Materials Literature
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Persistence of infection can occur when the host immune response is compromised because of the presence of a foreign implant. Surface modification of biomaterials with phospholipid polymers may enhance biocompatibility and reduce incidence of infection by impeding bacterial and leukocyte adhesion. A rotating disk mode…
Abstract A series of alumina supported Pd‐ZnO catalysts were synthesized and studied for methanol steam reforming. Pd loading and Pd/Zn ratio were optimized to improve catalyst activities. Among all the catalysts studied, the catalyst with a Pd loading of 8.9 wt % and a Pd/Zn molar ratio of 0.38 exhibited the highest…
Traditional vanadate glasses are known to be totally black (see inset Figure), while their crystal counterparts are promising laser materials due to their large stimulated-emission cross-section. In this work, a novel transparent vanadate glass (see main Figure) is realized for the first time. Furthermore, when doped…
The use of peptide-based drugs is limited by their rapid degradability and toxicity at high concentration during their therapeutic application. These problems could be managed by the use of a peptide delivery agent for sustained release in the site of action. Collagen is one of the most proven biomaterials of good bio…
We present a potential of mean force surface for rotation about phi and psi dihedral angles of the alpha(1 --> 4)-glycosidic linkage in the maltose disaccharide (4-O-alpha-d-glucopyranosyl-d-glucopyranose) in aqueous solution. Comparison of the vacuum and solution free energy surfaces for maltose shows the principal e…
Spiders produce multiple types of silk that exhibit diverse mechanical properties and biological functions. Most molecular studies of spider silk have focused on fibroins from dragline silk and capture silk, two important silk types involved in the survival of the spider. In our studies we have focused on the characte…
Anodic porous alumina templates contain highly ordered nanochannels that are frequently used for fabrication of thermoelectric nanowires. Thermal properties of the templates are of high interest in thermoelectric device applications. This paper reports the temperature-dependent, anisotropic thermal conductivity and th…
A detailed neutron diffraction study of ${\mathrm{Sr}}_{2}{\mathrm{Fe}}_{1\ensuremath{-}x}{\mathrm{Cr}}_{x}\mathrm{Re}{\mathrm{O}}_{6}$ half-metallic double perovskites has been carried out. With increasing Cr content, the temperature for the cubic-tetragonal transition decreases (${T}_{t}\ensuremath{\approx}490\phant…
Abstract The role of the type of organic modifier used with montmorillonite (MMT) on the formation of polymer/clay nanocomposites in the melt compounding process was investigated. Various organoclays including primary [12‐aminolauric acid (12ALA)], secondary [dioctylamine (DOA)], tertiary [trioctylamine (TOA)], and tw…
Employing realistic many-body potentials for a series of simple melts, including Ag, Al, Au, Co, Cu, Mg, Ni, Pb, Pd, Pt, Rh, and Si, we tested by molecular-dynamics simulation the scaling laws of diffusion coefficients with different expressions of the reduction parameters. Our simulation results give sound support to…
We describe the synthetic route to ethylenediaminetetraacetic acid (EDTA) derivatives that can be attached to surface-exposed thiol functional groups of cysteine residues in proteins, via a methylthiosulfonate moiety that is connected in a stereochemically unique way to the C-1 carbon atom of EDTA. Such compounds can…
Abstract The growth and importance of medical and related health care and hygiene textile sectors are attributed to the improvement and innovations in both textile technology and medical procedures. The aim of this study was to examine some of the structural properties of pure poly(vinyl alcohol) (PVA) and hydroxyprop…
We report on the temperature dependence of magnetization, electrical resistivity, and specific heat for the Heusler-type ${\mathrm{Fe}}_{2\ensuremath{-}x}{\mathrm{V}}_{1+x}\mathrm{Al}$ alloys with compositions $\ensuremath{-}0.01\ensuremath{\leqslant}x\ensuremath{\leqslant}0.08$. The resistivity for a slightly $\mathr…
Atomistic simulations, confirmed by electron microscopy, show that dislocations in aluminum can have compact or dissociated cores. The calculated minimum stress (sigma(P)) required to move an edge dislocation is approximately 20 times smaller for dissociated than for equivalent compact dislocations. This contradicts t…
Abstract The water absorption of hemp fiber/unsaturated polyester composites was determined by immersing the samples in water or by exposing them to air with a relative humidity of 94%. The water absorption increased with increasing fiber content. By using images obtained with a magnetic resonance imaging (MRI) system…
The reduction of silver ions in formamide is shown to take place spontaneously at room temperature without addition of any reductant. The growth of Ag particles was found to be dependent on Ag+ ion concentration. In the absence of any stabilizer, deposition of silver film on the glass walls of the container takes plac…
Pyrolysis of poly(norbornenyldecaborane) that has been electrostatically spun provides a route to non-woven mats of boron-carbide/carbon ceramic nanofibers with narrow distributions and controllable dimensions (see Figure). This approach allows the fabrication of composite ceramic fibers with varying composition, whic…
A simple process was developed to prepare fluorescent nanocrystal–polymer complexes with flexible processability. From these complexes one may facilely fabricate macroscopic fluorescent bulk in different shapes and fluorescent microspheres. The Figure is a photoluminescene image of the resultant composites.
Liquid-feed flame spray pyrolysis allows the synthesis of 20 nm diameter hexagonal Y3Al5O12 nanopowders (see Figure) that show no evidence of a yttrium aluminum garnet (YAG) phase. The nanopowders can be easily formed into green bodies that sinter to the YAG phase at nearly full density. This novel material offers pot…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTUse of Xyloglucan as a Molecular Anchor for the Elaboration of Polymers from Cellulose Surfaces: A General Route for the Design of BiocompositesQi Zhou, Lionel Greffe, Martin J. Baumann, Eva Malmström, Tuula T. Teeri, and Harry Brum…