Materials Literature
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We investigated the temperature dependence of the charge disproportionation in the charge ordered quasi one-dimensional conductors (TMTTF) 2 AsF 6 and (TMTTF) 2 PF 6 by infrared spectroscopy. In the mid-infrared, we observed a splitting of characteristic vibronic modes below the charge-order transition which can be di…
Additional to a correct color and a high efficiency, phosphors for plasma display panels must maintain their light output for thousands of hours. Often the degradation is the restricting factor in using phosphors. In this article, the mechanism of luminance decrease in blue-emitting BaMgAl10O17:Eu2+ phosphor during th…
Article Role of Quaternary Ammonium Compounds and ATMP on Biocidal Effect and Corrosion Inhibition of Mild Steel and Copper was published on December 1, 2005 in the journal Corrosion Reviews (volume 23, issue 4-5-6).
XPS measurements of poly(ethylene imine) recorded with a SSX-100 spectrometer in standardized experimental conditions are presented: survey scan, high resolution core level spectra as well as the energy loss regions of carbon and nitrogen peaks are analyzed. This is part of a contract work aiming to record spectra in…
3-Phosphoglycerate kinase (PGK) is a two-domain hinge-bending enzyme. It is still unclear how the geometry of the active site is formed during domain closure and how the catalytic residues are brought into the optimal position for the reaction. Comparison of the three-dimensional structures in various open and closed…
The chemical microstructure of poly(butylene terephthalate) (PBT) copolymers obtained by incorporation of a rigid diol, 2,2-bis[4-(2-hydroxyethoxy)phenyl]propane (Dianol 220), into PBT using solid-state polymerization (SSP) and melt polymerization (MP) was analyzed. 13 C NMR sequence distribution analysis showed that…
The results of single-rod and bundle ballooning tests with VVER (E110 type) cladding are presented. The comparative study of E110 and Zircaloy-4 showed a significant difference in behavior at 800 to 1000°C. The local maximum of mechanical strength was observed at a low oxidation rate. The pressurization rate played a…
In this paper, a comprehensive open-source three-dimensional (3-D) finite-element method (FEM) is proposed to model the dynamic behavior of liquid crystal (LC) directors in complex structures. This dynamic model is based on interactively iterating the vector representation of director profile and potential distributio…
Purpose – To investigate the capability of a series of nitrogen‐based heterocyclic organic compounds in inhibiting corrosion of iron in HCl and elucidate the dominant active form of the applied compounds during the adsorption process to explore the mechanism of their action.
ESR, NMR and X-ray measurements were performed for pristine and fully perdeuterio-TMTTF, TMTTF- d 12 salts. Significant enhancement by deuteration of the charge-order phase transition temperature, T CO , was observed in ESR measurements for all (TMTTF) 2 X salts measured. No obvious relation between the SbF 6 anion mo…
The effects of preheating and pyrolysis temperatures and catalyst concentration on the synthesis of aligned carbon nanotubes (CNTs) using ferrocene as the catalyst and xylene as the carbon source in chemical vapor deposition were experimentally studied. The as-grown aligned CNTs were characterized by field emission sc…
Maize starch was subjected first to oxidation using H2O2 in presence and absence of ferrous sulfate as catalyst and then to cationization using 3-chloro-2-hydroxypropyl trimethyl ammonium chloride. A thorough investigation of the chemical and rheological characteristics of the oxidized starch and oxidized-cationized s…
Stable and persistent phosphorus-containing radicals can be divided into five general categories: phosphinyl, diphosphanyl, 1,3-diphosphaallyl, lithiated tetrakisimidophosphates, and phosphaverdazyl systems. The syntheses, structures, EPR spectroscopic characterization, and sources of stability of these neutral radica…
Dynamic light scattering (DLS), Transmission electron microscopy (TEM) and Small Angle Neutron Scattering (SANS) experiments are performed on biodegradable gelatin nanoparticles for size measurements and stability analysis. Though gelatin nanoparticles were previously prepared by the desolvation method [1], the simple…
The variations in the energy deposited by ions in thin silicon layers and submicron volumes are calculated using Monte Carlo and convolution methods. For the /spl delta/-electron spectra we use a detailed spectrum, considering solid state effects. For each ion, the energy it deposits in a sensitive (to single events)…
It is believed that space charge build-up in cross-linked polyethylene (XLPE) insulation is the main cause of premature failure of underground power cables. The space charge activities in XLPE depend on many factors such as additives, material treatment, ambient temperature, insulator/electrode interface, etc. Degassi…
Electrical tracking develops from surface discharge activity associated with the flow of leakage current on insulator surface under wet and contaminated conditions. Arcs created from this surface discharge phenomenon burn the polymer insulator material and create carbonized tracks in the long run. This paper reports o…
Abstract SWy-1 and SAz-1 smectites and an Italian bentonite from Sardinia were mechanically deformed via high-energy ball milling for 20 h, in a controlled thermodynamic environment at constant temperature (25°C) under vacuum. The deformed smectites have a lower cation exchange capacity (CEC) and form thicker particle…
The size- and composition-controlled synthesis of Ni-P nanospheres from nickel chloride and sodium hypophosphite has been systematically investigated by changing the conditions, such as the ratio of the starting materials, pH value, and reduction temperature. It was found that when the starting ratio of H2PO2(-)/Ni2+…
This paper reviews the regulatory history for nitrogen oxides (NOx) pollutant emissions from stationary sources, primarily in coal-fired power plants. Nitrogen dioxide (NO2) is one of the six criteria pollutants regulated by the 1970 Clean Air Act where National Ambient Air Quality Standards were established to protec…