Materials Literature
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Manganese oxides and iron-manganese oxides supported on TiO2 were prepared by the sol-gel method and used for low-temperature selective catalytic reduction (SCR) of NO with NH3. Base on the previous study, Mn(0.4)/ TiO2 and Fe(0.1)-Mn(0.4)/TiO2 were then selected to carry out the in situ diffuse reflectance infrared t…
Abstract Poly(vinyl alcohol) (PVA) fibrous mats dealt with polyoxometalate containing vanadium were prepared by electrospinning method. The fibrous mats were characterized by infrared spectra, X‐ray powder diffraction patterns, and scanning electron microscopy photographs. The results showed that PVA could combine wit…
We use the Gutzwiller variational many-body theory to investigate the stability of orbitally ordered states in a two-band Hubbard model without spin degrees of freedom. Our results differ significantly from earlier Hartree–Fock calculations for this model. The Hartree–Fock phase diagram displays a large variety of orb…
Abstract In this study, optimum condition for the reaction of glycidyl methacrylate (GMA), epichlorohydrin (ECH), and propylene oxide (PO) with oil palm empty fruit bunch (EFB) were determined. The treated EFB was characterized using Fourier transform infrared (FTIR), wide‐angle X‐ray diffraction (WAXD), and different…
Succinyl-CoA synthetase has a highly conserved cysteine residue, Cys123alpha in the Escherichia coli enzyme, that is located near the CoA-binding site and the active-site histidine residue. To test whether the succinyl moiety of succinyl-CoA is transferred to the thiol of Cys123alpha as part of the catalytic mechanism…
Abstract The effects of ultrasonic oscillations on the die pressure, productivity of extrusion, melt apparent viscosity, melt surface appearance, and die swell of novel propylene‐based plastomers were studied in a specially designed ultrasonic oscillations extrusion system developed in our laboratory. The effects of u…
The structure of Ba(3)BaSb(2)O(9) is reported for the first time as a high-temperature phase with an ideal hexagonal BaTiO(3)-type structure (space group P6(3)/mmc) and Rietveld-refined against high-temperature synchrotron X-ray powder diffraction data. The structure is remarkable for the extreme size difference betwe…
Abstract In this paper, short carbon‐fiber‐reinforced nylon 6/clay nanocomposites are prepared via melt compounding, and fiber breakage and dispersion during processing are studied. The influences of clay and processing conditions on fiber breakage and dispersion are taken into consideration. It is found that the pres…
We present a hybrid method to investigate the isotropic-nematic (I-N) transition in athermal solutions of rod-coil copolymers. This method incorporates the scaled-particle theory for semiflexible chains with two-chain Monte Carlo simulation for the osmotic second virial coefficient and for the angle-dependent excluded…
Hollow needles can be produced by immersing certain hydrate crystals in alcohol solution (methanol or ethanol). The fact that these anhydrate needles are hollow was proven by confocal fluorescence microscopy. For one material (sodium 2-keto- l -gulonate anhydrate) it is shown here that the internal diameter can be con…
We present experimental measurements of the cholesteric-smectic phase transition of suspensions of charged semiflexible rods as a function of rod flexibility and surface charge. The rod particles consist of the bacteriophage M13 and closely related mutants, which are structurally identical to M13, but vary either in c…
Abstract Covalently crosslinked networks based on poly(propylene glycol) bis(acetoacetate) with either neopentyl glycol diacrylate or hydroxyethyl acrylate derivatized bis(4‐isocyanatocyclohexyl)methane (HMDI) were prepared utilizing the Michael addition reaction in the presence of catalytic quantities of diazabicyclo…
Superoxide dismutase (SOD) from Potentilla atrosanguinea (Wall. ex. Lehm.) was crystallized using 20% PEG 3350 and 0.2 M ammonium iodide and diffraction data were collected to 2.36 A resolution using an in-house Cu Kalpha X-ray source. Analyses show that data with a redundancy of 3.2 were sufficient to determine the s…
We have performed detailed time-, field-, and temperature-dependent magnetic measurements on Cr-doped InN films, a dilute magnetic semiconductor (DMS) material which exhibits long range magnetic order above room temperature. We find a metastable magnetic behavior rather than common ferromagnetism. The temperature depe…
Abstract A temperature and strain rate dependent model for the thermoforming process of amorphous polymer materials is proposed. The polymeric sheet is heated at a temperature above the glass transition temperature then deformed to take the mold shape by the means of an applied pressure. The applied process temperatur…
Abstract This work describes six novel aromatic polyamides with bulky pendant groups, each having a polyisophthalamide backbone substituted with different urea groups in ring position 5 of the diacid or the diamine residue. Thus, one of the nitrogen atoms of the urea is chemically anchored to the main rigid polyamide…
The charge-ordered domain structure of $\mathrm{Yb}{\mathrm{Fe}}_{2}{\mathrm{O}}_{4}$ has been studied by energy-filtered transmission electron microscopy. Dark-field imaging by using a spot of diffuse scattering revealed nanometer-sized charge-ordered domains. The domain size, which represents the approximate correla…
Monte Carlo computer simulation has been used to interpret and model observed single-crystal diffuse X-ray scattering data for pentachloronitrobenzene, C(6)Cl(5)NO(2). Each site in the crystal contains a molecule in one of six different basic orientations with equal probability. However, no short-range order amongst t…
Abstract Polycarbazole (PCz) thin films have been synthesized by electrochemistry. The influence of the deposition technique, potentiostatic or potentiodynamic, on the properties of the PCz films has been studied using the deposition time and the potential maximum as parameters. The PCz films have been characterized b…
The L-2-haloacid dehalogenase enzymes catalyse the hydrolytic cleavage of a halogen from the C2 position of short-chain haloacids. The recombinant dehalogenase from the thermophilic archaeon Sulfolobus tokodaii has been cloned, overexpressed and purified to homogeneity. The 24 kDa enzyme was crystallized using the mic…