Materials Literature
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A novel DTPA-tris(amide) derivative ligand, DTPA-N,N''-bis[bis(n-butyl)]-N'-methyl-tris(amide)(H2L3) was synthesized. With Gd3+, it forms a positively charged [Gd(L3)]+ complex, whereas with Cu2+ and Zn2+ [ML3], [MHL3]+ and [M2L3]2+ species are formed. The protonation constants of H2L3 and the stability constants of t…
Biomedical polymers that are designed to degrade faster at slightly acidic pH values may potentially be developed for use in drug delivery, pharmaceutical formulation and regenerative medicine. Water-soluble polyacetals derived from two well known pendent functionalised tyrosine-based diphenol monomers were prepared.…
A study was carried out to examine copper immersion deposition on AZ91 magnesium alloy in a hydrofluoric acid-containing bath. The role of fluoride and the effect of bath temperature were investigated. The study was performed by measuring the ac impedance and open-circuit potentials in combination with X-ray photoelec…
Nanoscale grains of crystalline TixSn1-xO2 were directly grown over the whole range of [Ti]/([Ti] + [Sn]) ratio (x = 0.00-1.00) in aqueous solutions at near room temperature.
Abstract This article provides an overview of the identification systems for various grades of wrought stainless steels, namely, the American Iron and Steel Institute numbering system, the Unified Numbering System, and proprietary designations. It elaborates on five major families of stainless steels, as defined by th…
Using two complementary methods: x-ray absorption and crystal field spectroscopies, the Ni sites and their distribution in glass have been determined, in order to rationalise the structural dependence of glass properties. In borate glasses, the structure of the glass related to its composition is responsible for the N…
In 10MW High Temperature Gas-cooled Reactor (HTR-10), the wear of graphite components generates the graphite dust to influence the normal working of the reactor. The graphite dusts come from three parts: core, unload pipe and load pipe. Based on the graphite wear experiments, we here estimated that the graphite genera…
Ni-ceria cermets with 7.5, 11, and 14 vol % of Ni manufactured by a novel method, called net-shape technology, are presented and evaluated.The method is a combination of conventional ceramic sintering and a polymer precursor impregnation technique.Ceria powder with a carbon pore former is sintered, constructing a rigi…
There are several methods of testing porosity and relevant quantities such as pore size, pore size distribution, pore diameter etc. The intra-yarn porosity of polyester staple yarns with different cross-section shapes has been studied in this paper using mercury porosimetry, a technique which is wide-spread in the pap…
This paper presents an advanced finite-element model for analyzing the dynamic behavior of electromechanical devices. The numerical approach includes nonlinear supply circuits, eddy-current and hysteresis effects, and mechanical quantities. The motion of the armature can be handled by means of two alternative approach…
The synthesis of structurally well defined poly(ε-caprolactone) (PCL)–silica nanocomposites was performed following two synthetic routes:( 1) “graft from” anionic ring opening polymerization of CL initiated from the surface of silica nanoparticles that have been previously modified by grafting of hydroxyl groups, and…
We study the transmission properties of a nonlinear periodic structure containing alternating slabs of a nonlinear right-handed material and a linear left-handed material. We find that the transmission associated with the zero-averaged refractive-index gap exhibits a bistable characteristic that is relatively insensit…
The objective of this study was to evaluate the capacity of three clinically useful tissue sources: tricuspid valve leaflet (TVL), carotid artery (CA), and jugular vein (JV), to generate myofibroblasts for potential use in a tissue-engineered cardiac valve replacement. Tissue biopsies of clinically appropriate sizes o…
The Ti K-edge EXAFS for PbTiO 3 measured in the temperature range including the critical temperature (763 K) due to the phase transition from tetragonal to cubic phase is discussed from the local point of view. Three kinds of atomic pairs, shorter Ti-O(1), medium Ti-O(2) and longer Ti-O(3) were analyzed independently.…
Organic–inorganic materials in which the organic part is constituted of dendrimers possessing one phosphorus atom at each branching point are reviewed. These dendrimers are either inside the materials and contribute to their elaboration, or they are linked to the surface of inorganic materials by covalent or electrost…
Langmuir monolayers (LM) and Langmuir-Blodgett (LB) films of pure lipophilic meso-tetra(4-dodecylaminosulfophenyl)porphyrin (PC12) and mixed with the anionic surfactant sodium hexadecylsulfate (SHS) were studied. The molecular packing and structure of PC12 and PC12-4SHS with variable surface pressure were investigated…
The size of nanometric carbonaceous particles produced in various combustion systems is determined by means of time resolved fluorescence polarization anisotropy (TRFPA). We also compare the performances of two different experimental implementations of thetechnique, which are complementary in terms of cost, simplicity…
Carbon deposition at Ni/ yttria-stabilized zirconia (YSZ) anodes with and without modification (with loading of 4.6 wt % in the anode) was investigated in methane with 3% and 10% The electrochemical performance of the Ni/YSZ anode in methane with 3% deteriorated sharply under open-circuit voltage (OCV) conditions, and…
Aragonite was grown epitaxially under calcite-stable conditions by using carbonate free single-crystal substrates with a threefold axis oriented normal to the surface.
The electrochemical behavior of zinc metal in a strong alkaline ( KOH) solution in the presence of , dicarboxylic acid modified poly(ethylene glycol) (PEG) was studied. Electrochemical methods (linear polarizations and potentiodynamic and potentiostatic techniques), spectroscopic (Fourier transform IR), morphological…