Materials Literature
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We aimed at preparing magnetic iron oxide particles by the oxidation-precipitation method in order to encapsulate these particles in polymer matrices composed of poly(acrylamide-styrene sulfonic acid sodium salt). Nanocomposites were synthesized by the incorporation of surface treated magnetic nanoparticles in the syn…
Unprecedented: Atypical of Prussian blue structured materials, MnII and [NEt4]CN react to form [NEt4]2Mn3(CN)8 possessing layers of octahedral [MnII(CN)6]4− bonded to two high-spin tetrahedral MnII sites (see structure; yellow and red Mn, black C, blue N).
A series of multi-block copolymers, poly(L-lactide)-b-poly (ϵ-caprolactone) (PLLA-b-PCL) were synthesized. The first step of the synthesis consisted of the transesterification between the PLLA and 1,4-Butanediol, followed by the copolymerization of PLLA-diols and PCL, using isophorone diisocyanate (IPDI) as a coupling…
This paper presents an experimental investigation and modeling solutions of an electric arc furnace (EAF) with 100-t capacity used for steel melting in order to evaluate the best option for improvement. Experimental results show that EAFs represent a substantial source of electric disturbances such as voltage fluctuat…
The effect is reported of surface anchoring on various electro-optical parameters of a pure ferroelectric liquid crystal (FLC) and five mixtures with different concentrations of dye. The Anthraquinone D5 dye was used as guest entity, whereas Felix 17-000 was used as host in this investigation. The presence of dye mole…
The crystal structure of the Bacteroides thetaiotaomicron protein BT_3984 was determined to a resolution of 1.7 Å and was the first structure to be determined from the extensive SusD family of polysaccharide-binding proteins. SusD is an essential component of the sus operon that defines the paradigm for glycan utiliza…
Reverse Monte Carlo refinements with combined input from neutron/x-ray total scattering and extended x-ray absorption fine structure (EXAFS) were applied to analyze local atomic displacements in perovskite-related AgNbO(3). This compound exhibits complex displacive order-disorder behavior that determines the unique di…
We investigate the structures of H(3)Co(CN)(6) and D(3)Co(CN)(6) and their temperature dependence using a combination of advanced neutron and x-ray diffraction techniques. Lattice parameter refinements show marked temperature- and isotope-dependent effects in the thermal expansion behaviour. Reverse Monte Carlo modell…
We report on the anisotropic electrohydrodynamic states formed over a wide temperature range $(\ensuremath{\sim}45\text{ }\ifmmode^\circ\else\textdegree\fi{}\text{C})$ in a planarly aligned bent-core nematic liquid crystal driven by fields of frequency in the range 0.1 Hz--1 MHz. Three different primary bifurcation sc…
Abstract While melt‐spinning biodegradable poly‐( L / D )LA 96/4 lactides into fibers, we intentionally induced monomer into the material by thermal degradation. Elevated temperatures and variable residence times were used during processing. By increasing the residence time, the molecular weight decreased, and the amo…
(Ge(0.2)Se(0.8))(100-x)In(x) and (Ge(0.17)Se(0.83))(100-x)In(x) (x = 0, 5, 10, 15 at.%) chalcogenide glasses have been studied with high-energy x-ray diffraction, neutron diffraction and extended x-ray absorption spectroscopy at Ge, Se and In K-edges. The experimental data were modelled simultaneously with the reverse…
Abstract The twin‐screw configuration problem (TSCP) involves defining the location of a set of predefined screw elements of a corotating twin‐screw extruder configuration to optimize different, often conflicting, objectives. A multiobjective optimization methodology based on Evolutionary Algorithms was developed and…
Abstract Ag has been shown to be a good metal for SOFC anode cermets using CO fuel. Here we have expanded on the work reported by testing Ag‐YSZ cermets against different hydrocarbon based fuel (H 2 and CH 4 ). This study shows that while Ag is a good current collector, it alone does not have the required catalytic ac…
In this contribution, a synthetic procedure to obtain hybrid nanostructured material from biopolymer chitosan and spinel-metal-oxide nanoparticles is described. The spinel-metal-oxide MFe 2 O 4 (M = Mn or Mg) magnetic nanoparticles were synthesized from polymeric solid solution of cations chelated within biopolymer ch…
The LI818 proteins and their Lhcx homologs in diatoms are a subgroup of the light-harvesting (LHC) antenna family, suspected of being involved in photoprotection and stress resistance. In this work, we report that the transcription of three LI818–like genes in Thalassiosira pseudonana Hasle et Heimdal (Lhcx1, Lhcx5, a…
Abstract Poly(acrylic acid) (PAA) was dissolved in water, and the solution was irradiated with high‐energy electrons. The formation of macroscopic gel was studied as a function of the radiation dose, the pH of the aqueous solution, and the concentration of added salt. Gelation by intermolecular crosslinking was found…
The structures of two polymorphs of [MnTClPP][TCNE] have been determined by Rietveld refinement of the X-ray powder diffraction method. Samples were prepared by thermolysis of the toluene and CH 2 Cl 2 solvates, [MnTClPP][TCNE]·2Sol (Sol = PhMe, CH 2 Cl 2 ). The desolvated structures are similar to their solvates, con…
One of the challenges facing superparamagnetic iron oxide (SPIO) nanoparticles is to improve their biological compatibility. While highly uniform SPIOs can be manufactured, the surfaces are hydrophobic as a result of the surfactants used in their fabrication. In this study, we developed a general strategy to fabricate…
Abstract Present work gave a new method for preparing polymethyl(3,3,3‐trifluoropropyl)siloxane (PMTFPS) in the mixing chamber of a torque rheometer using sodium silanolate as initiator, and ethyl acetate (EA) and dimethyl sulfoxide (DMSO) as promoters. The promoting effect of EA in the anionic bulk polymerization of…
Abstract In order to clarify the chemical adsorption properties of alkoxysilyl compounds to metal‐oxide surface quantitatively and to obtain the information on the reaction conditions for the efficient surface modification, the chemical surface modifications of nano‐porous alumina membranes (NPAMs) by typical alkoxysi…