Materials Literature
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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…
We report on the temperature evolution of the 2${k}_{F}$ charge-density wave (CDW) in the blue bronze ${\mathrm{K}}_{0.3}$${\mathrm{MoO}}_{3}$. Using detailed profile analysis of the x-ray scattering, we were able to deduce: (i) from the temperature dependence of the peak intensity the square of the order parameter in…
Specific DNA staining for electron microscopic observation is simplified by a shorter synthesis of the staining reagent. The new, more reliable reagent, osmium ammine-B, is stable for more than a year, dissolves completely in water, and does not require reoptimization of staining conditions for every batch, yet reprod…
An explicit formula for the chemical potential (μ) of simple fluids is derived for a whole class of integral equation theories, including the Percus–Yevick approximation and some other, more recently proposed closures. This formula only requires the pair correlation functions for one single state of the system, and ap…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSemiconductor to metal transition of WS2 induced by K intercalation in ultrahigh vacuumF. S. Ohuchi, W. Jaegermann, C. Pettenkofer, and Bruce A. ParkinsonCite this: Langmuir 1989, 5, 2, 439–442Publication Date (Print):March 1, 1989Publication History Published online1 May 20…