Materials Literature
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Two types of dendritically functionalized iron(II) porphyrins were prepared (Scheme) and investigated in the presence of 1,2-dimethylimidazole (1,2-DiMeIm) as the axial ligand as model systems for T(tense)-state hemoglobin (Hb) and myoglobin (Mb). Equilibrium O2- and CO-binding studies were performed in toluene and aq…
Oxide polypyrrole (PPy) composite films have been studied as protective coatings for iron. PPy films, containing strong oxidative species like oxide, have been obtained in order to maintain the polymer in its oxidized state which corresponds to the iron passive domain. Oxide particles in suspension in pyrrole/tetraoxa…
Taking advantage of the Curie contribution to the relaxation of the protons in the Tb(III) complex, and the quadrupolar relaxation of the 17O and 2H nuclei on the Eu(III) complex, the effect of the internal motion of the water molecule bound to [Ln(DOTAM)(H2O)]3+ complexes was quantified. The determination of the quad…
This Highlight provides a concise review of several useful concepts in the targeted synthesis of a series of crystalline, porphyrin-based supramolecular arrays, employing suitably activated building blocks. Different modes of the supramolecular assembly are demonstrated, exploiting the functionality and directionality…
The in vitro and in vivo degradation of poly-L-lactic acid cages used as an adjunct to spinal arthrodesis was investigated. In the in vitro experiments cages were subjected to aging up to 73 weeks in phosphate-buffered solution (pH 7.4) at 37 degrees C. Inherent viscosity, crystallinity, and mechanical strength were d…
In this study, a novel process for depositing tin oxide thin films by electrodeposition has been developed. Amorphous phase of the as-deposited film was obtained at the temperature of 85°C. Nanocrystalline SnO 2 having tetragonal structure with a grain size in the range of 4 to 7 nm was obtained by heat-treatment at 4…
[reaction: see text] A Cu(II) complex of the first aryl-substituted tripyrrinone derivative, 14-benzoyl-5,10-diphenyl-1-oxo-tripyrrinato copper(II) (3-Cu) was obtained in the reaction of N-confused tetraphenylporphyrin (NCTPP) and Cu(OAc)(2) in refluxing toluene, and subsequent treatment with acid afforded a free trip…
The swelling properties of physisorbed polyelectrolyte multilayer self-assemblies with alternating polyion charge in humid air and in aqueous environment were investigated via X-ray and neutron reflectometry as well as optically, using surface plasmon spectroscopy. The sorption behavior was similar to that found for n…
We developed a novel transparent conductive film, molybdenum-doped indium oxide (IMO). Using normal thermal reactive evaporation without any special treatments, IMO films have been prepared on normal glass microscope slides at about 350 °C with electrical resistivity of 1.7×10−4 Ω cm, mobility over 100 cm2 V−1 s−1, an…
Plasma-enhanced chemical vapor deposition (PECVD) is a versatile technique for growing well-aligned, precisely patterned, multiwalled carbon nanotubes directly on substrates. We report on the characterization of PECVD deposited nanotubes using Auger Electron Spectroscopy (AES); we believe that this is the first compre…
A new in vitro flow system was developed to investigate the impact of laminar flow on extracellular matrix formation and tissue development. The dynamic in vitro system was designed to provide a cross flow arrangement of main flow induced by a dialysis roller pump (500 ml/min), and nutrition flow by a perfusion pump (…
Stoichiometric mixing of the segmental ligand 2-{6-[N,N-diethylcarboxamido]pyridin-2-yl}-1,1′-dimethyl-5,5′-methylene-2′-(5-methylpyridin-2-yl)bis[1H-benzimidazole] (L) with Ln(CF3SO3)3 (Ln = La–Lu) and Cr(CF3SO3)2 under an inert atmosphere produces quantitatively the self-assembled triple-stranded non-covalent podate…
In this paper, we present recent advances in the understanding of the properties of semiconducting single wall carbon nanotube and in the exploration of their use as field-effect transistors (FETs). Both electrons and holes can be injected in a nanotube transistor by either controlling the metal-nanotube Schottky barr…
The structure of the complex [La(H2O)7Al(OH)6Mo6O18]n·4nH2O is the first example of a 1D extended chain in which an Anderson type heteropolyanion is linked by rare earth metal ions in zig-zag chains that arrange “head to tail” in the structure; furthermore the chains are themselves linked into an extensive three-dimen…
This series of books, which is published at the rate of about one per year, addresses fundamental problems in materials science.The contents cover a broad range of topics from small clusters of atoms to engineering materials and involves chemistry, physics, materials science and engineering, with length scales ranging…
Erbium-doped Si nanocrystal based optical waveguides were formed by Er and Si ion implantation into SiO2. Optical images of the waveguide output facet show a single, well-confined optical mode. Transmission measurements reveal a clear Er related absorption of 2.7 dB/cm at 1.532 μm, corresponding to a cross section of…
The development and testing of a biomimetic active hydrofoil that utilizes Shape-Memory-Alloy (SMA) actuator technology is presented. This work is the second stage in the development of a vehicle that has a skeletal structure similar to that of aquatic animals and SMA actuators for muscles. The current work describes…
The ASTRAL compendium provides several databases and tools to aid in the analysis of protein structures, particularly through the use of their sequences. It is partially derived from the SCOP database of protein domains, and it includes sequences for each domain as well as other resources useful for studying these seq…
Transient methods are widely used to determine the thermal transport properties of dielectrics and other materials. We investigated the limits and potentials of the transient hot-strip (THS) method for the simultaneous determination of the individual thermal conductivity and the thermal diffusivity of layered composit…
In a previous study, it was found that Keggin-structural polyoxotungstates such as undecal11ngstosilicate ([SiWi1039]S-, SiWn) greatly sensitizes strains of methicillin-resistant Staphylococcus arrreas (MRSA) to B-lactam antibiotics. Of the related tungsten compounds tested, undecatungstocobalto(II)silicate ([SiWnOnCo…