Materials Literature
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Abstract Thermal degradation behavior of a biodegradable polymer (PBS) has been investigated by conventional and MTGA methods. The kinetic parameters of degradation were calculated by a general analytical solution and by the Coats‐Redfern, Ozawa, Horowitz‐Metzger, and MTGA methods. The results reveal that the reaction…
Human fibrinogen (Fg) and albumin (HSA) were labeled with (3)H and (14)C, respectively. Dual counting allowed the adsorbed amount of the two proteins to be determined simultaneously. Single adsorption, adsorption of the two proteins in competition, but also exchange (substitution by molecules of the same nature) and d…
The opposite orientation of the ester spacers in the rodlike ligands L 4C12 (benzimidazole-OOC-phenyl) and L 5C12 (benzimidazole-COO-phenyl) drastically changes the electronic structure of the aromatic systems, without affecting their meridional tricoordination to trivalent lanthanides, Ln(III), and their thermotropic…
Abstract Antimicrobial films of 25 and 70¯m thickness, incorporated with 7 and 3% sorbic acid, respectively, were layered with pastry dough without additive and evaluated for sorbic acid migration and antimicrobial efficiency. Pastry dough containing potassium sorbate layered with low‐density polyethylene films (LDPE)…
Abstract In this Review, we discuss the rich anisotropic properties of the ferromagnetic semiconductor (Ga,Mn)As, and their implications in transport studies. We review the various sources and types of anisotropy seen in the material, discuss its magnetization reversal process, and demonstrate how basic transport prop…
Abstract In this article, electrospinning technique has been demonstrated for the synthesis of ultra‐low dielectric constant polyimide fiber membranes. Poly(amic acid) fiber membranes have been prepared as precursor. After the treatment of thermal imidization, ultra‐low dielectric constant polyimide fibers membranes c…
We have performed ultrahigh-resolution angle-resolved photoemission spectroscopy on high-quality single crystals of graphite to elucidate the character of low-energy excitations. We found evidence for a well-defined quasiparticle (QP) peak in the close vicinity of the Fermi level comparable to the nodal QP in high-T(c…
We have studied the structure and spectroscopic properties of the paramagnetic nonbridging oxygen hole center and of the ${E}_{\ensuremath{\gamma}}^{\ensuremath{'}}$ center at the hydroxylated silica surfaces using density functional theory and an embedded-cluster model. To investigate the influence of the local envir…
Hochstapler: Die Sulfate diprotonierter substituierter Cyclo[8]pyrrole bilden zusammen mit elektronarmen Acceptorverbindungen diskotische Flüssigkristalle. Die kolumnaren Mesophasen (siehe Bild; rot: Trinitrobenzol, grün: Cyclo[8]pyrrol-Einheiten, gelb: Sulfationen, grau: von den Substituenten ausgefüllter Raum) werde…
Abstract We report the synthesis and characterization of a series of novel mesogen‐jacketed liquid‐crystalline polymers, poly[2,5‐bis(4′‐alkoxycarbonylphenyl)styrene]s ( 1‐ m , where m is the number of carbon atoms in the alkyl tails), along with the corresponding monomers, 2,5‐bis(4′‐alkoxycarbonylphenyl)styrenes ( 2…
This Letter reports a molecular dynamics study of the temperature and size dependence of disclination relaxation in a bicrystalline titanium nanowire. The simulations show that an unstable disclination may relax via crack nucleation and/or structural transformation. The critical disclination strength to nucleate a cra…
Abstract Purpose – This paper aims to appraise the effectiveness of Gongronema latifolium extract as an environmentally friendly corrosion inhibitor for aluminium in strong acid (2 M HCl) and alkaline (2 M KOH) environments. Design/methodology/approach – Corrosion rates were determined using the gas‐volumetric techniq…
Mycobacterium tuberculosis caseinolytic protease ClpP1 (Mt ClpP1) is a self-compartmentalized protease consisting of two heptameric rings stacked on top of each other, thus enclosing a catalytic chamber. Within the chamber, which can be reached through two axial pores, each of the 14 identical monomers possesses a ser…
The University at Buffalo theoretical databank of aspherical pseudoatoms has been tested in the refinement of high-resolution (HR; d(max) < or = 0.44 A) and truncated ;low-resolution' (LR; d(max) = 0.83 A) X-ray diffraction data sets from the tripeptide Tyr-Gly-Gly monohydrate [Pichon-Pesme et al. (2000), Acta Cryst.…
The synthesis and self-assembly of twelve semifluorinated first-generation dendrons or minidendrons attached to electron-acceptor (n-type) groups generated from various combinations of eight acceptors and three dendrons are reported. Dendrons attached to small electron-acceptor molecules mediate their self-assembly in…
The phonon and thermodynamic properties of the divalent alkaline-earth hexaborides, $M{\mathrm{B}}_{6}$ ($M=\mathrm{Ca}$, Sr, Ba), and the reference elements $\ensuremath{\alpha}\text{\ensuremath{-}}\mathrm{B}$, fcc-Ca, fcc-Sr, and bcc-Ba are investigated on the basis of first-principles projector augmented wave metho…
Abstract Shape memory was induced in crosslinked low‐density polyethylene by a heating‐stretching‐cooling cycle. The effect of crosslink content on thermal properties and temperature dependence recovery behavior was studied experimentally. The importance of stretching temperature and crosslink content on recovery beha…
The predicted endohedral icosahedral clusters Pu@Pb12 (see picture; Pu blue, Pb yellow) and [Am@Pb12]+ have an outermost 32-electron system corresponding to formally occupied 7s, 7p, 6d, and 5f actinide orbitals, each of which interacts with a Pb 6p-based orbital of the [Pb12]2− cage. This study provides the first exa…
A series of BaTiO3–Ni0.55Zn0.45Fe2.03O4 composites are synthesized. The composites exhibit excellent dielectric and magnetic properties in the neighborhood of the percolation threshold—a high dielectric constant that is nearly temperature and frequency independent (see figure)–and considerable initial permeability wit…
Coulomb screening and the excitation spectra of electrons in a graphene layer with spin-orbit interaction (SOI) are studied in the random phase approximation. The SOI opens a gap between the valence and conduction bands and between the intraband and interband electron-hole excitation continuum of the semimetal Dirac s…