Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotocatalytic activity and selectivity of titania colloids and particles prepared by the sol-gel technique: photooxidation of phenol and atrazineE. Pelizzetti, C. Minero, E. Borgarello, L. Tinucci, and N. SerponeCite this: Langmuir 1993, 9, 11, 2995–3001Publication Date (Pr…
Kanamycin nucleotidyltransferase, as originally isolated from Staphylococcus aureus, inactivates the antibiotic kanamycin by catalyzing the transfer of a nucleotidyl group from nucleoside triphosphates such as ATP to the 4'-hydroxyl group of the aminoglycoside. The molecular structure of the enzyme described here was…
Highly transparent and conducting group IV impurity-doped ZnO thin films have been prepared on low-temperature substrates below 140 °C by rf magnetron sputtering. Resistivities of 4–8×10−4 Ω cm and an average transmittance above 85% in the visible range were obtained for ZnO films doped with Si, Ge, Ti, Zr, or Hf. The…
Microbial biofilms containing sulfate‐reducing bacteria (SRB) and general anaerobic bacteria (GAB) were grown in a closed flow channel reactor in air‐saturated bulk liquid. The SRB proliferated within anaerobic microniches even when dissolved oxygen penetrated the entire biofilm at some locations. Corrosion of mild st…
The electrical conductivity of Na- and Li-implanted diamond is investigated. The highest conductivities are obtained for high dose implantations followed by thermal graphitization of the heavily damaged layer and chemical removal of the graphitized layer. The temperature dependence of the resistivity is measured, yiel…
Abstract Although specimen smectities (e.g., SWy‐1) are often used as analogues of the exchanger phase in smectitic soils, few comparisons of metal ion sorption on specimen and soil smectites have been made. In this study, the sorption of Cd was measured on SWy‐1 and on clay‐sized separates from two smectitic subsoils…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTGadolinium(III) texaphyrin: a novel MRI contrast agentJonathan L. Sessler, Tarak D. Mody, Gregory W. Hemmi, Vincent Lynch, Stuart W. Young, and Richard A. MillerCite this: J. Am. Chem. Soc. 1993, 115, 22, 10368–10369Publication Date (Print):November 1, 1993Publication Histor…
Experimental methods and theoretical models that enable interaction effects in particulate systems to be examined are discussed. Two distinct regimes of behavior are considered. The weak interaction case is examined and it is shown that, in general, low-field susceptibility studies can be used to establish the effects…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSyndiospecific ring-opening polymerization of .beta.-butyrolactone to form predominantly syndiotactic poly(.beta.-hydroxybutyrate) using tin(IV) catalystsJohn E. Kemnitzer, Stephen P. McCarthy, and Richard A. GrossCite this: Macromolecules 1993, 26, 23, 6143–6150Publication…
We report neutron-diffraction studies of antiferromagnetism in various forms of epitaxially grown zinc-blende (ZB) MnTe: in semibulk (\ensuremath{\sim}1 \ensuremath{\mu}m thick) single-crystal films of pure MnTe, in its magnetically diluted derivative ${\mathrm{Zn}}_{1\mathrm{\ensuremath{-}}\mathit{x}}$${\mathrm{Mn}}_…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCarbide formation via carbon monoxide dissociation across a tungsten-tungsten triple bondRebecca L. Miller, Peter T. Wolczanski, and Arnold L. RheingoldCite this: J. Am. Chem. Soc. 1993, 115, 22, 10422–10423Publication Date (Print):November 1, 1993Publication History Publish…
We measure optically the quadrupolar order S induced by a stabilizing electric field E in the isotropic phase of the nematogenic 4'-n-pentyl-4-cyanobiphenyl, with large positive dielectric anisotropy ${\mathrm{\ensuremath{\epsilon}}}_{\mathit{a}}$\ensuremath{\sim}10. For high enough field and low enough temperature, a…
The dynamic responses of a spherical bubble in an acoustic standing wave field are studied numerically. The equations of motion in the translational and the radial directions are solved simultaneously. It is shown that a bubble which is larger than the resonance size moves to a node of the pressure field and its radia…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEndoperoxide formation in a guanosine derivativeChimin Sheu and Christopher S. FooteCite this: J. Am. Chem. Soc. 1993, 115, 22, 10446–10447Publication Date (Print):November 1, 1993Publication History Published online1 May 2002Published inissue 1 November 1993https://pubs.acs…
The atomic and electronic structures of lattice defects in oxygen-deficient rutile ${\mathrm{TiO}}_{2\mathrm{\ensuremath{-}}\mathit{x}}$ (1\ifmmode\times\else\texttimes\fi{}${10}^{\mathrm{\ensuremath{-}}4}$\ensuremath{\lesssim}x\ensuremath{\lesssim}3\ifmmode\times\else\texttimes\fi{}${10}^{\mathrm{\ensuremath{-}}3}$)…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHigh-pressure single-crystal x-ray diffraction study of two spin-crossover iron(II) complexes: Fe(Phen)2(NCS)2 and Fe(Btz)2(NCS)2Thierry Granier, Bernard Gallois, Jacques Gaultier, Jose Antonio Real, and Jacqueline ZarembowitchCite this: Inorg. Chem. 1993, 32, 23, 5305–5312P…
The hydrolytic degradation of poly(DL-lactic acid) in an aqueous environment in which hydroxyl radicals have been generated has been investigated. Different methods (gel permeation chromatography, differential scanning calorimetry, and scanning electron microscopy) were employed to study the mechanisms of degradation…
Transparent smooth and crack-free BaTiO3 thin films were deposited on stainless steel, fused silica, platinum plates, and platinized silicon wafers (100) using the sol-gel process. Barium 2-ethyl hexanoate and titanium isopropoxide were used as precursors. Annealing of the films at 750 °C for 2 h was necessary to get…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFerrocenyl substituted octakis(dimethylsiloxy)octasilsesquioxanes: a new class of supramolecular organometallic compounds. Synthesis, characterization, and electrochemistryMoises Moran, Carmen M. Casado, Isabel Cuadrado, and Jose LosadaCite this: Organometallics 1993, 12, 11…
The structure of liquid dimethylsulphoxide (DMSO) at 25 °C is explored using a combination of neutron diffraction with isotope substitution and computer simulation techniques. The potentials used in the computer simulation consist of Coulomb and 6-12 Lennard-Jones interactions for each of the carbon, oxygen, and sulfu…