Materials Literature
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A light-harvesting pigment-protein complex was isolated from the diatom Phaeodactylum tricornutum using the zwitterionic detergent CHAPS (3-[3-cholamidopropyl)dimethylammonio]-1-propanesulfonate). Detergent-solubilized membranes were fractionated by sucrose density gradient centrifugation into three components. The me…
Electronic as well as localized and delocalized vibrational losses were studied on ${\mathrm{TiO}}_{2}$(110) by electron-energy-loss spectroscopy. Electronic loss features at defect surfaces around 0.8 eV indicate band-gap defect states. In the higher loss-energy range above 3 eV well-known interband transitions were…
The nucleation and growth of Si 3 N 4 from a carbon‐Si0 2 mixture in an N 2 atmosphere at 1400°C was studied by varying the specific surface area, particle size, and distribution of the Si0 2 and carbon. Si 3 N 4 yield increased and particle size decreased with increasing Si0 2 and carbon specific surface area. Manner…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMetal-support interactions on rhodium and platinum/titanium dioxide model catalystsD. N. Belton, Y. M. Sun, and J. M. WhiteCite this: J. Phys. Chem. 1984, 88, 22, 5172–5176Publication Date (Print):October 1, 1984Publication History Published online1 May 2002Published inissue…
The thermal evolution of the equilibrium shape of an fcc crystal with both first- and second-nearest-neighbor interatomic interactions is studied. Exact zero-temperature calculations are extended to nonzero temperatures by use of solid-on-solid models appropriate to 001> and 110> directions in the crystal, yield…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReaction of a carbon analog of iodosylbenzene with iron porphyrins: isolation and x-ray structure of an iron(II) complex with O-C-C moieties inserted between two trans iron-nitrogen bondsDaniel Mansuy, Jean Paul Battioni, Irena Akhrem, Daniel Dupre, Jean Fischer, Raymond Wei…
Abstract The far infrared and submillimeter dielectric function of sodium nitrite single crystal are determined by means of precise transmission spectroscopy (8 to 17 cm −1 ) and reflection spectroscopy (10 to 600 cm −1 ) over the temperature range 20 to 230 °C for the a and c crystallographic directions. All the infr…
A Perfectly Stirred Reactor model, kinetic rate data, and equilibrium adiabatic flame temperatures have been incorporated into a closed form NOx prediction algorithm. The algorithm accounts for combustor inlet parameters and steam injection. Combining this model with the operating map for the gas turbine allows predic…
The cold-working effect on the average magnetic interaction ($\overline{J}$), the spontaneous magnetization at 0 K (${M}_{0}$), and the magnetic transition temperature (${\ensuremath{\Theta}}_{m}$) in the Heusler alloys is formulated by means of dislocation theory with consideration of ferromagnetic and antiferromagne…
A new DSC method is used to study a smectic A to nematic transition. The measurement of the height of the DSC transition peak gives the order of the transition. The smectic A to nematic transition of octyl cyanobiphenyl was found to be second order while the same transition was found to be first order for nonyl cyanob…
A modification of the Rietveld refinement program is introduced by replacing the Gaussian profile function with a Voigtian. The performance of the program is tested by an application to simulated and measured diffraction patterns of NaTaO 3 , and excellent results are obtained when the tails of the reflections are inc…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolyurethane Interpenetrating Polymer-Networks (IPN's) synthesized under high pressure. 2. Morphology and Tg behavior of polyurethane-polystyrene IPN'sDoo Sung Lee and Sung Chul KimCite this: Macromolecules 1984, 17, 10, 2193–2196Publication Date (Print):October 1, 1984Publi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA "closed" bridging stibinidene complexAlan H. Cowley, Nicholas C. Norman, and Marek PakulskiCite this: J. Am. Chem. Soc. 1984, 106, 22, 6844–6845Publication Date (Print):October 1, 1984Publication History Published online1 May 2002Published inissue 1 October 1984https://pub…
Improved empirical methods for the prediction of perforation of reinforced concrete barriers by missiles produced by turbine fracture are developed. Data from recent turbine missile tests and existing empirical methods of perforation damage analysis were collected and compared. Selected formulas were chosen for improv…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis of pure head-to-tail poly(trifluoroethylenes) and their characterization by 470-MHz fluorine-19 NMRRudolf E. Cais and Janet M. KometaniCite this: Macromolecules 1984, 17, 10, 1932–1939Publication Date (Print):October 1, 1984Publication History Published online1 May…
The photoelasticity of R n O m SiO 2 (R n O m =Li 2 O, Na 2 O, K 2 O, and ZnO), Li 2 O‐Al 2 O 3 ‐SiO 2 , Na 2 O‐Al 2 O 3 ‐SiO 2 , and Na 2 O‐ZnO‐SiO 2 glasses was analyzed on the basis of the following equation relating the stress‐optical coefficient and the strain‐optical coefficient: image where C is the stress‐opti…
Radiation damage is a limiting factor for high resolution structural determination of protein crystals. We have used the median and quartile values of Ne exposures and the structural disordering factor (delta B) to describe the crystalline disordering due to radiation damage in thin crystals of crotoxin complex embedd…
The forces required to remove living, fully attached barnacles from the surface of a number of polymeric solids were measured. The forces were related to the surface energy components of the materials. The results indicate a positive correlation between polymer surface energy and force required for barnacle removal. T…
Abstract Alkyl β ‐D‐glycopyranosides composed of glucose, maltose or maltotriose attached to alkyl groups having from 4 to 18 carbon atoms were synthesized and tested for their physical and functional properties. Values are given for melting points, optical rotations, detergencies, critical micelle concentrations, sur…
In the present work, the temperature dependence of the magnetostriction constant, λs, is presented for two Co-rich amorphous alloys which have a very low magnetostriction (about 10−7). These measurements have been carried out with the help of a new sensitive method and a change of sign of λs has been found experimenta…