Materials Literature
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Silk fibroin (SF), isolated from silkworm (Bombyx mori) cocoons, is a natural biodegradable polymer. Over the past decade, there was some interest in using SF as a biomedical material. As part of a project to develop tissue-engineered constructs for the surgical restoration of the ocular surface (cornea, conjunctiva),…
Exzentrische Kristalle: 2×2×5 mm3 große NaI3O8-Einkristalle (siehe Bild) mit azentrischer Struktur wurden hergestellt. Die Kristalle sind bis 12.5 μm lichtdurchlässig, sodass sie die drei atmosphärischen Transparenzfenster abdecken, und sie zeichnen sich durch eine intensive zweite Oberschwingung und einen hohen Schwe…
In order to improve the hydrogenation property of Mg/Ti laminate composite, Ni was added as a third element. Hydrogen storage properties of the laminated Mg/Ti/Ni alloy films were studied. Laminated Mg/Ti/Ni multilayer alloy films were prepared by cold rolling of stacked Mg, Ti and Ni under ambient conditions. The sta…
Peculiar magnetic and electrical properties of new Heusler compounds ${\mathrm{Ru}}_{2\ensuremath{-}x}{\mathrm{Fe}}_{x}\mathrm{Cr}\mathrm{Si}$ are reported. It was found that ${\mathrm{Ru}}_{2\ensuremath{-}x}{\mathrm{Fe}}_{x}\mathrm{Cr}\mathrm{Si}$ for $0.3\ensuremath{\leqslant}x\ensuremath{\leqslant}1.8$ exhibits fer…
Microstructures and hydrogen storage properties of Mg-Al super laminate composite alloys were investigated. The laminated sample was made by alternately stacking Mg films and Al films. The laminate was subjected to repetition of stacking and cold-rolling under an ambient condition (super lamination technique), combine…
The effects of P and Cr addition and two-step aging on the microstructure and mechanical properties of a Cu-4wt%Ni-0.95wt%Si alloy have been examined. The addition of 0.02wt%P improves both strength and elongation because it suppresses discontinuous precipitation reaction. The Cr addition to the Cu-Ni-Si-P alloy decre…
Abstract Molecular modeling is used to explain how the resistance of poly[( L ‐lactide)‐ co ‐( D ‐lactide)] to hydrolysis is affected by the percentages of L ‐ and D ‐lactide and their arrangements in blocks or random arrangements in the polymer. Previous studies on improving the hydrolysis resistance of PLA have invo…
Abstract Five homologous series of α‐ and α,ω‐substituted oligothiophenes up to an undecamer with branched and linear alkyl chains, respectively, are presented. These series are compared with respect to self‐organisation in solution and in solid state. UV/Vis absorption data for the long disubstituted branched oligoth…
In the vicinity of the Fermi energy, the band structure of graphene is well described by a Dirac equation. Impurities will generally induce both a scalar potential as well as a (fictitious) gauge field acting on the Dirac fermions. We show that the angular dependence of the zero-bias anomaly in the spatially resolved…
Abstract Two new phenol‐type curing agents, (3) and (4) , were synthesized by the condensation of 4 (or 2)‐hydroxybenzaldehyde and 4‐aminophenol, followed by the addition of DOPO to the resulting imine linkage. Two reaction mechanisms, conjugate‐addition and carbocation mechanisms, were proposed. The fact that the rat…
A new generation polyol (generation-II) with significantly higher triol content and higher hydroxyl value was synthesized from canola oil by introducing a mild solvent (ethyl acetate) and a more efficient reductive reagent (zinc) to the previous synthetic procedure (Narine, S. S.; Yue, J.; Kong, X. J. Am. Oil Chem. So…
A hexanuclear cyano-bridged {MnII4NbIV2} cluster (1) bearing 2,2'-bipyridine (bpy) as the blocking ligand at manganese is obtained from the reaction of cis-[MnCl2(bpy)2] and K4[Nb(CN)8]. When the blocking ligand is 1,10-phenanthroline (phen), a nonanuclear cluster {MnII6NbIV3} (2) is obtained. The structure of [{Mn(bp…
Abstract The rheological response of a polyethylene/clay nanocomposite to annealing treatment under air and nitrogen atmospheres was studied. The treatment influences the rheology of the nanocomposite significantly. In particular, the viscosity and the non‐Newtonian behavior dramatically increase with annealing time,…
In order to clarify the effect of alloying elements on the axial ratio of magnesium binary solid solutions, the solid solutions of Mg-Al, Mg-Zn, and Mg-Li with various concentrations were casted and homogenized. Synchrotron X-ray diffraction patterns were then obtained from annealed powder samples and analyzed using t…
A low energy electron diffraction (LEED) I/V analysis was performed of the (4 x 4) oxygen structure on Ag(111). Two data sets were used, one recorded with a conventional LEED system and a second with a low energy electron microscope (LEEM). The data sets agree well with each other, demonstrating that I/V structure ana…
Außen ist Silber, innen ist Gold: Mit Goldnanopartikeln als Keimen wurde der Einfluss der Plasmonenanregung beim photochemischen Wachstum von Silbernanoprismen untersucht. Dieser Ansatz ergibt neuartige Kern-Schale-Nanostrukturen, in denen ein sphärischer (siehe TEM-Bild; Einschub: Seitenansicht) oder dreieckig-prisma…
A series of diimine-tetracyanoosmate anions [Os(diimine)(CN)4]2- [diimine=2,2'-bipyridine (bipy), 2,2'-bipyrimidine (bpym), 1,10-phenanthroline (phen), and 4,4'-tBu2-2,2'-bipyridine (tBu2bpy)] were prepared and isolated as their Na+ salts (water soluble) or PPN+ salts (soluble in organic solvents). Several examples we…
Abstract A hybrid emulsion polymerization was formulated for synthesizing Fe 3 O 4 /polystyrene composite latex. This system, containing binary droplets that are magnetic (Mag)‐droplets with a diameter of 100–200 nm and styrene (St)‐droplets with a diameter of 3–4 μm, was obtained by mixing Mag‐miniemulsion and St‐mac…
Fibrous poly(L-lactide) (PLLA) and bicomponent PLLA/poly(ethylene glycol) mats were prepared by electrospinning and then were coated with chitosan. The presence of chitosan coating was proved by scanning electron microscopy and by fluorescence microscopy. On contact with blood, the chitosan coating led to changes in e…
Abstract PCL/sepiolite (nano)composites are prepared by melt blending in a twin‐screw mini‐extruder, and PCL/sepiolite nanohybrids are synthesized by ROP of ε ‐CL. The nanohybrids have been used as masterbatches and dispersed in a commercial PCL matrix. Composites with 3 wt.‐% nanofiller were prepared and characterize…