Materials Literature
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Dissolution (or in vitro release) studies constitute an important aspect of pharmaceutical drug development. One important use of such studies is for justifying a biowaiver for post-approval changes which requires establishing equivalence between the new and old product. We propose a statistically rigorous modeling ap…
The first boroselenates were obtained as single crystals by the reaction of selenic acid with boron acid and the corresponding alkali carbonates. The structure determinations showed a far-reaching analogy to very recently described borosulfates and the borophosphates, that is, tetrahedral BO4 and SeO4 units linked by…
Shield tunnels have been widely used in city metros all over the world. During the long-term period of the metro operation, the joints of shield tunnel's neighboring segments may degrade due to some environmental factors, leading to the increasing of the joint opening and some resulting adverse consequences. In this p…
I measure the Leslie thermomechnical coefficient ? in diluted cholesteric liquid crystals. The chiral molecules are R811 and cholesteryl chloride (CC) and the host nematic liquid crystals are 7CB and MBBA. I show that ? is proportional to the concentration of chiral molecules C when . This allows me to define the Lesl…
ZnO nanotubes were prepared by selective dissolution of electrodeposited nanorods. The effect of solution pH, rod morphology, and chloride ion concentration on the dissolution mechanism was studied. The selective etching was rationalized in terms of the surface energy of the different ZnO crystal faces and reactant di…
Eu 3+ / TiO 2 xerogels have been obtained from colloidal sols by drying at room conditions. Anatase with traces of brookite phases are obtained from the synthesis and the stability of both with temperature is higher (from 400°C up to 800°C) when Eu 3+ is present. Raman phonons have been used to detect the different ph…
Recently, Raj et.al. have developed a very unique sintering technique, called flash-sintering [1]. According to their report, fully densified ZrO2-3mol%Y2O3 ceramic bulks were successfully obtained only at 800°C for 5sec. Considering the conventional sintering condition around 1500°C for a few hours necessary to obtai…
Spinal cord injury (SCI) is a common neurologic disorder that results in loss of sensory function and mobility. It is well documented that tissue engineering is a potential therapeutic strategy for treatment of SCI. In this connection, various biomaterials have been explored to meet the needs of SCI tissue engineering…
Abstract The shape of Ag2O crystals that evolve from edge and corner‐truncated cubes into rhombicuboctahedrons, then to hexapods can be conducted precisely by simply controlling the amount of AgNO3, NH4NO3 and NaOH precursors. The edge and corner‐truncated cube crystals possess the highest photocatalytic activity, fol…
Reduced graphene oxide nano-sheets encapsulated copper spherical particles (Cu@rGO) were obtained through a simple electrostatic self-assembly process followed by chemical reduction. The oxidation resistance of Cu spherical particles was considerably enhanced by the coating of rGO nano-sheets. XRD results show that th…
Modification of the Egyptian Bentonite (EB) was carried out using organo-modifier namely; octadecylamine ODA. Before the modification, the cation exchange capacity (CEC) of the EB was measured, also it was purified from different impurities using HCl and distilled water. The Organo-bentonite OB was characterized using…
The pure tetragonal crystal phase LaOF:Eu3+ (2 mol%) nanocrystals (NCs) are obtained by annealing ultrasmall-sized LaF3:Eu3+ (2 mol%) NCs assisted with the surfactant oleic acid. Spectroscopic characterization of Eu3+ in various host materials, including hexagonal-phase LaF3, NaYF4 and NaLaF4, cube-phase NaYF4, tetrag…
Abstract Atmospheric pressure chemical ionization (negative ion) and electrospray ionization (positive and negative ion) mass spectrometry and nuclear magnetic resonance (1H NMR and 13C NMR) were used to characterize the prepolymer (i.e. uncrosslinked) poly(xylitol sebacate) (PXS), prepared by condensation of xylitol…
ABSTRACT Epoxidized soybean oil‐based paper composites (ESOPCs) were prepared by fabricating poly epoxidized soybean oil (PESO) with paper. With boron trifluride diethyl etherate as catalyst, epoxidized soybean oil was in situ polymerized on the surface of the paper and within the interspaces of the paper cellulose fi…
We studied the solution processed vanadium pentoxide (V2O5) doping effect in PEDOT:PSS for use in hole injection layer (HIL), and as a result, V2O5 doped PEDOT:PSS improved the performance of polymer light-emitting diode (PLED) significantly. The improvement is related to the increased conductivity of PEDOT:PSS by V2O…
DFT calculations predict that plasmon-like excitations in small metal clusters are able to selectively modify the relative intensities of specific SERS bands of adsorbed molecules. These electronic resonances provide new kinds of SERS selection rules which can explain the huge enhancement of mode 9a of pyridine in the…
Although significantly reducing the thermal conductivity of silicon nanowires has been reported, it remains a challenge to integrate silicon nanowires with structure materials and electrodes in the complementary metal-oxide-semiconductor (CMOS) process. In this paper, we investigated the thermal conductivity of nanome…
The objective of this study was to investigate contribution of nanoclays to the flame retardancy of polyamide-6 and its 15 wt% short glass fiber–reinforced composite with and without an organophosphorus flame-retardant aluminum diethylphosphinate. Nanocomposites were compounded by melt mixing method via twin-screw ext…
Effects of phosphorus segregation on stress corrosion cracking (SCC) in the heat-affected zone of an Alloy 182-A533B dissimilar weld joint in high-temperature, oxygenated water doped with SO42− and Cl− were evaluated by creviced bent beam test. Results indicate that step cooling and the addition of Cl− promoted SCC pr…
We combine Mn L2,3-edge X-ray absorption, high resolution Mn 2p-3d-2p resonant X-ray emission, and configuration-interaction full-multiplet (CIFM) calculation to analyze the electronic structure of Mn-based Prussian blue analogue. We clarified the Mn 3d energy diagram for the Mn(2+) low-spin state separately from that…