Materials Literature
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The complex Cu(hfac)2(DMF)2 (where hfac = the anion of hexafluoropentanedione and DMF = dimethylformamide) has been prepared and its crystal structure has been determined by X-ray diffraction methods. The complex molecule locates around an inversion centre in the crystal state. Two DMF ligands coordinate to the Cu(II)…
Open circuit potentials of stainless steels increased when immersed in the Baltic Sea. The ennoblement potential was +200 mVsce in 40 to 50 days when sea water temperature was below 52°C and +300–400 mVsce within <40 days at around 102°C. Ennoblement occurred in a laboratory ecosystem at 232°C in 20 to 30 days, and at…
We have investigated the potentiometric response of ordinary pyrolytic graphite electrodes (OPG) modified with cobalt phthalocyanine (Co-Pc) for thiols (R-SH) 2-mercaptoethanol, L-cysteine and their corresponding disulfides (R-SS-R). Stable potentials are achieved after a few seconds of additions of different amounts…
Blends of polyurethane (vibrathane- 5008 Uniroyal Co., USA) and hypalon (CSM-350 Du Pont, USA) prepared by three different blending techniques, have been studied, over the entire composition range. The processability of the polyurethane rubber was improved as a result of blending with CSM. The IR spectral analysis sug…
The antioxidant activity of total flavonoid preparation from Solenostemon rotundifolius was investigated in normolipidemic and hyperlipidemic rats. Concentrations of peroxidation products namely malondialdehyde, hydroperoxides and conjugated dienes were decreased significantly in the tissues of rats administered flavo…
Pressure-time series from breathing-mode oscillation of large (centimeter scale or larger) underwater bubbles reveal much higher decay rates than can be explained using viscous, thermal, or radiative mechanisms which apply to microbubbles. It is shown that if one assumes energy transfer to shape oscillations (surface…
In order to examine the fission gas release behavior under restraint conditions, an out-of-pile high pressure annealing technique was applied to UO2 fuels irradiated to 37GWd/t in a BWR. The irradiated fuels were annealed at temperatures of 1,500–1,800°C and external pressures of 10–150MPa. The fractional release of 8…
The trapping of hydrogen by various interfaces in iron and steels has been studied. The hydrogen content of pure iron specimens was found to depend more on hydrogen than those of low angle, and thus specimens with low angle grain boundaries were less susceptible to hydrogen damage. Inclusions and thermo-mechanical tre…
Photochromic ring-closure reactions of diarylethene derivatives with terthiophene (T3H, T3Me) have been examined by femtosecond transient absorption spectroscopy. The rate of the ring-closure reaction of T3H in n-hexane was estimated to be ∼ 2.5 ps, which is very similar to that of T3Me in the same solvent. It was sug…
The method of electrical dislocation density measurement, which was successful in plastically deformed pure noble metals, is applied for the first time to dilute alloys, and the parameters for the electrical dislocation density measurement, i.e. the temperature dependence of the deviation from Matthiessen's rule and o…
Abstract Layered perovskite compound RbLa2Ti2NbO10 has been successfully characterized by the Rietveld analysis of powder X-ray diffraction pattern and lattice energy calculation. The RbLa2Ti2NbO10 represents a unique example of layered perovskite in which equal numbers of Ti4+ and Nb5+ cations were statistically dist…
Nuclear fuel can be fabricated and used in the form of microspheres (sphere-pac fuel). The heat transport mechanisms in fuel pins containing sphere-pac fuel are however very different from those in pellet pins. They are controlled not only by the thermal conductivity of fuel, cladding, and fill gas but also by particl…
Heavy-atom alkanethiolates (mercaptides), especially of lead, provide a series of sharp first-order lines for calibrating both wide- and small-angle X-ray diffractometers (WAXD and SAXS), out to at least 60 Å d spacing. There is no reliance on published data or on externally validated substances other than silicon sta…
Ultra-small-angle X-ray scattering by dislocations in single-crystal aluminum has been observed in situ as a function of plastic deformation. The scattering is strongly dependent upon sample orientation, with single dislocations, dislocation dipoles, and the dislocation distribution within walls each exhibiting distin…
A study is reported on phase transitions in the La 1− x Sr x MnO 3 system, both spontaneous and induced by a pulsed magnetic field of up to 250 kOe, accompanied by anomalies in magnetoelastic properties. The temperatures of the polaron (charge) and magnetic ordering, as well as those of structural transitions, are obs…
The method of optical enhancement by means of intersurface-reflection-excited resonance was applied to a single-pixel device filled with a fast-switching electroclinic mixture M68. A contrast ratio of 6.5: 1, which is sufficient for a spatial light modulator (SLM), has been obtained for an electric-field-induced twist…
A new procedure of recording both Hugoniot parameters and stress profile is proposed to study shock characteristics of polymers in 1 GPa stress region. The assembly consists of an in-material polyvinylidene fluoride (PVDF) stress gauge element and an optical prism pin. The PVDF gauge records the shock wave stress prof…
This work addresses the influence of the prepolymerization of the catalyst particle on the fluidized bed reactor for polyethylene production. The influence of prepolymerization on the temperature and concentration gradients throughout the reactor was studied. The results obtained through simulations confirm industrial…
Results are presented of a study dealing with an AlN–TiN composite material for high temperature applications. Hardness, microhardness, compressive strength, electrical resistance, and thermal conductivity of the material were measured at room temperature and flexural strength was measured at temperatures from 20 to 1…
Crystal structures of [Pd(NH3)2X2] complexes, where X = Br or I, diamminediiodo-/-dibromopalladium(II), have been studied by X-ray powder diffraction. The series consists of five complexes: cis-[Pd(NH3)2Br2] (I) [a = 13.3202 (7), b = 12.7223 (6), c = 7.05854 (3) A, Z = 8, space group Pbca], trans-[Pd(NH3)2Br2] (II) [a…