Materials Literature
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A coherent picture of localization in one-dimensional aperiodically ordered systems is still missing. We show the presence of purely singular continuous spectrum for a discrete system whose modulation sequence has a correlation measure which is absolutely continuous, such as for a random sequence. The system showing t…
Bubble and foam stability, which are essential for the hallmark of champagne, rely on the concentration of amphiphilic macromolecules originating from the grape, which form molecular layers at the interface between champagne and gas. Ellipsometry and Brewster angle microscopy experiments were conducted at the air-cham…
Polycrystalline LuVO 3 perovskite has been studied by neutron powder diffraction (NPD), specific heat, and magnetization measurements. Below T N ≈ 107 K, LuVO 3 undergoes magnetic ordering according to a canted antiferromagnetic structure. Neutron diffraction data show that the magnetic structure is characterized by t…
The synthesis of an ionic quaterrylenebis(dicarboximide) 1a, a long-wavelength absorbing mesogen, is described. When compared with its analogue 2a, an ionic perylenebis(dicarboximide), the aromatic protons of 1a exchange with deuterium of concentrated D(2)SO(4) at a dramatically faster rate. In addition, stronger aggr…
Phase-contrast X-ray diffraction imaging and high-angular-resolution diffraction combined with phase-contrast radiographic imaging were employed to characterize defects and perfection of a uniformly grown tetragonal lysozyme crystal in the symmetric Laue case. The full-width at half-maximum (FWHM) of a 4 4 0 rocking c…
Abstract Summary: Laser‐induced fluorescence spectroscopy of the optical probe Nile Blue A in polymer clay nanocomposites is described. Concentration quenching of the fluorescence dominates the probe behavior until the clay platelets are physically separated by polymer intercalation. Further separation into an exfolia…
Computer simulations were used to study the interplay of the diffusion asymmetry (composition dependence of diffusion coefficient) and the phase-separation tendency (chemical effect) in the kinetics of the interface shift during dissolution in a binary system with restricted solubility. We have found that---on nanosca…
This paper presents the results of an investigation on a new electrical performance of rtv epoxy resin insulation material in tropical climate. The specimens of epoxy resin insulating materials are based on diglysidyl ether of bisphenol A (dgeba), metaphenylene-diamine (mpda) as curing agent and 325-mesh silica filler…
Reducing volatile organic compound (VOC) emissions from crude oil/gasoline distribution and storage facilities is important in controlling environmental pollution and enhancing workplace safety. Stable aqueous foam formulations are developed to provide a mass transfer barrier to the emission of VOCs during loading of…
A novel temperature-difference method was applied to produce CuBr crystals by using ethylene glycol as solvent and KBr as mineralizer; the temperature of the growth zone and the dissolution zone are 150 °C and 110 °C, respectively. The process was performed at ambient pressure. Clear, triangular, millimeter-scaled CuB…
Clay minerals are silicates that, due to their unique characteristics (layer or fibrous structures, ion exchange capacity, variability in chemical composition and in electrical charge of particles, etc.), present special physicochemical behaviors that determine their surface properties and, therefore, their interactio…
Silicates occur in a great number of minerals and rocks as well as in numerous technical products. Materials containing silicates constitute the basis of many different branches of industry. Apart from their principal applications in the construction, glass, and ceramic industries, siliceous materials have achieved an…
Abstract The linear rheological properties of high‐density polyethylene (HDPE), polystyrene (PS), and HDPE/PS (80/20) blends were used to characterize their structural development during extrusion in the presence of ultrasonic oscillations. The master curves of the storage shear modulus ( G ′) and loss shear modulus (…
Abstract In this study, the solvent adsorption phenomena of poly(vinyl alcohol) (PVA) in cosolvent mixtures of dimethylsulfoxide (DMSO; solvent 1) and water (solvent 2) were investigated. Typically, this cosolvent mixture could form hydrogen‐bonded DMSO/(water) 2 complexes, involving one DMSO and two water molecules.…
The structure of the 115 amino-acid residue protein DsvC was determined based on the anomalous scattering provided by the five S atoms present in the structure. By collecting the diffraction data at a wavelength of 1.9 A, the anomalous signal provided by the S atoms was enhanced. However, significant radiation damage…
In La-substituted ${\mathrm{Pb}}_{1\ensuremath{-}x}{\mathrm{La}}_{x}({\mathrm{Zr}}_{0.95}{\mathrm{Ti}}_{0.05}){\mathrm{O}}_{3},$ an increase in the La content $x$ served to convert the ferroelectric incommensurate (FI) phase into the antiferroelectric incommensurate (AI) phase around $x=0.01.$ In order to elucidate th…
A bigraft, composed of a 30-microm internodal distance expanded polytetrafluoroethylene (ePTFE) arterial graft segment and a preclotted polyethylene terephthalate arterial graft segment, was used to study the healing process of two different materials in the same dog. Healing was followed by FTIR-ATR spectroscopy and…
Eleven W-based catalyst systems for alkene epoxidation with aqueous H 2 O 2 were compared under identical conditions and at equal level of 0.1 mol % W-atoms. Of these, those based on a combination of H 2 WO 4 and a methyltrioctylammonium phase transfer catalyst turned out to be most active in particular systems that c…
Abstract Polypropylene's fire‐retardant properties can be improved by using modified kaolin. Modification was done by reaction of kaolin with a prepared resin–iron chelate. Polypropylene samples were loaded with different amounts of kaolin, modified kaolin, and their mixture. Ignition properties of the produced sample…
In this paper, the detection of crystalline elements in protein crystallization droplets containing precipitate is illustrated using the rotating-polarizer microscope technique. The sensitivity of this automated birefringence technique enables the detection of microcrystals in a precipitate that appears to be amorphou…