Materials Literature
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Abstract Catalytic oxidation of tartronic acid (TA) in water over a BiPt/C catalyst generates ketomalonic acid (KM) which polymerizes via ketone‐carbonyl to form the corresponding polyether, poly(ketomalonate) (PKM), preventing the competitive formation of KM‐hydrate available as reagent. Formation of the polyether (I…
A study of the effect of solute/solvent interactions on static and dynamic molecular hyperpolarizabilities (β and γ) of series of prototypical π-conjugated donor−acceptor chromophores is presented. The solvent effect was included via a recently proposed discrete quantum-mechanical Langevin dipoles/Monte Carlo method.…
Treatment of the mono-meso-substituted iron(II) octaethylporphyrin complexes, (py)2Fe(II)(meso-NO2-OEP), (py)2Fe(II)(meso-CN-OEP), (py)2Fe(II)(meso-HC(O)-OEP), (py)2Fe(II)(meso-Cl-OEP), (py)2Fe(II)(meso-OMe-OEP), (py)2Fe(II)(meso-Ph-OEP), and (py)2Fe(II)(meso-n-Bu-OEP), with hydrogen peroxide in pyridine-d5 at -30 deg…
The sintering behavior and surface microstructure of PbNi 1/3 Nb 2/3 O 3 –PbTiO 3 –PbZrO 3 (PNiNb‐PT‐PZ) ceramics were investigated. The PNiNb‐PT‐PZ ceramics with the stoichiometric composition and the addition of excess lead oxide (PbO‐rich ceramics) were sintered by liquid‐phase sintering in accordance with the solu…
A nanocomposite of dodecanethiol-passivated gold clusters and a silica aerogel has been synthesized. The gold particles were efficiently absorbed in a silica wet gel and the particles were not flushed out during sc-CO2 drying. This can lead to a very simple and efficient way to the production of devices with high nonl…
Cold-working of metallic materials up to large strains is usually characterised by simultaneous substructure evolution on different length scales and accompanied by the formation of significant lattice rotations. A promising tool for the description of such microstructure development is the concept of partial disclina…
A partially methylated highly branched polysilazane Si4N4CH9 is the first single-source precursor for stoichiometric Si3N4/SiC. Thermolysis delivers amorphous Si4N4C and H2 as the only gaseous by-product. Upon stepwise heating to 1900 °C, Si4N4C gradually crystallizes in the order α-Si3N4, β-SiC, and finally β-Si3N4,…
A reversible change in the [001] surface structure of ${\mathrm{LaAlO}}_{3}$ has been studied using x-ray truncation rod analysis. Crystal truncation rod profiles in the $00L,$ $10L,$ and $20L$ directions have been recorded on [001]-oriented single crystals at both room temperature and approximately 670 K under UHV co…
The authors propose an approach to constructing three-dimensional tissue with capillaries using cellulose hollow fibers. Fibronectin (FN) was immobilized on hollow fibers to assure cell attachment. Bovine coronary artery smooth muscle cells (BCASMC) and L cells were seeded on FN-immobilized fibers and cultured for an…
ABSTRACT: Several proteins, lipids and waxes were tested as edible coatings on sweet corn. Only zein, a natural constituent of corn, gave a continuous adhesive and stable coating with satisfactory sensory properties. After 8 days at 10 °C, the population of L. monocytogenes was 10‐fold lower on coated sweet corn than…
Infrared and far infrared transmission spectra have been measured for the ferromagnetic Ga 1- x Mn x As ( x =0.034 and x =0.050) between 10 and 12000 cm -1 . A broad peak is observed around 1600 cm -1 , and this energy is close to the deep acceptor level of Mn impurity in GaAs. A finite featureless absorption, spreadi…
The role that alkyl chain packing density in a self-assembled monolayer (SAM) plays in the adsorption of protein to the SAM surface was investigated using in situ neutron reflectivity (NR) and total internal reflection fluorescence (TIRF) measurements of the adsorption behavior of human serum albumin (HSA) and human i…
A method is proposed for the local atomic distribution function analysis of amorphous materials. This method is based on local halo-electron diffraction intensity analysis with nano-sized electron probes as small as 25 to approximately 3 nm, taking advantage of the intensity recording with imaging plate. Nanodiffracti…
Abstract Clay-Polyacrylate hybrid material was prepared from Montmorillonite (M) clay and polytrimethylol propane triacrylate (PA) using intercalation polymerization process. Characterization of the composite was done by x-ray diffraction (XRD), infrared (IR) spectroscopy, scanning electron microscopy (SEM) and energy…
An approach for determining nonlinear optical properties within a quantum mechanics/molecular mechanics method is presented. The response equations in the multiconfigurational self-consistent-field/molecular mechanics approach that includes polarization effects are derived and implemented for second order in response…
Pyrochlore free 0.9Pb(Mg1/3Nb2/3)O3–0.1PbTiO3 thin films were prepared from alkoxide-based solution precursors. Preferential (111) crystallographic orientation was obtained on TiO2/Pt/TiO2/SiO2/Si substrates by spin coating. Dielectric, electrostrictive, and piezoelectric properties of the films were characterized in…
Total energy calculations have been performed within the periodic density-functional theory framework to study the dissociation of molecularly adsorbed nitrogen monoxide NO over three different catalytic surfaces: palladium, rhodium, and palladium-manganese (100). The potential energy surfaces for NO dissociation on t…
Mesoporous organosilicas based on a bridged organosilicate have been synthesized using a triblock PEO−PLGA−PEO copolymer containing a more hydrophobic poly(dl-lactic acid-co-glycolic acid) block and the structural difference between mesoporous organosilicas prepared from PEO−PLGA−PEO and PEO−PPO−PEO block templates is…
Onconase is an amphibian protein that is now in Phase III clinical trials as a cancer chemotherapeutic. Human pancreatic ribonuclease (RNase 1) is homologous to Onconase but is not cytotoxic. Here, ERDD RNase 1, which is the L86E/N88R/G89D/R91D variant of RNase 1, is shown to have conformational stability and ribonucl…
A new copper carboxylate polymer with cyanoacetate anion as a ligand was synthesized and studied using X-ray diffraction, IR, and EPR spectroscopy. The crystal is tetragonal: a = 14.702(2) Å, c = 13.470(3) Å, Z = 8, space group I 4 1 / a , and R = 0.0634. The copper atoms in the centrosymmetric dimeric fragment have a…