Recent advances in diffuse ferroelectric phase transitions
Models for understanding the properties of relaxor ferroelectrics are reviewed, a new model being proposed.
Materials Literature
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Evidence that mutations in a loop region of the alpha-subunit inhibit the transition from an open to a closed conformation in the tryptophan synthase bienzyme complex.
Rapid-scanning stopped-flow (RSSF) UV-visible spectroscopy has been used to investigate the effects of single amino acid mutations in the alpha-subunit of the Salmonella typhimurium tryptophan synthase bienzyme complex on the reactivity at the beta-subunit active site located 25 to 30 A distant. The pyridoxal 5'-phosp…
Application of an Ion‐Packing Model Based on Defect Clusters to Zirconia Solid Solutions: I, Modeling and Local Structure of Solid Solutions
Oxygen vacancies can be introduced into zirconia solid solution ZrO 2 –MO u ( u = 1 and 1.5) to maintain electroneutrality. Recently, the local structures around Zr 4+ and M 2 u + ions in ZrO 2 –MO u solid solutions have been studied through EXAFS spectroscopy, diffuse scattering analysis, and single‐crystal structure…
Redesigned purification yields a fully functional PutA protein dimer from Escherichia coli.
Proline utilization by Escherichia coli and Salmonella typhimurium requires expression of genes putP (encoding a proline transporter) and putA. Genetic data indicate that the PutA protein is both put repressor and a respiratory chain-linked dehydrogenase. We report a redesigned purification procedure as well as the ph…
A ferrochelatase transition-state model. Rapid incorporation of copper(II) into nonplanar dodecaphenylporphyrin
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA ferrochelatase transition-state model. Rapid incorporation of copper(II) into nonplanar dodecaphenylporphyrinJun Takeda, Toshie Ohya, and Mitsuo SatoCite this: Inorg. Chem. 1992, 31, 13, 2877–2880Publication Date (Print):June 1, 1992Publication History Published online1 Ma…
Electronic structure ofLa2−xSrxNiO4studied by photoemission and inverse-photoemission spectroscopy
The electronic structure of ${\mathrm{La}}_{2\mathrm{\ensuremath{-}}\mathit{x}}$${\mathrm{Sr}}_{\mathit{x}}$${\mathrm{NiO}}_{4}$ is studied by use of photoemission spectroscopy, bremsstrahlung-isochromat spectroscopy (BIS), and electron-energy-loss spectroscopy. Quantitative analyses are made on the valence-band and N…
Organization of cortical cytoskeleton of cultured chromaffin cells and involvement in secretion as revealed by quick-freeze, deep-etching, and double-label immunoelectron microscopy
We have studied the organization of the cytoskeleton in both unstimulated and stimulated cultured chromaffin cells, as well as its relationship with their secretory process by exocytosis. We found the spatial heterogeneity in the intensity of cortical rhodamine-phalloidin staining within a cell. The overall staining p…
Calculation of diffuse scattering from simulated disordered crystals: a comparison with optical transforms
An investigation is carried out on the feasibility of calculating the diffuse scattering from computer simulations of crystals containing substitutional and displacement disorder which have hitherto been used in conjunction with optical transform methods to aid in the interpretation of observed X-ray diffraction patte…
Dimeric substituted copper phthalocyanine liquid crystals. Synthesis, characterization and magnetic properties
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Hydrothermal synthesis of K2PdSe10. Coexistence of two large interpenetrating three-dimensional frameworks of [Pd(Se4)2]2- and [Pd(Se6)2]2-
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHydrothermal synthesis of K2PdSe10. Coexistence of two large interpenetrating three-dimensional frameworks of [Pd(Se4)2]2- and [Pd(Se6)2]2-Kang Woo Kim and Mercouri G. KanatzidisCite this: J. Am. Chem. Soc. 1992, 114, 12, 4878–4883Publication Date (Print):June 1, 1992Publica…
Theoretical studies of spin-forbidden radiationless decay in polyatomic systems: insights from recently developed computational methods
