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。
A series of new derivatives of the di(2-pyridyl)amine ligand has been prepared, having the general formula (py)2NR, where R is one of a wide range of groups including naphthyl, pyrenyl, benzo-18-crown-6, pyrenyl, oxazolyl and bromo-biphenyl. All ligands are luminescent, with emission maxima between 370 and 520 nm, and…
This work focuses on the study of the mechanical properties and microstructure of plates of thin wall ductile iron, cast in sand moulds of vertical and horizontal configuration. All tests were carried out on ferritised samples. Melts of carbon equivalent values ranging from 4.06 to 4.85 were used to cast plates of thi…
Abstract Summary: Copolyesters of terephthalic acid with bis(hydroxyethyl ether) of bisphenol A (BHEEB) in different molar ratios have been synthesized by reactive blending from terephthalate polyesters and by melt polycondensation from the monomers. By this way, bisphenol A groups were inserted in the polyester chain…
Table 1. The standard set of input parameters in a neural network model of creep rupture strength. The chemical compositions are all in wt%. The cooling rate can be set discreetly to air cooling, furnace cooling or quenching.
Amorphous mesoporous aluminophosphate materials synthesized from precursors of Al(NO3)3/H3PO4/NH4OH in the presence of citric acid, exhibit high specific surface areas, narrow pore size distributions and excellent thermal stabilities.
Commercially available hollow fiber membranes (HFMs) made from synthetic polymers, including cellulose acetate (CA) HFMs, used as hemopurification membranes, need to improve in hemocompatibility, by suppressing protein adsorption and clot formation. In this study, CA HFMs blended with 2-methacryloyloxyethyl phosphoryl…
The adsorption of hexane on mesoporous MCM-41 materials having different pore sizes has been studied by thermodynamic means. Additional information about their textural properties has been found using the BET model and by tracing comparison plots. Extremely low CBET parameters have been found, confirming the very low…
A constant speed, direct-injection diesel engine rated at 7.4 kW was tested on diesel fuel and four different ethanol-1-butanol-diesel microemulsions. The stable and homogeneous microemulsions were obtained by mixing 160., 170, and 180 proof ethanol-1-butanol-diesel in 1:2.5:5.5 as well as 180. proof ethanol-1-butanol…
Abstract Beginning with work by U. von Barth and L. Hedin in 1972 and continuing with recent papers in 2001 by K. Capelle and G. Vignale and by H. Eschrig and W. E. Pickett, questions have been raised about the meaning and validity of Hohenberg–Kohn theory when spin magnetism and/or magnetic fields are present. This a…
Electrochemically monoreduced [M(R,R'timdt)(2)](-) dithiolenes, showing unprecedented wavelength selective photoconducting properties in the third optical fiber window (1500-1800 nm), fine-tunable through modifications in the chemical structure, allowed for the fabrication of a test photodetector with a bit rate of ab…
Nanosized zinc gallate phosphors were prepared via the citric gel route and their luminous properties were characterized by photoluminescence in this study. From the results of X-ray diffraction studies, it was found that a spinel phase of ZnGa 2 O 4 formed after the dry gel had been heat-treated at 470°C for 1 h and…
Ac conductivity (σac) obtained from admittance of Eu2Zr2O7 and La2Ce2O7, which have pyrochlore- and fluorite-type structure, respectively, was measured as a function of frequency in the range between 5 Hz and 13 MHz and in the temperature range between 573 and 1073 K. The frequency dependence of the σac of these oxide…
ABSTRACT: Molecular dynamics simulations have been employed to study the formation of a physical (thermoreversible) gel by amphiphilic A-B-A triblock copolymers in aqueous solution. To mimic the structure of the hydrogel-forming polypeptides employed in experiments [W.A. Petka et al., Science 281, 389 (1998)], the end…
A high-performance composite anode has been developed for solid oxide fuel cells (SOFCs). The anode design is based on the requirements of three-phase boundary theory. The anode material comprises a mixture of composite metal sulfide (Mo-Ni-S) catalyst prepared from and NiS (1:1 weight ratio), admixed with up to 10% e…
Electrochromism has been demonstrated by three novel electrochemically-reversible compounds and, which were synthesised by Pd catalysed cross-coupling of iodotrimethylTTF (6) and 2,6(7)-diiodoTTF (7) with the 2,5-diaryl-1,3,4-oxadiazole derivatives 1 and 2 containing terminal ethyne and butadiyne groups.
The spin interconversion equilibrium involving the [Ni(II)(cyclam)]2+ complex has been investigated in a variety of polar solvents, at varying temperatures. The greater the donor tendencies of the solvent, the higher the endothermicity of the high-to-low-spin conversion. In particular, a positive linear relationship e…
More and more sophisticated theoretical models have been developped for a correct description of the relaxation of the electronic spin S = 7/2 of the Gd(III) paramagnetic complexes used as contrast agents in magnetic resonance imaging (MRI). Both the static zero field splitting (ZFS) modulated by the random rotation o…
OBJECTIVE: Pegylated liposomal doxorubicin (PLD) has shown promising activity in the treatment of recurrent ovarian cancer but skin toxicity remains the dose-limiting toxicity of the drug. The aim of this study was to investigate whether a different treatment schedule may improve the toxicity profile, especially in te…
At present, the recycling plastic materials is mostly done using homogeneous polymers.Therefore a separation of plastic objects from a municipal collection is necessary before recycling operations.The easiest way of separations is by flotation in water, due to the different densities of different plastics with respect…
Core crosslinkable micelles were prepared based on PEG–lipid amphiphiles. The branched hydrophobic domain was prepared by acylation of 2,2-bis(hydroxymethyl)propionic acid (DMPA) with 10-undecenoyl chloride and pyridine as catalyst. Monohydroxyl poly(ethylene glycol) (m-PEG) was conjugated onto the hydrophobic domain…