Materials Literature
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The model of transient enhanced diffusion of ion-implanted As is formulated and the finite-difference method for numerical solution of the system of equations obtained is developed. The nonuniform distribution of point defects near the interface and more accurate description of arsenic clustering are simultaneously ta…
Numerous bacteria have been found to exhibit the capacity for intracellular polyhydroxyalkanoates (PHA) accumulation. Current methods for PHA production at the industrial scale are based on their synthesis from microbial isolates in either their wild form or by recombinant strains. High production costs are associated…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCarbon Flatland: Planar Tetracoordinate Carbon and FenestranesReinhart KeeseView Author Information Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, 3012 Bern, Switzerland Cite this: Chem. Rev. 2006, 106, 12, 4787–4808Publication Date (Web):Novem…
We discuss the effect of certain types of static disorder, like that induced by curvature or topological defects, on the quantum correction to the conductivity in graphene. We find that when the intervalley scattering time is long or comparable to tau(phi), these defects can induce an effective time-reversal symmetry…
Metallic and semiconducting carbon nanotubes generally coexist in as-grown materials. We present a gas-phase plasma hydrocarbonation reaction to selectively etch and gasify metallic nanotubes, retaining the semiconducting nanotubes in near-pristine form. With this process, 100% of purely semiconducting nanotubes were…
The surface comparison of different serine-threonine and tyrosine kinases reveals a set of 30 residues whose spatial positions are highly conserved. The comparison between active and inactive conformations identified the residues whose positions are the most sensitive to activation. Based on these results, we propose…
Abstract The enzymatic degradation of poly( L ‐lactic acid) (PLLA) fibers with different low draw ratios (1.0, 1.2, and 1.4 times) was investigated in tris‐HCl buffer solution (pH = 8.6) with proteinase K by the use of gravimetry, scanning electron microscopy (SEM), gel permeation chromatography (GPC), differential sc…
Abstract In vitro degradation behavior of dry‐jet‐wet spun poly(lactic acid) (PLA) monofilament and knitted scaffold were studied at three different pH i.e., at 4.6, 7.4, and 8.0 at 37°C for 20 weeks. Characterization of PLA by intrinsic viscosity, thermal properties, and scanning electron microscopy (SEM) was carried…
Abstract Single crystals of non‐linear optical (NLO) LAHClBr were grown by slow evaporation technique from its aqueous solution. Good optical quality crystals having dimensions up to 12 × 9 × 7 mm 3 were obtained. The lattice parameters and morphology for the grown crystals were determined using single crystal XRD. Th…
In this paper, a semi-analytical method based on a Fourier expansion technique and transmission line modelling has been proposed for the full-wave modal analysis of optical waveguides. As a first step, the dielectric waveguide is periodically repeated in one transverse coordinate direction with an appropriate period.…
Abstract Flexible epoxy matrices, having a good vibration damping capability, were nanoreinforced using an organoclay. The nanocomposites were characterized by X‐ray diffraction (XRD) and transmission electron microscopy (TEM) analysis. The effect of matrix flexibility on the reinforcing effect was investigated. It wa…
Oxygen $1s$ near-edge x-ray absorption spectroscopy and x-ray diffraction investigations on ${\mathrm{La}}_{1\ensuremath{-}x}{\mathrm{Sr}}_{1+x}\mathrm{Mn}{\mathrm{O}}_{4}$ $(0\ensuremath{\leqslant}x\ensuremath{\leqslant}0.5)$ single crystals evidence a doping- and temperature-dependent redistribution of ${e}_{g}$ ele…
Photoluminescence of Y 2.3− x Tb x Ce 0.05 Gd 0.65 Al 5 O 12 ( x = 0.575, 1.15, 1.725 and 2.3) has been measured at room temperature at high hydrostatic pressure. Under excitation at 457 nm, the broad band emission related to interconfigurational transition from the lowest state of excited electronic configurations 5d…
Abstract Polystyrene‐ graft ‐poly(ethylene glycol) copolymers (PS‐ g ‐PEG) were successfully synthesized using the “grafting‐through” method. The graft copolymers and the surface properties of their coats were characterized by 1 H‐NMR, gel permeation chromatography (GPC), differential scanning calorimetry (DSC), trans…
Abstract The aim of this study was to determine whether the acrylonitrile (ACN) content influences the permeation resistance of disposable nitrile rubber (NBR) gloves to aqueous solutions of the pesticide captan. Attenuated total reflectance/Fourier transform infrared (ATR–FTIR) spectrophotometry at 2237 ± 5 cm −1 was…
Abstract A constitutive model for tensile behavior of PMMA/clay nanocomposite foams was developed in this study. The elastic modulus of the nanocomposites is affected by the form of clays embedded in the polymer matrix. The reinforcing effect by intercalation of the clays and the detrimental effect by clay agglomerati…
OBJECTIVE: We compared host response, architectural integration and tensile strength of two different macroporous silk constructs to a polypropylene type I implant in a rat model for augmentation of primary fascial defect repair. MATERIALS AND METHODS: Animals were sacrificed on days 7, 14, 30 and 90 after implantatio…
Many immunotherapeutic strategies developed in recent years involve the targeting of immune cells to tumors. In this study, we synthesized and characterized modified fluorescent nanoparticles as a targeting and delivery system, by conjugating both tumor targeting agent and chemokines to the nanoparticles, to attract i…
Kinetics of the hydrogenation of hydrogen peroxide (at 278 and/or 300 K) over Pd(5 wt%)/carbon in aqueous medium with or without containing acid or different halide anions (F -, Cl -, Br -, or I - ) under static H 2 (i.e. batchwise) or flowing H 2 (i.e. semi-batchwise) at atmospheric pressure have been thoroughly stud…
Abstract A series of new aromatic polyamides containing cinnamide pendent units were prepared from 2′‐(cinnamide)ethyl‐3,5‐diaminobenzoate and various aromatic dicarboxylic acids by the direct polycondensation reaction, with triphenyl phosphite and pyridine as condensing agents. The polyamides were characterized by 1…