Materials Literature
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We used electron-energy-loss spectrometry to measure the intensities of the Cu white lines found at the onsets of the ${\mathit{L}}_{2}$ and ${\mathit{L}}_{3}$ absorption edges of rapidly quenched CuZr, CuTi, CuPd, CuPt, and CuAu. Enhancements of the white lines in the alloys as compared to elemental Cu were correlate…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotoinduced Reduction of Viologens on Size-Separated CdS NanocrystalsHajime Matsumoto, Hiroyuki Uchida, Takahiro Matsunaga, Koji Tanaka, Takao Sakata, Hirotaro Mori, and Hiroshi YoneyamaCite this: J. Phys. Chem. 1994, 98, 44, 11549–11556Publication Date (Print):November 1,…
Orientationally disordered crystals possess translational order while retaining rotational and conformational degrees of freedom. Because these materials exhibit a glasslike transition, they are of great theoretical and experimental interest as model systems for structural glasses. We present detailed measurements of…
Abstract Conjugated dimeric TTFs linked with an ethenylene or ethynylene spacer were prepared as novel electron donors and preferentially formed 1:1 complexes with TCNQF4 and with DDQ, which were more conductive than those of monomeric TTFs.
This study focused on the chemistry of soil water samples (SWS) obtained by tension-free lysimetry from serpentinitic, i.e., Cr- and Ni-rich, Dystric Eutrochrepts. Soil water samples from undisturbed soil profiles had total elemental concentrations (μnmol/L) of O.1–3.2 Cr, O.2–3.1 Ni, 3–154 Fe, and 55–401 Mg; however,…
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…