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Abstract The corrosion inhibition of mild steel in 1N sulphuric acid containing various concentrations of indole was studied in the temperature range of 25–70°C through the use of potentiodynamic polarization curves. The indole was found to shift the corrosion potentials to positive values and to decrease the dissolut…
Porous cathodes of NiO ( Li ) , Co‐doped LiFeO 2 , and LiCoO 2 for the molten carbonate fuel cell (MCFC) were examined in a comparative study using electrochemical impedance spectroscopy at temperatures of 923, 973, and 1023 K. Using this technique the contributions of charge transfer and diffusion to the impedance co…
Abstract The main approaches that have been taken to chemically modify polymer surfaces are introduced and reviewed. These are wet chemical oxidation, plasma treatment, classical organic chemistry, and attachment of polymer chains. The extent to which each of these approaches can produce the specific modifications des…
Research Article| December 01 1994 Expression and functional properties of fumarate reductase J J Van Hellemond; J J Van Hellemond 1Laboratory of Veterinary Biochemistry, Utrecht University, The Netherlands. Search for other works by this author on: This Site PubMed Google Scholar A G M Tielens A G M Tielens 1Laborato…
Measurements of fabric-to-skin friction have shown that glabrous and hairy skin behave differently when the skin is wet. Moisture on the skin is more important than the fiber type or the fabric construction parameters tested in these experiments in determining fabric-to-skin friction.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTZintl Phases in Alkali-Metal-Tin Systems: K8Sn25 with Condensed Pentagonal Dodecahedra of Tin. Two A8Sn44 Phases with a Defect Clathrate StructureJing-Tai Zhao and John D. CorbettCite this: Inorg. Chem. 1994, 33, 25, 5721–5726Publication Date (Print):December 1, 1994Publicat…
Tensile creep and creep rupture behaviors of alumina/17 vol% silicon carbide nanocomposite and monolithic alumina Were investigated at 1200° to 1300°C and at 50 to 150 MPa. Compared to the monolithic alumina, the nanocomposite exhibited excellent creep resistance. The minimum creep rate of the nanocomposite was about…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotoenzymes: A Novel Class of Biological CatalystsTadhg P. BegleyCite this: Acc. Chem. Res. 1994, 27, 12, 394–401Publication Date (Print):December 1, 1994Publication History Published online1 May 2002Published inissue 1 December 1994https://pubs.acs.org/doi/10.1021/ar00048a…
A stable high-copy-number plasmid pSYL105 containing the Alcaligenes eutrophus polyhydroxyalkanoic acid (PHA) biosynthesis genes was constructed. This plasmid was transferred to seven Escherichia coli strains (K12, B, W, XL1-Blue, JM109, DH5alpha, and HB101), which were subsequently compared for their ability to synth…
Raman spectroscopy was used to examine the structure of barium titanium oxide thin films grown by metal-organic chemical vapor deposition (MOCVD) and laser-assisted deposition. The spectra were compared with the spectra of a ceramic specimen and a single crystal. Raman peaks specific to the tetragonal ferroelectric ph…
The concentrations of L-aspartate, L-glutamate, L-serine, glycine and gamma-aminobutyric acid (GABA) were determined in repeated samples of ventricular CSF from five patients with severe closed head injury. The values were compared with those obtained from five subjects undergoing surgical treatment for intractable de…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSegregative Crystallization of Several Diamond-like Phases from the Graphitic BC2N without an Additive at 7.7 GPaSatoshi Nakano, Minoru Akaishi, Takayoshi Sasaki, and Shinobu YamaokaCite this: Chem. Mater. 1994, 6, 12, 2246–2251Publication Date (Print):December 1, 1994Public…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNanophase Separation in Monodisperse Rodcoil Diblock PolymersL. H. Radzilowski and S. I. StuppCite this: Macromolecules 1994, 27, 26, 7747–7753Publication Date (Print):December 1, 1994Publication History Published online1 May 2002Published inissue 1 December 1994https://pubs…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAb Initio Molecular Orbital Study of Na(H2O)n (n = 1-6) Clusters and Their Ions. Comparison of Electronic Structure of the "Surface" and "Interior" ComplexesKenro Hashimoto and Keiji MorokumaCite this: J. Am. Chem. Soc. 1994, 116, 25, 11436–11443Publication Date (Print):Dece…
Simulations of water using the exnteded simple point charge (SPC/E) model at temperatures between 190 and 330 K were performed using molecular dynamics techniques. A maximum in the density at 1 bar pressure was found to occur at 235 K. The energies and diffusivities are also reported. The SPC/E-modeled water exhibits…
Crystal polymorphism is important because of the different physical and mechanical properties of the polymorphs. Based on a stereochemical approach to controlling crystal polymorphism using stereospecific nucleation inhibitors, auxiliaries have been designed for the precipitation of the yform of glycine (see Figure) f…
Both liquid and solid foams, together with analogous cellular materials, have distinctive mechanical or rheological properties which find many applications. This review concentrates on the search for a basic understanding of the underlying mechanisms, in terms of specific structural models. Computer simulations play a…
The crystal structures of three calcium chalcogenides CaS, CaSe, and CaTe were investigated by energy-dispersive x-ray-diffraction techniques using a synchrotron source to a static compression up to 52 GPa. For CaS and CaSe, a first-order phase transformation from the NaCl phase to the CsCl phase was observed at 40 an…
Highly transparent and conductive zinc-stannate thin films, ZnSnO 3 , have been prepared by rf magnetron sputtering using a target composed of ZnO–SnO 2 ( SnO 2 , 78 wt%). A resistivity as low as 4×10 -3 Ω·cm and an average transmittance above 80% in the visible range were obtained for undoped zinc-stannate films depo…
The molecular weight of polyaniline can be substantially increased from that normally obtained (Mw ≈ 53 000) by the oxidative polymerization of aniline with ammonium peroxydisulfate at about 0 to 3 °C up to about 218 000 by the presence of selected dissolved neutral salts. A further increase up to Mw ≈ 385 000 can be…