Materials Literature
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Tensile strength of 6061–T6 aluminum alloy is presently investigated in the wide ranges of temperature and strain rate. At high strain rates a split-Hopkinson pressure bar method is adapted. Temperature and strain rate effects on the stress strain relations are clarified and can be understood in connection with the th…
The interaction of Co(acac)2 and Ta(OMe)5 in dry toluene led to formation of crystalline [Co2Ta2(acac)2(OMe)12] 1 and [Ta(acac)(OMe)4] 2 complexes. If the starting material is not completely water-free the products obtained are [Co4(acac)6(OMe)2(MeOH)2] 3 and Co(acac)2·2MeOH 4 due to hydrolysis of Ta(OMe)5 producing f…
Recently, the reaction of composite pellet consisting of the iron ore and carbonaceous materials such as coal, char and coke was investigated. The fast reaction rate and relatively low starting temperature were reported by many researchers. In such a reaction condition, the mechanism of reaction will be changed during…
The development of injectable microspheres for sustained drug delivery to the arterial wall is a major challenge. We demonstrated the possibility of entrapping an antiproliferative agent, taxol, in poly(ethylene glycol) (PEG)-coated biodegradable poly(lactic acid) (PLA) microspheres with a mean diameter of 2-6 microm.…
Using the Walker 256 model for carcinosarcoma-bearing rats, we intravenously administered 5 polysaccharide carriers with various molecular weights (MWs) and electric charges and tested for their plasma and tissue distribution. Two carriers, carboxymethylated-D-manno-D-glucan (CMMG) and CMdextran (CMDex), showed higher…
A new thermoluminescence glow curve deconvolution (GCD) function is introduced which accurately describes first order thermoluminescence (TL) curves. The new GCD function is found to be accurate for first order TL peaks with a wide variety of the values of the TL kinetic parameters E and s. The 3-parameter Weibull pro…
Note: All chapters end with a section of References. Preface INTRODUCTION OF LIQUID CRYSTALLINE MATERIALS History of development of liquid crystalline materials Classification and structure of liquid crystalline materials: Classification and structure of LCs, Classification and structure of LCPs Liquid crystal texture…
Magnetic investigations of organic conductors, β′-type [Pd(dmit)2]2, have been performed by Electron Paramagnetic Resonance (EPR) measurements. We found that most of them except one compound underwent antiferromagnetic transitions. Although they are isostructural with little differences in lattice parameters, their sp…
© 2001 The Electrochemical Society. All rights reserved.
This paper presents the adaptation of the Preisach model, originally developed for magnetic hysteresis, to describe mathematically the hysteresis in the resistance-temperature characteristics of vanadium-dioxide (VO/sub 2/) thin film radiation sensors. The necessary and sufficient conditions for the applicability of t…
Luminescence, excitation of luminescence and absorption spectra of europium capronate crystals as well as vibrational IR and Raman spectra at 4.2, 77 and 293 K were obtained. Magnetic susceptibility measurements were carried out down to 1.7 K. Correlations between the spectral and magnetic properties and details of th…
Continuous efforts are directed at developing improved electrical steels with lower iron losses for energy-efficient transformers and motors. The core losses can be limited by insulating coatings, and various types of coatings have been developed for application to both fully processed and semiprocessed electrical ste…
A new polynuclear copper(II) complex [Cu7(OH)6Cl2(pn)6(H2O)2](C(CN)3)4Cl2 with hydroxo-bridging ligands has been prepared; the centrosymmetric cluster cation can be described as two Cu4O3Cl distorted cubane units sharing one copper cation.
Ab initio [MP2(fu)/6-31G**, MP2(fu)/6-311G**] and DFT [B3LYP/6-31G**, B3LYP/6-311G**] calculations predict stable planar structures of the nonclassical compounds BB6(CH)3 and BB6X2− (X = NH, O) containing a hexacoordinated central boron atom.
The formation of carbon-based mixed materials is unavoidable on the plasma-facing components (e.g. first wall and divertor) of fusion devices when carbon is used together with other materials. On the surfaces of these components very different conditions with respect to particle and energy impact occur. To predict the…
Single-crystal samples of taurine, NH3C2H4SO3, were studied by Raman spectroscopy in a diamond-anvil cell up to pressures of 5.6 GPa. From the analysis of the results we observed that the crystal undergoes a phase transition at about 0.7 GPa. The transition is accompanied by the appearance of a phonon in the external…
The polytopic ligands 2poap and po2p have a linear disposition of coordination pockets suitably disposed to bind metal ions in close proximity and produce linear trinuclear copper(II) complexes. The complexes [Cu3(2poap − 2H)(CH3CO2)4]·3H2O (1), [Cu3(2poap − 2H)(H2O)(DMF)3(CH3OH)2](BF4)4 (2), and [Cu3(po2p − H)2(H2O)2…
At a polymer-solid interface, an inorganic adherend may influence the structure and/or chemistry of the polymer in the near-interface region. This region between the adherend and the homogeneous polymer is referred to as the interphase. While there is general agreement that interphases exist, extensive debate revolves…
Grain refining mechanisms of Fe– and Mn–free high-purity Mg–Al alloy ingots and the influences of a small addition of Fe or Mn on their cast structures were investigated. In order to prepare the alloy, a distilled pure magnesium (< 99.99%) and a commercial high-purity aluminum (99.99%) were melted, and given amounts o…
The power absorption of Co-rich metallic glasses in the shape of ribbons and microwires has been measured in the microwave frequency range. The technique employed consists of replacing the dielectric of a coaxial transmission line by the amorphous sample to be measured. The ferromagnetic resonance frequency of the mic…