Materials Literature
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The oxidation of pyridines using a combined oxidant of hydrogen peroxide and benzonitrile catalysed by a basic hydrotalcite, Mg10Al2(OH)24CO3, gave high yields of the corresponding pyridine N-oxides. This solid hydrotalcite catalyst was easily separated from the reaction mixture and could be reused with retention of i…
The solubility products of the calcium salts of two polyhydroxy ligands (PHL), isosaccharinate (ISA) and gluconate (GLUC), were measured. Solubility products of log <em>K</em><sub>s,o</sub> = –6.22 ± 0.03 at <em>I </em>= 0 and <em>T</em> = 20 ± 1°C for Ca(α-ISA)<sub>2</sub>, and log <em>K</em><sub>s,o</sub> = –3.54 ±…
Stable functional complementary clusters, i.e. of the electrophilic and nucleophilic type, can be ‘added’ resulting in the planned formation of the related reaction products: the high-yield synthesis of the crystalline compounds [Me2NH2]10- [{(SiW11O39)Mo3S4(H2O)3(µ-OH)}2]·20H2O 1 and [Me2NH2]14[{(P2W17O61)Mo3S4(H2O)3…
A novel method of preparing CdS nanoparticle-modified electrodes is described and a relationship between CdS particle size and the photoelectrochemical properties of such electrodes demonstrated.
The sequential addition of 4-cyanobiphenyl moieties to a silyl core unit results in a modification of the molecular shape of the molecules from rod-like to cross-shaped. The variation of molecular size and shape determines the nature (interdigitated SmAd or monolayer SmAl) and the stability range of the liquid-crystal…
A polyacrylonitrile (PAN)‐based polymer electrolyte containing lithium perchlorate, propylene carbonate, and cascade nitrile ( ED 4 CN ) was prepared, and its conductivity was measured at various temperatures. The conductivity of the polymer electrolyte, ( PAN ) 20 [ LiClO 4 ] 10 ( ED 4 CN ) 2 ( PC ) 23.6 , was 1.05 ×…
The application of the energy dispersive X‐ray diffraction (EDXD) technique to in situ structural measurements on battery materials is shown for the first time. EDXD may present a promising alternative for this kind of measurement to the traditional diffractometric technique, even when the synchrotron radiation is use…
Optically stimulated luminescence (OSL) dosimetry measurements using Cu+-doped fused quartz are reported. The dose response to 60Co ? rays is measured over the range of doses from 2.6 x 10-6 to 5.2 x 10-2 C.kg-1 (10 mR to 200 R). The fading behaviour of the OSL traps and the thermoluminescence (TL) traps are found to…
The Periodic Intensity Distribution (PID) analysis of the diffraction pattern of mica polytypes can be applied to single crystals. Since micas often appear as twins, general criteria are established to investigate the presence of twinning. These criteria are derived through a geometrical approach based on the general…
Magnetic and transport properties of the series ( x = 0, 0.01, 0.03, 0.05, 0.1, 0.3, 0.5, 1.0) have been investigated. It was found that with increasing Co content, the Curie temperature decreases, while the spin glass transition temperature decreases first then increases. As for the sample with x = 0.3, the relation…
Rare-earth ultraphosphates, RP5O14, were synthesized, and their mechanochemical effects due to grinding were investigated by using TG-DTA, XRD, FT-IR and SEM. When the ultraphosphates were ground, their XRD peaks became smaller, their particles were flocculated to be paste, and their P-O-P bondings were cleaved to for…
The effect of fibrinogen and high molecular weight kininogen on bacterial adhesion to functionalized polyurethanes was studied. Glass slides were coated with different polyurethanes, including Pellethane, sulfonated Pellethane, phosphonated Pellethane, a zwitterionic phosphonated polyurethane, and quaternized amine po…
A mean-field theory is introduced to describe nematic-isotropic phase transitions and phase separations in binary mixtures of a liquid-crystal molecule and a semiflexible polymer chain. On the basis of the Onsager model for excluded volume interactions, the Maier-Saupe model for orientational-dependent attractive inte…
Titanium-containing hydrophobic silica with a pore volume and pore sizes in the range of aerogels was prepared by silylation before drying of well-dispersed mixed oxides obtained via a sol-gel method; it showed remarkable properties as a catalyst in the epoxidation of styrene with ButOOH.
Diatom zonal key species are identified in the samples from the Morozaki (the Toyohama, Yamami and Utsumi Formations), Iwamura (the Toyama Formation) and Tomikusa (the Awano and Yonekawa Formations) Groups. These assemblages are characterized by the abundant occurrences of Kisseleviella carina and Stephanopyxis spp. T…
Alpha-Si3N4 powder mixed with SiO2 and Ln2O3 (Ln=La, Gd or Yb) was heat-treated at 1750-1900°C. After removing the glassy phase, the morphologies of β-Si3N4 crystals were quantitatively analyzed. The aspect ratios of β-Si3N4 crystals doped with different lanthanide oxides increased in the order of La2O3>Gd2O3>Yb2O3 at…
New halide-substituted cluster anions [Cd10S4X4(SR)12]4– (R=Ph, X = I, 2a; R = p-MeC6H4, X = I, 3a or Br, 3b) of the [Cd10S4(SR)16]4– family have been prepared and characterized; investigations of their luminescence show that the introduction of the halide groups produces red shifts and significant enhancements in the…
The 2.5 A crystal structure of the full length human placental isoform of the Gly12 to Val mutant Cdc42 protein (Cdc42(G12V)) bound to both GDP/Mg2+ and GDPNH2 (guanosine-5'-diphospho-beta-amidate) is reported. The crystal contains two molecules in the asymmetric unit, of which one has bound GDP/Mg2+, while the other…
The influence of polyurethane compositions and fabrication conditions on the pore morphology and mechanical properties of microporous segmented polyetherurethane (SPEU) grafts, which were produced by the coagulation technique, were carefully investigated in this article. SPEU resins based on polytetramethylene oxide (…
Recent experimental results on the deformation field of single crystal CuNiAl shape memory alloys (SMA) by using Moire´ interference technique are reported and two kinds of austenite-martensite (A-M) interfaces with different deformation features are identified. The experimental discovery questioned the invariant plan…