Materials Literature
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Citrate transport in Salmonella typhimurium involves inducible periplasmic components. Two forms of a tricarboxylate-binding protein, C1 and C2, were isolated, in high yield, from the periplasm of a cyclic AMP phosphodiesterase mutant. These immunologically cross-reactive Mr = 29,000 proteins were crystallized using a…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDegradation of chain molecules. 2. Thermodynamically induced shear degradation of dissolved polystyreneM. Ballauff and B. A. WolfCite this: Macromolecules 1984, 17, 2, 209–216Publication Date (Print):February 1, 1984Publication History Published online1 May 2002Published ini…
Abstract Water‐ground Phlogopite micas were classified into narrow particle‐size distributions containing flakes with well‐defined diameters and thicknesses in order to evaluate the influence of particle size and flake aspect ratio on the mechanical properties of mica‐filled polypropylenes, For the purposes of compari…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRegioselective functionalization of heterocyclic rings: synthesis and reactions of 1-methyl-2-(trimethylsiloxy)pyrrole and 2-(trimethylsiloxy)thiopheneMariella Fiorenza, Gianna Reginato, Alfredo Ricci, Maurizio Taddei, and Pasquale DembechCite this: J. Org. Chem. 1984, 49, 3…
Recently, interlayer exchange-coupling constants in solids of compounds $[\mathrm{N}{\mathrm{H}}_{3}{(\mathrm{C}{\mathrm{H}}_{2})}_{n}\mathrm{N}{\mathrm{H}}_{3}]\mathrm{Cu}{\mathrm{Br}}_{4}$, with $n=3 \mathrm{and} 4$, have been measured by Drumheller et al. Following our earlier theoretical analysis of such compounds…
The temperature dependence of the soliton density ${n}_{s}$ derived from the dielectric data in ${\mathrm{Rb}}_{2}$Zn${\mathrm{Cl}}_{4}$ is compared with the one obtained from nuclear-magnetic-resonance measurements and x-ray scattering data. The finite value of ${n}_{s}$ at the "lock-in" transition ${T}_{c}$ and the…
The effect of molybdate, chromate and tungstate on the pitting resistance of iron has been investigated, and the repair mechanism is considered. Molybdate enhanced the pitting resistance with increasing the concentration, which was attributed to the polymolybdate’s ability to adsorb or precipitate as a salt. Chromate…
Abstract Brownian dynamics simulations of short wormlike chains are carried out using the method of Ermak and McCammon [(1978) J. Chem. Phys. 69 , 1352–1360]. Following Hagerman and Zimm [(1981) Biopolymers 20 , 1481–1502], the wormlike chain is modeled as a string of beads. In each simulation, the dynamic evolution o…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMixed-ligand (1,2-diimine)(ethylene-1,2-dithiolate) complexes of nickel, palladium, and platinumArnd Vogler, Horst Kunkely, Joachim Hlavatsch, and Andreas MerzCite this: Inorg. Chem. 1984, 23, 4, 506–509Publication Date (Print):February 1, 1984Publication History Published o…
Abstract A new predictive relation between pressure and temperature changes on the glass‐transition boundary is derived for random solutions. The isobaric version of this relation is integrated to recover a previous theory for the compositional variation of glass‐transition temperatures. The isothermal form of the dif…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTtrans-Stilbene-amine exciplexes. Behavior of the exciplex, solvent-separated radical ion pair, and free radical ionsWalter Hub, Siegfried Schneider, Friedrich Doerr, Joe D. Oxman, and Frederick D. LewisCite this: J. Am. Chem. Soc. 1984, 106, 3, 708–715Publication Date (Print…
An experimental study has been made on the magnetic anisotropy of amorphous TbCo films prepared by rf co-sputtering. TbCo films prepared at a substrate bias voltage of –100 V exhibit a large uniaxial anisotropy of 2×10 6 erg/cm 3 with its easy axis perpendicular to the film plane, whereas films prepared without the su…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAdsorption and catalytic behavior of palladium dispersed on rare earth oxidesMichael D. Mitchell and M. Albert VanniceCite this: Ind. Eng. Chem. Fundamen. 1984, 23, 1, 88–96Publication Date (Print):February 1, 1984Publication History Published online1 May 2002Published iniss…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotosensitive monolayers. Studies of surface-active spiropyrans at the air-water interfaceDavid A. Holden, Helmut Ringsdorf, Veerle Deblauwe, and Georges SmetsCite this: J. Phys. Chem. 1984, 88, 4, 716–720Publication Date (Print):February 1, 1984Publication History Publishe…
The temperature dependences of the conductivity CsHSO4, CsHSeO4, RbHSO4, RbHSEO4, and NH4HSO4 have been measured and optical investigation was also made. It was found that the high temperature phase transitions in CsHSO4, CsHSeO4, and RbHSeO4 at 413, 400 and 446 K, respectively are the transitions to the superionic st…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhase equilibria and transition in mixtures of a homopolymer and a block copolymer. 1. Small-angle x-ray scattering studyWang Cheol Zin and Ryong Joon RoeCite this: Macromolecules 1984, 17, 2, 183–188Publication Date (Print):February 1, 1984Publication History Published onli…
Abstract ZnS sols containing alcohol or formate as reactants for positive holes and nitrous oxide or carbon dioxide as reactants for electrons were illuminated and the yields of the various products determined. Alcohols are oxidized via a one‐hole mechanism, the product being an 1‐hydroxyalkyl radical which undergoes…
Abstract A computer program based on the use of Gaussian expressions for the x‐ray distribution with depth [ϕ(ρz)curves] was tested on its usefulness for quantitative electron probe microanalysis. As the good results originally claimed for a similar program could not be reproduced initially, it was subjected to a deta…
A densifcation algorithm for irradiated UO 2 fuel, modified to reflect a rapid densification rate from 0 to 10 MW.h/kg U, is presented. Included in a fuel performance code, the algorithm gives improved agreement between measured and calculated sheath strains.
Diamagnetic and paramagnetic amine derivatives of cellulose have been prepared from selectively oxidized cellulose precursors via the reductive amination method using sodium cyanoborohydride. 4-Amino-2,2,6,6-tetramethylpiperidine-1-oxyl was employed in the syntheses of nitroxide spin labelled cellulose derivatives 4 a…