Materials Literature
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Hydrogenolysis of chloroethene (vinyl chloride, VC) has been investigated in a tubular-flow reactor at atmospheric pressure between 872–1085 K. Ethene, ethyne, and HCl are major initial products of reaction. Hydrogen-atom addition to the substituted end of VC yields C2H4 after loss of a chlorine atom from the radical…
The present paper is a brief overview of aspects of the damaging effects of radiation on nuclear plant components manufactured from organic polymers. The paper briefly mentions some general nuclear plant applications of polymers, describes how the properties of polymers are affected by radiation, outlines some of the…
Минимальный хаос, стохастическая паутина и структуры с симметрией типа "квазикристалл", Заславский Г.М., Сагдеев Р.З., Усиков Д.А., Черников А.А.
The thermal decomposition of pyrite has been studied by combining thermogravimetric (t.g.) and microscopic techniques. Predictor–corrector methods, coupled with screen graphics, were used to solve the differential equations representing kinetic models of t.g. data. Kinetic conclusions from t.g. data are in good agreem…
Numerical simulation of a wide range of physical phenomena typically involves enormous amounts of computation and, for scores of practical problems, these simulations cannot be carried out even on today's fastest supercomputers. The economic and scientific importance of many of these problems is driving the explosive…
Expressions are presented for the calculation of the magnetic field components due to toroidal current-carrying conductors of rectangular cross section, with angular length equal to 2 pi radians and constant current density. The expressions contain complete elliptic integrals of orders I and II. The elliptic integral…
The pentanuclear cluster [Au3Cu2(C2Ph)6]– was obtained from the reaction between [{Au(C2Ph)}n] and a mixture of [Au(C2Ph)2]– and [{Cu(C2Ph)}n]. Its structure is described. The same cluster has been synthesized in a stepwise manner starting with [Au(C2Ph)2]– through the binuclear complex [Au2(C2Ph)3]– and the trinuclea…
The transmittance spectra of twisted states of surface stabilized ferroelectric liquid crystal cells were measured under a polarizing optical microscope. It was found that the two twisted states give different spectra, as expected by an apparent color difference. There were two cases; in one case the two spectra inter…
On etudie la microstructure, les proprietes mecaniques et les performances comme outils de coupe de composites Al 2 O 3 −TiC presses a chaud isostatiquement et uniaxialement
Abstract Synthese und Eigenschaften von Metall(II)‐ und/oder Metall(III)‐bis Chelaten des 1,3‐Dithiol‐2‐on‐4,5‐dithiolats (dmid) vom Typ A n [M(dmid) 2 ] (A = Bu 4 N + , Ph 4 As + ; M = Zn, Cd, Hg, Cu, Ni, Pd, Au, Fe; n = 1, 2) werden beschrieben. Anhand der IR‐, 13 C‐NMR‐, EPR‐Spektren und Cyclovoltammogramme dieser…
Abstract Graft polymerization of acrylamide onto rice starch was investigated under different conditions using potassium persulphate, benzoyl peroxide or potassium permanganate as initiator. This has led to establishment of the most appropriate grafting conditions for each of these initiators. Under these conditions g…
Over the past few years, a number of techniques have evolved for detecting discharges in the insulation systems of electrical machines by measuring the discharge currents flowing at the machine terminals. The propagation of these currents through the winding, from the discharge site to the terminals, is influenced by…
The synthesis and characterisation of gold(II) complexes with o-aminobenzenethiol is reported. The e.s.r. results indicate that the highest occupied molecular orbital has appreciable contribution from the sulphur donors of the ligands. It is the first time that binuclear gold(II) complexes giving well resolved seven-l…
A new genus Actinokineospora is described. It is characterized by forming chains of zoospores originating from aerial mycelium, and has type IV/A cell walls and a type PII phospholipids pattern. The major menaquinone is MK-10. No mycolic acids are present. The guanine-plus-cytosine content of the deoxyribonucleic acid…
The initial adsorption, structural transition, and polymeric growth of 1‐octyne‐3‐ol on iron electrode from sulfuric acid solutions have been examined by using time‐resolved in situ automatic ellipsometry. The adsorption occurs in two different configurations, flat and partly upright. The structural transition of the…
Mechanical properties of SiO2-Al2O3 ceramics were studied in relation to the chemical composition. Raw powders of the composition ranging from 60 to 78wt% Al2O3 were synthesized by the spray pyrolysis method and sintered at 1650°C for 4h. The room temperature flexural strength and fracture toughness of the specimens s…
Measurements of the reversible component of magnetization or reversible (backward) differential permeability made on 1% Mn pipeline steel at numerous points around major and minor hysteresis loops and on initial and anhysteretic curves are described. It is found that the reversible component of magnetization is a sing…
Abstract In the search for the causes of diatom assemblage distribution, a combination of two multivariate analyses has been used. Principal component analysis and canonical correlation analysis have allowed us to find suitable relationships between biological and physicochemical parameters. As a result, water salinit…
Abstract A technique for characterization of polymer blends by low voltage scanning electron microscopy is described. The method allows observation of the distribution of phases in a blend due to good topographical and compositional contrast. This is possible because of lower beam penetration and high secondary emissi…
A high-resolution temperature-concentration diagram and detailed differential scanning calorimetry data near an expected $\mathrm{s}\mathrm{m}\mathrm{e}\mathrm{c}\mathrm{t}\mathrm{i}\mathrm{c}\ensuremath{-}{A}_{1}\ensuremath{-}\mathrm{r}\mathrm{e}\mathrm{e}\mathrm{n}\mathrm{t}\mathrm{r}\mathrm{a}\mathrm{n}\mathrm{t}\p…