Materials Literature
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The diffraction of electromagnetic radiation from one-dimensional planar transmittive screens illuminated by Gaussian-profile beams is examined. The incident Gaussian beam is expressed as a superposition of elementary plane waves that propagate along different directions, with the aid of the plane-wave spectrum techni…
Flavocytochrome b2 from Saccharomyces cerevisiae catalyzes the oxidation of L-lactate to pyruvate and the electron transfer to cytochrome c in the mitochondrial intermembrane space. It is a homotetramer with a molecular weight of 4 x 58 kDa, each monomer of which is composed of 2 distinct domains, the one carrying FMN…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystal Structure, Morphology, and Phase Transitions in Aromatic Polyimide Oligomers. 1. Poly(4,4'-oxydiphenylene pyromellitimide)Jiang Liu, Stephen Z. D. Cheng, Frank W. Harris, Benjamin S. Hsiao, and Kenncorwin H. GardnerCite this: Macromolecules 1994, 27, 4, 989–996Public…
Phosphonate Scale Inhibitor Adsorption/Desorption and the Potential for Formation Damage in Reconditioned Field Core M. M. Jordan; M. M. Jordan Heriot-Watt U. Search for other works by this author on: This Site Google Scholar K. S. Sorbie; K. S. Sorbie Heriot-Watt U. Search for other works by this author on: This Site…
Interactions between BaTiO 3 , and three binary glasses were studied through the reaction of BaTiO 3 , powder with glass powder. For PbO–B 2 O 3 and PbO–SiO 2 glasses, the reaction led to stable compound formation, the substitution of Pb in the BaTiO 3 structure, and noticeable grain growth of BaTiO 3 . The interactio…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRadial mixing diffusion of hydrogen in a packed-bed type of palladium membrane reactorNaotsugu Itoh, Wei Chun Xu, and Kenji HarayaCite this: Ind. Eng. Chem. Res. 1994, 33, 2, 197–202Publication Date (Print):February 1, 1994Publication History Published online1 May 2002Publis…
The thermodynamic properties and conformational structures in the crystalline and liquid crystalline phases of 4-(1-methylheptyloxycarbonyl)phenyl 4′-octyloxybiphenyl-4-carboxylate (MHPOBC) have been investigated by Raman scattering, X-ray diffraction and differential scanning calorimetry (DSC). MHPOBC can assume two…
ABSTRACT Vegetative cells and zoospores of Hormotilopsis gelatinosa Trainor & Bold, H. tetravacuolaris Arce & Bold, Planophila terrestris Groover & Hofstetter, and Phyllogloea fimbriata (Korchikov) Silva were examined by transmission electron microscopy. All cells had pyrenoids traversed by cytoplasmic cha…
Inhibition of the corrosion of aluminum (Al) in hydrochloric acid (HCl) by some triazoline derivatives was studied in relation to the concentration of the inhibitors using gasometry, the weight-loss method, and the potentiodynamic technique. All compounds investigated were found to be inhibitors of the mixed type. The…
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We report the first calorimetric characterization of isothermal glass transitions obtained by changing the pressure at constant temperature. This isothermal glass transition is described in the case of m-fluoroaniline, a so-called fragile liquid. The method employed is based on Maxwell’s equations and involves measure…
ABSTRACT Two morphotypes, fusiform and oval , were isolated from a single clone of the diatom Phaeodactylum tricornutum Bohlin and maintained as subclones by culturing in liquid and solid substrates, respectively. Salinity of the medium, from brackish to marine, had no effect on expression of the phenotypes. The oval…
In the [Fe(mtz)6] (BF4)zspin-crossover system, the Fe(I1) complexes occupy two nonequivalent lattice sites. Complexes on lattice site A show a thermal high-spin (HS) - low-spin (LS) transition at 74 K, whereas complexes on site B remain in the high-spin state down to 10 K. Complexes on both sites exhibit light-induced…
Several alkoxybenzamides are synthesized and characterized by spectroscopic and chromatographic methods. 3,4,5-Tris(alkoxy)benzamides have been found to exhibit a mesophase of a columnar or stack-like type.
Substituted N-arylpyrroles containing carbaldehyde groups on a pyrrole ring and their inhibitive effects on the corrosion of aluminum (Al) in perchloric acid (HClO4) were investigated. Electrochemical measurements showed the organic compounds examined had good inhibiting properties at 40°C. The high inhibition effect…
A special transfer of chirality through space was observed for polymers of type 1, the first liquid-crystalline polyvinyl compounds that derive their chirality and optical activity from the configuration of the main chain. The influence of chiral arrangements at the main chain (by variation of R1) on the chromophores…
Abstract Two reaction routes for the preparation of aromatic poly‐1,3,4‐oxadiazoles and poly‐1,2,4‐triazoles are studied and their influence on the physical properties, i.e., inherent viscosity, glass transition, degradation temperature, and film integrity of the final products are discussed. Aromatic poly‐1,3,4‐oxadi…
Abstract The synthesis of linear carbohydrate modified polysiloxanes has been successfully performed by hydrosilation of functionalized and protected carbohydrate derivates. The functionalization (allyl glycosilation) may be applied to a wide variety of reducing carbohydrates. In this study, mono‐, di‐ and oligosaccha…
Epitaxial films were grown on diamond(111) substrates by microwave-plasma-assisted chemical vapor deposition, and their surfaces were studied by scanning tunneling microscope (STM). STM images with atomic order resolution were obtained, and showed 1×1 periodicity, which was also observed by low-energy electron diffrac…
The fracture properties of a series of three polycrystailine aluminas are examined using indentationstrength and double cantilever beam techniques. The indentation‐strength response is shown to be sigmoidal with concave‐down behavior at small indentation loads and concave‐up behavior at large indentation loads. A mode…