Materials Literature
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The octanickel(II) cluster 2b has been synthesized from the novel ferromagnetically coupled dinickel(II) metallacryptand 1b assembled from the m-phenylene-bis(oxamate) ligand. Complex 2b exhibits a dimer-of-tetramers structure, with two oxamate-bridged propeller-shaped tetranuclear units connected through three meta-s…
Abstract The biological synthesis of CaCO 3 crystals of variable morphology by challenging non‐calcareous microorganisms such as fungi with aqueous Ca 2+ ions has been described. Many fungi are known to produce reasonable amounts of CO 2 during growth. We show here that CO 2 and characteristic proteins released from t…
This paper reports the use of a natural fibre ‘isora’ as reinforcement for natural rubber. Isora is a bast fibre separated from the bark of the Helicteres isora plant by retting. The effect of different chemical treatments on the fibre properties and on the mechanical performance of short isora fibre reinforced natura…
Abstract Thermoplastic vulcanizates (TPVs) or dynamic vulcanizates are a special class of thermoplastic elastomers, produced by mixing and crosslinking of a rubber and a thermoplastic polymer simultaneously. In a previous study, it was demonstrated that the use of dicumyl peroxide in combination with triallyl cyanurat…
The ternary complex of Escherichia coli adenylate kinase (ECAK) with its substrates adenosine monophosphate (AMP) and Mg-ATP, which catalyzes the reversible transfer of a phosphoryl group between adenosine triphosphate (ATP) and AMP, was studied using molecular dynamics. The starting structure for the simulation was a…
Abstract Hydrotalcite-like layered double hydroxides (LDHs) of Mg(II) and Mn(III) were prepared by a co-precipitation/air oxidation method using MgCl2 and MnCl2 as starting materials. Syntheses were studied at different precipitation temperatures and variable starting Mg/Mn ratios. MgMn-LDH were obtained at a preparat…
Titanite is a common accessory mineral in silicocarbonatite from the Afrikanda alkaline-ultramafic complex, Kola Peninsula, Russia. In addition to large crystals (described elsewhere), this rock contains microscopic crystals and aggregates of titanite intimately associated with, or mantling, primary Ti minerals (perov…
Al–Pb ribbons containing 1 at.% Pb have been produced by melt-spinning and subsequently investigated by high-resolution transmission electron microscopy. It is shown that the lattice mismatch of about 22% between the nanometre-sized Pb inclusions and the surrounding Al matrix is accommodated by a periodic array of mis…
We have investigated microscopic magnetoelectronic phase separation and phase evolution with temperature in ${\mathrm{La}}_{1\ensuremath{-}x}{\mathrm{Sr}}_{x}{\mathrm{CoO}}_{3}$, for $x$ in the range zero to 0.3, using high-field $^{139}\mathrm{La}$ NMR. For $x\ensuremath{\geqslant}0.1$ three coexisting magnetic phase…
Summary In most European disposal concepts, one expects large amounts of dissolved hydrogen produced by the anoxic corrosion of iron inside a damaged container. At repository temperatures (<100 °C), dissolved hydrogen is quite inert and is not expected to contribute to the redox capacity of the deep groundwaters. I…
Single-chain and TRIS-assembled collagen mimetic peptide structures incorporating catechol groups were synthesized. When 1/3 equiv of Fe3+ was added to the single-chain compound in 50 mM CAPS buffer (pH 10), the 1:3 Fe3+-catechol complex that formed acted as an N-terminal scaffold to assemble the triple helix. When 1…
This paper reviews the structures and properties of 10 binary, ternary, and quaternary crystals within the equilibrium phase diagram of the SiO 2 –Y 2 O 3 –Si 3 N 4 system. They are binary compounds SiO 2 , Y 2 O 3 , Si 3 N 4 ; ternary compounds Si 2 N 2 O, Y 2 Si 2 O 7 , and YSi 2 O 5 ; and quaternary crystals Y 2 Si…
Abstract Semiconductor quantum dots (QD) are nanometer‐sized crystals with unique photochemical and photophysical properties that are not available from either isolated molecules or bulk solids. In comparison with organic dyes and fluorescent proteins, QD are emerging as a new class of fluorescent labels with improved…
The valence of rare earth ions in R2MgSi2O7:Eu, Dy (R = Ca, Sr) long-afterglow phosphors was studies by L3 edge X-ray absorption near-edge structure (XANES) spectroscopy and photoluminescence spectroscopy. The results suggest that Eu ions are in a divalent and trivalent mixed-valence state while Dy ions exist in the t…
A method for the preparation of Cr‐doped Y 2 Sn 2 O 7 powders based on the pyrolysis of aerosols generated from aqueous salt solutions of the corresponding metal cations is reported. These powders yielded Cr‐doped pyrochlore red‐shade pigments on calcination in the absence of fluxes at lower temperature (900°–1100°C)…
Abstract Aperiodic crystals are defined as a crystalline state of matter, that has atomic structures with long-range order but without translational symmetry. Experimentally, they are characterized by sharp Bragg reflections in the X-ray diffraction, that can be indexed by integers, if four or more reciprocal basis ve…
Summary In the present work, we extracted Mo-Tc-Ru-Pd-Rh-Te alloy particles from spent fuel by a non-oxidative selective leaching of the fuel matrix, characterized them and studied their leaching behavior under different redox conditions. After selecting the optimal experimental conditions by using a synthetic alloy,…
Application of porous polymer materials to novel bio-interfaces for tissue engineering scaffold and artificial organs including blood filters, dialyzer, and oxygenator membranes have been in progress. The present study describes the fabrication and characterization of self-organized highly regular porous polymer films…
A limited combinatorial strategy was used to synthesize a small library of soft lipid-based materials ranging from structurally unordered fibers to highly uniform nanotubes. The latter nanotubes are comprised of a bilayer structure with interdigitated alkyl chains associated through hydrophobic interactions. These tub…
In this paper we describe a methodology for applying conventional morphological characterization techniques to some of the manufacturing processes of natural fibre reinforced thermoplastics (NFRTP). The composites studied consisted of a matrix of polypropylene or polyethylene, and of discrete jute, sisal and other nat…