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTheoretical studies of spin-forbidden radiationless decay in polyatomic systems: insights from recently developed computational methodsDavid R. YarkonyCite this: J. Am. Chem. Soc. 1992, 114, 13, 5406–5411Publication Date (Print):June 1, 1992Publication History Published onli…
Theory of Single and Multiple Interfaces
Technical preliminaries general form of the surface Green function matching (SGFM) analysis matching analysis for continuous systems matching for discrete systems SGFM for coupled interfaces the geometry of the matching surface the full transfer matrix and SGFM for continuous media transfer matrix and SGFM for discret…
Spectroscopic and theoretical studies on the excited state in diimine dithiolate complexes of platinum(II)
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSpectroscopic and theoretical studies on the excited state in diimine dithiolate complexes of platinum(II)Juan A. Zuleta, Joanne M. Bevilacqua, Davide M. Proserpio, Pierre D. Harvey, and Richard EisenbergCite this: Inorg. Chem. 1992, 31, 12, 2396–2404Publication Date (Print)…
Fatty acids in layered metal hydroxides: membrane-like structure and dynamics
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFatty acids in layered metal hydroxides: membrane-like structure and dynamicsMarlon Borja and Prabir K. DuttaCite this: J. Phys. Chem. 1992, 96, 13, 5434–5444Publication Date (Print):June 1, 1992Publication History Published online1 May 2002Published inissue 1 June 1992https…
Synthesis, characterization, and 1/T1 NMRD profiles of gadolinium(III) complexes of monoamide derivatives of DOTA-like ligands. X-ray structure of the 10-[2-[[2-hydroxy-1-(hydroxymethyl)ethyl]amino]-1-[(phenylmethoxy)methyl]-2-oxoethyl]-1,4,7,10-tetraazacyclododecane-1,4,7-triacetic acid-gadolinium(III) complex
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis, characterization, and 1/T1 NMRD profiles of gadolinium(III) complexes of monoamide derivatives of DOTA-like ligands. X-ray structure of the 10-[2-[[2-hydroxy-1-(hydroxymethyl)ethyl]amino]-1-[(phenylmethoxy)methyl]-2-oxoethyl]-1,4,7,10-tetraazacyclododecane-1,4,7-t…
Organic template-directed inorganic crystallization: oriented nucleation of barium sulfate under compressed Langmuir monolayers
Langmuir monolayers of n-eicosyl sulfate were shown to influence the nucleation of BaSO<sub>4</sub> grown from supersaturated solutions (S = 30) at room temperature (293 K). Thin, elongated single crystalline plates were nucleated with the (100) face parallel to the plane of the monolayer. Partial matching…
Phase separation in binary hard-core mixtures: An exact result
We prove the existence of a first-order, entropy-driven demixing transition in a simple lattice model for a hard-core mixture. The existence of this transition follows from the fact that this lattice model can be mapped onto an Ising model with nearest-neighbor interactions for which the phase behavior is known. The s…
Properties of trypsin and of acid phosphatase immobilized in sol‐gel glass matrices
Trypsin and acid phosphatase-containing silica sol-gel glasses were obtained by mixing a solution of an enzyme with polyethylene glycol (PEG) 6000 and tetramethoxy orthosilicate at room temperature, followed by gelation and drying. Activity of the immobilized trypsin toward small substrates, such as N-benzoyl-L-argini…
Vacuum microelectronics-1992
Vacuum microelectronics is a new interdisciplinary field utilizing the mechanism of electron emission into a vacuum for devices requiring bulk and surface micromachining. By fabricating arrays of conductive or semiconductive structures that are either gated or ungated, a multitude of devices can be formed that utilize…
Minor groove binding of [Ru(phen)3]2+ to [d(CGCGATCGCG)]2 evidenced by two-dimensional NMR
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMinor groove binding of [Ru(phen)3]2+ to [d(CGCGATCGCG)]2 evidenced by two-dimensional NMRMagdalena Eriksson, Mikael Leijon, Catharina Hiort, Bengt Norden, and Astrid GraeslundCite this: J. Am. Chem. Soc. 1992, 114, 12, 4933–4934Publication Date (Print):June 1, 1992Publicati…