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 polyester fabric was treated by corona discharges. Surface modification was carry out using a laboratory prototyped device. A quantity of acid groups formed on the surface of fibres was determined and normalised activation energy [E j] was selected, required to apply the Layer-by-Layer (L-b-L) method. Contact angles…
Nickel promoted tungsten carbide catalysts have been tested in the liquid phase oxidation of cyclohexanone to adipic acid by molecular oxygen. Catalysts were prepared by the carbothermal hydrogen reduction method and characterized by XRD and TPR. A strong influence of activated carbon used on the formation of crystall…
At the heart of the ideas of the work of Dutch graphic artist M.C. Escher is the idea of automation. We consider one such problem that was inspired by some of his earlier and lesser known work [MWS96, Sc90, Sc97, Er76, Es86]. From a finite set of (possibly overlapping) connected regions within a unit square (Figure 1)…
采用溶胶-凝胶法，以正硅酸乙酯为无机先驱体、盐酸为催化剂合成二氧化硅（SiO2）溶胶；以过硫酸钾（K2S2O8）为引发剂，将SiO2溶胶与甲基丙烯酸-β-羟乙酯（HEMA）反应合成SiO2/聚甲基丙烯酸-β-羟乙酯（PHE—MA）凝胶。讨论了温度、无水乙醇和稀盐酸的体积比、K2S2O8和HEMA的用量对溶胶-凝胶的影响。用傅里叶变换红外光谱仪和差热分析仪对SiO2／PHEMA凝胶进行了表征。研究表明：温度越高．溶胶-凝胶时间越短：无水乙醇和稀盐酸体积比为2时，溶胶时间最短；增大HEMA、K2S2O8用量，加速凝胶形成；SiO2／PHEMA为杂化材料，其耐热性高于PHEMA．
Surface-enhanced Raman scattering (SERS) has attracted a renewed interest in recent years due in part to single molecule detection and the fabrication of new metal nanostructured substrates [1,2]. The optical properties associated with the excitation of plasmon resonances on metal nanoparticles (NPs) are known to be c…
The radioactivity concentration of the natural radionuclides ( 40 K, 238 U and 232 Th ) in the top soils of University of Ibadan (UI), Ibadan, Nigeria have been determined by gamma ray spectrometry. The activity concentrations of 40 K, 238 U, and 232 Th
Around the world, but particularly in developing Member States, there are disused nuclear facilities or those approaching the end of their useful lives, for which appropriate decommissioning steps have not been taken, primarily due to limited technical and financial resources or competing priorities. One way of allevi…
Electrochemical and spectroelectrochemical properties of molecular glass 3,4-ethylenedioxythiophene-2-carbaldehyde N,N-diphenylhydrazone are reported. 3,4-ethylenedioxythiophene-2-carbaldehyde N,N-diphenylhydrazone showed glass transition at 37 °C and relatively high thermal stability with the initial decomposition te…
In the work it is considered influence of experimental factors on analyzing power processes of ee-pairs photoproduction in the field of nuclei and atomic electrons (triplet photoproduction), which can be used for measurement the linearly polarizations of photon beams in the energy range 30-3000 eV. Modeling has shown…
Marine phytoplankton (microalgae and cyanobacteria) play a vital role in the global carbon cycle. It is therefore essential to understand the mechanisms involved in inorganic carbon (C) acquisition by these organisms. I examined C uptake strategies of natural phytoplankton assemblages in the Bering Sea and numerous in…
EnergySolutions has been processing organically contaminated mixed waste through a vacuum assisted thermal desorption unit (TDU) at the Clive, Utah Treatment, Storage, and Disposal Facility (TSDF) since late 2003. Initial Demonstration Testing of the TDU was completed in September, 2004, and permitted operations for t…
The electrical and magnetic characteristics of La 0.7 Sr 0.3 MnO 3 (LSMO) epitaxial manganite films are investigated by different methods under conditions when the crystal structure is strongly strained as a result of mismatch between the lattice parameters of the LSMO crystal and the substrate. Substrates with lattic…
The results of investigation of the effect of disperse ferrosilicon additions in charge mixture “pitch coke + coal-tar pitch” on properties of graphitized samples after high-temperature annealing at 1800 °С, 2200 °С and 2600 °С are stated. Ferrosilicon addition in quantity of 1 % provides commensurable parameters by d…
A homogenization framework is established in \n order to construct constitutive equations for heterogeneous materials accounting for \n strain or stress gradients. The micro-crack density, the micro-crack size influence \n directly the global constitutive behavior. This is more accurately when the size of the \n heter…
The vast number of currently available manufacturing processes creates a necessity for the use of CAx systems such as CAE, CAPP and other analysis and computer aided selection systems. Although process selection may be a trivial task for manufacturing centres with a reduced range of technologies or for highly speciali…
Cataloged from PDF version of article.
Tuberculosis (TB) is a serious infectious dis ease mainly caused by Mycobacterium tuberculosis. With the increasing worldwide incidence of TB, there is an urgent need for developing new drugs and vaccines. Xanthine dehydrogenase is an enzyme in the metabolism of nucleotides responsible for the conversions of hypoxanth…
The influence of a single- and two-stage drawing process on the structure and properties of fibres made from a polyimidoamide (PIA) nano-composite containing montmorilloniten (MMT) were investigated. A comparative property analysis of the fibres tested enabled the selection of appropriate technological conditions for…
Abstract: The solution of Heisenberg Hamiltonian with second order perturbation will be described for non-oriented spinel cubic ferrimagnetic materials. The perturbation related to the change of angle at the interface of two cells will be considered. The energy peaks become sharper and peak position varies in energy-a…
AbstractBy assuming that not only counter-ions but DNA molecules as wellare thermally distributed according to a Boltzmann law, we proposea modified Poisson-Boltzmann equation at the classical level as start-ing point to compute the effects of quantum fluctuations of the elec-tric field on the interaction among DNA-cation…