Materials Literature
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Extra-small microcrystals of a human kinase CK2alpha were obtained for the first time by the optimization of a recent protein crystallization method based on highly packed protein nanofilm template. Protein crystal induction and growth appear indeed optimal at high surface pressure of the film template yielding high p…
Thermal properties and solid-state structure of copolyesters based on smectic poly(diethylene glycol 4,4‘-bibenzoate) (PDEGBB) and non-liquid crystalline poly(diethylene glycol isophthalate) (PDEGI) were characterized previously. The present study examined the oxygen transport properties and free volume characteristic…
A large high-quality zeolite MFI single crystal 3.0 × 1.5 × 1.5 mm 3 in size was synthesized by means of a nutrition supplemental method and a p -nitroaniline (PNA)/MFI single crystal was prepared via physical vapor deposition. The light yellow PNA/MFI single crystal changed to green when irradiated by 1062 nm fundame…
Using DECODER (direction exchange with correlation for orientation distribution evaluation and reconstruction) NMR, we probe the orientations of carbonyl carbons in [1-(13)C]glycine-labeled dragline silk under conditions of varying strain and fiber draw rate. A model-specific reconstruction of the molecular orientatio…
[reaction: see text] Synthesis of a chiral, strapped, cyclic bis(benzimidazole) ligand is reported. This compound forms a stable, Jahn-Teller-distorted, octahedral Cu(II) complex in which the elongated axis is positioned within the main macrocycle. The C(2)-symmetric bis(benzimidazole) core adopts a highly ruffled con…
A series of aregic poly(ester amide)s ( ar -PEALM) with ester to amide groups ratios ( a: b ) ranging from 1:50 up to 1:2 were prepared from O -methyl- l -malic acid, 1,6-hexanediol, and 1,6-hexanediamine. The ester linkage was incorporated in the poly(ester amide) chain using 6-aminohexylpentachlorophenyl O -methyl-…
The development of tunable filters is a key point for the ability of optical telecommunication networks to comply with the continuous evolution of the service providers needs. Among the numerous technologies which can be used to achieve narrow bandpass filtering devices, we concentrate our analysis on Thin-Film Interf…
Metal island films show exceptional optical properties, which are interesting for linear and non-linear optics. One of the perspective applications of metal islands in optics utilizes the surface plasmon excitation for the design of spectrally selective absorbers. The absorption behaviour of metal islands can be influ…
Macromolecular crystals are usually cooled to approximately 100 K for X-ray diffraction experiments in order to diminish lattice damage arising from the ionizing radiation. Such cooling often produces lattice disorder, but this disorder can sometimes be substantially reduced by cycling the crystal between low and high…
We investigate the interaction of a carbon nanotube with a graphite substrate, using an interlayer potential that explicitly treats the registry dependence of the interaction. The carbon-carbon bond lengths in nanotubes differ slightly from those in flat graphite, so that the naively commensurate angular orientations…
Abstract Summary: The morphology and tensile deformation behaviour of a highly asymmetric styrene/butadiene star block copolymer (polystyrene (PS) content = 74%) containing random PS‐ co ‐PB (polybutadiene) copolymer as a rubbery phase were investigated. The existence of double yielding, similar to that observed in so…
There are many kinds of silks spun by silkworms and spiders, which are suitable to study the structure-property relationship for molecular design of fibers with high strength and high elasticity. In this review, we mainly focus on the structural determination of two well-known silk fibroin proteins that are from the d…
We report a Monte Carlo study of the pathway for crystal nucleation in a fluid of hard, colloidal rods. In the earliest stages of nucleation, a lamellar crystallite forms. Subsequent thickening of this lamella is hampered by the fact that the top and bottom surfaces of this crystallite are preferentially covered by ro…
The performance of many solid-state devices including emissive displays, optical sensors, integrated optical circuits, and light-emitting diodes can be improved by applying a transparent high refractive index coating (≥ 1.65) onto the light-emitting or light-sensing portion of the device. Ideally, the coating shoul…
Xylanases (1,4-beta-D-xylan xylanhydrolases; EC 3.2.1.8) hydrolyze the 1,4-beta-D-xylopyranosyl linkage of xylans. The detailed structural characterization of these enzymes is of interest for the elucidation of their catalytic mechanism and for their rational modification toward improved stability and specificity. An…
An air drawing model of polymers and a model of the air jet flow field in the melt blowing process are established. The flow field model is solved using the finite difference method. The numerical computation results of distributions of the air velocity and air temperature coincide with the experimental data. The air…
Plastic-bonded materials are composites consisting of grains of filler material embedded in a polymeric matrix. A micromechanics model is proposed for investigating the mechanical behaviour of plastic-bonded materials having two disparate grain sizes. A hybrid theory is proposed to handle some aspects of the bimodal g…
Abstract The particle scattering function P ( k ) is approximately evaluated for the Kratky–Porod wormlike chain with a circular cross section to examine the effect of chain diameter d on the scattering curve of k 2 P ( k ) versus k , the magnitude of the scattering vector, for stiff chains and also the applicability…
A novel high-throughput method was used to determine the effect of chain extender composition on the mechanical properties of segmented poly(urethane−urea)s. Combinatorial libraries with continuous gradients in chain extender composition (60 < φ < 160 mol % stoichiometry), cure temperature (70 < T < 110 °C), or both w…
The degradation of porous methyl silsesquioxane (MSQ) films (k=2.2) by plasma irradiation has been investigated using several kinds of gas chemistries, which are used for photoresist strip. The porous MSQ is easily degraded by O2 plasma ash process and the dielectric constant increases largely, even by using the condi…