Materials Literature
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We studied the origin of a green photoluminescence (PL) in silica glass at about 2.25 eV using electron spin resonance. The 2.25 eV PL band (lifetime: ∼300 ns, full width at half maximum: ∼0.2 eV) appears strong in γ-irradiated high-oxygen content silica glass suggesting that this PL is associated with a large surplus…
Laurence Barker, , Andreas Weise, Alexander Schulz, Christiane Gebhardt, Brigitte Hirner, Hanjo Hellmann, Waltraud Schulze, John M. Ward, Wolf B. Frommer, SUT2, a Putative Sucrose Sensor in Sieve Elements, The Plant Cell, Vol. 12, No. 7 (Jul., 2000), pp. 1153-1164
Tinplate is used widely in the canning industry. Its passivation treatment involves mainly the use of chromium, and it is applied typically with the cathodic dichromate (CDC) procedure. The present study provided evidence by means of laboratory testing in aerobic and anaerobic conditions that the combination of an acr…
High porosity nanocrystalline Si thin films have been deposited using a high density plasma approach at temperatures as low as 100 °C. These films exhibit the same unique properties, such as visible luminescence and gas sensitivity, that are seen in electrochemically etched Si (i.e., porous Si). The nanostructure cons…
Abstract Biodegradable edible films can be made from corn protein, α‐zein. Pure zein films are cast from an organic solution of α‐zein. This report outlines the surface conditions of such pure zein films. First, the transition temperature, T t′ of the pure zein film was measured with a thermomechanical analyzer. T t w…
The one-dimensional structure of catena-poly[[bis(2,2′-bipyridyl-1κ2N,N′)-μ-cyano-1:2κ2N:C-dicyano-2κ2C-dinickel(II)]-μ-cyano-C:N], [Ni2(CN)4(C10H8N2)2]n, consists of infinite zigzag chains running parallel to the c axis. The chains are composed of paramagnetic [Ni(bipy)2]2+ cations (bricks; nickel on a twofold a…
Kozoite-(Nd), Nd(CO 3 )(OH), occurs in cavities and fissures of alkali olivine basalt exposed at Niikoba, Hizen-cho, Higashi Matsuura-gun, Saga Prefecture, Japan, in association with lanthanite- (Nd) and kimuraite-(Y). The crystal structure was refined by the Rietveld method in space group Pmcn; a = 4.9829(1), b = 8.5…
Single crystals of BaTiO(3) were grown by templated grain growth (TGG). TGG involves contacting a single crystal "template" to a sintered polycrystalline matrix, then heating the assemblage to a temperature that promotes the migration of the single crystal boundary through the matrix. In this investigation the propert…
This paper presents how to determine the thickness of the hysteresis ring of hysteresis motor using the finite element method combined with a vector hysteresis model. From the magnitude and direction of the magnetic field intensity, the magnetization of each ring element is calculated by the vector hysteresis model an…
X-ray photoelectron (XPS), ultraviolet photoelectron (UPS), and Auger electron spectroscopy (AES) spectra are presented from epitaxial, single-crystal transition-metal (TM) nitride (ScN, TiN, VN, and CrN) layers, that were grown in situ in an ultrahigh-vacuum (UHV) magnetron sputter deposition system attached to the a…
Recently, amphiphilic monomers that are capable of forming lyotropic liquid crystalline phases have been utilized in a variety of applications including emulsion polymerization, development of nanocomposites, and the formation of polymeric surfactants. A new class of fluorinated amphiphilic monomers that exhibit lyotr…
The combination of anionic polymerization and controlled chlorosilane chemistry made possible for the first time the synthesis of model 3-miktoarm star terpolymers of styrene (PS), isoprene (PI) and 2-vinylpyridine (P2VP) (3μ-SIV). The morphology of a nearly symmetric 3μ-SIV star terpolymer, was also studied. From the…
The effect of a magnetic field on the electrical polarisability of a shallow donor placed at the centre of a semiconductor spherical microcrystallite is studied in the framework of the effective mass approximation and using a variational approach. Variations of the polarisability of the system versus the crystallite r…
ABSTRACT Zein, extracted from underutilized corn gluten meal may serve as an alternative starting material for fabrication of biodegradable packaging. Zein plasticized with oleic acid may be formed into flexible and water‐resistant sheets. Our objective was to investigate the effect of plasticization on thermal behavi…
We have studied the influence of radio frequency (RF) power on material properties of hydrogenated amorphous carbon ( a -C:H) films prepared by RF plasma-enhanced chemical vapor deposition (CVD). The RF power has a significant impact on film properties such as electron spin resonance (ESR) spin density, the optical ba…
This paper describes a model for simulating the behavior of soft MnZn. This model takes into account both hysteresis and dynamic phenomena. The temperature is introduced using behavioral laws. In fact, the following model requires only few parameters. It estimates iron losses and characteristics, such as B(H), /spl ph…
The kinetics of nucleation and crystal growth in a Li 2 B 4 O 7 glass were investigated using differential thermal analysis (DTA) and differential scanning calorimetry (DSC). This melt forms a glass even when it is cooled at a very slow rate (2 K/min). The temperature range of nucleation was determined by comparing th…
This paper describes the development of a novel shape memory alloy (SMA) actuator with high frequency responses. By applying Peltier modules as heat pumps for heating and cooling of SMAs, the actuator is expected to have higher frequency responses comparing with conventional ones. Thermomechanical properties of the ac…
Amphiboles were synthesized at 1.5 kbar P H₂O and 850 °C along the join pargasite-fluoropargasite. Structural variations in the amphibole as a function of F have been characterized by a combination of SEM-EDS, X-ray powder diffraction, and infrared spectroscopy. SEM-EDS analyses show that, for increasing F in the syst…
Abstract The ac magnetic measurements on an organic metal, κ-(BETS)2FeCl4 down to 60 mK revealed successive antiferromagnetic and superconducting phase transitions at about 0.65 K (≈TN) and 0.1 K (≈TC), respectively. These transitions correspond to the similar transitions in the Br-analogue, κ-(BETS)2FeBr4 but the tra…