Materials Literature
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We numerically study the vibrations of jammed packings of particles interacting with finite-range, repulsive potentials at zero temperature. As the packing fraction $\ensuremath{\phi}$ is lowered towards the onset of unjamming at ${\ensuremath{\phi}}_{c}$, the density of vibrational states approaches a nonzero value i…
This paper reviews the extended Cauchy model and the four-parameter model for describing the wavelength and temperature effects of liquid crystal (LC) refractive indices. The refractive indices of nine commercial LCs, MLC-9200-000, MLC-9200-100, MLC-6608, MLC-6241-000, 5PCH, 5CB, TL-216, E7, and E44 are measured by th…
Density functional theory calculations have been performed to study the dissolution and migration of helium in $\ensuremath{\alpha}$-iron, and the stability of small helium-vacancy clusters ${\mathrm{He}}_{n}{V}_{m}$ ($n$,$m=0$ to 4). Substitutional and interstitial configurations of helium are found to have similar s…
accumulation is very time-consuming when using full matrix leastsquare for larger problems.
Comparing the year ends of the last three triennia, 11728 journal pages were published in 2004, compared with 9215 in 2001 and 7937 in 1998. This increase in the number of pages has been accompanied by a major reduction in publication times for all sections of Acta Cryst., J. Appl. Cryst. and J. Synchrotron Rad. In th…
With the advent of the Structural Genomics initiatives, we have seen a host of new technologies emerge for automation of the tedious crystallization process. The latest robots and nanodispensers allow us to perform a larger number of crystallization screens faster with significantly less quantities of protein. There i…
Microstructure of metals (Cu, Fe, Mg, Cu with Al 2 O 3 ) obtained by high-pressure torsion and its evolution with post annealing was studied by conventional powder diffraction in symmetric Bragg-Brentano geometry. This included evaluation of lattice parameters and texture but mainly line profile analysis in terms of b…
I. INTRODUCTION Liquid detergents make a major contribution to the overall detergent and cleaners market, due in part to their handling characteristics and their ease of use. However, in numerous cases, the formulations would lack either consumer appeal or essential physical properties if they did not include additive…
The RCSB validates PDB data while considering the evolving nature of data and nomenclature standards. In order to provide the community with high quality data, the RCSB Protein Data Bank (www.pdb.org) has developed a number of tools that support the deposition and processing of X-ray and NMR structures and that are ba…
Abstract For Abstract see ChemInform Abstract in Full Text.
We have prepared sodium tellurite glasses doped with europium. Emission intensity of the europium-doped glass is at least 500× more than that of the undoped glass. Fluorescence features exhibited dependence on the pump laser wavelength. Persistent spectral hole burning was observed in the F07→D05 transition of Eu3+. M…
In the vicinity of their resonance frequency, piezoelectric resonators are highly sensitive to small perturbations. The present report is focused on the magnetic field as a perturbation source. Magnetocapacitance modulation of more than 5% is achieved at room temperature on both ferroelectric single crystals and quart…
Abstract For Abstract see ChemInform Abstract in Full Text.
Polymer blends are capable of providing materials which extend the useful properties beyond the range that can be obtained from single polymer equivalents. Blends of Acrylonitrile-Butadiene- Styrene (ABS) and Polycarbonate (PC) were prepared in different ratios by melt blending technique which was carried out using a…
Abstract The development of reliable and reproducible chemistries for the immobilization of biomolecules to a conducting polymer is a key challenge in the design and preparation of a CP‐based biosensor. In this article, the syntheses and electropolymerization of a series of new 3‐alkylthiophene derivatives functionali…
Abstract Binary melt blends of two thermoplastics—poly(trimethylene terephthalate) (PTT) and polyamide‐12 (PA12)—having a large difference in zero‐shear viscosity values, were prepared in different blending ratios (PTT/PA12 90/10, 75/25, 25/75, 10/90) by means of a twin‐screw extruder. Scanning electron microscopy (SE…
Abstract A further study on mechanical properties and morphology evolution of high density poly (ethylene)/ethylene‐vinyl acetate/and organically‐modified montmorillonite (HDPE/EVA/OMT) nanocomposites exposed to gamma‐rays (0–200 kGy) has been achieved. The results showed that nanocomposites have superior irradiation‐…
Studies of Mg2Cu6Ga5 reveal that this compound contains incomplete Bergman clusters in its structure and shows a pseudogap and empty bonding states just above the Fermi energy according to band calculations. Under a rigid band assumption, such a compound may be tuned to approximant and quasicrystal phases in which the…
Abstract Cationic polyelectrolytes with pyridinium and 1,2‐dimethylimidazolium functionalities based on a hyperbranched polyglycerol scaffold with a narrow polydispersity were prepared by a polymer analogous reaction in a one‐pot synthesis. By the variation of the spacer lengths between the cationic functionalities an…
The mono/bifunctional and metallo/non-metallo properties of Bacillus subtilis DAHPS (3-deoxy-D-arabino-heptulosonate 7-phosphate synthase) have been controversial for several decades. The present study investigated the DAHPSs from both the B. subtilis parent Marburg strain and the derivative strain 168 in detail and c…