Materials Literature
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We introduce the idea of an “equi-g(r) sequence.” This consists of a series of equilibrium many-body systems which have different number densities ρ but share, at a given temperature, the same form of pair correlation function, termed “target g(r).” Each system is defined by a pair potential indexed by ρ as in uρ(r).…
Two subfamilies of UDP-GlcNAc C6 dehydratases were recently identified. FlaA1, a short soluble protein that exhibits a typical SYK catalytic triad, characterizes one of these subfamilies, and WbpM, a large membrane protein that harbors an altered SMK triad that was not predicted to sustain activity, represents the oth…
Comparative mechanical tests of an Al-Cu-Fe quasicrystal and a tungsten (001) single crystal have been carried out using cyclic nanoindentation by a Berkovich indenter. The first loading-unloading cycle up to 30 mN formed the initial indent. On reloading of the indenter up to 50 mN, a transition from elastic to plasti…
Polyhydroxyalkanoates (PHA) and poly-beta-hydroxybutyrate (PHB) in particular have become compounds which is routinely investigated in wastewater research. The PHB analysis method has only recently been applied to activated sludge samples where PHA contents might be relatively low. This urges the need to investigate t…
The fast-activated anionic polymerization of ε-caprolactam has been performed in suspension in order not only to efficiently dissipate the heat of polymerization, but also to directly synthesize powdered polyamide 6. The continuous phase of the system is composed of polyisobutene oils: five fractions, different in the…
The syntheses of two AB 2 monomers, aminodicarboxylic acid ( 1 ) and aminodicarbonyl azide ( 2 ), and their model reactions for the one-pot synthesis of dendritic aromatic poly(urea-amide)s using the two AB 2 monomers were carried out. The model reaction of 2 and p -tolyl isocyanate produced the target urea with two a…
A solid‐state route to synthesize bismuth germanate (Bi 4 Ge 3 O 12 , or BGO) ceramics, and the optimum conditions for the laser sintering of these ceramics, were investigated. Special emphasis was placed on the influence of laser power and irradiation time on densification and microstructure evolution. The procedure…
A model for the interface between a concentrated and a very dilute polymer solution is studied by Monte Carlo simulations at temperatures below the Theta temperature (in bad solvent conditions). The wave-number–dependent interfacial tension γ( q ) is extracted from an analysis of the capillary wave amplitudes. It is s…
Abstract The present work represents an exploratory study of creep in a Ni-rich NiTi shape memory alloy (50.7 at.% Ni) in the temperature range 470–530°C at stresses betweef 90 and 150 MPa. Creep o...
The dose response of the 375 degrees C. 470 nm TL peak in fired quartz is studied by using thermoluminescence emission spectra and monochromatic glow curves. The blue emission displays a significant sensitivity increase for doses in excess of 1000 Gy, subsequent saturation at 16 kGy and a pre-dose effect over the enti…
The Chemla effect concerns the strong composition dependence of the internal ionic mobilities of cations in mixtures of two molten salts with a common anion, in which the mobility of the large cation can be higher than the small one at low concentrations of the latter. Molecular dynamics simulations of molten (Li,Cs)N…
Electromagnetic interference (EMI) shielding characteristics of ethylene vinyl acetate (EVA) and ethylene propylene diene (EPDM) and their 50: 50 blend filled with conductive carbon black and short carbon fibre (SCF) have been studied. The measurements of shielding effectiveness (SE) were carried out in two different…
[NBu4]2n[cis-Ru(H2−ndcpq)2(NCS)2] {n = 0 or 1; H2dcpq = 4-carboxy-2-[2′-(4′-carboxypyridyl)]quinoline} were newly synthesized, and their photophysical and photovoltaic properties were characterized and compared with those of [NBu4]2n[cis-Ru(H2−ndcbiq)2(NCS)2] (H2dcbiq = 4,4′-dicarboxy-2,2′-biquinoline) and [NBu4]2n[ci…
The effect of Si on the corrosion properties of Ca-modified weathering steel was evaluated with respect to the formation behavior of complex inclusions in the steel and the dissolution behavior of the inclusions in thin water film by pH measurement and electrochemical impedance spectroscopy (EIS). To understand the lo…
We have investigated the effect of Bi/sub 2/O/sub 3/ additive on the densification, low-temperature firing, and magnetic characteristics of modified Z-type Ba/sub 3/Co/sub 2/(1-x-y)Zn/sub 2x/Cu/sub 2y/Fe/sub 23.5/O/sub 41/ hexaferrite. Our results show that Bi/sub 2/O/sub 3/ additive not only improves the densificatio…
Ca 3−x Sr x Co 4 O 9 (x=0,0.5,1.0) samples were prepared by solid state reaction. As expected from the radii of Sr2+ and Ca2+, the cell parameters increase with Sr content x. Simultaneously, the resistivity and the carrier localization at low temperature are enhanced. The thermoelectric power is not sensitive to the S…
Liquid-crystalline compounds 1 and 3 having perfluoroalkyl-terminated mesogens at both ends of poly(ethylene oxide) chains have been prepared. These compounds show smectic A (SA) and C phases over 100 °C. The SA-Iso (isotropic) transition temperatures are higher by about 70 °C than those of the corresponding alkyl-sub…
Dew retted hackled long flax was treated with propyltrimethoxysilane, phenylisocyanate and maleic acid anhydride modified polypropylene (MAA-PP). The results of these treatments on fiber wetting and interfacial properties have already been reported in a previous article [Van de Velde, K. and Kiekens, P. (2001). J. The…
Lamellar single crystals of poly[(R)-3-hydroxybutyrate] (P(3HB)) with three types of molecular weights and four kinds of P(3HB) copolymers with different secondary monomer units were grown from dilute solutions of chloroform and ethanol under isothermal crystallization conditions. The surface morphologies of all the s…
Platinum and Palladium behave in an unexpected manner when cathodically polarised in the presence of electrolytes dissolved in carefully dried polar organic solvents, such as N,N-dimethylformamide. A reductive layer is formed on the metal the thickness of which depends on the amount of electricity consumed during the…