Materials Literature
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Electrically conductive rubbers have been prepared by the incorporation of conductive carbon black into ethylene/vinyl acetate (EVA) copolymers, ethylene/propylene/diene monomer (EPDM) terpolymers, and a 50 : 50 EVA–EPDM blend. The electrical and mechanical properties of these composites have been studied. The percola…
Abstract The low temperature (LT) modification of Cs 3 Bi 2 I 9 has been refined to R ( F ) = 0.055 on the basis of X-ray diffraction measurements at T = 130 K from a twin crystal with six fractions connected by 3-fold axis and m -planes symmetry operations. Data were collected on a KM4CCD diffractometer; Mo K α -radi…
The inhibitory effects of pelargonic and capric acid on Microsporum gypseum were examined. Solid and liquid Sabouraud glucose media containing different concentrations of pelargonic and capric acid were separately prepared and inoculated with the suspension of mycelium and spores of M. gypseum and incubated at 25 degr…
Abstract The classic breakage problem is a population‐balance problem using first‐order kinetics and product distribution rules over a multidimensional continuum, mathematically expressed as linear integrodifferential equations for the multiindexed frequency distribution functions of entities. To model the catalytic c…
From the Ag and Cu Auger signals measured on the surface of nanocrystalline Cu/Ag thin bilayers, the temperature dependence of the parameter ω′ for Ag grain-boundary diffusion in Cu (ω′=δkbDb/δsks, where δ and δs are the width of the grain boundary and the segregated layer and kb and ks are the grain-boundary and surf…
Abstract In this study, we present Cu L 3 M 45 M 45 Auger spectra in coincidence with Cu 2p 3 / 2 from the oxidized surface of Cu (i.e. CuO x /Cu) and Cu 2p 3 / 2 lines in coincidence with Auger 1 G and 3 F terms of Cu L 3 VV from Cu. Comparison of the L 3 VV line structures of CuO x /Cu with that of Cu reveals that t…
A method for measuring the spontaneous polarization P s, the switching time, the rotational viscosity γφ, and the d.c. conductivity σ is presented. The possibilities of estimating the azimuthal angle φ0, the dielectric anisotropy δε and the dielectric permittivity ε⊥ in the same experiment are also discussed. It is ex…
Very little data are available regarding the genesis of Inceptisols derived from pyroclastic materials in Taiwan because most of the earlier research focused on Andisols. This study was conducted to explain the formation of Inceptisols derived from the pyroclastic material in northern Taiwan. Three pedons representing…
A new triterpenoid ester 3,29-di-O-(p-methoxy)benzoylmultiflora-8-ene-3 alpha,29-diol-7-one from the seeds of Momordica cochinchinensis Spreng has been isolated. Its structure was elucidated by spectroscopic evidence and confirmed by X-ray crystallography.
The first banana-shaped liquid crystal materials with photo-active azo linkages are reported. The higher temperature mesophase X1 (believed to be B6) above the B1 phase exhibited by these azo compounds shows antiferroelectric switching characteristics. The observation of banana phases in azo compounds assumes signific…
Ion transport in liquid crystals can have a negative influence on liquid crystal display performance. We introduce the importance of ion transport in industry and and the performed research. Afterwards the contribution of University of Gent will be presented in three topics: determination of concentration and mobility…
Methods for determining the workability of freshly mixed portland-cement concrete with slumps less than 51 mm (2 in.) were investigated. Four potential methods to determine the workability of concrete were proposed for evaluation and development. The methods included two moving-object methods, one free-orifice method,…
A key question arising from studies on the corrosion behavior of molybdenum has been whether the passivation of molybdenum originates from a three-dimensional oxide film or from chemisorbed oxygen. In the present paper an alternative explanation for the apparent passivation behavior of molybdenum is given based on XPS…
The use of a fingerprint texture of a cholesteric liquid crystal is demonstrated as a template to direct the formation of periodically ordered micro-size polymer walls. The morphology-property correlation of polymer-stabilized cholesteric gratings (PSCGs) was established for mesogenic and non-mesogenic reactive monome…
Abstract The photoluminescent property of a bilayer of phthalocyanine and a perylene derivative, a part of an organic photovoltaic cell, was investigated. The monolayer of the perylene derivative exhibited photoluminescence at 824 nm with lifetimes of 1.6 ns and 0.10 ns. The steady state and time-resolved photolumines…
This document presents a qualification plan that will provide the detailed background information and engineering practices to help ensure the control of repeatable base material properties and processes, which are applied to both primary and secondary structures for aircraft products using composite materials. This q…
A poly(aniline sulfate) salt was prepared by an emulsion polymerization pathway. A mixture of epoxy resin and the poly(aniline sulfate) salt sample was prepared using chloroform as solvent, and studied using both dynamic and isothermal differential scanning calorimetry (DSC). DSC analysis was performed on samples with…
The melting process of isotactic poly(propylene) (iPP) sample isothermally crystallized at 130°C for half an hour is carefully studied by means of variable-temperature FTIR spectroscopy and DSC. Based on the IR intensity changes of regularity and conformational bands vs. temperature, it is found that the helical struc…
Conventional computational fluid dynamics (CFD) methods for simulating the flow through automotive exhaust catalysts assume a monolith resistance based on one-dimensional laminar flow. This underpredicts the flow maldistribution in the monolith. Incorporation of an additional pressure loss accounting for entrance effe…
Abstract The hexadentate complex Mg[Ni(1,3-pdta)]•H2O (1,3-pdta = 1,3-propanediaminetetraacetate ion) was prepared and its structure established by X-ray crystallography. The complex salt crystallizes in the space group Pnna (# 52) of the orthorhombic crystal system with a = 13.251(2), b = 11.645(2), c = 13.818(3) Å a…