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。
It is expected that fuel cells will play a significant role in a future sustainable energy system due to their high energy efficiency and possibility to use as renewable fuels. Fuels, such as biogas, can be produced locally close to the customers. The improvement for fuel cells during the past years has been fast, but…
A simple and template-free solution phase synthesis method has been developed for the preparation of novel CdS hollow microspheres using cadmium nitrate and thioacetamide precursors. In this manuscript, we demonstrate that process parameters such as the reaction time, precursor ratio, and reaction temperature strongly…
We find numerically that a regular array of isolated ring defects can exist as a stable state in a highly chiral liquid crystal confined in a thin cell imposing fixed planar anchoring at the parallel confining surfaces. This peculiar defect structure can be stable when the cell thickness d is around 3/4 of the helical…
As a result of a continuous evolution in the field of small-scaled components, an increasing need exists for mechanical characterization of single structures and materials in micrometer dimensions. Moreover, for a detailed analysis of the deformation and failure behavior, it is often necessary to perform investigation…
Photocatalysis is a promising technology for wastewater treatment, particularly for mineralization of nonbiodegradable and toxic components in wastewater. TiO 2 is usually utilized as photocatalyst in slurry reactors in order to overcome mass transfer limitations. The difficulty in recovering TiO 2 photocatalyst from…
The variation of luminescence and excitation spectra of titanium doped Al2O3 for the concentration of Ti ranging from 10 to 1000 ppm was investigated using synchrotron radiation. In the lightly doped Al2O3–Ti (<100 ppm) samples we identified several emission bands. These are the emission of the excitons localiz…
Ab initio simulations and calculations were used to study the structures and stabilities of copper oxide clusters, Cu(n)O(n) (n = 1-8). The lowest energy structures of neutral and charged copper oxide clusters were determined using primarily the B3LYP/LANL2DZ model chemistry. For n ≥ 4, the clusters are nonplanar. Sel…
Abstract The vulcanization of natural rubber and a blend of natural rubber and reclaimed rubber by using binary accelerator systems containing a novel series of benzothiazoloylthiazole as secondary accelerator (SA) has been studied. These secondary accelerators were synthesized by a green chemical method under solvent…
The preparation of highly water-dispersible titanium-silicon binary oxide materials was performed by the following two-stage sol-gel reactions. First, the mixture of titanium tetraisopropoxide and 3-aminopropyltrimethoxysilane was stirred in a mixed solvent of isopropyl alcohol and 0.5 mol/L methanolic hydrochloric ac…
This investigation was carried out to estimate and compare comfort properties of blended yarns and knitted fabrics, made with different proportions of cottonised flax and long staple Egyptian cotton (Giza80) using ring spinning system. Cottonised flax was blended in proportions of 30%, 50% and 70% with Giza 80 on draw…
Thalassiosira is a large diatom genus intensively studied since the 1970s, being well represented in diverse marine environments worldwide. Despite the long Brazilian coastline, about 8,500km, few taxonomic works have been performed to investigate the morphology of Thalassiosira species using electron microscope techn…
Rotor Speed is an important factor which impacts the mixing process and quality of mixed rubber greatly. The effects of different rotor speeds on manufacturing process of short fiber-rubber composite material have been studied by experimental study. In the experiments, the rotor speeds were 50rpm, 60rpm, 70rpm and 80r…
O desenvolvimento de nanocompósitos para recobrimento de superfícies de partículas tem sido alvo de inúmeras pesquisas, devido ao fato de que novas e incomuns propriedades físicas e químicas, ausentes em tamanho macro e microscópico, são observadas nesses novos nanomateriais. Este trabalho apresenta o procedimento de…
Hardness and toughness are the main properties determining wear resistance and performance of high speed steel tools. The objective of the present paper was to study the effect of hardening conditions on the toughness of high speed steels, mainly concerning the hardening temperature and cooling rate during quenching.…
The effect of surfactants on the solubility and intrinsic dissolution rate of sparfloxacin was investigated at room temperature. The surfactants used in the study were anionic sodium lauryl sulfate (SLS) and nonionic polysorbate 80 (Tween 80). Sodium lauryl sulfate showed very significant increase in solubility Tween…
We monitored the imidization process of poly(amic acid) synthesized from pyromellitic dianhidride and 4,4′-oxydianiline,and analyzed the IR bands of the poly(amic acid) and the polyimide after thermal imidization using variable temperature FTIR spectroscopy in transmission mode.We investigated peak assignments of the…
We studied crystallization behaviors of amorphous C-Sb films to evaluate their applicability in phase-change memory. C-Sb thin-films with 92 to 50 at% Sb were deposited by co-sputtering from elemental targets. In-situ electrical resistance-temperature measurement, differential thermal analysis, and grazing-incident X-…
This paper reports that the (Ga, Co)-codoped ZnO thin films have been grown by inductively coupled plasma enhanced physical vapour deposition. Room-temperature ferromagnetism is observed for the as-grown thin films. The x-ray absorption fine structure characterization reveals that Co 2+ and Ga 3+ ions substitute for Z…
An original method of immobilization of nongrowing microorganism cells on xerogel of silicon dioxide containing insoluble hydroxyl compounds of cobalt(III) has been developed. A recombinant strain producing glucose isomerase has been constructed on the basis of Escherichia coli with the use of a gene of Arthrobacter n…
5-(8-ethoxycarbonyl-1-naphthyl)-10,15,20-triphenyl porphyrin (ENTPP) has been synthesized in a one-pot reaction, and the corresponding chiral crystalline samples have been obtained by spontaneous resolution. 1 H NMR spectrum suggests it is mononaphthyl substituted species and an ethyl group is over the porphyrin plane…