Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and properties of an n-self-doped conducting polymerN. Zhang, R. Wu, Q. Li, K. Pakbaz, C. O. Yoon, and F. WudlCite this: Chem. Mater. 1993, 5, 11, 1598–1599Publication Date (Print):November 1, 1993Publication History Published online1 May 2002Published inissue 1 No…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMolybdenum oxo nitrosyl complexes. 1. Defect Lindqvist compounds of the type [Mo5O13(OR)4(NO)]3- (R = CH3, C2H5). Solid-state interactions with alkali-metal cationsAnna Proust, Pierre Gouzerh, and Francis RobertCite this: Inorg. Chem. 1993, 32, 23, 5291–5298Publication Date…
Development of Typic Haplorthods in a heathland area in Denmark responded over a short period of time (decades) to changes of vegetation. Part of the heath, Hjelm Hede, was left undisturbed and was invaded by trees, mainly oak and a few aspen and conifers. Another part of the heath was planted with Norway and Sitka sp…
The equilibrium atomic structure of the (101) and (301) twin boundaries in rutile (TiO2) has been computed using an ionic shell model and compared with high resolution electron microscopy images of the same boundaries using image simulation. The lowest-energy (101) twin boundary structure is characterized by an in-pla…
A study of the two-dimensional rotational magnetic properties of a steel sheet are discussed. These are measured making use of the vector relation between magnetic field strength H and magnetic flux density B. The results of this study lead to the following main conclusions: the permeability tensor becomes a full matr…
The red-violet, liquid-crystalline dye 1, which shows an extraordinarily broad mesophase, is obtained by twofold [2 + 4] cycloaddition of 3,5-dioxotriazoles to alkyl-substituted perylenes. These soluble compounds allow the use of a perylene pigment as a mesogen for the first time. R = n-CxHx + 1 (x = 5, 12, 18); R′ =…
Errors in partial discharge (PD) location on high voltage dielectric cables caused by both mechanical and electrical phenomena are discussed. The sources of error relevant to PD location include errors in measuring time delays, scatter caused by noise and disturbances, pulse propagation distortion, errors in cable len…
Abstract Reversible oligomerization of distributions of molecules yields distributions of monomers, dimers, trimers, tetramers and higher‐order oligomers. The distributions can be functions of molecular weight, carbon number, or other variables that may be considered continuous. Rate expressions are formulated for the…
Electrochemical techniques were used to study the inhibition effects of molybdate (MoO42–), MoO42–+ nitrite (NO2–), MoO42– + tolyltriazole (TTA, CH3C6H4N3H), and MoO42– + NO2–+ TTA on the general and pitting/crevice corrosion of carbon (C) steel and some copper (Cu) alloys common to component cooling water systems (CC…
The structure of an activated quaternary complex of ribulose 1,5-bisphosphate carboxylase/oxygenase (rubisco) from Synechococcus PCC6301 has been solved by molecular replacement. The protein crystallizes in an orthorhombic P2(1)2(1)2(1) unit cell with a complete L(8)S(8) complex consisting of 4608 residues (37 680 non…
Serine hydroxymethyltransferase has a conserved lysine residue (Lys-229) that forms the internal aldimine with pyridoxal 5'-phosphate. In other pyridoxal 5'-phosphate enzymes investigated so far, this conserved lysine residue also plays a catalytic role as a base that removes the alpha-proton from the amino acid subst…
Electron propagator calculations on the vertical and adiabatic ionization energies of BO2− yield structural information on ground and excited states of BO2. Analytical gradient techniques for BO2 geometry optimizations and renormalized self-energies for the evaluation of vertical ionization energies are employed. The…
A technique for measuring B-H curves of grain-oriented silicon steel along arbitrary directions has been developed. As the control of waveform is not necessary in this technique, it is possible to measure B-H curves up to high flux densities which are required for calculating flux distribution using the finite element…
Abstract A high‐temperature radical scavenger, 2,2‐diphenyl‐l‐picryl hydrazyl (DPPH), has been used to study the reaction mechanisms of polyacrylonitrile (PAN) on thermal treatment. The effect of DPPH on the cyclization reaction of PAN in both air and nitrogen, investigated by differential scanning calorimetry (DSC),…
The thermal behavior of flame retardant jute fabrics impregnated with a diam monium hydrogen phosphate (DAP) and urea (1:2) solution was studied using dif ferential scanning calorimetry ( DSC ) and thermogravimetric ( TG ) analysis in nitrogen and air atmospheres. Thermal degradation of flame retardant jute fabrics gr…
The sulfate‐reducing bacteria (SRB)‐enhanced corrosion of mild steel in the presence of 1.5 mg·l−1 dissolved oxygen (DO) in bulk liquid was investigated. The biofilm process analysis was combined with microelectrode measurements, electrochemical measurements, and surface analysis. In the early stages of biofilm accumu…
Point-defect energetics and diffusion mechanisms in graphite are investigated using a semi-empirical tight-binding-force model. Possible diffusion processes associated with point-defect (i.e., vacancies and interstitials) and nondefect (i.e., atomic exchange) mechanisms are analyzed. It is found that self-diffusion in…
Abstract Polycrystalline samples of perovskite‐structured BaCeO 3 and SrCeO 3 were studied by Raman scattering spectroscopy in the temperature range 77–983 K. Changes in the spectra of BaCeO 3 with temperature are explained in terms of a second‐order phase transition ( D 2 h → D 4 h ) at T 0 = 427 K. Analysis of the t…
Absorption and magnetic circular dichroism (MCD) spectra are reported for the metallophthalocyanine-N-isologs: magnesium-3,4-pyridinoporphrazine (MgPcN 4 (−2)), zinc-3,4-pyridinoporphyrazine (ZnPcN 4 (−2)), and zinc-3,4-pyridazinoporphyrazine (ZnPcN 8 (−2)). Band deconvolution calculations, which couple both the absor…
Solubilized silk fibroin (SF) in 0.1 M borate buffer (pH 9.4) was modified with 2-O-[methoxy(polyethylene glycol)]-4,6-dichloro-s-triazine (actPEG1) at 4 degrees C. The weight of the modified SF (PEG1-SF) was at least 3.2 times that of the starting material SF. Amino acid analysis of PEG1-SF suggested that the nucleop…