Materials Literature
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The crystallographic nature of a quasicrystal structure is expressed in terms of the possibility of labeling `translationally' equivalent atomic positions by a set of n integers. The corresponding position vectors are integral linear combinations of n basic ones generating a vector module M of rank n and dimension m.…
The smectic layer structure within texture lines is investigated with a (sub)micrometer optical measuring spot. The property that the SmC-cone is perpendicular to the smectic layer is used to measure the in-plane rotation angle of the local smectic layers. From the measurements and observations it is concluded that te…
In-situ magnetizers are needed to facilitate the assembly of permanent magnet machines and to remagnetize the magnets after weakening due to a fault condition. The air-core magnetizer in association with the silicon steel lamination structure of the rotor has advantages over its iron-core counterpart. This method has…
Fine Si 3 N 4 ‐SiC composite powders were synthesized in various SiC compositions to 46 vol% by nitriding combustion of silicon and carbon. The powders were composed of α‐Si 3 N 4 , β‐Si 3 N 4 , and β‐SiC. The reaction analysis suggested that the SiC formation is assisted by the high reaction heat of Si nitridation. T…
Abstract The stirring speed n influences the emulsion polymerization of butadiene, (1) by reducing the effective emulsifier concentration [E] eff available for particle nucleation and stabilization at high n , and (2) by limiting diffusion of monomer to the latex particles at low n . The large density difference betwe…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTProtection and polymerization of functional monomers. 16. Anionic living polymerization of 4-[(trimethylsilyl)ethynyl]styreneTakashi Ishizone, Akira Hirao, Seiichi Nakahama, Toyoji Kakuchi, Kazuaki Yokota, and Katsuyuki TsudaCite this: Macromolecules 1991, 24, 18, 5230–5231P…
From structural, thermodynamical analysis and polarization measurements, we show that the N* S*C phase transition of the homologous n = 8 of a biphenyl benzoate series appears near a N* SA S*C multicritical point. Dielectric measurements detect a relaxation process in the N* phase. The temperature dependence of the di…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSinglet oxygen generation by triplet charge-transfer complexesAlexander P. Darmanyan, James W. Arbogast, and Christopher S. FooteCite this: J. Phys. Chem. 1991, 95, 19, 7308–7312Publication Date (Print):September 1, 1991Publication History Published online1 May 2002Published…
It has been shown that output-dependent Preisach models are not limited by the congruency property of other Preisach models. The problem of the relationship between two such models is addressed: the moving model and the product model. A study of the minor hysteresis loops generated by the two models highlights the ess…
The formation of hydrogen tungsten bronzes, , prepared electrochemically from thin films of amorphous , has been thermodynamically studied. The variation of the chemical potential of the inserted species in these thin films of oxide at ambient temperature has been measured using an electrochemical method. The reductio…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAnionic polymerization of monomers containing functional groups. 3. Anionic living polymerization of N,N dialkyl-4-vinylbenzamidesTakashi Ishizone, Sumio Wakabayashi, Akira Hirao, and Seiichi NakahamaCite this: Macromolecules 1991, 24, 18, 5015–5022Publication Date (Print):S…
N.D. BENBOUZID‐ROLLET, M. CONTE, J. GUEZENNEC AND D. PRIEUR. 1991. In an aerobic bulk environment sulphate‐reducing bacteria (SRB) can find suitable growth conditions on surfaces where other micro‐organisms have developed an extensive biofilm. On metal surfaces they may induce or enhance corrosion. A laboratory tubula…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSingle-crystal neutron diffraction study of ethyleneosmium complex of (.mu.-.eta.1,.eta.1-C2H4)Os2(CO)8, a model for one type of chemisorbed ethyleneOren P. Anderson, Bruce R. Bender, Jack R. Norton, Allen C. Larson, and Phillip J. VergaminiCite this: Organometallics 1991, 1…
Some properties of the moving Preisach model are examined. It is found that this model can introduce hysteresis in materials where it is not intrinsically present. It is shown that the moving model has the wiping-out property, even in the case where a reversible component of magnetization is present in addition to the…
Abstract To material scientists the term texture means the crystallographic orientation of grains in a polycrystal. In contrast, geologists use the term more generally to refer to the spatial arrangement or association of mineral grains in a rock. In this contribution we are concerned with the materials science defini…
Francolites, carbonate fluorapatites, occur in temporally and spa- tially related sedimentary phosphorite deposits that range in age from the Proterozoic to the Neogene. Previous mineralogical studies of francolites have established that systematic relationships exist between chemical composition and crystdlographic d…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDirect polyiodination of benzenesulfonic acidDaniell Lewis Mattern and Xinhua ChenCite this: J. Org. Chem. 1991, 56, 20, 5903–5907Publication Date (Print):September 1, 1991Publication History Published online1 May 2002Published inissue 1 September 1991https://pubs.acs.org/do…
An application of diffuse reflectance infrared Fourier transform (DRIFT) spectrometry to determine powdery sample with an unknown particle size has been proposed. The usefulness of this technique has been demonstrated for the analysis of the α-component in Si 3 N 4 powders. The particle size of the α-component in Si 3…
Abstract Five- and six-coordinated nitrosyl iron(II) complexes of a series of tetrakis(p-substituted phenyl)porphyrins have been prepared. Their EPR and IR spectra have been measured and analyzed in order to elucidate the cis-effect of substituents on the axial nitrosyl ligand. As the first redox potentials of the fre…
We have isolated a cDNA clone for a P-450, designated P-450ib (Ichihara, K., Kusunose, E., Kaku, M., Yamamoto, S., and Kusunose, M. (1985) Biochim. Biophys. Acta 831, 99-105), from a cDNA library of rabbit small intestine mucosa by using synthetic DNA fragment by the polymerase chain reaction, as a hybridization probe…