Materials Literature
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A vibratory-type cavitation test rig was constructed to study the effect of polarizing currents applied to a cavitating body. The generation of gas by electrolysis reduced mechanical damage suffered by a cavitating body because of bubble collapse cushioning. However, the net effect on overall damage depended on severa…
Abstract The title complexes, [Yb2(obPc)3] (1) and [Dy2(obPc)3] (2) (H2obPc = 2,3,9,10,16,17,23,24-octabutoxyphthalocyanine), were prepared. Their absorption spectra in CH2Cl2 and in benzene and cyclic voltammograms in CH2Cl2 were measured. The electromism of the CH2Cl2 solutions of 1 and 2 was observed in oxidation.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA new hydrotalcite-like compound containing vanadium(3+) ions in the layersVicente Rives, Francisco M. Labajos, Maria A. Ulibarri, and Pilar MaletCite this: Inorg. Chem. 1993, 32, 23, 5000–5001Publication Date (Print):November 1, 1993Publication History Published online1 May…
Abstract Infrared reflectance and Raman spectra of LBO crystals were recorded at room temperature and liquid nitrogen temperature. The vibrational modes are classified by the factor group analysis method and the spectral bands are assigned to vibrations of the (B 3 O 6 ) 3− ring and BO 4 tetrahedra.
Stress corrosion cracking of type 304 and type 316 austenitic stainless steels has been investigated as a function of chloride ion concentration in 0.82 kmol m−3 pure sulfuric acid solution at 353 K under a constant stress of 392 MPa by using a constant load method. At a concentration of up to approximately 2 × 10−2 k…
The evolution of x-ray photoelectron and ultraviolet spectra and their modification at the phase transformation B2-B19(B19') of equiatomic TiM and quasibinary Ti(Ni,M) compounds, where M stands for Fe, Co, Ni, Pd, Pt, Au, and Cu, are presented. Investigation of x-ray photoemission spectroscopy includes valence bands,…
Transparent glass‐ceramics containing ZnAl 2 O 4 :Co 2+ and LiGa 5 O 8 :Co 2+ crystallites have been prepared by heat treatment of glasses in the zinc aluminosilicate and lithium gallate silicate systems, respectively. Crystalline LiGa 5 O 8 was already precipitated in an as‐prepared specimen, while ZnAl 2 O 4 :Co 2+…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHigh-resolution microscopy of PMDA-ODA polyimide single crystalsJaime R. Ojeda and David C. MartinCite this: Macromolecules 1993, 26, 24, 6557–6565Publication Date (Print):November 1, 1993Publication History Published online1 May 2002Published inissue 1 November 1993https://…
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…