Materials Literature
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Twenty‐five years of diesel particulate filter (DPF) developments have shown that high‐volume ceramic materials are well suited for the harsh requirements of exhaust after treatment. Nevertheless, problems regarding filter reliability and durability associated with the regeneration of the filter have limited their ser…
Pumpellyite-(Al), ideally Ca2(Al,Fe2+,Mg)Al2(SiO4)(Si2O7)(OH,O)2·H2O, is a newly approved mineral species from Bertrix, Ardennes mountains, Belgium. It occurs as radiating fibrous aggregates reaching 5 mm in diameter, constituted by acicular crystals associated with calcite, K-feldspar and chlorite. Pumpellyite-(Al) i…
Abstract Linear and branched hydrophilic additives of various molecular weights (MWs) were extruded with polypropylene (PP) to make blend films. The surface‐modifying additives included polyethylene glycol (PEG), hydroxyl‐terminated four‐arm polyethylene oxide (PEO), and a commercial hydrophilic additive, Irgasurf HL5…
Abstract Acrylonitrile–butadiene–styrene (ABS) polymers are susceptible to degradation that increases the yellowness of the polymer, distorts the surface glossy, and affects the mechanical properties. One way to protect ABS against degradation is the addition of carbon black (CB) that can act as a stabilizer. In this…
A “C‐sphere” specimen geometry was conceived and developed to measure failure stress of bearing‐grade silicon nitride (Si 3 N 4 ) balls caused by tension at the ball's surface. The induced method of fracture also allows for the study of surface‐located strength‐limiting flaws in ceramic spheres. A slot is machined int…
Abstract Natural rubber latex was added to composite materials formulated from a quebracho tannin adhesive crosslinked with hexamethylenetetramine and wood flour as a reinforcing filler. The final microstructure of the thermoset modified by the addition of different concentrations of latex was observed by scanning ele…
The repeating unit of the glycan chain in the S-layer of the bacterium Aneurinibacillus thermoaerophilus L420-91(T) is composed of four alpha-d-rhamnose molecules and two 3-acetamido-3,6-dideoxy-alpha-d-galactose moieties (abbreviated as Fucp3NAc). Formation of the glycan layer requires nucleotide-activated sugars as…
Microstrip lines periodically loaded with broad-side coupled spiral resonators (BC-SRs) are designed, fabricated and characterised for the first time. These structures inhibit signal propagation in the vicinity of the resonance frequency of the spirals, fo. This stopband behaviour is due to magnetic coupling between t…
Two new multi-manganese-substituted polyoxotungstates K3Na10H3[{MnII(H2O)}2MnIII4(SiW6O26)(SiW9O34)2]·26H2O 1 and K5Na3[MnIII4(H2O)2(GeW9O34)2]·18H2O 2 have been successfully synthesized by the reaction of [β-XW11O36]8– (X = Si, Ge) with MnCl2 in the presence of potassium persulfate. Compound 1 consisted of two [B-α-S…
The synthesis of various tetrahydrobenzo[b]pyran derivatives has been carried out by means of an uncatalyzed, three-component, one-pot clean condensation of aromatic aldehydes, reactive methylene compounds, and dimidone in aqueous medium. Simple workup, and mild and neutral conditions that give quantitative yields of…
Abstract Novel aromatic poly(amide imide)s ( m ‐PAIs, m = 8, 12, 16) containing preformed isophthalamide unit and pendent n ‐alkyloxy (‐O‐ n ‐C m H 2 m +1 , m = 8, 12, 16) side chains were prepared in thin films by polymerization of pyromellitic dianhydride (PMDA) with N,N ′‐bis(4‐aminophenyl)‐5‐( n ‐alkyloxy)isophtha…
Abstract Viscoelastic properties of chitosan (CH), chitosan‐poly(ethylene glycol) 400 (CH‐PEG), and chitosan‐poly(ethylene glycol) 400 with glyoxal as crosslinking agent (CH‐PEG‐Gly) systems were studied to analyze the effect of chitosan concentration (from 0.83 to 1.67%). Dynamic moduli increase as chitosan concentra…
By combining, on the same freestanding single-walled carbon nanotubes, electron diffraction and Raman experiments, we were able to obtain the resonance energy of unambiguously $(n,m)$-identified single-walled carbon nanotubes. We focus on the analysis of the first optical transition of metallic tubes $({E}_{11}^{M})$…
Abstract The goal was to electrospin 2-hydroxyethyl methacrylate — based biocompatible polymers and prepare submicron fibres (nanofibers) for biomedicinal applications. Syntheses of poly(2-hydroxyethyl methacrylate) (HEMA) and its copolymer with 2-ethoxyethyl methacrylate (EOEMA), and their characterization by viscome…
High‐purity KTa 0.3 Nb 0.7 O 3 nanoparticles have been successfully synthesized by hydrothermal and solvothermal methods. The KOH concentration and the solvent composition have significant effects on the final products. The synthesis mechanism was discussed. X‐ray diffraction, scanning electron microscopy, and transmi…
D-3-phosphoglycerate dehydrogenase (EC 1.1.1.95) from Escherichia coli contains two Gly-Gly sequences that have been shown previously to have the characteristics of hinge regions. One of these, Gly(336)-Gly(337), is found in the loop between the substrate binding domain and the regulatory domain. Changing these glycin…
The lower pressure stability of glaucophane in the presence of quartz can be attributed to the reaction: glaucophane + 2 quartz = 2 albite + talc. Reaction reversals in the Na 2 O-MgO-Al 2 O 3 -SiO 2 -H 2 O system were obtained using a ½ inch diameter piston-cylinder press, synthetic talc, albite, glaucophane and natu…
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In this paper, the microwave‐assisted molten salt method (MAMSS) and molten salt method (MSS) were used to synthesize SrBi 4 Ti 4 O 15 (SBT). The phase constitution was determined by powder X‐ray diffraction and the microstructure of powder was examined by scanning electron microscopy. In contrast to the conventional…
Abstract Polymer‐dispersed liquid crystal (PDLC) films were prepared by the ultraviolet‐light‐induced polymerization of photopolymerizable monomers in nematic liquid crystal/monomer/chiral dopant composites, and the effect of the chiral dopant on the electro‐optical properties of the PDLC films was studied. It was dem…