Materials Literature
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Preface. 1. Thermodynamics of Niobium Chlorides and Mixtures with Alkali Chlorides M. Gaune-Escard. 2. Interrelation between the Composition and Structure of Metaphosphate Polyhedra of Molybdenum and Tungsten in the Case of Electro-deposition of Metals and their Alloys N.I. Buryak, et al. 3. High Performance Coating o…
In this note we apply some theoretical predictions that arise in the mean field framework for a large class of infinite range models to structural glasses and we present a first comparison of these predictions with numerical results. 1 Introduction In recent years some theoretical progresses in our understanding of gl…
A review is presented of the current research and development of shape-memory materials, including shape-memory alloys, shape-memory ceramics and shape-memory polymers. The shape-memorymaterials exhibit some novel performances,such as sensoring (thermal, stress or field), large-stroke actuation, high damping, adaptive…
453-623Kの広い温度範囲で高温・高圧のメタノールによるポリエチレンテレフタレート (PET) の加溶媒分解反応の速度定数を決定した. その結果, 臨界温度 (512.6K) 以下のメタノールによる分解の速度定数と, 臨界温度以上のメタノールによる速度定数のArrheniusプロットを同一直線で表すことができることから, 両領域のメタノール間の反応性の差はおもに温度によるものであり, 劇的な変化がないことが明らかになった. 一方, 今回検討した臨界温度以上のメタノールによるPET分解反応に比べて従来の約453Kでの液体メタノールを用いる分解反応速度がかなり遅い理由は, 従来法ではメタノールの蒸気圧が2.7MPaと低く, さらに…
Dc magnetization and ac magnetic susceptibility have been measured in the temperature range 80–300 K for La0.7Ca0.3MnO3 , synthesized by the conventional ceramic and the low temperature combustion methods and annealed at different temperatures. Temperature dependence of the dc magnetization and the ac susceptibility i…
From surface tensions of liquids and Lifshitz-van der Waals (LW) and Lewis acid-base (AB) surface tension components and the AB electron-acceptor γ+ and electron-donor γ˙ parameters determined by contact angle (θ) measurements (using the Young-Dupré equation for polar systems), the interfacial work of salvation (Wst)…
Tranilast, N-(3,4-dimethoxycinnamoyl) anthranilic acid, a widely used antiallergy drug in Japan, has been shown to inhibit transforming growth factor-beta1 release from fibroblasts and reduce collagen synthesis in keloid cells. In the present study, we have investigated the effect of this drug on cardiac hypertrophy i…
Pendimethalin, N-(1-ethylpropyl)-3,4-dimethyl-2,6-dinitrobenzenamine, is a potent herbicide that exists in two differently coloured polymorphic crystal habits. Triclinic pendimethalin I (P) is the orange-coloured thermodynamically stable form, whereas monoclinic pendimethalin II (P21/c) is a bright-yellow metastable f…
This work reports on mesomorphic thermochromism caused by metal centres leading to visualization of van der Waals interactions. We succeeded in obtaining columnar liquid crystals exhibiting very interesting thermochromism by introduction of long chains into disk-like bis(glyoximato) d8 metal(ii) complexes. These long-…
The synthesis and first hyperpolarizabilities of a series of isoquinolines and isoquinolinium salts, and also thienopyridines, thienylpyridines, and the corresponding pyridinium salts, determined by hyper-Rayleigh scattering in solution at 1064 and 1300 nm, are reported. These chromophores exhibit markedly high β valu…
The gene encoding an extremely stable inorganic pyrophosphatase from Sulfolobus sp. strain 7, a thermoacidophilic archaeon, was cloned and sequenced. An open reading frame consisted of 516 base pairs coding for a protein of 172-amino acid residues. The deduced sequence was supported by partial amino acid sequence anal…
Facile syntheses of the meso-tetra-p-tolylporphyrin (TTP) complexes trans-(TTP)Ti(THF)(2) (1), (TTP)Sn (2), and trans-(TTP)V(THF)(2) (3) are achieved through homogeneous reduction of high-valent precursors using NaBEt(3)H. The composition of the new compound trans-(TTP)Ti(THF)(2) was determined by spectroscopic and ch…
Molecules of S 2 are sorbed by dehydrated fully indium exchanged zeolite A from S(g) at 623 K. The crystal structure of dehydrated In 8 Si 12 Al 12 O 48 ·(In) 0.75 (S 2 ) ( R 1 = 0.053, R 2 = 0.050, and a = 12.090(2) Å) has been studied by single-crystal X-ray diffraction methods at 294 K using the space group Pm 3̄ m…
Regioselective bromination of 2-nitro-5,10,15,20-tetraphenylporphyrin, cyclopropa[b]chlorins, or trans-bis(dicyanomethyl)chlorins occurs in the pyrrole subunit opposite the substituted ring; exhaustive bromination of functionalized tetraphenylchlorins provides a route to dodecasubstitued dihydroporphyrins for the firs…
A series of samples of MoO3 and/or ZnO supported on tetragonal ZrO2 (t-ZrO2) have been investigated by laser Raman spectroscopy and XRD. For these supported binary-oxide systems, the loading sequence of the oxide and the calcination temperature have notable effects on the interactions of the oxides and support and hen…
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The crystal structure and absorption spectra (IR, UV/VIS) have been determined for Na0.5H5.5[Nd2(ttha)2]· 7.5NaClO4·16.83H2O (H6ttha = triethylenetetraaminehexaacetic acid). The structure consists of the complex dimer, perchlorate anions, sodium cations and water of hydration. Both neodymium(III) ions are nine-co-ordi…
We have used resonant reflection mode Fabry–Perot microcavities (RFPM’s) to determine linear optical and electro-optical properties of poled nonlinear optical polymers (NLP’s). Measured reflectances from angular scans of RFPM’s have been analyzed with an electromagnetic plane-wave multilayer analysis that took into ac…
The synthesis and characterization of a series of tetrathiafulvalenes (1–3) bearing a different number of 4′-cyanobiphenyl-4-yloxy side groups is reported. Compound 3 exhibits a nematic and a smectic A mesophase. In the smectic A phase a peculiar local biaxial order due to the unconventional molecular structure is pro…
The energy gap dependence of the rate of electron transfer has been revealed for donor–acceptor supramolecular assemblies composed of zinc–tetraphenylporphyrin and a series of spacer–acceptor conjugate molecules which are structurally similar but with varying redox potentials.