Materials Literature
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Low-frequency dielectric properties of nematic liquid crystal (NLC) cells with and without polyimide alignment layers have been investigated with impedance spectroscopy. It is found that the dielectric behavior in the low frequency regime of NLC cells without polyimide alignment layers can be successfully explained in…
The measurement of x -ray diffraction line intensities is the basis for quantitative phase analysis (see for example, Chung (1974), Davis (1986), and Hubbard and Snyder (1988)). While there are many sources of error in such measurements, in recent years computer automation of powder diffractometers and associated anal…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDesulfurization of Hot Coal-Derived Fuel Gases with Manganese-Based Regenerable Sorbents. 3. Fixed-Bed TestingR. Ben-Slimane and M. T. HepworthCite this: Energy Fuels 1995, 9, 2, 372–378Publication Date (Print):March 1, 1995Publication History Published online1 May 2002Publi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAzobenzimidazole Compounds and Polymers for Nonlinear OpticsElisa M. Cross, Kenneth M. White, Robert S. Moshrefzadeh, and Cecil V. FrancisCite this: Macromolecules 1995, 28, 7, 2526–2532Publication Date (Print):March 1, 1995Publication History Published online1 May 2002Publi…
Isoporphyrins are porphyrin tautomers with a saturated meso carbon and thus an interrupted π system. We report here steady-state optical absorption, fluorescence, and fluorescence polarization data as well as time-resolved results that detail the significant effects of porphyrine tautomerization on the photophysical p…
Abstract Single crystals of nearly stoichiometric CuMnO 2 were grown using a LiBO 2 flux. They crystallize in the monoclinic space group C 2/ m with cell parameters a = 557.8(6) pm, b = 288.1(2) pm, c = 588.6(7) pm, β = 104.00(5)° and Z = 2. The structure can be described as a close packing of linear [O–Cu–O] 3− group…
The removal efficiency of methyl iodide for silver-impregnated alumina from gaseous waste has been experimentally evaluated as a function of atmospheric relative humidity. A new adsorbent has been developed for the iodine filter installed in the off-gas treatment system of a radioactive waste tank vent. To improve its…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAb Initio MO Study of the CO2 Insertion into the Cu(I)-R Bond (R = H, CH3, or OH). Comparison between the CO2 Insertion and the C2H4 InsertionShigeyoshi Sakaki and Yasuo MusashiCite this: Inorg. Chem. 1995, 34, 7, 1914–1923Publication Date (Print):March 1, 1995Publication Hi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffects of Ionic Conductivities of Zirconia Electrolytes on Polarization Properties of Platinum Anodes in Solid Oxide Fuel CellsHiroyuki Uchida, Manabu Yoshida, and Masahiro WatanabeCite this: J. Phys. Chem. 1995, 99, 10, 3282–3287Publication Date (Print):March 1, 1995Public…
Abstract The bulk phase kinetics of an epoxy (DGEBA) /amine (DDS) thermoset have been studied using DSC, FTIR, and 13 C‐NMR. In the absence of catalyst, the reaction was found to involve a main exothermic reaction between epoxide and amine hydrogen and a side reaction between tertiary amine formed in the main reaction…
Aluminum solubility and release rates were studied for A horizons of three nonallophanic Andosols and for a Bhs horizon of one Spodosol that had active Al fractions dominated by Al-humus complexes. The A horizon of one allophanic Andosol was also used for comparison. Aluminum solubility relationships over the pH range…
Abstract A novel separation process, phase transition extraction, proposed in this article uses solvents that have a critical point of miscibility with the feed liquid to be extracted. Alternate heating and cooling across the coexistence curve leads alternatively to a homogeneous phase or two separate phases. The form…
The effectiveness of several metallographic techniques used to reveal the solidification structure of nodular iron has been evaluated by quantitative metallography. A colour metallography reagent, sensitive to microsegregation, provides the best results, and the correlation between the colouring and the microsegregati…
This paper describes the application of digital image processing to the grading of fabric wrinkle recovery. Degrees of fabric wrinkling of AATCC replicate standards are analyzed using a combination of texture and profile analysis techniques. Results in dicate that wrinkling can be reliably measured using gray level an…
The importance of the dissolution of manganese sulfide (MnS) inclusions in environmentally assisted cracking (EAC) of pressure vessel steels in high-temperature water is well recognized. However, no direct measurement of the crack tip chemistry that develops during EAC has been performed, and only estimates exist for…
Specific migration studies, using food simulants, have been conducted on a range of polymers which are used in food packaging and contain commonly used fatty acid amide slip additives. Migration levels using the test conditions (10 days at 40 degrees C) were found to depend primarily upon the food simulant and the pol…
An analysis is presented of the pressure versus time characteristics during the pump-down of a vacuum system with a reversibly adsorbed phase, e.g., water at room temperature, using the conservation of mass equation, where the quantity adsorbed is derived from a suitable adsorption isotherm. This quasistatic approach…
In this study, the induction of the 70-kD family of heat shock proteins (hsp70) has been examined in stony coral tissues. In these experiments, the only difference from control conditions has been exposure to a temperature approximating that at which field bleaching in the Caribbean is known to occur, approximately 30…
From recent experimental data on BN thermodynamic propeties, the equilibrium phase diagram for boron nitride has been plotted, which differs from the generally accepted Bundy-Wentorfs one. At atmospheric pressure cubic boron niride has been shown to be a thermodynamically stable modification up to temperatures of 1600…
The diameter of particles which adversely affects the yield has been shrinking as ULSI devices are more and more miniaturized. Ultrafine particles with diameters of 0.1 μm or less have become important recently. Ultrafine particles of this type are expected to be difficult to remove. This study has established a metho…