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。
The effect of fibrinogen and high molecular weight kininogen on bacterial adhesion to functionalized polyurethanes was studied. Glass slides were coated with different polyurethanes, including Pellethane, sulfonated Pellethane, phosphonated Pellethane, a zwitterionic phosphonated polyurethane, and quaternized amine po…
A mean-field theory is introduced to describe nematic-isotropic phase transitions and phase separations in binary mixtures of a liquid-crystal molecule and a semiflexible polymer chain. On the basis of the Onsager model for excluded volume interactions, the Maier-Saupe model for orientational-dependent attractive inte…
Titanium-containing hydrophobic silica with a pore volume and pore sizes in the range of aerogels was prepared by silylation before drying of well-dispersed mixed oxides obtained via a sol-gel method; it showed remarkable properties as a catalyst in the epoxidation of styrene with ButOOH.
Diatom zonal key species are identified in the samples from the Morozaki (the Toyohama, Yamami and Utsumi Formations), Iwamura (the Toyama Formation) and Tomikusa (the Awano and Yonekawa Formations) Groups. These assemblages are characterized by the abundant occurrences of Kisseleviella carina and Stephanopyxis spp. T…
Alpha-Si3N4 powder mixed with SiO2 and Ln2O3 (Ln=La, Gd or Yb) was heat-treated at 1750-1900°C. After removing the glassy phase, the morphologies of β-Si3N4 crystals were quantitatively analyzed. The aspect ratios of β-Si3N4 crystals doped with different lanthanide oxides increased in the order of La2O3>Gd2O3>Yb2O3 at…
New halide-substituted cluster anions [Cd10S4X4(SR)12]4– (R=Ph, X = I, 2a; R = p-MeC6H4, X = I, 3a or Br, 3b) of the [Cd10S4(SR)16]4– family have been prepared and characterized; investigations of their luminescence show that the introduction of the halide groups produces red shifts and significant enhancements in the…
The 2.5 A crystal structure of the full length human placental isoform of the Gly12 to Val mutant Cdc42 protein (Cdc42(G12V)) bound to both GDP/Mg2+ and GDPNH2 (guanosine-5'-diphospho-beta-amidate) is reported. The crystal contains two molecules in the asymmetric unit, of which one has bound GDP/Mg2+, while the other…
The influence of polyurethane compositions and fabrication conditions on the pore morphology and mechanical properties of microporous segmented polyetherurethane (SPEU) grafts, which were produced by the coagulation technique, were carefully investigated in this article. SPEU resins based on polytetramethylene oxide (…
Recent experimental results on the deformation field of single crystal CuNiAl shape memory alloys (SMA) by using Moire´ interference technique are reported and two kinds of austenite-martensite (A-M) interfaces with different deformation features are identified. The experimental discovery questioned the invariant plan…
A new poly(arylacetylene) having a strongly electron donating unit, a tetrathiafulvalene (TTF) unit, in the side chain has been prepared by Rh-catalyzed polymerization, and optical, electrochemical and electric properties of the polymer have been revealed.
The interaction of 5,10,15,20-tetrakis(p-tolyl)porphyrin (H2TTP) and 5,10,15,20-tetraphenylporphyrin (H2TPP) with an excess of YIII[N(SiMe3)2]3·x[LiCl(THF)]3, generated in situ, in refluxing bis(2-methoxyethyl) ether gave the neutral monoporphyrinate complexes [YIII(TTP)(Cl){(CH3OCH2CH2)2O}] 1 and [YIII(TPP)(Cl)(H2O)(…
By means of an inert gas evaporation technique in combination with a simultaneous plasma polymerisation process silver clusters have been prepared within plasma polymer matrices from vinyltrimethylsilane (VTMS) with mean diameters between 1.3 and 4.5 nm and from tetraethoxysilane (TEOS) between 4.8 and 6.2 nm, respect…
The degradation of pure silica MCM-41 materials prepared under various synthesis conditions has been investigated. Materials from preparations titrated with acid during synthesis not only show improved long range ordering of the pore system but also greater stability. This effect is greatest in unheated preparations.
Experiments have shown the feasibility of new composite electrodes ECP(Ox) resulting from the dispersion of nanoparticles of a metal oxide (Ox) into an electrically conductive polymer (ECP). In this preliminary work, Ox was a spinel mixed valence oxide of copper and manganese, , and ECP was polypyrrole. The intimate m…
Superplastic forming is an industrial process which is currently limited by the relatively slow strain rates, and consequent long forming times, associated with the fabrication of each superplastic component. Any expansion of this technology requires both the processing of materials capable of exhibiting high strain r…
Surface modification of low-density polyethylene (LDPE) and polytetrafluoroethylene (PTFE) films via graft copolymerization with acrylic acid (AAc), Na salt of styrenesulfonic acid (NaSS), N,N-dimethylacrylamide (DMAA), 2-(dimethylamino)ethyl methacrylate (DMAEMA), glycidyl methacrylate (GMA), acrylamide (AAm) and 3-d…
A molecular dynamics (MD) study of sodium phosphate glass was performed in order to determine the short range structure. The structure of the glass was analysed and the results compared to those found experimentally using X-ray diffraction. The results from the simulation revealed two phosphorus–oxygen interatomic bon…
This literature review identifies ageing factors and their effects on polymeric insulators. According to their nature, these factors are classified as electrical, mechanical, ultra-violet radiation, chemical, thermal and water ingress. The effects are manifested as external or internal damage with loss of electrical a…
A new type of spin-valves using perovskite antiferromagnets, MFeO/sub 8/ (M=Y,La,Pr,Nd,Sm), as the pinning layers was developed. These spin-valves are composed of MFeO/sub 8//P/Cu/F, where P and F are the pinned and free layers, respectively, and were prepared by sputtering on Si or glass substrates. Among these spin-…
Rhenium-(V), -(VI) and -(VII) complexes of the [α2-P2W17O61]10– isomer, a mono-lacunary derivative of the [α-P2W18O62]6– (Wells–Dawson) ion have been prepared and characterized by multinuclear NMR spectroscopy, electrospray mass spectrometry and electron paramagnetic resonance spectroscopy, among other techniques. The…