Materials Literature
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OBJECTIVE: To improve the in vitro anti-HIV-1 activity, intracellular accumulation in macrophages and in vivo pharmacokinetics and tissue distribution of foscarnet (trisodium phosphonoformate; PFA) by encapsulation in liposomes. METHODS: The accumulation of free and liposome-encapsulated PFA was determined in monocyte…
The switching, fatigue and rejuvenation phenomena of ferroelectric PZT thin films with differently processed electrode-PZT interfaces and of different thicknesses have been investigated. The ferroelectric contribution to the switching parameters has been isolated from the leakage current contribution, thus allowing th…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSeeing the Long-Sought Intermediate in the Reaction of Oxoiron(IV) Porphyrin Cation Radicals with OlefinsZeev Gross and Shay NimriCite this: J. Am. Chem. Soc. 1995, 117, 30, 8021–8022Publication Date (Print):August 1, 1995Publication History Published online1 May 2002Publish…
Escherichia coli serine hydroxymethyltransferase is a 94-kDa homodimer. Each subunit contains a covalently attached pyridoxal-P, which is required for catalytic activity. At which step pyridoxal-P binds in the folding pathway of E. coli serine hydroxymethyltransferase is addressed in this study. E. coli serine hydroxy…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBond Resonance Energies and Kinetic Stabilities of Charged FullerenesJun-ichi AiharaCite this: J. Phys. Chem. 1995, 99, 34, 12739–12742Publication Date (Print):August 1, 1995Publication History Published online1 May 2002Published inissue 1 August 1995https://pubs.acs.org/doi…
Abstract The Sinya Beds of the Amboseli Basin in Tanzania and Kenya consist largely of carbonate rocks and Mg-rich clays that are intensely deformed where exposed in and near former meerschaum mines. The carbonate rocks consist of limestone and dolomite in Tanzania, but only dolomite has been identified in Kenya. Sepi…
The problem of quenching the luminescence associated with interatomic radiative transitions from the valence band to the deeper lying core level is studied for ${\mathrm{BaF}}_{2}$, which is known to be the fastest inorganic scintillator. The measurements of excitation spectra and time decay kinetics of the fast fluor…
Synthetic Diamond Electrodes: Photoelectrochemical Investigation of Undoped and Boron‐Doped Polycrystalline Thin Films, Sakharova, A. Ya., Pleskov, Yu. V., Di Quarto, F., Piazza, S., Sunseri, C., Teremetskaya, I. G., Varnin, V. P.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and Structure of Phosphorus(V) Octaethylporphyrins That Contain a .sigma.-Bonded Element-Carbon Bond: Characterization of a Porphyrin Bearing an R-P:O Bond and Relation of the Ruffling of the Porphyrin Core with the Electronegativity of the Axial LigandsYohsuke Yam…
The polyhydroxyalkanoic acid (PHA) biosynthetic gene locus was cloned and characterized from an Acinetobacter sp. isolated from activated sludge. Nucleotide sequence analysis identified three clustered genes, phaAAc (encoding a beta-ketothiolase), phaBAc (encoding an acetoacetyl coenzyme A reductase), and phaCAc (enco…
The Ag content in Ag–As–S glasses can be spatially modified by illumination of visible light. Optical and thermal studies demonstrate that the Ag-content modification is caused by Ag+ ionic migration from the dark to the illuminated region in a sample. The migration can be reversed by changing the illuminated region.…
This paper reports the details of a high-pressure and -temperature in situ transmission infrared reactor cell and experimental approaches for investigation of the nature of adsorbates in CO hydrogenation and NO-CO reaction on Rh/SiO 2 catalyst. The infrared cell used in this study allows easy assembling and reliable o…
Abstract The molecular weight (MW) and the molecular weight distribution (MWD) of polyethylene (PE) prepared with various metallocene catalysts were investigated. The weight‐average molecular weight ( M w ) of PE prepared with dicyclopentadienyltitanium dichloride/aluminoxane (Cp 2 TiCl 2 /MAO) was about 4,0 · 10 5 ,…
We derive an expression for the inverse longitudinal dielectric function ${\mathrm{\ensuremath{\varepsilon}}}^{\mathrm{\ensuremath{-}}1}$(k,\ensuremath{\omega}) of a random system of identical spherical particles with dielectric function ${\mathrm{\ensuremath{\varepsilon}}}_{1}$(\ensuremath{\omega}) in a host with die…
Palladium acetate vapor was sublimed at a reduced pressure and was evacuated through the porous wall of an α-alumina support tube of 1.8 mm i.d. and 2.4 mm o.d. Due to chemical vapor deposition (CVD), a thin palladium membrane was formed in macropores of the support. The membrane part was about 50 mm in length and was…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNature of the Relaxation Processes in the Supercooled Liquid and Glassy States of Some CarbohydratesGangasharan and S. S. N. MurthyCite this: J. Phys. Chem. 1995, 99, 32, 12349–12354Publication Date (Print):August 1, 1995Publication History Published online1 May 2002Publishe…
The stability range at room temperature of the orthorhombic phase of ${\mathrm{KNbO}}_{3}$ was investigated under pressure using optical observation and Raman scattering techniques. It was observed that the ferroelectric orthorhombic solid is stable up to the 9--10 GPa pressure range, where it transforms to the parael…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDithiadiazafulvalenes-New Strong Electron Donors. Synthesis, Isolation, Properties, and EPR StudiesGregory V. Tormos, Martin G. Bakker, Ping Wang, M. V. Lakshmikantham, Michael P. Cava, and Robert M. MetzgerCite this: J. Am. Chem. Soc. 1995, 117, 33, 8528–8535Publication Dat…
Abstract Poly(trimethylene terephthalate) was synthesized on a semi‐technical scale following the trans‐esterification route. Ester exchange as well as polycondensation were catalyzed by titanium tetrabutylate. The polymer formed shows a remarkable degree of whiteness, contrary to poly(ethylene terephthalate) when syn…
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