Materials Literature
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Progress in diesel engine and filtration materials have made it easier to apply a burner type diesel particulate filter (DPF) in emission control. A full-flow burner type regeneration system is developed to remove diesel particulate matter (PM) deposited in DPF. Auxiliary air from a turbocharger is used to assist the…
This article reports on the studies of porous GaN prepared by ultra-violet (UV) assisted electrochemical etching in a solution of 4:1:1 HF: CH3OH:H2O2 under illumination of an UV lamp with 500 W power for 10, 25 and 35 minutes. The optical properties of porous GaN sample were compared to the corresponding as grown GaN…
Abstract Asymmetric transfer hydrogenation of acetophenone with isopropanol as a hydrogen donor in the presence of a homogeneous catalyst and simultaneous acetone removal by stripping has been performed in a microstructured mesh contactor that consists of parallel metal plates, gaskets and a microstructured mesh so th…
Abstract Dual flue gas conditioning (DFGC) deals with the addition of chemical additives such as ammonia and sulfur trioxide, simultaneously, to the flue gas for increasing the ash collection efficiency of electrostatic precipitators (ESPs). Previous studies with ammonia as the conditioning agent [i.e., ammonia flue g…
Abstract BACKGROUND: The main aim of this work was to prepare poly[(ethylene terephthalate)‐graft‐(N‐isopropylacrylamide)] (PET‐graft‐NIPAAm) track membranes with various pore shapes and pore sizes, and to investigate the influence of pore shape and pore size on the thermo‐sensitive properties of the membranes. The PE…
Collagens from various vertebrate tissues were tested for their ability to consume complement (C) activity upon incubation in human serum or with isolated components of complement. 10 of 12 collagens tested had anticomplementary activity. The heat-denatured form of collagen, gelatin, was found weakly anticomplementary…
Highway tunnels are mostly paved with asphalt concrete pavement. One of the components, asphalt is inflammable. And once it is ignited, large quantities of heat, smoke and poisonous gas are released and spread quickly, in tunnel fire, which will cause the difficulties of the escape and rescue seriously. This paper pre…
Abstract First order reversal curves (FORC) of nanocomposite Nd 2 Fe 14 B/Fe 3 B magnetic materials were measured to attain a FORC diagram, which characterizes reversible magnetization, irreversible magnetization, and magnetic interactions in a hysteresis system. Then, generalized moving Preisach model (GMPM) was impl…
Using the density-functional method SIESTA, nonlocal norm-conserving pseudopotentials and the generalized gradient approximation to exchange and correlation, we show that the two ionization energies of the photoionization spectrum of Mn(13) can be attributed to the presence of the ground state and an excited spin isom…
Taking laser as the heat source for ceramic sintering, 0.94K0.5Na0.5NbO3-0.06LiTaO3 ceramics with unique physical properties were prepared. Fine ferroelectric properties with remnant polarization of 18 μC/cm2 and coercive field of 18.8 kV/cm were obtained. The piezoelectric properties and density of the ceramics were…
Buckyballs mit Spikes: [70]Fulleren wurde in die Zwei- und Dreikernkomplexe [M2(C70Ar6)Cp2], [M2(C70Ar7H)Cp2] und [M3(C70Ar7)Cp3] überführt (M=Fe, Ru; Ar=Aryl; Cp=C5H5; siehe Bild: M violett, C rosa, blau, grau), in denen die Metallatome über das π-konjugierte System des Fullerens elektronisch wechselwirken. Die Kompl…
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” opt…
Ultra-High Performance Fiber Reinforced Concrete (UHPFRC), characterized by its outstanding mechanical and ductile performance, have received significant attention recently in the construction. In this paper, curing of UHPFRC cubes and prisms at 20°C and 90°C has been investigated to quantify the differences in both m…
Nanosized (12−17 nm) zirconia particles with a thin alumina shell (<6 nm) were studied at pressures up to 40 GPa by synchrotron X-ray diffraction. The tetragonal zirconia changed to a cubic structure ( Fm 3̅ m ) gradually beginning at 10 GPa, and then transformed to an orthorhombic structure (cotunnite type) at pressu…
The well-established catalyst-free sonogel route was successfully implemented to fabricate highly pure, optically active, solid state polymeric azo- dye/SiO2-based hybrid composites. Bulk samples exhibit controllable geometrical shapes and monolithic structure with variable dopant concentrations. Since the implemented…
Abstract Magnesium powders were mechanically alloyed with SiO 2 powder particles having different particle sizes using high‐energy ball milling techniques under Ar atmosphere for 1 h. The powders were consolidated with cold pressing under 560 MPa. They were then sintered at 550°C for 45 min under Ar atmosphere. The co…
We present an experimental and theoretical study of the conductance and stability of Mg atomic-sized contacts. Using mechanically controllable break junctions (MCBJ), we observed that the room temperature conductance histograms exhibit a series of peaks, which suggests the existence of a shell effect. Its periodicity,…
Abstract Titanium dioxide (TiO 2 ) films with rod‐like and sphere‐like TiO 2 particles were prepared on glass slides employing the sol‐gel method. The shape and size of TiO 2 particles were controlled using different concentrations of sodium dodecylbenzensulfonate (SDBS). By increasing the mole ratio of SDBS, the shap…
NO x storage–release and soot oxidation have been studied using strontium promoted zirconia with different surface areas. It was found that the amount of the adsorbed NO x increases with the increase of the support surface and Sr concentration up to 20 wt% Sr. Introduction of platinum has no effect on the amount of NO…
A nearly complete global network can reliably spot secret nuclear explosions, researchers say. Will holdout nations now ratify the test ban?