Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Abstract Hydroxylpropyl‐ β ‐cyclodextrin (HP‐ β ‐CD) was introduced to the surface of magnetic nanoparticles in the presence of NH 3 ·H 2 O to synthesize magnetic HP‐ β ‐CD composite nanoparticles, which were used as a carrier in magnetic targeted drug delivery. The composite nanoparticles were characterized by FTIR,…
Hydrogen production from oxidative steam reforming of methanol (OSRM) was studied over copper supported on mixed ZrO2-CeO2 oxides. Experimental X-ray diffraction (XRD) results showed the formation of mixed oxide solutions on the sample with 50 wt.-% of zirconia in the support, this finding was associated with low surf…
High-purity nanoparticles ZnS has been successfully synthesized using a simple coupling reaction process of biological reduction and chemical precipitation mediated with EDTA referred to as the CRBRCP-EDTA process. This research investigated the optimum conditions of the transformation of SO(4) (2-) into S(2-) by SRB,…
Current-voltage characteristics have been obtained on lead zirconate titanate bulk ceramics using robust measurement techniques separating polarization effects from actual charge transport. Measurement of the electrical conduction upon both increase and decrease in the electric field shows that long settling times are…
Copper specimens have been exposed to the action of marine, marine industrial, urban and rural atmospheres of Saudi Arabia. Environmental factors such as average temperature, average relative humidity and deposition rates of atmospheric pollutants (i.e. Cl- and SO2) was investigated. By applying the standard ISO 9223,…
Calcium-containing spherical bodies (calcospherulites) exist along the mineralization front of bone and are thought to play a role in bone formation. Existing methods to isolate calcospherulites involve harsh treatments that remove much of their organic matter. This study sought to isolate them using a less destructiv…
Compressive stress-strain curves were generated for a pressed and sintered mixture of polytetrafluoroethylene and aluminum powders. Experiments were performed at strain rates ranging from 0.001 to 8000/s using a servo-hydraulic load frame and a split Hopkinson pressure bar. High-rate experiments were also performed ov…
The properties of a polymer are strongly influenced by its morphology. In the case of fibers from semi-crystalline polymers this consists of the degree of crystallinity, the spacing and alignment of the crystalline regions, and molecular orientation of the polymer chains in the amorphous regions. Information on crysta…
A fibre-level model for the longitudinal absorption of liquid water in wood has been developed. The model is primarily intended for simulation of absorption in softwoods. Capillary suction is based on the lumen radius, which is a stochastic parameter. The average lumen volume (and thus radius) is assumed to vary linea…
Steady State Isotopic Transient Kinetic Analysis (SSITKA) experiments using on-line Mass Spectrometry (MS) and in situ Diffuse Reflectance Infrared Fourier-Transform Spectroscopy (DRIFTS) have been performed to study essential mechanistic aspects of the Selective Catalytic Reduction of NO by H2 under strongly oxidizin…
In order to clarify the mechanism of electrical-tree inception and propagation from a water tree within polyethylene, we have investigated temperature dependence of water tree and electrical tree inception and propagation from water-tree degradation. In the samples with water tree of the area above ca. 5000 mum2, the…
The combustion behavior of polypropylene (PP) composites containing intumescent flame retardant additives, i.e., melamine pyrophosphate (MPP) and 1-oxo-4-hydroxymethyl-2,6,7-trioxa-1-phosphabicyclo[2.2.2]octane (PEPA) was characterized by limiting oxygen index (LOI), UL 94 and the cone calorimeter. It has been found t…
A three-dimensional finite element models for phase change random access memory (PCRAM) is established to simulate thermal and electrical behaviours during RESET operation. The RESET behaviours of the conventional structure (CS) and the ring-type contact in bottom electrode (RIB) are compared with each other. The simu…
Abstract We investigate effects of electric current on formations of beads in electrospinning by changing an electric conductivity of a poly(vinyl alcohol) (PVA) aqueous solution and spinning conditions, such as applied voltage, distance between a tip of needle and a collector, and relative humidity. From the results…
Transition-metal hydrogen maleates of composition M(C 4 H 3 O 4 ) 2 · 4H 2 O, where M = Mn, Fe, Co, and Ni, and their solid solutions were synthesized and characterized by X-ray crystallography, IR spectroscopy, mass spectrometry, and thermal analysis. X-ray crystallography and IR spectroscopy showed that both intramo…
Two ferroelectric three‐ring chiral esters, one with a partially fluorinated alkyl chain and another with a cyano terminal group, were mixed with a structurally similar compound having an alkyl terminal chain. In their mixtures an antiferroelectric phase was induced. The phase behaviour, spontaneous polarisation, tilt…
Porous glass beads with a core‐shell structure have been successfully prepared through subcritical water treatment. The product has high capacity and fast mass transfer property due to its structure, and may serve as an inorganic adsorbent. Accordingly, the kinetics, the equilibrium isotherm, and the column breakthrou…
We simulate hot optical phonon decay in small diameter (<0.7 nm) carbon nanotubes, solving the phonon Boltzmann transport equation using Monte Carlo methods incorporating the full phonon spectrum and phonon-phonon scattering. Results indicate decay times inversely proportional to the lattice temperature with ne…
The increase in depolarization temperature induced by the poling of (Li x Na 1- x )NbO 3 ceramics having an Li concentration of x = 0.08 (LNN8) was studied. Initially, the Curie temperature T C was measured to be approximately 300 °C, and it increased after the application of poling at high electric fields; this incre…
Molecular dynamics simulations are used to characterize ferroelectricity on the (001) surfaces of PbTiO 3 (PT), one of the most widely studied ferroelectric materials. Two different empirical interatomic shell model potentials are used. Both PbO and TiO 2 surface terminations in PT under open circuit electrical bounda…