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。
In tensile tests the flax/polypropylene composites clearly show nonlinear behavior in loading and hysteresis loops in unloading. In creep tests performed at different load levels the response was nonlinear viscoelastic, and after recovery, viscoplastic strains were detected. No degradation in stiffness could be seen a…
Electrical transport properties of cobalt doped polyaniline in an aqueous ethanol medium were investigated in the temperature range 77 ⩽ T ⩽ 300 K, applying magnetic fields up to 1 T in the frequency range 20 Hz–1 MHz. The room temperature dc resistivity increases with increase in Co content. The dc resistivity and ma…
Photoluminescent germanium nanocrystals were synthesized in solution using hydride reducing agents. The surface of the Ge nanocrystals was modified with allylamine to produce water-soluble photoluminescent Ge nanocrystals. When the reducing agent was added slowly, the particles were 5 nm in size with a narrow size dis…
A novel approach toward "locked" chlorins with increased stability has been studied in detail. The chlorin skeleton is assembled in a convergent fashion from two fragments via a porphyrin forming reaction, followed by 1,3-dipolar cycloaddition of azomethine ylides, which are formed in situ. Central to the success of t…
This paper reports the development of optimal vascularization for supplying self-healing smart materials with liquid that fills and seals the cracks that may occur throughout their volume. The vascularization consists of two-dimensional grids of interconnected orthogonal channels with two hydraulic diameters (D1, D2).…
Published data on modification of oxide materials with phosphonic and phosphinic acids and their derivatives are systematised and generalised. The regularities of formation of grafted modifier layers on the oxide surfaces are considered. It is shown that phosphonic acids and their derivatives can form dense well-order…
Mycobacterium tuberculosis alpha-isopropylmalate synthase (MtIPMS) catalyzes the condensation of acetyl-coenzyme A (AcCoA) with alpha-ketoisovalerate (alpha-KIV) and the subsequent hydrolysis of alpha-isopropylmalyl-CoA to generate the products CoA and alpha-isopropylmalate (alpha-IPM). This is the first committed ste…
Arrays of vertically well-aligned ZnO nanorod–nanowall junctions have been synthesized on an undoped ZnO-coated silicon substrate by a carbothermal reduction and vapour phase transport method. X-ray diffraction (XRD) and scanning electron microscopy (SEM) show that the nanostructures are well-oriented with the c-axis…
We report here the crystal structure of a trehalose-6-phosphate phosphatase-related protein (T6PP) from Thermoplasma acidophilum, TA1209, determined by the dual-wavelength anomalous diffraction (DAD) method. T6PP is a member of the haloacid dehalogenase (HAD) superfamily with significant sequence homology with trehalo…
Isomerisierung des Liganden und kooperative Metall-Ligand-Wechselwirkungen liefern das rechts gezeigte ternäre Ensemble, das sich zum Erkennen und Quantifizieren von Cystein und Homocystein eignet. Der freie Ligand (links) ist in Lösung rotviolett, doch bei gleichzeitiger Zugabe von Metallionen und Cystein oder Homocy…
FT-IR and 2D correlation spectroscopy were employed to study the microstructural changes occurring during phase transitions of a liquid crystal poly(amidoamine) codendrimer (PAMAM (L1)16(L2)16) generation 3, functionalized on the terminal groups by one-chain promesogenic calamitic units (4-(4'-decyloxybenzoyloxy)salic…
Single-crystalline platinum nanorods, monodisperse in diameter, are synthesized through a simple process at room temperature, in cetyltrimethyl ammonium bromide (CTAB) solution. The complexation of the CTA+ surfactant ion with tetrachloroplatinate in the presence of hexanol leads to the formation of a precipitate with…
Poly(styrene- b -caprolactone)/silicate nanocomposites were prepared via one-pot, one-step in-situ living polymerization from a silicate-anchored bifunctional initiator. The random dispersion of the silicate layers in the polymer matrix was confirmed by both XRD and STEM. The polymer chains were attached to the surfac…
The behavior of a simple concrete beam driven by heated shape memory alloy (SMA) wires using electrical currents is studied in this paper. The test results indicate that recovery forces of the SMA wires can decrease the mid-span deflection of the simple concrete beam, decrease the absolute value of compressive strains…
Carbon nanotubes have attracted intensive interests in biomedical research in recent years. In this study, a novel type of carbon nanotubes material so called nonwoven single-walled carbon nanotubes (SWNTs) with nanotopographic structure and macroscopic volume was used as cell growing scaffold. The morphology and surf…
Luminescent organoboron complexes featuring substituted 8-quinolinolates as chelating ligands have been synthesized and characterized. Substitution of the quinolinolate has been achieved in the 5 and the 7 positions introducing phenyl, biphenyl, and 9,9‘-dihexylfluorenyl substituents by reacting 8-benzyloxy-5,7-dibrom…
The results of theoretical and experimental studies on the second-order molecular and crystal nonlinear optical susceptibilities of organic and several classes of organoelement compounds are summarised. Modern methods used in these studies are briefly characterised, their advantages and drawbacks are outlined as regar…
Chitosan was added to PVA aqueous solutions as a thickener to improve the electrospinning process. The presence of a small amount of chitosan considerably improved the uniformity of as-spun nanofibres. This improvement is attributed to its significant effect on the solution viscosity and conductivity, with only a slig…
An interatomic potential for zinc oxide and its elemental constituents is derived based on an analytical bond-order formalism. The model potential provides a good description of the bulk properties of various solid structures of zinc oxide including cohesive energies, lattice parameters, and elastic constants. For the…
A resonant Raman mode located at 1855 cm−1 is related to vibrations of linear carbon chains and observed as a precursor to the merging of highly purified double-walled carbon nanotubes (DWNTs, see figure). This mode, termed the “coalescence-inducing mode” (CIM), which initiates the coalescence process, is induced by t…