Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Abstract The NH 3 /NO 2 system has been investigated experimentally in an isothermal flow reactor in the temperature range 850–1350 K. The experimental data were interpreted in terms of a detailed reaction mechanism. The flow reactor results, supported by a theoretical analysis of the NH 2 NO 2 complex, suggest that…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMorphology of Polymer-Stabilized Liquid CrystalsC. V. Rajaram, S. D. Hudson, and L. C. ChienCite this: Chem. Mater. 1995, 7, 12, 2300–2308Publication Date (Print):December 1, 1995Publication History Published online1 May 2002Published inissue 1 December 1995https://pubs.acs.…
The topological stability of emulsions of liquid crystal in water (glycerol) matrices is demonstrated for a wide range of materials and concentrations. Coalescence is prevented by an energy barrier for a topological ring defect formation in a neck between the two merging droplets. There is a characteristic size of emu…
Cyclooctapyrroles such as 1–3 tend to form during the condensation of dipyrrolic units if cyclization to cyclotetrapyrroles is hindered for conformational reasons. These macrocycles are chiral and might afford interesting complexes with metal ions. Their most intriguing feature is their unusual figure-eight conformati…
CO chemisorption has been studied on TiO2(110) under surface conditions where oxygen anion vacancy sites are not present (oxidized surface), compared to conditions where the vacancy sites are present (annealed surface). The binding energy of CO on the nondefective TiO2(110) surface is 9.9 kcal/mole in the limit of zer…
Diffraction-deformation electron-density (Δp) images for small, naturally faced single crystals of synthetic calcite (CaCO 3 ), magnesite (MgCO 3 ) and mineral rhodochrosite (MnCO 3 ) were measured with focused λ = 0.7 and 0.9 A synchrotron (SR) X-radiation. Mo Kα (λ = 0.71073 A) structure factors were also measured f…
Abstract A new method for the regulation of the photophysical properties of highly conjugated porphyrin arrays is described. The absorptive and emissive signatures of such supramolecular structures can be modulated to an impressive degree by regulation of: i) the extent of the steric interactions that define the barri…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMagnetic Exchange through Oxalate Bridges: Synthesis and Characterization of (.mu.-Oxalato)dimetal(II) Complexes of Manganese, Iron, Cobalt, Nickel, Copper, and ZincJorgen Glerup, Patricia A. Goodson, Derek J. Hodgson, and Kirsten MichelsenCite this: Inorg. Chem. 1995, 34, 2…
Abstract An improved model for the interpretation of thermal effects during dehydroxylation in aluminous dioctahedral 2:1 layer phyllosilicates considers trans- vacant (tv) and cis- vacant (cv) 2:1 layers and leads to very different temperatures of dehydroxylation for these tv and cv vacant modifications. In particula…
Anthracyclines entrapped in small-sized, sterically stabilized liposomes have the advantage of long circulation time, reduced systemic toxicity, increased uptake into systemic tumors, and gradual release of their payload. To date, there is no information on the behavior of these liposomes in brain tumors. The objectiv…
Knowledge of the exchange kinetics of O 2 in SrTiO 3 allows us to design appropriate strategies to separate the ionic and the electronic conductivity. In the low‐temperature range, where the overall surface reaction is very slow compared to bulk diffusion and measuring time, electrochemical cells of the type Pt|SrTiO…
The deformation electron-density (dynamic Fourier) maps and the anharmonicity of atomic displacements in strontium titanate, SrTiO 3 (Gram-Charlier model), were studied by high-precision single-crystal X-ray diffraction analysis at 145(1) and 296(2) K. Space group Pm3m, cubic, λ(Mo Kα) = 0.71069 A, Z = 1, F(000) = 84,…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCryo-TEM and SANS Microstructural Study of Pluronic Polymer SolutionsKell Mortensen and Yeshayahu TalmonCite this: Macromolecules 1995, 28, 26, 8829–8834Publication Date (Print):December 1, 1995Publication History Published online1 May 2002Published inissue 1 December 1995ht…
The absorption and emission properties of numerous glasses doped with ${\mathrm{Yb}}^{3+}$ ions have been investigated. The emission cross sections have been evaluated using the measured absorption spectra and principle of reciprocity, and again using the Fuchtbauer-Ladenburg formula. Agreement between the two methods…
Abstract Mackinawite, tetragonal FeS, has been synthesised by reacting iron with Na 2 S solutions. A Rietveld structure refinement of X-ray powder diffraction data, recorded using X-rays monochromated from synchrotron radiation with a wavelength of 0.6023 Å, has been performed. The structure has been refined in the te…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolarized Laser Induced Holographic Surface Relief Gratings on Polymer FilmsD. Y. Kim, Lian Li, X. L. Jiang, V. Shivshankar, J. Kumar, and S. K. TripathyCite this: Macromolecules 1995, 28, 26, 8835–8839Publication Date (Print):December 1, 1995Publication History Published on…
The properties of an oxyfluoride glass ceramic that possesses high transparency after ceramming are described. Approximately 25 vol % of this material is comprised of cubic, fluoride nanocrystals and the remainder is a predominantly oxide glass. When doped with Pr+3, the fluorescence lifetime at 1300 nm is longer than…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAnaerobic Corrosion of Granular Iron: Measurement and Interpretation of Hydrogen Evolution RatesEric J. ReardonCite this: Environ. Sci. Technol. 1995, 29, 12, 2936–2945Publication Date (Print):December 1, 1995Publication History Published online1 May 2002Published inissue 1…
ABSTRACT Two species of diatoms were genetically transformed by introducing plasmid vectors containing the Escherichia coli neomycin phosphotransferase II (npt II ) gene. Expression of the bacterial npt II gene in the diatoms was achieved using the putative promoter and terminator sequences from the acetyl‐CoA carboxy…
Other| December 01, 1995 An experimental study of element partitioning among biotite, muscovite, and coexisting peraluminous silicic melt at 200 MPa (H2O) Jonathan Icenhower; Jonathan Icenhower University of Oklahoma, School of Geology and Geophysics, Norman, OK, United States Search for other works by this author on:…