Materials Literature
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Selectivity-determining steps for ethylene hydroformylation, i.e., ethyl hydrogenation versus CO insertion on Rh(111) and Rh@Cu(111) surfaces were investigated by density functional theory calculations. Compared with the Rh(111) surface, the Rh@Cu(111) surface decreases the hydrogenation barrier by 0.12 eV and more si…
The change mesomechanism of split tensile strength of concrete deteriorated by soft water was analyzed based on meso-fracture mechanics and experimental results.A special device was designed to simulate the leaching of concrete caused by soft water.Some experiments were conducted to test the porosity and the split ten…
摘要： 制备了石墨烯(CRG)-壳聚糖(CS)修饰玻碳(CRG-CS/GC)电极，用循环伏安法和示差脉冲伏安法研究了五氯酚(PCP)的电化学行为，发现其氧化电流信号与GC电极相比明显增强，表明修饰电极对PCP具有较强的吸附作用，并能够加速电子传递。 建立了一种灵敏简便、重现性好、稳定性好的测定PCP的新修饰电极方法，线性响应范围为1.00×10-7~1.00×10-5 mol/L（R=0.9975），检测限为2.3×10-8 mol/L(S/N=3)。 将该修饰电极应用于实际水样分析，回收率为97%~103%。
Abstract not provided.
This article proposes WT (Wavelet Transform) and an ANN (Artificial Neural Network) based approach for detection and classification of EPQDs (Electrical Power Quality Disturbances). A modified WT known as ST (Stockwell Transform) is suggested for feature extraction and PNN (Probabilistic Neural Network) for pattern cl…
The sintering behavior of ITO ceramics with the addition of fine and coarse SiC was studied. SiC addition promoted the densification of ITO during early stage sintering compared to pure ITO. On the other hand, the addition of SiC resulted in the development of numerous pores in the microstructures due to the oxidation…
The chiral Cd(II) complex {[Cd(L)(CH 3 COO) 2 (H 2 O)]·H 2 O} n {L = 1,1′-[bis-3-(3-pyridyl)pyrazol-5-yl]ferrocene} has been synthesised. The Cd(II) ion is coordinated by two pyridyl nitrogen atoms, two chelating acetate anions and one water molecule, showing a distorted pentagonal-bipyramidal coordination environment…
Objectives The transplantation of bone-marrow derived mesenchymal stem cells (MSCs) to ischaemic myocardium is considered to be a useful therapeutic approach to ischaemic heart disease, but the MSCs delivery efficacy still can't meet the needs for therapy. Recently, ultrasound-targeted microbubble destruction (UTMD) h…
A simple catalytic pyrolysis route was developed to prepare one-dimensional Fe3O4@C composites using waste polypropylene as carbon resource, in which the Fe3O4 nanoparticles were self-assembled to necklace-shaped structures. The products were characterized by means of X-ray power diffraction (XRD), Raman spectra, fiel…
We report the use of a new precursor as active agents to promote the growth of carbon nanotubes (CNT) in methane ambient using a simple thermal chemical vapour deposition method. The agents consist of ammonia and methanol mixed at different ratios and was found to enhance the growth of CNTs. The optimum methanol to am…
Abstract The synthesis and characterization of new zinc(II) 3 , nickel(II) 4 and cobalt(II) 5 phthalocyanines complexes carrying macrocyclic N 3 O 2 groups on peripheral positions are described. The compounds were characterized by elemental analysis, IR, 1 H and 13 C NMR, UV-Vis and MS spectral data.
SnO 2 nanopowder was synthesized by calcining metastannic salt (SnO 2 ·H 2 O) prepared by chemically etching metallic Sn in aqueous HNO 3 solution. The calcined SnO 2 nanopowder was investigated by X-ray diffraction (XRD) measurement and photoluminescence (PL) spectroscopy. The XRD and PL intensities increased with in…
A porous ceramics is obtained using rice husk as the source of silica. The modification of mesoscopic structure under different sintering conditions has been investigated using neutron scattering techniques and scanning electron microscopy. X-ray diffraction confirmed the purity of silica by comparing the diffraction…
Objectives Photodynamic therapy (PDT) has been shown to attenuate atherosclerotic plaque progression and decrease macrophage-infiltration. The effectiveness of PDT depends strongly on the type of photosensitizers. Hematoporphyrin monomethyl ether (HMME) is a promising second-generation porphyrin-related photosensitize…
The electronic structures and optical properties of N-doped, Ti-doped and TI/N-codoped SiO2 have been investigated by the means of first-principles calculations. Our results indicate the introduction of doped ions can significantly reduce the band gap compared to the SiO2 system, nearly by 1.4 eV on average, which may…
We investigated the quantum dots-templated growth of a (0001) GaN film on a c-plane sapphire substrate. The growth was carried out in a radio-frequency molecular beam epitaxy system. The enlargement and coalescence of grains on the GaN quantum dots template was observed in the atom force microscopy images, as well as…
In this work we systematically review our theoretical results about the interaction of important p-type impurities with hydrogen in ZnO. Our investigations indicated that a H atom in ZnO might migrate through different pathways to reach the sites nearby acceptor impurities (N, Li and Ag), forming stable complexes of N…
The title compound (H2tpsac) was synthesized from 6-bromosaccharin and 3,3’’-bis(bromomethyl)- m-terphenyl. The ability of tpsac to serve as a tetradentate bis-bridging ligand was demonstrated by the formation of the dinuclear ruthenium(I,I) complexes [Ru2(CO)5(μ,μ-tpsac)]2, [Ru2(CO)4(μ,μ-tpsac)]n, [Ru2(CO)4(PPh3)2(μ,…
Accelerator production of radionuclides for diagnostic and therapeutic research at a university has many advantages. Radionuclides not commonly available through commercial suppliers may be readily produced for innovative research applications. Loss of material due to decay in transit is minimized, and product lead ti…
The effects of Ga 3+ and Li + co-doping on the solubility limits and densification behavior of ZnO were examined. When Ga and Li were co-doped at a 1:1 ratio, the overall solubility of Ga and Li increased to approximately 40 at% (20 at% of Ga + 20 at% of Li). The lattice parameter decreased with increasing Ga and Li c…