Materials Literature
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The study of the metastable state, obtained by light irradiation of Na2Co4[Fe(CN)6]3.3·14H2O is reported using reflectivity and magnetic measurements. This compound is characterized by a charge transfer phenomenon occurring between a high-temperature phase (HT phase) formed by paramagnetic CoII–FeIII pairs and a low-t…
Granular potato starch was successfully borated with boric acid and sodium tetraborate decahydrate (borax) in a microwave-assisted solid state reaction. Products of starch boration reached (dependently on the conditions of the process) the maximal value of the degree of esterification (DE) equal to 0.27 when boric aci…
The influence of the cationic sites on the luminescent properties of Eu3+ in Gd2BaZnO5 has been investigated by the site-selective laser excitation and emission spectroscopy along with luminescence decays. It has been revealed that the Eu3+ ions occupy two cationic sites. The Stark energy levels of Eu3+ at two differe…
Vliv mechanických vlastností a opotřebení silně namáhaných pryžových částí je popsán v tomto článku.
Abstract:- This paper presents the electromagnetic pollution produced by the line frequency coreless induction furnaces in the power supply network. We analyzed a furnace with 12.5 t capacity of cast-iron. The measurements have been made in the secondary of the furnace transformer, using the CA8334 three-phase power q…
Bulk glassy alloy rods with a diameter of 20 mm were produced for Zr61Ti2Nb2Al7.5Ni10Cu17.5 and Zr60Ti2Nb2Al7.5Ni10Cu18.5 by a tilt casting method. The replacement of Zr by a small amount of Ti and Nb caused a distinct increase in the maximum diameter from 16 mm for Zr65Al7.5Ni10Cu17.5 to 20 mm, accompanying the decre…
Ceria-based catalysts are good candidates for integrating methane combustion and hydrogen generation. These new, tuneable catalysts are easily prepared. They are robust inorganic crystalline materials, and perform well at the 400 °C–550 °C range, in some cases even without precious metals. This makes them attractive f…
Structural analysis of the resting state of [NiFe]hydrogenase ([NiFe]H(2)ase) shows that the active site has a characteristic bis(mu-thiolato)NiFe unit, where the Ni atom and the Fe atom are bridged by an undetermined oxygen-bearing ligand. This ligand probably derives from the aqueous solvent and is therefore most li…
Microwave-assisted, solid-state grafting of multiwalled carbon nanotubes is presented for the synthesis of a thermal polyurethane composite. This one-step method reduced the reaction time to the order of minutes and allowed the polyurethane to be directly attached to the nanotubes, thus forming a highly solvent-disper…
Colloidal magnetic iron platinum nanoparticles were embedded at different densities into the walls of polyelectrolyte multilayer capsules. Changes in their magnetic properties such as relaxivities as a function of average distances between the magnetic nanoparticles were investigated and their properties for magnetic…
In the Mechanistic–Empirical Pavement Design Guide (MEPDG), one of the most important material inputs for designing flexible pavements is the dynamic modulus ( E * ). Currently, AASHTO has provided a provisional test specification for measuring the E * of hot-mix asphalt mixtures, AASHTO TP62-07 [Standard Method of Te…
Optical emission spectroscopy was used to study pulsed laser ablation of graphite in a hydrogen atmosphere wherein ultrananocrystalline diamond (UNCD)/hydrogenated amorphous carbon (a‐C:H) composite films were grown on heated substrates. Time‐resolved photographs of a plume that expanded from a laser‐irradiation spot…
The applicability of single-molecule surface-enhanced Raman spectroscopy to a nonbonding molecular system is demonstrated on a uniformly assembled colloidal Ag nanoparticle substrate.
Recent two major topics of Large Helical Device (LHD) towards fusion relevant conditions, high-density operation and high-ion-temperature operation, are reported. Super dense core plasma was obtained by the combination of repetitive hydrogen ice pellet injection and high power neutral beam injection (NBI) heating. A v…
Article Cell Elements, Growth Modes and Topology Evolutions of Fractal Supper Fibers was published on January 1, 2009 in the journal International Journal of Nonlinear Sciences and Numerical Simulation (volume 10, issue 1).
We report the effects of hydrogenation on the structure and superconducting properties of good quality bulk superconducting CaC6 samples prepared from Madagascar graphite single crystals using a Ca-metal vapour transport method. The hydrogenation of a CaC6 sample takes several hours during which, at different hydrogen…
In this work, reactively sputtered TiO 2 films were reported to contain reduced Ti ions, the concentration of which correlates to the conductive channels formed in the film through percolation. Cells made on these films appear with different switching behaviors, depending on whether the as-fabricated cell intercepts t…
Eine schier unüberschaubare Zahl an Werkstoffen mit den unterschiedlichsten, oft faszinierenden Eigenschaften steht dem Ingenieur zur Verfügung. Dieses Buch führt in die spannende Welt der Metalle ein, erklärt deren Eigenschaften, wie diese durch spezielle Behandlung beeinflusst und mit welchen Methoden die Werkstoffe…
Terbium (Tb)-doped Zn3N2 thin films were prepared on glass and Si substrates by direct current magnetron sputtering in a mixture of pure argon and nitrogen gases. Glancing incidence x-ray diffraction patterns indicated that Zn3N2:Tb thin films were of cubic structure. Raman spectra showed only two Raman-active phonon…
No-Bias-Bend Liquid-Crystal Display with an Intermediate Angle on Blended Polyimide via Ion-Beam Irradiation, Park, Hong-Gyu, Oh, Byeong-Yun, Kim, Young-Hwan, Kim, Byoung-Yong, Han, Jeong-Min, Hwang, Jeong-Yeon, Seo, Dae-Shik