Materials Literature
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The effects of brominated flame retardant which composed of decabromodiphenyl ethane (DBDPE) and antimonous oxide (AO) on long glass fiber reinforced polypropylene (LGFPP) were investigated by means of limiting oxygen index (LOI), vertical burning (UL-94), thermogravimetry analysis (TGA), and mechanical properties. Wi…
The dynamics of the reduction reaction of Ni x Mg 1− x Al 2 O 4 to form nickel metal and a remnant oxide was quantified to understand spinel behavior in catalysis applications. X‐ray diffraction, thermogravimetry, and pycnometry were employed to track the evolution of high‐ Ni spinels to metastable nonstiochiometric s…
Polyvinyl alcohol (PVA) water solution was electrospun by both needle electrospinning and needleless electrospinning. The electrodes for needless electrospinning were rotary spiral disk and spiral coil made from stainless steel. We found that needleless electrospinning can obtain nanofibers in large-scale, while fiber…
We report the magnetic transition and large magnetic entropy change in Sr doped lanthanum manganites. Polycrystalline La1-xSrxMnO3 (0.20 x 0.35) samples were prepared using the conventional solid-state reaction method. The results of X-ray diffraction indicates perovskite phase without any impurity. The magnetic study…
In this study, we investigated the physical properties of powders made from agricultural byproducts, including rice straw, peanut husks, and garlic stems, to manufacture a new organic filler used for making paperboard. These materials were collected individually, and then we measured their chemical compositions. The b…
Au–Cu alloy nanoparticles (NPs) were grown in three different dielectric film matrices by the sol–gel method in order to see the influence of the embedding matrices on the crystal structure of the alloy NPs. The chosen film matrices were TiO2 (anatase; tetragonal), ZrO2 (cubic) and SiO2 (amorphous). Au and Cu salts (1…
The main fire retardancy mechanism of polymer–clay nanocomposites involves the progressive build-up of an inorganic-rich layer at the sample surface during combustion, by a combination of ablative reassembling and migration of the nanoparticles, reducing heat and mass transfer between gas and condensed phases. In this…
Abstract By directly introducing Ni–B into NaAlH 4 system using a facile two‐step synthesis method, the effects of Ni–B on NaAlH 4 were systematically investigated. NaAlH 4 can be completely formed after 30 h milling under 1 MPa hydrogen pressure. In addition, the dehydrogenation kinetics of as‐prepared NaAlH 4 after…
Abstract The Bi 0.5 Na 0.02 Sb 1.48− x In x Te 3 alloys ( x = 0.02–0.20) were synthesized by vacuum melting and hot pressing methods at 753 K, 60 MPa for 30 min. Effects of Na and In dual partial substitutions for Sb on the thermoelectric properties were investigated from 300 to 500 K. Substituting Sb with Na and In c…
We study the electronic transport properties of graphene with covalently bonded hydrogen impurities. Our measurements reveal low-energy resonant scattering processes within the transport for each charge carrier type. The observed resonances exhibit a strong energy dependence and are accompanied by a sharp increase in…
This study aims to evaluate the influence of solvent acids and glycerol as plasticizer on the antimicrobial and physical properties of chitosan films. Three types of acids were used in the same concentration, e.g. 1% acetic acid, 1% citric acid and 1% lactic acid whereas glycerol was fixed on 10% (w/w). In terms of ba…
Abstract The effect of substitution (F, Cl, SH, NO2, CH2F, CH2Cl, CH2COOH, CH2OCH3, and SCOCH3) on the hydrogen-bond strengths, vibrational frequencies, and physical properties such as dipole moment, chemical potential, and chemical hardness of substituted (Z)-N-(thionitrosomethylene)thiohydroxylamine compound has bee…
CELLULOSE nanowhiskers (CNW) were synthesized from native cotton cellulose as per the acid hydrolysis methods. Thus Egyptian cotton slivers, after being purified, were subjected to three sulfuric acid concentrations, viz. 55%, 60% and 65% (w/w) at 60 0C for 60 min. The yield of CNW attains values of 65%, 57% and 50%,…
SMART project (Sustainable Moulding of Articles from Recycled Tyres) is a research project financed by the European Commission with the aim of developing a new moulding process of granules and powders from tyre recycling without any addition of virgin rubber or linking agent. The so called “direct moulding” is a compr…
Interest in MRI contrast agents for molecular imaging of biological function experienced a surge of excitement approximately 20 years ago with the development of the first activatable contrast agents that could act as biosensors and turn "on" in response to a specific biological activity. This brief tutorial, based on…
Zn1-XNiXO (x = 0.00, 0.02, 0.04 & 0.06 mol %) nanoparticles were prepared by simple co-precipitation method. The influences of Ni doping on structure, morphology, optical and photocatalytic properties were investigated by means of Xray diffraction, scanning electron microscopy, UV–Vis spectrophotometer and photochemic…
The calculation of the fundamental limits of nonlinear susceptibilities posits that when a quantum system has a nonlinear response at the fundamental limit, only three energy eigenstates contribute to the first and second hyperpolarizability. This is called the three-level ansatz and is the only unproven assumption in…
The miscibility of chitosan / methylcellulose (CH/MC) blends was studied by FT IR, wide-angle X-ray diffraction (WAXD), thermogravimetric analysis (TGA), and scanning electronic microscopy (SEM). The regular changes of FT IR and WAXD spectra of CH/MC blend powder indicated the miscibility of the blends. TGA curves and…
The purpose of this review article is to potentiate the use of nanogel based artificial chaperones as therapeutic approach in delivery of various molecules. Nanogel is a nanoscale drug delivery systems with enhanced surface area not only are capable of transmitting hydrophobic drugs in vitro and in vivo with improved…
Attempts have been made to evaluate four methods of quantitative determination of soil carbonates. Calcium carbonates equivalent were determined by the acid neutralization, calcimeter and acetic acid methods. Also, it obtains by the fourth methods when the acid neutralization method is corrected against proton adsorpt…