Materials Literature
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The major barrier to accelerating the transition from 2D fabric lamination to integral 3D textile preforms is the high costs. Toward this end, substantial researches have been conducted. This paper reports on a conventional approach to the forming of 3D flat woven preforms in a shuttle-weaving machine. The factors in…
The gas (air and hydrogen) flow through porous silicon ($\mathrm{PS}$) nanostructures is studied. Being well described by Darcy's law, the gas flow measurements allow us to deduce PS permeability values, which are measured to be ${10}^{--16}--{10}^{\ensuremath{-}15}\phantom{\rule{0.3em}{0ex}}{\mathrm{m}}^{2}$, corresp…
Three-dimensional fibre-reinforced polymer composites made by the textile processes of weaving, braiding, stitching and knitting have tremendous potential for improving the performance of composite structures and reducing their cost of manufacture. Current applications of three-dimensional composites are described, in…
The FoldMiner web server (http://foldminer.stanford.edu/) provides remote access to methods for protein structure alignment and unsupervised motif discovery. FoldMiner is unique among such algorithms in that it improves both the motif definition and the sensitivity of a structural similarity search by combining the se…
Two branch-line couplers are introduced that utilize a combination of regular microstrip (MS) and negative-refractive-index (NRI) lines. Interesting phase compensation (0/spl deg/ phase shift) at the output port and a choice of /spl plusmn/90/spl deg/ phase shift at the through port, with respect to the input, are pos…
The rheological properties of wood fiber reinforced thermoplastics blends are important to practical industry application, however few research is available regarding this field. In this study, a C. W. Brabender Plasti-Corder torque rheometer was used to examine the flow behavior of wood flour filled polypropylene (PP…
The ultraviolet absorption and emission spectra of Ce 3+ doped phosphate glasses based on gadolinium and sodium phosphates are studied in the present work. Compared with the cerium‐free phosphate glass matrixes, CePO 4 doping shifts the ultraviolet absorption edge of glasses into the longer wavelength because of the 4…
We study morphological transitions between microphase-separated structures in diblock copolymers. By means of the two-mode approximation, kinetics of order−disorder (ODT) and order−order transitions (OOT) in the weak-segregation limit are investigated by solving numerically a coupled set of the amplitude equations for…
The crystal structure of ramsdellite, MnO 2 , was refined using time-of-flight powder neutron diffraction data and the Rietveld method in order to assess the effects of reduction in cathodic battery materials. For the first time, we present a refined structure for “groutellite,” a heretofore poorly characterized phase…
Abstract Carboxymethyl starches (CMS) with a degree of substitution (DS) in the range of 0.5 to 1.5 and reagent yields about 70% were synthesised under heterogeneous reaction conditions. Starting from a standard procedure for manufacturing low substituted CMS the molar ratios of the reagents were increased. Under thes…
The dynamic compressive responses of AD995 alumina have been determined as a function of loading rates and damage levels. To determine the dynamic properties under loading conditions simulating those encountered in ceramic armors subjected to impact, a novel dynamic compressive experimental technique modified from a s…
Tetrafluoroborate ion (BF(4)(-)) serves as a powerful and better-behaved promoter than fluoride ion (F(-)) for hydrolytic condensation of alkoxysilanes, such as tetraethoxy orthosilicate, in aqueous media containing amphiphiles with onium ion headgroups as templates, affording thermally and hydrothermally stable mesop…
Microbiologically influenced corrosion (MIC) of stainless steel (SS) can be caused by the action of metal-oxidizing bacteria (MOB) in natural, relatively low-chloride waters. This type of corrosion is frequently associated with ennoblement of the open-circuit potential and involves iron-oxidizing bacteria (IOB) and ma…
Abstract In this study, polymer‐clay nanocomposites of various concentrations were prepared by ultrasonically assisted polymerization and melt‐mixing processes. A sonication process using power ultrasonic waves was employed to enhance nano‐scale dispersion during melt‐mixing of polymer blends and organically modified…
Bulk, isotropic and anisotropic nanocomposite magnets of (Nd,Pr,Dy)/sub x/Fe/sub 100-x-y-z-u-v/Co/sub y/Al/sub z/Ga/sub u/B/sub v/ with x= 8-11.6, y= 6-6.3, z= 0-0.2, u= 0-0.2, and v= 5.6-10.0 were prepared and their magnetic properties as functions of rare-earth content, hot press temperature, and hot-deformation amo…
Projectile impact generates severe fragmentation in ceramics which propagates at high velocities and precedes the penetration of the projectile. The high‐speed photographic technique of the Edge‐On Impact (EOI) has been developed at the Ernst‐Mach‐Institute (EMI) in order to visualize dynamic fracture in brittle mater…
Phosphoenolpyruvate carboxykinase (PCK), which catalyzes the nucleotide-dependent, reversible decarboxylation of oxaloacetate to yield phosphoenolpyruvate and CO2, is one of the important enzymes in the interconversion between C3 and C4 metabolites. This study focused on the first characterization of the enzymatic pro…
Abstract The present study describes the preparation of low‐substituted hydroxypropyl (HP) starches and investigation of their suitability for the development of flexible, highly transparent cast films. Changes in molecular composition due to processing conditions were identified by determining molar mass distribution…
It is empirically known that an armor ceramic should be as hard or harder than the projectile it intends to defeat. Quasi‐static indentation testing is one of the most widely utilized techniques for determining the hardness of armor ceramics. Hardness measurements can also be used to generate other property values tha…
A multi-walled carbon nanotube/polypyrrole (CNT/PPy) nanocomposite with cable-like morphology has been synthesized using an in situ chemical oxidative polymerization method. The temperature dependences of the conductivity and magnetoresistance (MR) have been studied. We found that the room temperature conductivity inc…