Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPersistence length of the "rodlike" molecule poly(p-phenylene-trans-benzobisthiazole) revisitedDaniel B. Roitman and Mark McAdonCite this: Macromolecules 1993, 26, 16, 4381–4383Publication Date (Print):August 1, 1993Publication History Published online1 May 2002Published ini…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTWater-induced crystalline transition of polyamide 66: a combined x-ray and molecular modeling approachC. Vergelati, A. Imberty, and S. PerezCite this: Macromolecules 1993, 26, 17, 4420–4425Publication Date (Print):August 1, 1993Publication History Published online1 May 2002P…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTwo New Prieurianin-Class Limonoids from Turraea mombasanaGeoffrey O. Adul, Michael D. Bentley, Barrett W. Benson, Fu-Yung Huang, Leslie Gelbaum, and Ahmed HassanaliCite this: J. Nat. Prod. 1993, 56, 8, 1414–1417Publication Date (Print):August 1, 1993Publication History Publ…
In order to realize organic ferrimagnets, we have prepared stable organic radicals, mono-, di-, trinitronyl nitroxides (1∼3) with different spin multiplicities. Among them, intramolecular ferromagnetic couplings in tri- and diradicals (3 and 2a), which are hidden by antiferromagnetic intermolecular interaction in the…
Stress corrosion cracking (SCC) of AISI 321 (UNS S32100) stainless steel (SS) in 0.5 mol/L sodium chloride (NaCl) +0.5 mol/L hydrochloric acid (HCl) solution and the inhibition effects of some iodides and iodine (I2) were studied using the slow strain rate technique. Iodides studied were tetramethyl ammonium iodide (T…
Abstract The dc electrical conductivity of TlInX 2 (X = Se, Te) single crystals, parallel and perpendicular to the (001) c ‐axis is studied under high quasi‐hydrostatic pressure up to 7.0 GPa, at room temperature. Conductivity measurements parallel to the c ‐axis are carried out at high pressures and down to liquid ni…
A new method of determining the oxygen self‐diffusion coefficients (D) in oxides has been developed. The method is based on Raman spectroscopy combined with the 16 O– 18 O exchange technique. By using the time dependent 18 O2 concentration measured in a quasi in situ manner by Raman spectroscopy, the oxygen self‐diffu…
Abstract Polarized infrared spectroscopy was applied to evaluate the orientation distribution in extrusion‐molded sheets of a liquid‐crystalline copolyester consisting of 73 mol % of 4‐hydroxy benzoic acid units and 27 mol % of 2‐hydroxy‐6‐naphthoic acid units. The surface orientation function was evaluated from the p…
The interaction of two highly purified cellulases, exo- and endo-type cellulases from Irpex lacteus, with pure cotton and amorphous cellulose was investigated by electron microscopy. The morphological observations indicated that exo- and endo-type cellulases are both strongly adsorbed on the internal microfibril of co…
Abstract Ag 3 BiO 3 und Ag 5 BiO 4 wurden durch Festkörperreaktion aus den binären Komponenten Ag 2 O und Bi 2 O 3 bei Temperaturen zwischen 770 und 800 K und Sauerstoffdrücken von 100 MPa erstmals dargestellt. Einkristalle von beiden Verbindungen konnten durch Hydrothermalreaktion zwischen Ag 2 O und Bi 2 O 3 bei 620…
Using a crossed-beam technique, we have measured differential vibrational-excitation cross sections of the electronic ground state of molecular oxygen by electron impact. The angular range covered was from 12\ifmmode^\circ\else\textdegree\fi{} to 156\ifmmode^\circ\else\textdegree\fi{}, while the incident energy range…
Nonlinear interactive effects in a bubbly cloud have been studied by investigating the frequency response of a bubble layer bounded by a wall oscillating normal to itself. Averaged equations of motion are used and the Rayleigh–Plesset equation is used to include the bubble dynamics. Energy dissipation due to viscous a…
This study presents a new approach for characterizing the frictional behavior of cotton fibers. Fiber-to-fiber or fiber-to-metal friction is determined over length incre ments of a fiber fringe, each containing a different number of contacting fibers. The total sliding distance corresponds to the maximum fiber length…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHole transport in 1,1-bis((di-4-tolylamino)phenyl)cyclohexane (TAPC) doped poly(styrene)sP. M. Borsenberger, E. H. Magin, and J. J. FitzgeraldCite this: J. Phys. Chem. 1993, 97, 31, 8250–8253Publication Date (Print):August 1, 1993Publication History Published online1 May 200…
This paper describes a low cost mobile measurement system for the determination of gold in vivo base around a 153Gd radiation source and a hyper pure germanium detector. Early clinical results are also presented to demonstrate the efficacy of the system.
Many of the in-core components in pressurized water reactors are constructed of austenitic stainless steels. The potential behavior of these components can be predicted using data on similar steels irradiated at much higher displacement rates in liquid-metal reactors or water-cooled mixed-spectrum reactors. Considerat…
Abstract The effect of surface treatment of saw dust on the physico‐mechanical properties of saw dust‐filled polypropylene composites was studied. Whereas the elastomer‐pretreated saw dust decreases the strength of composites, in‐situ addition of interface modifiers, such as maleated polypropylene, m‐phenylene bismale…
Poly(β-phenethyl l-aspartate) was found to exhibit a thermally-induced helixhelix transition between the low temperature (right-handed) and the high temperature (left-handed) forms in the lyotropic cholesteric solution. The transition takes place sharply and reversibly at around 90°C, the birefringent character of the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation and structures of the osmaborides boridohexadecacarbonylhydridopentaosmium and (dihydroborato)dodecacarbonylhydridotetraosmiumJang Hoon Chung, David Knoeppel, Deborah McCarthy, Anne Columbie, and Sheldon G. ShoreCite this: Inorg. Chem. 1993, 32, 16, 3391–3392Publ…
Small Angle Neutron Scattering experiments were carried out on liquid crystalline “side-on fixed” polyacrylates : we observe that the polymer backbone adopts a prolate conformation in the nematic phase. Such anisotropy of the global backbone is larger for smaller spacer length. In every case we measure at low temperat…