Materials Literature
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We investigated the morphology of dendrite tips through the growth and measurement of pure succinonitrile dendrites at a fixed supercooling of 0.46 K. Many current theories of dendritic growth rely on the assumption that the tip region can be approximated by a paraboloid of revolution. The evidence presented here sugg…
The Escherichia coli maltose system consists of a number of genes whose products are involved in the uptake and metabolism of maltose and maltodextrins. MalT is the central positive gene activator of the regulon and is, together with the cyclic AMP-catabolite gene activator protein system, necessary for the expression…
Protein prenylation utilizes different types of isoprenoids groups, namely farnesyl and geranylgeranyl, to modify proteins. These lipophilic moieties attach to carboxyl-terminal cysteine residues to promote the association of soluble proteins to membranes. Most prenylated proteins are geranylgeranylated. Geranylgerany…
We discuss the scattering theory of nanocrystalline solids, based on an evaluation of the intragrain and intergrain parts of the atomic distribution function. The results are applied to experimental x-ray scattering data obtained on a set of nanocrystalline Pd samples, prepared by inert-gas condensation, with differen…
The potential relevance of polyoxometalate chemistry for providing compounds that can be of interest in molecular magnetism and in the preparation of new classes of molecular materials is discussed. We show that this kind of inorganic complex provides remarkable examples of magnetic clusters for which the number and t…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure Organization of Silicate Polyanions with Surfactants: A New Approach to the Syntheses, Structure Transformations, and Formation Mechanisms of Mesostructural MaterialsColin A. Fyfe and Guoyi FuCite this: J. Am. Chem. Soc. 1995, 117, 38, 9709–9714Publication Date (Pr…
functionalized amphiphiles, derived from polystyrene-poly (propylene imine)
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCarbosilane-Based Dendritic PolyolsKlaus Lorenz, Rolf Muelhaupt, Holger Frey, Uwe Rapp, and Franz J. Mayer-PosnerCite this: Macromolecules 1995, 28, 19, 6657–6661Publication Date (Print):September 1, 1995Publication History Published online1 May 2002Published inissue 1 Septe…
Structure-directing hydrogen bonding, the molecular symmetry of the guest, and charge matching between host and guest are used to assemble four-ring units into sodalite-type cage assemblies with the imposition of the molecular symmetry of the template (guest) onto the final framework structure. Variable charge matchin…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDi-, Tri-, and Tetranucleating Pyridyl Ligands Which Facilitate Multicenter Magnetic Exchange between Paramagnetic Molybdenum CentersAngelo J. Amoroso, Alexander M. W. Cargill Thompson, John P. Maher, Jon A. McCleverty, and Michael D. WardCite this: Inorg. Chem. 1995, 34, 19…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructures, Electronic Properties, and Oxidation-Reduction Reactivity of Halogenated Iron PorphyrinsMark W. Grinstaff, Michael G. Hill, Eva R. Birnbaum, William P. Schaefer, Jay A. Labinger, and Harry B. GrayCite this: Inorg. Chem. 1995, 34, 19, 4896–4902Publication Date (Pr…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTUseful Designs in the Synthesis of Trans-Fused Polyether ToxinsEleuterio Alvarez, Maria-Luz Candenas, Ricardo Perez, Jose Luis Ravelo, and Julio Delgado MartinCite this: Chem. Rev. 1995, 95, 6, 1953–1980Publication Date (Print):September 1, 1995Publication History Published…
Ferroelectric thin films of bismuth layer structured compounds, SrBi 2 Ta 2 O 9 , SrBi 2 Nb 2 O 9 , SrBi 4 Ti 4 O 15 and their solid solutions, were formed onto a sputtered platinum layer on a silicon substrate using spin-on technique and metal-organic decomposition (MOD) method. X-ray diffraction (XRD) analysis and s…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSingle Crystal Study of ClOO. Matrix Effects in the ESR and IR Spectra of ClOO Trapped in KClO4J. R. BybergCite this: J. Phys. Chem. 1995, 99, 36, 13392–13396Publication Date (Print):September 1, 1995Publication History Published online1 May 2002Published inissue 1 September…
A theoretical study of the mechanism of the first oxidation step of disulfides to thiosulfinates was performed on hydrogen disulfide and methyl disulfide with hydrogen peroxide. Ab initio molecular orbital calculations were carried out with the 6-31G** basis set. Key equilibrium geometries and transition states were o…
The volume and grain boundary diffusion coefficients (D v and δD gb ) of oxygen at 1673 K in pure and Mg‐doped alumina were studied by using a resistive anode encoder of SIMS. The effect of Mg‐doping on D v , was observed clearly. The differences on δD gb in pure and Mg‐doped alumina were about 3 orders and 1 order of…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDefects and molecular alignment in monolayers of thermotropic liquid crystals on waterMarc N. G. de Mul and J. Adin Mann Jr.Cite this: Langmuir 1995, 11, 9, 3292–3295Publication Date (Print):September 1, 1995Publication History Published online1 May 2002Published inissue 1 S…
In this paper we show that, for any 3-connected graph G, if an automorphism of G is realizable by a homeomorphism of (S 3 , G) then there is an embedding of G such that that automorphism is induced by a finite order homeomorphism of (S 3 , G). We then use this result to characterize which automorphisms of an arbitrary…
Instead of the classic Fourier equation based on diffusion, a hyperbolic equation based on a wave model has been used to predict the rapid transient heat conduction in IC chips. The peak temperature, spatial difference, and time variation of temperature, which are critical to thermal reliability of the chip, are given…
A new theoretical approach for the prediction of the growth habit of crystals is presented. This approach is based on a newly derived relation between the growth rate of crystal surfaces and habit-controlling factors, and includes a key step: a so-called interface structure (IS) analysis. This analysis is to formulate…