Materials Literature
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The influence of mixed anaerobic bacterial biofilms comprising Desulfovibrio vulgaris and Desulfovibrio desulfuricans and pure Vibrio alginolytics aerobic biofilms on cathodically protected AISI 304L stainless steel (SS) coupons was studied by means of epifluorescence microscopy, scanning electron microscopy (SEM) and…
The liquid crystal orientation on a poly(vinyl cinnamate) or poly(vinyl 4-methoxy-cinnamate) coated solid substrate exposed to linearly polarized UV light has been studied. The angular distribution of the polymer side chains and the photoreaction products was derived as a function of exposure time using a simple assum…
Cadmium titanate, CdTiO3, was prepared by the sol–gel technique in bulk and in thin film form. The thermal evolution of the gels and the phase changes were studied by thermo- gravimetric analysis (TGA), X-ray diffractometry (XRD) and Raman and energy-dispersive (EDS) spectroscopies. The morphology of the samples was o…
The Rayleigh–Plesset equation is the basis of most theoretical analyses of bubble dynamics. Surprisingly, experiment and theory do not agree on the spatial location and the value of the periodic driving pressure. In the experiment the driving pressure is located near the bubble, whereas, the theory assumes that the dr…
The dc conductivity, σ, of As2S3 glasses, pure and doped with Ag up to 1.0 at%, and As2S2.82 glass have been measured. Conduction behavior of As2S2.82 glass that contains supplementary As–As bonds was nearly the same as that of As2S3 glass. By introducing 0.1 at% of Ag into As2S3 glass, the dc conductivity markedly in…
All articles of this category Oxidation of 3,5,5-trimethylcyclohex-3-en-1-one (1) with molecular oxygen catalyzed by metal phthalocyanines (Pc) and 5,10,15,20-tetraphenylporphyrins (TPP) including Mn(II), Mn(III), Fe(II), Fe(III), Co(II), Cu(II), and Ru(II) to 3,5,5-trimethylcyclohex-2-ene-1,4-dione (2) was studied. T…
We report the discovery of superconductivity in SnSe with T c around 4.5 K at pressures exceeding 58 GPa. It is conjectured that the high-pressure superconducting modification has the CsCl structure.
Thermoelectric power, electrical resistivity, and Hall effect of p-type Bi2—xSnxTe3 (0 ≤ x ≤ 0.030) single crystals have been measured in the temperature range 4.2 to 300 K. By doping Sn atoms into the host Bi2Te3 lattice, enhancements in the thermopower and resistivity are observed in the intermediate temperature ran…
An understanding of the atomic structure at internal interfaces is of crucial importance for the electronic and structural properties of most advanced materials. Here, we present a detailed study of the atomic structure at a [001] tilt grain boundary of σ5(210) in Tio 2 (rutile). Z‐contrast imaging is used to obtain a…
The formation of hydrated electrons in neutral aqueous ultrasound-exposed solutions has been postulated previously, and several arguments were presented in favor and against their existence. In this work we use a sensitive method for detecting the presence of hydrated electrons in argon-saturated water exposed to 50 k…
The fluctuation theory indicates that the isotropic light scattering loss of amorphous polymer glass, which is used as a material for polymer optical fiber, decreases with the decrease in isothermal compressibility β and refractive index. In order to prepare low light-scattering-loss polymer glass, it is necessary to…
Wetting and brazing studies of sputtering‐deposited, submicrometer thin film filler metal in an Ag—Cu—Ti/Al 2 O 3 system were performed. The interfacial reaction layer between the filler metal and Al 2 O 3 was investigated. It is possible to make a brazing joint even with a reaction layer of less than 100 nm thickness…
Abstract Utilizing high-resolution transmission electron microscopy (TEM), energy-dispersive spectroscopy (EDS) and X-raydiffraction (XRD) techniques, we have studied the transition from shallower smectite-rich mudrocks to deeper illite-rich mudrocks in Pliocene-age turbidite sediments from the northern Gulf of Mexico…
Thin layers of grafted polymer chains were produced by ultraviolet light-induced graft polymerization of a hydrophilic monomer, methacryloxyethyl phosphate, onto the Ar plasma-pretreated film surface of high-density polyethylene. The hydrogen-bonding interactions in the grafted polymer and the wettability of the graft…
‐based perovskites are of interest as cathode material for the development of advanced solid oxide fuel cells operating at temperatures significantly lower than 900°C. The compatibility of the selected materials is necessary to guarantee long‐term operation of a solid oxide fuel cell. Systematic investigations on the…
Starting from α-tetralone and maleic anhydride, novel AB-type amino anhydrides 3 and 5 were synthesized in good yields and obtained in high purity without self-condensation. The tetrahydro[5]helicene monomer 3 could be readily polymerized in m -cresol to give polyimide 8 with high molecular weight. Although direct pol…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTHost−Guest Complex Dependent Regioselectivity in Substitution Reactions of Chlorocyclotriphosphazene-Containing PNP-Crowns with AlkylenediaminesKrystyna Brandt, Iwona Porwolik, Mariola Siwy, Teobald Kupka, Robert A. Shaw, David B. Davies, Michael B. Hursthouse, and Geo…
The diffusion profile of small helium bubbles along grain boundaries in in-situ aluminium has been examined by electron microscopy observation. It was found that bubbles moved two-dimensionally in the general grainboundary interface with a misorientation about the axis [122]. The occurrence 2 * ) ( P R t probability,…
This paper presents a generalization of the unidimensional deformation equation based on the van Wyk theory. The derivation considers the effect of uncompressed areas between contacting fibers. Theoretical results are verified by the experimental work of Baljasov. The solution is extended to cover bidimensional deform…
Adsorption behavior of the hydrocarbons n -hexane, n -octane, cyclohexane, neopentane, and benzene on microporous activated carbon fibers (ACFs) was studied by use of molecular adsorption and adsorption calorimetry. The calorimetric aspects were discussed in connection with pore characteristics determined by nitrogen…