Materials Literature
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Decellularized extracellular matrix has been suggested as a scaffold for heart valve tissue engineering or direct implantation. However, cell removal impairs the physical properties of the valve leaflet structure and the biomechanical properties of the valve leaflet. Matrix/polymer hybrid scaffold with improved biomec…
Abstract Three-fold symmetrical pyridinium salts tethering tridodecyloxyphenyl substituents form liquid-crystalline columnar and micellar cubic phases and exhibit photoluminescent properties in liquid-crystalline states.
In this work, polypropylene (PP)/polystyrene (PS) blends with different organoclay concentrations were prepared via melt compounding. Differing from the results of previous reports, the organoclay platelets are mostly located in the dispersed PS phase instead of the interface. The dimensions of the dispersed PS drople…
For achievement of high coercivity in Dy-free or -lean Nd-Fe-B permanent magnet system, understanding of reaction process between Nd-Fe-B main and Nd-rich phases is required. In this work, the wettability between Nd2Fe14B and Nd-rich phases was investigated by the measurement of contact angles under isothermal heating…
This work presents the results of studies of the Ti 49.4 Ni 50.6 alloy of enhanced purity with shapememory effects in an ordinary coarse-grained state with an average grain size of 20–30 μm or in a submicrocrystalline state with an average grain size of 0.2–0.3 μm. In this alloy the initial structure, phase compositio…
Inspired by recent experimental results, the electronic and magnetic properties of sulfur-passivated ZnO clusters and zigzag nanoribbons have been studied using first principles calculations in the framework of the local spin density approximation. In the case of the ZnO nanoribbons, the sulfur atoms or thiol groups w…
It is well known that the measurement of ferrite core losses is difficult, particularly under low power factor conditions for which the excitation VA drawn is large relative to the power dissipated in the ferrite core. This paper proposes a new technique, called mutual inductance neutralization, which overcomes this d…
The studies carried out at the Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, on the selective catalytic oxidation of organic compounds with oxygen in the presence of aqueous solutions of Mo-V-phosphoric heteropoly acids (HPAs) are reviewed. Alkylphenols are oxidized into 1,4-quinones with a sel…
The temperature dependence of the magnetoelastic properties of a series of germanium/cobalt co-substituted cobalt ferrite samples has been measured. Magnetostriction loops of the compositions Co1+xGexFe2-2xO4(x = 0.1 , 0.3, and 0.6) were measured over a temperature range of 250-400 K. Germanium/cobalt co-substitution…
A new series of materials with a chiral fragment derived from lactic acid and a methoxy group as lateral substituent in different positions of the molecular core was synthesised and investigated. Derivatives with ester or ether linkages of the non‐chiral chain were also studied. Depending on the molecular structure, c…
We successfully prepared a series of transparent blend films from castor oil-based polyurethane (PU) and p -phenylene diamine soy protein (PDSP). The miscibility, morphology, and properties of the blend films were investigated with Fourier transform infrared spectroscopy, differential scanning calorimetry, dynamic mec…
A kinetic model has been developed to describe the growth of single-walled carbon nanotubes (SWNT) in the CoMoCAT method, which is based on the disproportionation of CO on supported CoMo catalysts. The model attempts to capture mathematically the different stages involved in this method: (i) catalyst activation or in-…
In the 1970s, deGennes discussed the fundamental geometry of smectic liquid crystals and established an analogy between the smectic A phase and superconductors. It follows that smectic layers expel twist deformations in the same way that superconductors expel magnetic field. We make a direct observation of the penetra…
BN tubular micro-/nanostructures were prepared in large scale from a simple unique chemical process onto the surface of a graphite substrate, using polypropylene and boron oxide as solid sources, and under an ammonia flow. The as-grown product is featured by a unique hierarchical tubular structure with BN microtubes c…
Abstract Summary: Gelatin is widely used in capsules manufacturing. Most of the capsules in pharmaceutical applications are hard capsules made out of concentrated solutions of gelatin, where water has been progressively removed during the drying process. More recently soft capsules found an increasing interest in phar…
Cuprous oxide (Cu2O) crystals were grown by the two step crystallization method in air atmosphere conditions from polycrystalline copper plates. The method comprises two stages; in the first one the copper plates are oxidized at 1020°C by some hours in line with its initial thickness. In the second stage the growth of…
Abstract Summary: Starting from gypsum as by‐product of lactic acid fabrication process, novel high performance composites have been produced by melt‐blending PLA and this filler after a previous specific dehydration performed at 500 °C for min. 1h. Due to PLA sensitivity towards hydrolysis, the utilization of β ‐anhy…
A decrease in the domain size of barium titanate (BaTiO 3 ) improves the piezoelectric constant ( d 33 ). Other considerations suggest the high d 33 of BaTiO 3 may be caused by the enhanced high dielectric constant ( ε 33 T / ε 0 ) at room temperature due to the size effect. However, we have clarified that even a samp…
Nephrogenic systemic fibrosis (NSF) has been observed with increased frequency in recent years. Progressive hardening of the skin advancing to severe woody induration and the development of thickened hyperpigmented plaques on the extremities and the trunk are the main clinical features. Further progression of the dise…
Ferri-ferromagnetic nanocomposites CoFe2O4-CoFe2were prepared via reduction of the cobalt ferrite CoFe2O4into a hydrogen atmosphere and by heat treatments. This preparation method yielded powders with relative volume fraction of CoFe2O4and CoFe2in the range 0-0.91. The structure and the room temperature magnetization…