Materials Literature
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The binary isopleth Na 2 O.B 2 O 3 ‐SiO 2 of the Na 2 O‐B 2 O 3 SiO 2 ternary system has been investigated. A phase diagram is presented based upon data from differential thermal analysis studies of prepared glasses and direct observation of the melting behavior using solid‐state video imaging. Phase equilibria relati…
Abstract The melting behavior of drawn, compression‐molded isotactic polypropylene has been ex‐amined in terms of the infuence of drawing conditions on the observed properties. Two endothermic peaks were observed on differential scanning calorimetry (DSC) for samples when high draw ratios and high heating rates were u…
Abstract The two series of compounds, Li x NbO 2 and Na x NbO 2 , were synthesized from LiNbO 2 and NaNbO 2 with oxidizing agents. From neutron diffraction, it is concluded that the Li position is fully occupied for x = 1. Even though the long‐range crystal symmetry does not seem to change for x < 1, as monitored b…
Synopsis Morphology and coefficient of friction associated with water content in the skin were investigated by a combination method of profilometry and measurement of friction using a newly developed instrument placed on the flexor aspect of the forearm. It was shown that the number of domains enclosed by lines (sulci…
We model dilute lyotropic smectics as a periodic stack of compressible-fluid membranes with width w separated by an incompressible background fluid of thickness d - w . We calculate the dynamical modes for this model as a function of the wave number q . For qd ≪ 1, we find precisely the hydrodynamic modes of a two-com…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEnhanced rate of redox conversion of polyaniline films induced by the incorporation of platinum microparticlesR. Kostecki, M. Ulmann, J. Augustynski, D. J. Strike, and M. Koudelka-HepCite this: J. Phys. Chem. 1993, 97, 31, 8113–8115Publication Date (Print):August 1, 1993Publ…
Al-(0.7-1.4 wt%) Cu alloy films for LSI interconnects were formed, for the first time, by a metalorganic chemical vapor deposition method, using dimethylaluminumhydride ((CH 3 ) 2 AlH) and cyclopentadienylcoppertriethylphosphine ((C 5 H 5 )CuP(C 2 H 5 ) 3 ) as precursors. The depth profile of Auger electron spectrosco…
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…