Materials Literature
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Interfacial interaction is one of the most critical issues in carbon nanotube/polymer composites. In this paper the role of nonionic surfactant is investigated. With the surfactant as the processing aid, the addition of only 1 wt % carbon nanotubes in the composite increases the glass transition temperature from 63 °C…
Cdc42Hs is a member of the Ras superfamily of GTPases and initiates a cascade that begins with the activation of several kinases, including p21-activated kinase (PAK). We have previously used a 46 amino acid fragment of PAK (PBD46) to define the binding surface on Cdc42Hs [Guo et al. (1998) Biochemistry 37, 14030-1403…
The radius of gyration 〈 S 2 〉 1/2, hydrodynamic radius R H, intrinsic viscosity [ η ], and second virial coefficient A 2 for cellulose tris(phenyl carbamate) (CTC) in tetrahydrofuran (THF) at 25 °C were determined in a wide range of molecular weights, 1.91 × 10 4 to 392 × 10 4, by static and dynamic light scattering…
The method of self-consistent Brownian dynamics developed recently has been adapted to simulate the properties of bimodal polymer brushes under shear. Simulations of three systems with different compositions have been carried out for a range of shear rate values. In the absence of shear, the free ends of short and lon…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTToward Structural Biology in Supercooled WaterJack J. Skalicky, Dinesh K. Sukumaran, Jeffrey L. Mills, and Thomas SzyperskiView Author Information Department of Chemistry State University of New York at Buffalo Buffalo, New York 14260 Cite this: J. Am. Chem. Soc. 2000,…
Rice husk ash was incorporated into natural rubber (NR) using a laboratory size two-roll mill. Curing using a conventional vulcanization system (CV) was chosen, and cure studies were carried out on a Monsanto rheometer. Physical testing of the NR vulcanizates involved the determination of tensile, tear, and abrasion r…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTSpin Alignment in Singly Oxidized Spin-Polarized Diradical Donor: Thianthrene Bis(nitronyl nitroxide)Akira Izuoka, Mayumi Hiraishi, Taro Abe, Tadashi Sugawara, Kazunobu Sato, and Takeji TakuiView Author Information Department of Basic Science Graduate School of Arts an…
An organic molecule containing cobalt phosphate (denoted CoPO-GIS) which is isostructural with the zeolite gismondine has been synthesized under solvothermal conditions by using [Co(en)3]Cl3 and phosphoric acid as the reactants and ethylene glycol as the solvent. CoPO-GIS ((H3NCH2CH2NH3)0.5.CoPO4) crystallizes in the…
Red-colored and solvent-free membranes based on the picket fence cobaltporphyrin (CoP) complexed with two or three kinds of polymer−ligands were prepared, and their visible absorbance responses to oxygen partial pressure were studied. The four CoP complexes with copolymers of 4- and 1-vinylimidazole and 4- and 2-vinyl…
Effects of the superconducting pair potential on the impurity scattering processes in metallic carbon nanotubes are studied theoretically. The backward scattering of electrons vanishes in the normal state. In the presence of the superconducting pair correlations, the backward scatterings of electron- and hole-like qua…
The information revolution would have been radically different, or impossible, without the use of the materials known generically as semiconductors. The properties of these materials, particularly the potential for doping with impurities to create transistors and diodes and controlling the local potential by gates, ar…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTEpoxidation of Alkenes with Bicarbonate-Activated Hydrogen PeroxideHuirong Yao and David E. RichardsonView Author Information Center for Catalysis, Department of Chemistry University of Florida, Gainesville, Florida 32611-7200 Cite this: J. Am. Chem. Soc. 2000, 122, 13…
The structure of the title compound, C(11)H(13)NO(3), is characterized by a two-dimensional infinite network of intermolecular N-H.O and O-H.O hydrogen bonds.
The synthesis of new acrylate, methacrylate, and styrene with 4-(oxyethoxy)-4′-vinylbarbituratephenyl azobenzene chromophore are described. The monomers were well characterized (NMR, UV, and IR) for the structure. These were then homopolymerized and characterized for spectral responses and thermal properties. The stro…
A π/2 and 5π/2 twist bistable nematic liquid crystal cell is optimized in optics by a parameter space approach. The cell possesses good contrast ratio, a preferable dΔn value, a wide viewing angle, and black–white display. Three switching wave forms can be used to switch the cell between π/2 and 5π/2 twist states. Con…
In this Letter a novel passivation method for porous silicon (PS) surfaces, i.e., depositing diamond film on a PS surface by microwave plasma assisted chemical vapour deposition (MPCVD) method, is reported. The morphologies, structure and PL of CVD diamond film coated PS were characterized using scanning electron micr…
Electronic-structure calculations have been carried out for hexagonal NiS with the use of the full-potential linearized augmented plane-wave (FLAPW) method in the local-spin-density approximation + U (LSDA+ U ) approach. The U parameter is treated as an empirical parameter to improve the band structure near the Fermi…
We recently identified the phaGPp gene encoding (R)-3-hydroxydecanoyl-ACP:CoA transacylase in Pseudomonas putida, which directly links the fatty acid de novo biosynthesis and polyhydroxyalkanoate (PHA) biosynthesis. An open reading frame (ORF) of which the deduced amino acid sequence shared about 57% identity with Pha…
The magnetic and electric properties of the vanadate PrVO 3 with the GdFeO 3 -type orthorhombic structure are reported. The temperature-dependent magnetization displays an obvious irreversibility under zero-field cooling (ZFC) and field cooling (FC), and two magnetic phase-transition temperatures 20 K and 90 K, which…
Formation of a graphite monolayer and an intercalationlike compound at the surface of the La/graphite system annealed at temperatures between 180 \ifmmode^\circ\else\textdegree\fi{}C and 900 \ifmmode^\circ\else\textdegree\fi{}C was studied by C $1s$ photoemission, high-resolution electron energy loss spectroscopy as w…