Materials Literature
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The heterogeneous oxidation of methane-air mixture in a honeycomb catalytic reactor is investigated numerically in the present study. An improved multi-step surface reaction mechanism for methane oxidation on platinum is proposed so that surface ignition of lean methane-air mixtures is better modeled. First, this surf…
Research Article| January 01, 2000 Rigid Unit Modes in Framework Structures: Theory, Experiment and Applications Martin T. Dove; Martin T. Dove Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EQ, UK Search for other works by this author on: GSW Google Scholar Kostya O. Trachenko;…
Perovskite-type phases SrFe1–xTixO3–y with 0.1 ≤ x ≤ 0.7 have been prepared from the oxides, and, in order to reach high oxygen contents and FeIV fractions, annealed at oxygen pressures of 60 MPa. The materials were characterised by powder x-ray and neutron diffraction, 57Fe Mössbauer spectroscopy, and magnetic suscep…
A general photochemical synthesis of large thiohelicenes containing nine and eleven rings is discussed along with the organisation of racemic thiohelicenes in crystals: heterochiral assembling is dominant except in the nine-ring system where interactions involving terminal ring S atoms favour the segregation of close-…
A new class of mesostructured semiconducting materials, M-Ge-Q (Q=S, Se), has been synthesized using aqueous electrostatic supramolecular self-assembly. The pores in these mesostructured materials are adjustable and are filled with surfactant molecules (see Figure) which can be removed by heating in an inert atmospher…
Trimesic acid and various alkylamines assemble into ordered two-dimensional hexagonal hydrogen-bonded networks in both bulk crystals and at the air/water interface.
Monte Carlo simulations of polyethylene (PE) melts and thin films have previously been performed on the second nearest neighbor diamond (2nnd) lattice by including short and long range interactions. A fiber can be obtained from equilibrated thin film snapshots by increasing another (normal to thin film plane) periodic…
The effectiveness of the combination of long-circulating, thermosensitive liposomes and hyperthermia is described. Small-sized, thermosensitive liposomes that encapsulate doxorubicin (DXR-PEG-TSL (SUV)) have a prolonged circulation time and are extravasated to targeted solid tumors in vivo, where they preferentially r…
The reaction of iron(III) ion with chloranilic acid (2,5-dichloro-3,6-dihydroxycyclohexa-2,5-diene-1,4-dione) in hot aqueous solution in air generated a product in which the iron, surprisingly, is in the +II oxidation state as is indicated by structural, magnetic and Mössbauer spectral studies. Single crystal X-ray st…
Investigation of thermal stability at 300-550/spl deg/C for the newly developed Sm(Co/sub w/Fe/sub v/Cu/sub x/Zr/sub y/)/sub z/ high temperature magnets is reported in this paper. Three factors are responsible for the irreversible losses at high temperatures. One factor is the loss associated with a nonlinear inductio…
This overview introduces the contributions in this Special Issue with the aim of presenting an integrated picture of it. The contributions cover several important areas: protein stability and function under extreme conditions, osmotic stress and osmoadaptation, the structural features of the cell membrane and their po…
Abstract Corrosion problems can be divided into eight categories based on the appearance of the corrosion damage or the mechanism of attack: uniform or general corrosion; pitting corrosion; crevice corrosion, including corrosion under tubercles or deposits, filiform corrosion, and poultice corrosion; galvanic corrosio…
The blend of a gelatinized starch and poly(ε-caprolactone) (PCL) was prepared and the effect of starch gelatinization on the mechanical properties of the blend was studied. The gelatinization of starch resulted in good dispersion of the starch in the PCL matrix and a higher modulus and strength of the blend. The mecha…
Buku ini membahas tentang: 1 Struktur dan Pengikat Atom 2 Susunan Atomik dalam Material 3 Fasa-fasa Struktural: Pembentukan dan Tranisisnya 4 Cacat dalam Pandatan 5 Karakterisasi Material 6 Sifat Fisis Material 7 Perilaku Mekanik Material
A (thienylene–dialkoxyphenylene) copolymer has been prepared by using an organometallic condensation reaction between a bis(stannyl)thiophene reagent and a substituted dibromobenzene derivative in the presence of a palladium catalyst. The grafting of 2-butoxyethoxy substituents gave the polymer a good solubility in mo…
The specific intensity in mid infrared band (2 µm–5 µm) and mass burn rate of MTV compositions is investigated with respect to stoichiometry.
The chiroptical properties of a novel, optically active regioregular poly[3-(4-((R)-4-ethyl-2-oxazolin-2-yl)phenyl)thiophene] (poly-1) were investigated in mixtures of a good solvent, chloroform, and a variety of poor solvents using CD spectroscopy. Most poor solvents induced CD on poly-1 with similar Cotton effects,…
The ratio of the photoionization cross section of the transition to that of the O 1s electrons is determined as 2.16 ± 0.02 for the Al Kα X‐ray excitation. Application of this value is limited to oxidic Mg. Based on the above ratio, the photoionization cross section ratio of the Mg 2p electrons to the O 1s electrons,…
Electrospray time-of-flight mass spectrometry was used to study dilute (10(-3) M) solutions of tungstate, vanadate and perrhenate oxyanions under acidic and basic conditions. The electrospray mass spectra of tungstate and vanadate solutions indicate the presence of protonated monomeric oxyanions in basic solution (pH…
A new chiral ligand based on the condensation of 4-diethylaminosalicylaldehyde with (1R,2R)-(+)-1,2-diphenylethylenediamine (H2L2) is reported along with its nickel(II) complex. The diamagnetic NiL2 complex exhibits an efficiency 13 times that of urea in second harmonic generation at 1.9 µm. The structure–property rel…