Materials Literature
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The lipid membrane has been shown to mediate the fibrillogenesis and toxicity of Alzheimer's disease (AD) amyloid-beta (Abeta) peptide. Electrostatic interactions between Abeta40 and the phospholipid headgroup have been found to control the association and insertion of monomeric Abeta into lipid monolayers, where Abet…
Our Fortran codes for hard sphere fluids and their mixtures for the correlation functions that arise from the Percus–Yevick theory and the Verlet–Weis semi-empirical correction have proven useful during a period of nearly four decades and continue to be useful. In order to make these codes even more widely available,…
The gas-phase continuous hydrogenation of p-chloronitrobenzene (p-CNB) over 1 mol% Au/TiO2 and Au/Al2O3 was compared for the first time. Both catalysts exhibit 100% selectivity in terms of -NO2 group reduction, resulting in the sole formation of p-chloroaniline (p-CAN). Au/TiO2 exhibited a narrower particle size (1-10…
Many sequence variations of the 8-17 RNA-cleaving deoxyribozyme have been isolated through in vitro selection. In an effort to understand how these sequence variations affect cleavage site selectivity, we systematically mutated the catalytic core of 8-17 and measured the cleavage activity of each mutant deoxyribozyme…
Telechelic polymers end-capped or copolymerized with the benzene-1,3,5-tricarboxamide (BTA) moiety lead to supramolecular materials. The intrinsic phase segregation of BTA nanorods with an amorphous polymer such as poly(ethylene butylene) results in thermoplastic elastomeric behavior.
Nanowall arrays of hydrous manganese dioxide MnO 2 ·0.5H 2 O were deposited on cathodic substrates by the potentiostatic method from a mixed aqueous solution of manganese acetate and sodium sulfate, and the Li + ions intercalation properties of such nanowall arrays were studied. The deposition was induced by a change…
The analysis of natural contact interfaces between protein subunits and between proteins has disclosed some general rules governing their association. We have applied these rules to produce a number of novel assemblies, demonstrating that a given protein can be engineered to form contacts at various points of its surf…
A comparison between the properties of chars produced by pyrolysis of rice husk and eucalyptus at different temperatures and heating rates has been performed. Low heating rate (LHR) devolatilization experiments were conducted in a fixed bed reactor at temperatures ranging from 600 to 900 °C, while a fluidized bed reac…
Three typical methanol−gasoline blends M10, M20, and M85 containing 10%, 20%, and 85% of methanol by volume, respectively, were used to investigate the effects of different methanol/gasoline ratios on engine power, thermal efficiency, and emissions, especially the exhaust methanol emission. A three-cylinder, port fuel…
Five low-index stoichiometric TiO2 rutile and anatase surfaces, i.e., rutile (110), (100), and (001) as well as anatase (101) and (100), have been investigated using different Hamiltonians with all-electron Gaussian basis sets, within a periodic approach. Full-relaxations of the aforementioned surfaces have been essen…
Using a novel hydrogen peroxide heating method, we synthesized milky white, water-soluble polyhydroxylated fullerenes (fullerenols) with 36-40 hydroxyl groups (estimated average) along with 8-9 secondary bound water molecules. The fullerenols exhibited high water solubility up to 58.9 mg/mL in a neutral (pH = 7) condi…
Novel CdS quantum dots (QDs) sensitized TiO 2 nanotube-array photoelectrodes were investigated for their photoelectrochemical (PEC) performance. The highly ordered TiO 2 nanotube arrays were synthesized by anodic oxidation and CdS QDs were deposited into the pores of the nanotube arrays by a sequential chemical bath d…
We point out that electromagnetic one-way edge modes analogous to quantum Hall edge states, originally predicted by Raghu and Haldane in 2D photonic crystals possessing Dirac point-derived band gaps, can appear in more general settings. We show that the TM modes in a gyromagnetic photonic crystal can be formally mappe…
Electronic properties of the π–d system β-(EDT-DSDTFVSDS) 2 FeBr 4 are investigated, where EDT-DSDTFVSDS = ethylenedithiodiselenadithiafulvalenothioquinone-1,3-diselenolemethide. Clear contrast between the FeBr 4 salt and the nonmagnetic anion analogue salt, β-(EDT-DSDTFVSDS) 2 GaBr 4 , was observed in the electrical…
[24]hexaphyrin(1.0.1.0.0.0) was electrochemically synthesized in good yield starting from a linear hexapyrrolic precursor. This straightforward approach provides an efficient "green" alternative to the reported chemical synthesis, which requires the use of trifluoroacetic acid as the solvent and toxic chromium(VI) sal…
The objective of this paper is to quantify the damage caused by a missile impacting aircraft structures, using computational simulations. A three-step approach was taken. The first step was to investigate the effects of a simple body-on-body impact on the aircraft's wing structure. The second step was to simulate the…
The gouging impact phenomenon which occurs at the Holloman Air Force Base High-Speed Test Track during hypervelocity impact testing is examined further. The material constitutive models for VascoMax 300 and 1080 steel are refined, and extended into the high-strain-rate regime, using results from flyer plate impact exp…
Abstract By controlling the reactant proportion, three sodium‐centered polynuclear octahedral copper(II)–amino acid clusters, [Na⊂{Cu6(Ala)8(H2O)(ClO4)}]·4ClO4·4H2O (1), Na[Na⊂{Cu6(Ala)8(ClO4)}]2·9ClO4·8H2O (2), and [Na⊂{Cu5(Ala)6(H2O)3}]n·5n(ClO4)·3n(H2O) (3) (Ala = L‐alanine), were synthesized. The structures were c…
The spectroscopic and photophysical properties of zeolite-Y-entrapped [Ru(bpy)3]2+ co-doped with either [Fe(bpy)3]2+ or [Fe(tpy)2]2+ over a range of iron complex loadings are presented. In solution, [Ru(bpy)3]2+ undergoes efficient bimolecular energy transfer to [Fe(bpy)3]2+, whereas only radiative or trivial energy t…
DOI: 10.2514/1.26011 The effective use of existing finite element codes in the direct simulation of hypervelocity impacts by projectiles is limited by the dependence of the size of localized failure regions on the mesh size and alignment. This gives rise to a nonphysical description of the penetration and perforation…