, they have been widely studied as a backlight for liquid crystal displays (LCD) and solid-state lighting. In particu…
This paper presents the currently available experimental evidence for the occurrence of chiral resolution in bent-core nematic liquid crystals. The observation of chiral domains in these systems is discussed in context with other indications for the unique character of the nematic phase in bent-core materials, which c…
Emulsification of various common oils was investigated using natural β-cyclodextrin (β-CD) and its derivatives as emulsifiers. An oil/water (O/W) emulsion was formed using β-CD, whereas a water/oil (W/O) emulsion was formed using tripropanoyl-β-CD and tributanoyl-β-CD derivatives. Triacetyl-β-CD gave rise to both O/W…
Ultra-thin gold nanowires (GNWs), with uniform surface crystallinity, appear much more active than gold nanoclusters in benzylic compound oxidation. Ethylbenzene oxidation was used as a model reaction and a radical chain reaction mechanism was revealed by the DFT method.
A europium probe for the ratiometric detection of potassium in water is presented. This probe demonstrates high sensitivity, with an affinity for K(+) in the mM range, and high selectivity for K(+) over Na(+), Ca(2+), Mg(2+) and Li(+). The long luminescence lifetime of the probe and its large Stokes shift further enab…
The thermal conductivity of layered metal chalcogenides such as <TEX>$MT_2$</TEX> (M = Mo, W; T = S, Se) shows a marked decrease after exfoliation and subsequent restacking process. Random stacking of two-dimensional crystalline sheets circumvents thermal conduction pathways along a longitudinal direction, which resul…
The efficiency of three furan derivatives, namely 2-(p-toluidinylmethyl)-5-methyl furan (Inh. A), 2-(p-toluidinylmethyl)-5-nitro furan (Inh. B) and 2-(p-toluidinylmethyl)-5-bromo furan (Inh. C), as possible corrosion inhibitors for mild steel in 1.0 M HCl, has been determined by weight loss and electrochemical measure…
The graft copolymerization of cellulosic biofibers with methyl acrylate (MA) using potassium persulfate (KPS) as initiator has been reported. Various reaction parameters such as monomer, initiator concentration, reaction temperature, time, and amount of solvent were optimized to get the maximum grafting yield. The eff…
The present work aimed to achieve valorization of Albian sands for the preparation of sodium silicates that are commonly used as a precursor to prepare silica gel. A siliceous sand sample was mixed with sodium carbonate and heated at a high temperature (1060 °C) to prepare sodium silicates. The sodium silicates were d…
The sound velocity of some liquid elements of groups IV, V and VI, as reported in the literature, displays anomalous features that set them apart from other liquid metals. In an effort to determine a possible common origin of these anomalies, extensive neutron diffraction measurements of liquid Bi and Sb were carried…
We analyze the spontaneous magnetization reversal of supported monoatomic chains of finite length due to thermal fluctuations via atomistic spin-dynamics simulations. Our approach is based on the integration of the Landau-Lifshitz equation of motion of a classical spin Hamiltonian at the presence of stochastic forces.…
Relaxation rates in the $13mLiNO_3-6,5mCa(NO_3)_2-H_2O$ ternary system have been measured for nuclei of water ($^1H$ and $^{17}O$), anion ($^{14}N$), and both cations ($^7Li$, $^{43}Ca$). The data analysis reveals the system structure as consisting of two main charged units: [Li(H$_2$O)$_4$]$^+$ and [Ca(NO$_3$)$_4$]$^…