Materials Literature
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A series of porphyrins strapped and capped by benzene and amidobenzene rings have been prepared. O(2) and CO bindings to their iron(II) complexes have been examined, and the role of hydrogen-bonding in stabilizing O(2) binding has been measured. Each comparison between the benzene ring (no H-bonding) and the amidobenz…
In this paper results are reported on the influence of strain rate and shock loading on the deformation and fracture response of a 6061-T6 Al–50 vol. % Al2O3 continuous fiber-reinforced composite as a function of composite orientation. The stress-strain response was found to vary substantially as a function of loading…
The electrolytic separation factor (S factor) of hydrogen isotopes for platinum was measured by means of quantitative mass analysis. The S factor was 5.0±0.2 at 298 K in sulfuric solution. The value was discussed on the basis of the transition state method. The temperature effect on the S factor was observed and the a…
An aspect is presented to analyze the interrelation among the conventional tests of the bending rigidity of textile fabrics, such as cantilever, Clark, heart-loop methods, etc., which enables it to compare and estimate the errors and applicable ranges of these methods. A strip of fabric is simulated by an elastic slen…
Single crystals of (Ba0.96-xLnxSr0.04)TiO3 (Ln=La, Gd) were grown over a composition range of x=0.001 to 0.03. Electrical resistivities of the single crystals were measured by the DC four-probe method. The temperature dependence of resistivities of these crystals changed from semiconductive to metallic at the Curie te…
The relationship between the grain growth and the wettability of grains by a liquid phase was discussed on the basis of the observation of the microstructure of La-doped SrTiO3 ceramics and the measurement of the contact angle of the liquid phase (Sr1Ti3.206La0.328O7.904) on the SrTiO3 substrate using the sessile drop…
Degradation of positive temperature coefficient of resistivity (PTCR) properties of semiconducting BaTiO3 ceramics that were annealed in reducing gases was studied from a mechanistic viewpoint mainly by measuring the electrical and dielectric properties, using reflectance and ESR spectroscopies, as well as by gas anal…
純銅と種々の合金銅において, 酸化膜の基材に対する密着性を, 300, 350, 400℃の3つの酸化温度につき, 酸化膜の剥離試験, XRD, SEM, TEMおよびAESによって調べた。表面粗さを統一した場合, 全試料の酸化膜の密着性は, 酸化温度の上昇とともに低下した。タフピッチ銅が最も厚い密着性の良い酸化膜を生じ, 主してCu2Oが観察された。タフピッチ銅の表面粗さを変化させた場合, 膜の密着性は表面粗度からは傾向が把握できなかったが, CuOの生成量の増加とともに低下した。Cu-Ti合金の酸化膜は膜の密着性が劣り, Tiの増加によりCuOがより多く観察されるようになった。CuOの生成が酸化膜の密着性の低下に大きく関与して…
Rod-shaped crystals of apocrustacyanin C1 have been grown under microgravity on the International Microgravity Laboratory (IML-2) NASA space shuttle mission using the vapour-diffusion set-up of the Advanced Protein Crystallization Facility (APCF). The crystals obtained under microgravity are compared with crystals gro…
AbstractThe aqueous solubility of thiacetazone was enhanced in the presence of different concentrations of isoniazid. The nature of this solubilization was investigated by measuring some physicochemical properties of isoniazid in water. Slight surface activity and conductance were observed. Osmotic pressure and partit…
The influence of the type and concentration of carbon black on the penetration rate, p, and diffusion coefficient, D, of kerosene in SBR rubber composites were investigated. The penetration rate, p, decreases with the FEF carbon black concentration owing to the formation of carbon agreggation. Meanwhile, p has a peak…
The causes and mechanism of hygroscopicity of binary ultraphosphate glasses are difficult to study. This is due, in particular, to the formation of a thin layer of partially hydrolyzed glass with physisorbed water. 1H MAS NMR is more suitable than IRTF spectroscopy to investigate very hygroscopic glasses. In absence o…
Le matériel original de Gomphonema rhombicum M. SCHMIDT, 1904 a pu être identifié et examiné en microscopie optique. L'observation de quelque 210 individus a donné lieu à une diagnose et une illustration photographique de l'espèce. Un lectotype est proposé parmi les isotypes répartis dans diverses collections.
Abstract The prospects for developing efficient molecular devices for all‐optical switching are discussed on the basis of measurements of the second molecular hyperpolarizability coefficient, γ, responsible for third harmonic generation. More than twenty structurally different organic compounds comprising organic meta…
MoO2(acac)2 has been used as a precursor for the one-step MOCVD of silica- and zirconia-supported MoO3. Pure films were obtained by suitable control of the deposition parameters. The films were characterised by UV-VIS spectroscopy, XRD, SEM, wavelength-dispersive X-ray fluorescence analysis and XPS. Silica-supported M…
The structures of the electronic energy bands of LiB3O5, Li2B4O7 and KBe2BO3F2 solid compounds, containing both ionic and covalent bonds, have been calculated using the INDO/S method first, and the dynamic refractive indices and frequency-dependent second susceptibilities have been obtained in terms of INDO/SCI follow…
The authors investigated the in-situ processing temperatures and effects of various formulation additives on the formation of ultraviolet (UV) excitable chromophores in the thermal lamination and curing of ethylene-vinyl acetate (EVA) encapsulants for solar cells. A programmable, microprocessor-controlled, double-bag…
The solubilities of o -chlorobenzoic acid, p -chlorobenzoic acid, o -nitroaniline, and p -nitroaniline in dimethylformamide (DMF) + water at different compositions are reported at 303 K. At this temperature, p-chlorobenzoic acid is more soluble than o-chlorobenzoic acid in DMF + water with the difference in solubiliti…
Cu–Al–Ni shape memory alloys present a minimum in their elastic modulus during the martensitic transformation, and the values in both the martensite and high temperature β-phase, follow the same trend. The addition of Ti, as grain refiner, produces χ-phase precipitates which substantially modify the elastic modulus pr…
新しいアモルファス分子材料の創製を目指して, 新規なπ電子系分子1, 3, 5-トリ (N-カルバゾリル) ベンゼン (TCB) を設計・合成し, そのガラス形成ならびにガラスからの緩和過程を検討した. その結果, TCBは, 溶融サンプルを冷却することにより, 容易にガラスを形成することを見いだした. CPKモデルから, TCBは, 三つのカルバゾール環が中心ベンゼン環の平面から著しくねじれた非平面構造を有していることが示唆され, このことがガラス形成を容易にしていると考えられる. TCBガラスは, カルバゾール環を含まない類似化合物1, 3, 5-トリス (4-メチルフェニルフェニルアミノ) ベンゼンのガラスと比較して, 格段…