Materials Literature
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Abstract The minimal primary X‐ray beam size of a Quantum 2000 scanning X‐ray microprobe is in the order of 10 µm. This value is obtained by measuring the distance required for a 20–80% signal increase when scanning over a material edge. But for a more precise determination of the quantitative lateral resolution of th…
Scaffolds of biopolyester poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (PHBHHx) with uniaxial microtubular structure were successfully prepared by directional freezing and phase-separation techniques. These special structures guided the rabbit aorta smooth muscle cells (RaSMCs) to grow along the tubular structure. Th…
ADVERTISEMENT RETURN TO ISSUEPREVAddition/CorrectionORIGINAL ARTICLEThis notice is a correction“One-into-Many” Model: An Approach on DFT Based Reactivity Descriptor to Predict the Regioselectivity of Large SystemsSoumen Saha and Ram Kinkar RoyCite this: J. Phys. Chem. B 2008, 112, 6, 1884Publication Date (Web):January…
Polyoxometalates or POMs, a class of inorganic transition metal-oxide based clusters, have gained significant interest owing to their catalytic, magnetic, and material science applications. All such applications require high surface area POM based materials. However, chemically synthesized POMs are still at most in th…
The formation of porous polymer films via a simple in situ sphere–concave inversion of 2D polymer sphere arrays (see figure) is described. The straightforward technique presented here can be used for a variety of polymers by using appropriate monomers. The formed porous structures have the potential to function as mat…
Graphitic carbon nanofibers are catalytically grown on commercial carbon felt microfibers, and carbothermal treatment then produces interfacial silicon carbide phase rendering the supported nanofibers mechanically robust and chemically stable. This pliable 3-dimensional porous nanocomposite material reveals a hierarch…
Potato amylopectin with phosphate groups was immobilized on a quartz crystal microbalance with dissipation monitoring (QCMD) using the attractive interaction between opposite charges, and enzymatic starch hydrolysis was monitored directly. Poly( L-lysine) (PLL) proved to be an appropriate cationic linker between the Q…
Relativistic density functional theory has been applied to the uranyl(VI) and uranyl(V) complexes of unsubstituted (1) and dodeca-alkyl-substituted (2) isoamethyrin (hexaphyrin(1.0.1.0.0.0)). The experimentally observed bent conformation in the uranyl(VI) complex of 2 (Sessler, J. L. et al. Angew. Chem., Int. Ed. 2001…
Sulfate attack is a key factor that results in the deterioration of concrete. In the current paper, a novel method to improve the sulfate resistance of concrete by surface treatment with super-absorbent resin (SAR) synthesised in situ is presented. The precursor solution of poly(acrylic acid-co-acrylamide) is soaked i…
Orotidine monophosphate decarboxylase (ODCase) generally accepts pyrimidine-based mononucleotides as ligands, but other nucleotides are also known to bind to this enzyme. We investigated the kinetic properties of eight common and endogenous nucleotides with ODCases from three species: Methanobacterium thermoautotrophi…
Abstract XPS and SIMS were used for characterizing the surface oxide layers formed on FeAl alloys during annealing under atmospheres with different partial pressures of oxygen, which were controlled by H 2 O/H 2 ratios in the gas. The XPS results showed that an aluminum oxide (Al 2 O 3 ) layer was formed on the surfa…
Terpolyester poly(3-hydroxybutyrate-co-3-hydroxyvalerate-co-3-hydroxyhexanoate) (PHBVHHx) containing 5.3 mol % 3-hydroxyvalerate (3-HV) and 10.2 mol % 3-hydroxyhexanoate was obtained via microbial synthesis using recombinant Aeromonas hydrophila. For the first time in vitro biocompatibility of the terpolyester was eva…
By adjusting the basicity of the reaction mixture in the cationic surfactant templating route, a systematic change from 2D-hexagonal chiral to 2D-rectangular p2gg to a lamellar silica mesostructure is precisely controlled. Detailed characterization shows that the novel 2D-rectangular p2gg silica mesoporous crystal exh…
This study evaluated the precision of fit of implant frameworks cast in titanium (cp Ti) and palladium-silver alloy (Pd-Ag), made by the one-piece cast and laser welding techniques. From a metal matrix with five implants, 20 master casts were obtained, to which replicas of implants were incorporated. On these masters…
Mathematical models for the crystallisation process in pellet reactors have been developed during recent decades. In this paper, these models are extended with new insights in the pellet softening process. The diffusion of the supersaturated water to the pellet surface is included in the model and the fluidisation mod…
Enantiomerically pure, vicinal diols 1 afforded in a two-step synthesis (etherification and subsequent Claisen condensation) chiral bis-1,3-diketones H(2)L((S,S)) (3 a-c) with different substitution patterns. Reaction of these C(2)-symmetric ligands with various transition-metal acetates in the presence of alkali ions…
In this investigation, the effect of Zr substitution at the Ti site of the CaCu 3 Ti 4 O 12 on the electrical properties has been studied. Samples with composition x = 0.00, 0.10 and 0.30 have been synthesized by the solid state ceramic route in the system CaCu 3 Ti 4− x Zr x O 12 . Powder x-ray diffraction data showe…
A resorbable copolymer of glycolide and L-lactide (PGLA), a terpolymer of glycolide, L-lactide, and epsilon-caprolactone (PGLCL), and a copolymer of glycolide and epsilon-caprolactone (PGCL) were synthesized by ring opening polymerization using zirconium acetylacetonate (Zr(acac)(4)) as an initiator. The structure and…
Proteolytic activity of the Cu(II) complex of 1-oxa-4,7,10-triazacyclododecane (oxacyclen) was compared with that of the Cu(II) complex of 1,4,7,10-tetraazacyclododecane by using albumin, gamma-globulin, and myoglobin as substrates. Values of kcat/Km were greater for Cu(II)oxacyclen by 40-80 times. The enhanced activi…
Magnetostructural transition, which occurs at $77\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ $(89\phantom{\rule{0.3em}{0ex}}\mathrm{K})$ in the heat-treated (as cast) ${\mathrm{Gd}}_{5}{\mathrm{Si}}_{0.5}{\mathrm{Ge}}_{3.5}$, has been examined both experimentally, by magnetic and x-ray powder diffraction measurements, and…