Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChemistry and Structure of Al(OH)/Organic Precipitates. A Small-Angle X-ray Scattering Study. 3. Depolymerization of the Al13 Polycation by Organic LigandsA. Masion, F. Thomas, D. Tchoubar, J. Y. Bottero, and P. TekelyCite this: Langmuir 1994, 10, 11, 4353–4356Publication Da…
We present a detailed analysis of the nature of electronic eigenfunctions in one-dimensional quasiperiodic chains based on a clustering idea recently introduced by us [Sil et al., Phys. Rev. B 48, 4192 (1993)], within the framework of the real-space renormalization-group approach. It is shown that even in the absence…
A hybrid medial tissue composed of a type I collagen gel, into which smooth muscle cells (SMCs) derived from bovine aortic media were 3-dimensionally (3D) embedded, was constructed around an elastomeric silicone tube (outer diameter: 8 mm). Subsequently, hybrid tissues thus prepared were subjected to three modes of me…
This paper describes the study of the effects of radiation damage on the quality of data collected from a protein crystal at 100 K. It is shown that radiation damage causes measurable effects in the diffraction pattern. This implies that, even at liquid nitrogen temperatures, there is a limit to the size of a crystal…
There is a need to improve the selectivity of photodynamic therapy and for better targeting of tumor cells within specific tumor compartments. Selective in vitro phototoxicity of a human bladder carcinoma cell line 647V has been achieved by targeting sulfonated aluminum phthalocyanines (AlSPc) with monoclonal antibodi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMagnetic Exchange in Dinuclear Chromium(II) Complexes: Effect of Bridging Chlorides and Bridging Hydrides in Antiferromagnetic CouplingMichael D. Fryzuk, Daniel B. Leznoff, Steven J. Rettig, and Robert C. ThompsonCite this: Inorg. Chem. 1994, 33, 24, 5528–5534Publication Dat…
Glutaconate coenzyme A-transferase (Gct) from Acidaminococcus fermentans consists of two subunits (GctA, 35725 Da and GctB, 29168 Da). The N-termini sequences of both subunits were determined. DNA sequencing of a subgenomic fragment of A. fermentans revealed that the genes encoding glutaconate CoA-transferase (gctAB)…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLangmuir-Blodgett Film Formation of a Series of Peripherally Octasubstituted MetallophthalocyaninesM. Burghard, M. Schmelzer, S. Roth, P. Haisch, and M. HanackCite this: Langmuir 1994, 10, 11, 4265–4269Publication Date (Print):November 1, 1994Publication History Published on…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDimethylvioluratobis(phenanthroline)cobalt(II), a Novel Spin-Crossover Octahedral Co(II) Complex. Synthesis, Crystal Structure and Magnetic Properties of [Co(dmvi)(phen)2]ClO4.cntdot.3H2OJuan Faus, Miguel Julve, Francisco Lloret, Jose A. Real, and Jorunn SlettenCite this: In…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSurface-Induced Asymmetries during Spinodal Decomposition in Off-Critical Polymer MixturesGeorg Krausch, Edward J. Kramer, Frank S. Bates, J. F. Marko, G. Brown, and A. ChakrabartiCite this: Macromolecules 1994, 27, 23, 6768–6776Publication Date (Print):November 1, 1994Publi…
We have incorporated chain stiffness and correlations between neighboring bonds into a self-consistent field (SCF) lattice model for end-attached polymer layers (commonly known as ‘‘brushes’’). An increase in the chain stiffness leads to an increasing brush height. This increase is directly related to the change of th…
A third-order geometric aberration theory of the ellipsoidal grating has been developed by analytically following an exact ray-tracing formalism with the aid of power series expansions. The theory takes into account all the possible aberrations up to third order and provides analytic formulas for the spot diagram of a…
The finite element method (FEM) is introduced to numerically model near-field diffraction devices using Maxwell's equations. This method is commonly used in the antenna and microwave communities to analyze scattering and waveguiding problems, but is not yet popular in the optics community. Its advantages are the rigor…
Experimental results are presented on subcritical crack growth under sustained and cyclic loads in a HIPed Si 3 N 4 at 1450°C and a hot–pressed Si 3 N 4 –10 vol% SiC w composite in the temperature range 1300°–1400°C. Static and cyclic crack growth rates are obtained from the threshold for the onset of stable fracture…
On the basis of a model similar to that of Su, Schrieffer, and Heeger, we investigate transitions between bipolaron and polaron states in doped heterocycle polymers such as polypyrrole, polythiophene, and polyselenophene. The dopant impurity is assumed to be located between chains, and the interchain coupling is due t…
Abstract An in situ FTIR study of the reduction of NO by propylene in O2 has shown that the reaction on the Rh/Al2O3 surface at 623 K leads to the formation of IR bands assigned to adsorbed hydrocarbons, -NCO, -CN, -NO+, -CO32− and CO2 species. The intensity of the bands depends on the reaction time and the presence o…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIonic Interactions and Charge Transport Properties of Metallopolymer Films on ElectrodesRobert J. Forster and Johannes G. VosCite this: Langmuir 1994, 10, 11, 4330–4338Publication Date (Print):November 1, 1994Publication History Published online1 May 2002Published inissue 1…
Based on the RBAO technology, low‐shrinkage mullite/SiC/ Al 2 O 3 /ZrO 2 composites were fabricated. A powder mixture of 40 vol% Al, 30 vol% A1 2 O 3 and 30 vol% SiC was attrition milled in acetone with TZP balls which introduced a substantial ZrO 2 wear debris into the mixture. The precursor powder was isopressed at…
Ferroelectric Pb[(Mg 1/3 Nb 2/3 ) x Ti 1- x ]O 3 (PMNT) thin films with a well-developed perovskite structure were prepared on Si(100) and Pt/Ti/ SiO 2 /Si(100) substrates by rf magnetron sputtering deposition at high substrate temperatures of 480–650° C. The effect of substrate materials was investigated by X-ray dif…
The composition ranges of Al-Ni-Co decagonal quasicrystals in superlattice-ordered and disordered states have been investigated. The single-decagonal-phase region is limited to a very small area around ${\mathrm{Al}}_{71}$${\mathrm{Ni}}_{16}$${\mathrm{Co}}_{13}$ at 650 \ifmmode^\circ\else\textdegree\fi{}C, which expan…