Materials Literature
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Abstract Three pedons of Spodosols or Spodosol‐like soils from Quebec and Ontario containing a considerable amount of acid‐oxalate extractable Al, Fe, and Si were examined in detail by additional selective chemical dissolution, x‐ray diffraction, infrared absorption, and Mössbauer methods to characterize noncrystallin…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectronic structures of the Ru2(RNNNR)4, Rh2(RNCHNR)4, and Co2(RNNNR)4 molecules: ordering and separation of M-M .delta.* and .pi.* orbitalsF. Albert Cotton and Xuejun FengCite this: Inorg. Chem. 1989, 28, 6, 1180–1183Publication Date (Print):March 1, 1989Publication Histor…
This reference book, aimed at engineers, managers and regulators, provides information on design criteria, operating requirements and implementation procedures for all hazardous waste incineration equipment and facilities. It also defines current regulations and describes ancillary systems and equipment, such as waste…
The dependence of enhancement of the infrared bands by thin Ag films on the molecular structure of the organic compound was investigated. A different enhancement behavior for the three isomers—ortho-, meta-, and paranitrobenzoic acids—was observed and accounted for by structural features. The presence of the ionized s…
Some new, ring-substituted phthalocyanines have been synthesized and underwent preliminary testing for photodynamic activity using the colony forming ability of Chinese hamster cells in culture as an endpoint. Using 4-(3-N,N-diethylaminopropyl)phthalonitrile as a precursor, the previously unknown metal-free 2,9,16,23-…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTComparative study of the surface hydroxyl groups of fumed and precipitated silicas. I. Grafting and chemical characterizationM. Zaborski, A. Vidal, G. Ligner, H. Balard, E. Papirer, and A. BurneauCite this: Langmuir 1989, 5, 2, 447–451Publication Date (Print):March 1, 1989Pu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEvaluation of interactions in blends of ethylene-vinyl acetate copolymers with poly(vinyl chloride) using model compoundsC. A. Cruz-Ramos and D. R. PaulCite this: Macromolecules 1989, 22, 3, 1289–1300Publication Date (Print):March 1, 1989Publication History Published online1…
Effects of a depth-dependent specimen potential on x-ray photoelectron spectroscopic data were analyzed using both numerical simulation and experimental spectral data. The analysis shows that when the potential gradient near the specimen surface is larger than 0.1 V/nm, it will cause significant broadening of the phot…
The factors which determine or exert an influence on the zero point of charge (ZPC) of soils were examined, using 26 variable charge soils from Thailand and Japan. ZPC was mainly correlated with amorphous A1 for the Japanese volcanic ash soils, and with crystalline Fe oxides for the Thai Oxisols and Ultisols. Besides,…
A flow instability has been observed in a rectangular thin conducting wall duct in MHD experiments at ANL’s ALEX facility. It developed in a side layer jet attached to a side wall parallel to the applied B-field. The nature of the instability resembles very strongly that of a classic laminar instability in ordinary fl…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectronic structure of cobalt phthalocyanine: a charge density studyB. N. Figgis, E. S. Kucharski, and P. A. ReynoldsCite this: J. Am. Chem. Soc. 1989, 111, 5, 1683–1692Publication Date (Print):March 1, 1989Publication History Published online1 May 2002Published inissue 1 M…
Abstract In view of the current demand for novel, non‐toxic, flame‐ and smoke‐ suppressant systems for synthetic polymers, certain inorganic tin compounds have been evaluated as fire retardants in a series of commercial brominated polyester resin formulations. The results obtained clearly show that zinc hydroxystannat…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTExciton coupling in bis(phthalocyaninato)tin(IV)Osamu Ohno, Naoto Ishikawa, Hideyo Matsuzawa, Youkoh Kaizu, and Hiroshi KobayashiCite this: J. Phys. Chem. 1989, 93, 5, 1713–1718Publication Date (Print):March 1, 1989Publication History Published online1 May 2002Published inis…
Abstract Using dielectric techniques to monitor thermoset properties on‐line during processing requires a mathematical relationship between the experimentally obtained signals and the physical state of the polymer. Such a relationship accounting for the dielectric response during both isothermal and dynamic cure exper…
The preparation of high‐purity mullite powders (3Al 2 O 3 · 2SiO 2 ) was examined using aluminum salts or boehmite and fumed silica. The combination of aluminum sulfate and fumed silica was found to have the highest quality for mullite powder. A slurry consisting of an aqueous solution of aluminum sulfate and fumed si…
Abstract The absorption of organic molecules into the bulk of H3PW12O40 and its salts was studied. Polar (or basic) molecules, such as alcohols and amines, were readily absorbed into H3PW12O40, but nonpolar hydrocarbons were not absorbed. The absorption depended not only on the polarity but also on the molecular size.…
Fructose-1,6-bisphosphatase (D-fructose-1,6-bisphosphate 1-phosphohydrolase, EC 3.1.3.11) from the cortex of pig kidney and its complexes with either fructose 2,6-bisphosphate (Fru-2,6-P2) or adenosine monophosphate (AMP) have been crystallized in the space group P3(2)21. The three-dimensional structure of the native…
The smectic A layer structure of a homogeneously aligned 8CB liquid crystal (25 µm in thickness) has been studied by X-ray diffraction analysis. Contrary to the common recognition, it is found, for the first time, that the local layer structure of this type of cell changes to a chevron layer structure from a book-shel…
A model for chemical vapor infiltration is applied to the study of the growth of alumina from the chemical reaction among AlCl 3 , H 2 , and CO 2 within a SiC‐fiber bundle which is situated in an isothermal hot‐wall reactor. The pore space between the fibers is simulated by cylindrical capillary tubes. The model consi…
We study cellular structures moving at constant velocity, in a symmetric model of directional solidification. This is done by employing Newton's method to solve a discretized version of the integro-differential equation for the solid-liquid boundary. Our results indicate that there is a continuous band of allowed wave…