Materials Literature
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The traditional bulk elastic modulus approach to plant cell pressure-volume relations is inconsistent with its definition. The relationship between the bulk modulus and Young's modulus that forms the basis of their usual application to cell pressure-volume properties is demonstrated to be physically meaningless. The b…
Emission spectra of the A<SUP>2</SUP>Π-X<SUP>2</SUP>Σ<SUP>+</SUP> system of MgH have been studied at high resolution and with high signal-to-noise ratio through the use of a Fourier transform spectrometer. On the basis of a rotational analysis of these data, frequencies are predicted for the lowest pure rotational tra…
We describe the preparation of the six configurationally distinct cyclobutane-type photodimers generated by the acetone-sensitized uv irradiation of thymidine in aqueous solution. Also prepared as minor photoproducts are the 5R and 5S di-astereoisomers of 5,6-dihydrothymidine, and two novel molecules, the 5R and 5S di…
Abstract Starting with 2,3,9,10,16,17,23,24‐phthalocyanineoctacarbonitrile ( 3a ) different octa‐substituted phthalocyanines 4a – 7a and 3b – 7b with carboxylic acid, anhydride, imido and amido groups were prepared. IR and UV/VIS spectra are discussed in detail and compared with unsubstituted phthalocyanine ( 1 ). 3 –…
This review describes the current status of methods for characterizing the crosslink structure in network polymers. It is not intended to be an exhaustive summary of the literature itself, but rather a critical survey of key papers in the field. It is hoped that this information will provide researchers with an up-to-…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTC-Hydroxy- and C-methylchlorins. A convenient route to heme d and bonellin model compoundsC. K. Chang and Chariklia SotiriouCite this: J. Org. Chem. 1985, 50, 24, 4989–4991Publication Date (Print):November 1, 1985Publication History Published online1 May 2002Published inissu…
The Strehl ratio, in the form of McCutchen's theorem, is employed to design a spatial filter that increases the depth of focus. Computer-simulated images show the increment in focal depth.
A detailed investigation of the decomposition of formaldehyde was carried out to account for the fact that formaldehyde decomposition on Group VIII metals, e.g. , palladium, occurs without simultaneous hydrogen generation, while on Group I B metals, e.g. , copper, formaldehyde decomposition is accompanied by hydrogen…
A water-equivalent plastic material RW-1, in the form of thin foils as well as of thicker sheets, has been produced by melting powdered polyethylene together with CaCO3 and MgO. The mixture has been developed in a three-step procedure, starting with provisional mixtures and using data from their measured attenuation c…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAn XPS investigation of titanium dioxide thin films on polycrystalline platinumC. M. Greenlief, J. M. White, C. S. Ko, and R. J. GorteCite this: J. Phys. Chem. 1985, 89, 23, 5025–5028Publication Date (Print):November 1, 1985Publication History Published online1 May 2002Publi…
In this paper the translatory motion of a compound drop is examined in detail for low-Reynolds-number flow. The compound drop, consisting of a liquid drop or a gas bubble completely coated by another liquid, moves in a third immiscible fluid. An exact solution for the flow field is found in the limit of small capillar…
The initial rate of hydrolysis of six commercially available native (type l) celluloses was determined for the crude cellulase complexes of the thermophilic anaerobic bacterium C. thermocellum and the mesophilic fungus T. reesei. These rates were then compared with certain physical features of the substrates in an att…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMagnetic exchange interactions in binuclear transition-metal complexes of a binucleating clathrochelate ligandMark D. Timken, William A. Marritt, David N. Hendrickson, Robert A. Gagne, and Ekk SinnCite this: Inorg. Chem. 1985, 24, 24, 4202–4208Publication Date (Print):Novemb…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHighly efficient sodium hypochlorite olefin epoxidations catalyzed by imidazole or pyridine "tailed" manganese porphyrins under two-phase conditions. Influence of pH and of the anchored ligandFernando Montanari, Michele Penso, Silvio Quici, and Patrizia ViganoCite this: J. O…
A phenomenological theory of the magnetic and magnetoelectric properties of boracites is developed, using the Landau-Dzialoshinskii approach. An interpretation is proposed for the main distinctive features characterizing eleven members of this family of compounds, namely the symmetry changes, the magnetic and magnetoe…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDual-mode transport of penetrants in glassy polymersGlenn H. Fredrickson and Eugene HelfandCite this: Macromolecules 1985, 18, 11, 2201–2207Publication Date (Print):November 1, 1985Publication History Published online1 May 2002Published inissue 1 November 1985https://pubs.ac…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSpectroelectrochemistry of a .mu.-nitrido-bridged iron phthalocyanine dimerLawrence A. Bottomley, Jean Noel Gorce, Virgil L. Goedken, and Claudio ErcolaniCite this: Inorg. Chem. 1985, 24, 23, 3733–3737Publication Date (Print):November 1, 1985Publication History Published onl…
The equilibrium phase diagrams of Cu–Cr, Cu–Mo, and Cu–W show no measurable solid solubility except for a small solubility of Cr in solid Cu at higher temperatures. Even in the liquid state, the mutual solubilities in these systems are very limited. Simultaneous vapor deposition of elements on unheated substrates was…
Abstract Structurally uniform polymeric phthalocyanines 5a – e , containing imido end groups, were synthesized by reaction of different derivatives of 1,2,4,5‐benzenetetracarboxylic acid, 2a – d , with metal salts, urea and a catalyst. 5a – e were converted into polymers 3 , 4 and 6 , containing anhydride, carboxylic…
Atomic pair correlation functions for liquids provide an image of temperature-dependent short-range order. If the thermal ensemble of atomic configurations is mapped (by steepest descent on the potential hypersurface) onto potential energy minima, the pair correlation function from the resulting transformed configurat…