Materials Literature
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The angiogenic agent erucamide (cis-13-docosenamide), incorporated into a polymeric biomaterial (Elvax 40P, a copolymer of ethylene and vinyl acetate), was used to determine whether angiogenesis can be increased in the regenerating skeletal muscle, and whether the enhanced revascularization improves the new muscle for…
The time-resolved emission spectra and lifetimes of a series of lanthanide acylpyrazolones complexes were measured under 266 nm laser excitation. The phosphorescence spectra of the triplet states of the Gd(III) complexes were observed at room temperature. The relative efficiencies of intramolecular energy transfer fro…
This paper presents a neural network model for predicting the yarn irregularity, based on inputs of fiber property measurements with the AFIS instrument. By using a back-propagation neural network algorithm, alternative models were fitted and compared. The resulting predictions of yarn irregularity are superior to the…
The crystallization of InSe from bulk amorphous indium−selenium alloys was studied as a function of composition. The composition dependence of the nucleation energy of InSe from amorphous alloys was determined using a Kissinger analysis of differential scanning calorimetry data. A minimum in the nucleation energy was…
Mg-Al layered double hydroxides have been synthesized and 1,5-naphthalene disulfonate dianions have been intercalated; the organic molecules were carbonized within the layered framework. For comparison, a reference carbon was prepared from the sodium salt of the 1,5-naphthalene disulfonic acid precursor using conventi…
The thermoreversible gelation of agarose has been investigated in four different aqueous binary solvents: water/dimethyl sulfoxide, water/ N, N -dimethylformamide, water/ N -methylformamide, and water/formamide. The thermal behavior through the gelation/melting temperatures and the gelation/melting enthalpies has been…
A model system of short polystyrene−polyisoprene diblock copolymers mixed with the corresponding strongly segregated long diblock copolymers is studied by small-angle X-ray scattering, electron microscopy, and self-consistent mean-field calculations of the ordered microphases. It is found that most of the small dibloc…
In-situ extended X-ray absorption fine structure (EXAFS), 1 H and Xe nuclear magnetic resonance (NMR), H 2 chemisorption, X-ray powder diffraction (XPD), and high-resolution electron microscopy (HREM) techniques were used to understand, as precisely as possible, carefully prepared Pt/Y zeolite samples at industrially…
A direct relationship between a generalized Fukui function and charge redistribution between states of different multiplicities is exploited to rationalize the stability of half-filled shells. This rationalization is in agreement with the idea introduced by Boyd (Boyd, R. J. Nature 1984, 310, 480) that Hund's rule is…
New segmented polyurethanes (SPUs) based on stearyl and phosphatidylcholine analogues were synthesized. The soft segments used in this study were the poly(butadiene) (PBD) glycol, the hard segments of these SPUs were composed of 4,4‘-methylenediphenyl diisocyanate (MDI), 2-[bis(2-hydroxyethyl)methylammonio]ethyl stear…
Two octadecanuclear clusters [Cu12Ln6(µ3-OH)24(O2CCH2CH2NC5H5)12(H2O)16(µ12-ClO4)][ClO4]17·16H2O (LnIII= GdIII or SmIII) have been synthesized and characterized by X-ray structural analysis. The clusters are isostructural, crystallizing in the triclinic space group P with Z= 1. In each structure six LnIII are position…
Detailed X-ray photoelectron spectroscopy analysis of sulfonated high-density polyethylene (HDPE) prepared by using a gaseous mixture of SO 3 + N 2 was carried out. It was shown that the surface contains, apart from sulfonic acid groups, sulfate, keto, and polyene linkages. The evolution of the different surface group…
The surface conditions of glassy carbon (GC) electrodes anodized in n-CnH2n+1OH (2=2, 4, 6, 8 : electrodes 1-4), HO(CH2)nOH (n=2-5 : electrodes 5-8), and HO(CH2CH2O)2CH2CH2OR (R=H, Me : electrodes 9 and 10) were explored by measuring the wettability and capacitance as well as the voltammetric response to Fe(CN)3-6;wet…
The 1 H NMR spectra of [YbH(tpp) 2 ] ( I ), [DyH(tpp) 2 ] ( II ), [YbH(oep)(tpp)] ( III ), and [DyH(oep)(tpp)] ( IV ), where tpp is tetraphenylporphyrin and oep is octaethylporphyrin, have been analyzed. The aim of this research is to set the limits of information which can be obtained through sophisticated NMR experi…
Solutions of polystyrene in DOP were studied as a function of the concentration (0.2−0.9 g/mL) and temperature (−10 to +130 °C) using static and dynamic light scattering. The concentration and temperature dependence of the cooperative diffusion coefficient and the osmotic modulus were determined. The concentration and…
The properties of new 2,2‘-ethanediylidene(1,3-dithiole) derivatives 5, 6, and 8 − 11 are reported. Cyclic voltammetric studies establish that they are efficient donor molecules, with the extended conjugation resulting in stabilization of dications, relative to tetrathiafulvalene TTF ( 1 ). Radical cations are generat…
Stepwise oxidation of tetrathiafulvalenyl(diphenyl)phosphine (1), 4′,5′-dimethyltetrathiafulvalen-4-yl(diphenyl)phosphine (1a), bis(tetrathiafulvalenyl)phenylphosphine (2), bis(4′,5′-dimethylt-tetrathiafulvalen-4-yl)phenylphosphine (2a), tris(tetrathiafulvalenyl)phosphine (3) and tris(4′, 5′-dimethyltetrathiafulvalen-…
The deformation of duplex structures in general and duplex stainless steels (DSS) in particular is very complex. The existence of the massive second phase leads to numerous unexpected features, i.e. the microstructure is the most decisive influence parameter on the deformation behavior of duplex structures. In the cas…
Part 1 Toughened thermosets: epoxy resins unsaturated polyester resins thermosetting polymides. Part 2 Toughened thermoplastics: nucleation processes in toughened plastics isotactic polypropylene based blends polyamide 6/ethylene-co-vinylacetate blends - a model system of thermoplastic/elastomer pairs blends polyamide…
In a continuing search for mixed-valence copper phosphate compounds, crystals of a novel copper(I/II) oxophosphate chloride, Na 2 Cu 4 P 2 O 9 Cl, have been grown in a low-temperature eutectic flux of 23% NaCl and 77% CuCl (mp = 315 °C). The title compound crystallizes in an orthorhombic lattice, Cmcm (No. 63), with a…