Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSmall-angle x-ray scattering study of spinodal decomposition in polystyrene/poly(styrene-co-bromostyrene) blendsHermann Meier and Gert R. StroblCite this: Macromolecules 1987, 20, 3, 649–654Publication Date (Print):March 1, 1987Publication History Published online1 May 2002P…
Pyruvate formate-lyase (PFL) (formate acetyltransferase; EC 2.3.1.54) of oral streptococci is essential for metabolizing sugar into volatile compounds (formate, acetate, and ethanol). This enzyme is extremely sensitive to oxygen, and its activity is irreversibly inactivated by oxygen. When Streptococcus sanguis was an…
A historical review is given on the proton tunneling model in KH2PO4 type ferroelectrics with reference to the experimental results which have been believed to be evidences of the model. Some of the theoretical results based on the model are shown to be inconsistent with recent dynamical experimental results suggestin…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystallization-induced asymmetric transformation: stereospecific synthesis of a potent peripheral CCK antagonistPaul J. Reider, Paul Davis, David L. Hughes, and Edward J. J. GrabowskiCite this: J. Org. Chem. 1987, 52, 5, 955–957Publication Date (Print):March 1, 1987Publicat…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHighly dispersed rhodium on alumina catalysts: influence of the atmosphere on the state and dispersion of rhodiumM. I. Zaki, G. Kunzmann, B. C. Gates, and H. KnoezingerCite this: J. Phys. Chem. 1987, 91, 6, 1486–1493Publication Date (Print):March 1, 1987Publication History P…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMultipole polarizabilities and hyperpolarizabilities of AHn and A2Hn molecules from derivative Hartree-Fock theoryShiyi. Liu and Clifford E. DykstraCite this: J. Phys. Chem. 1987, 91, 7, 1749–1754Publication Date (Print):March 1, 1987Publication History Published online1 May…
Abstract Information on the interfacial region in incompatible polymer mixtures can be gathered using various techniques including electron microscopy, thermal transition analysis, and more sophisticated methods such as nonradiative energy transfer (NRET). Selected examples are reported here to illustrate the exciting…
The purpose of a perforator is to create in the casing a hole that extends into the formation to allow the efficient production or injection of fluids. This entrance hole may be made by any of three methods. Shaped-Charge Perforating The most common method of perforating is shaped-charge or "jet" perforating. The shap…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe 13C-Nmr Spectra of 1,2,10-Trioxygenated AporphinesBruce K. Cassels, André Cavé, and Michel LeboeufCite this: J. Nat. Prod. 1987, 50, 2, 297–300Publication Date (Print):March 1, 1987Publication History Published online1 July 2004Published inissue 1 March 1987https://pubs.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTS-S photohomolysis at dimolybdenum(V) RSS- and S22- bridgesMark E. NobleCite this: Inorg. Chem. 1987, 26, 6, 877–882Publication Date (Print):March 1, 1987Publication History Published online1 May 2002Published inissue 1 March 1987https://pubs.acs.org/doi/10.1021/ic00253a021h…
A bare metallic grating illuminated by a plane, S-polarized electromagnetic wave can completely absorb one of the diffracted orders. These strong absorptions have been reported to be accompanied by two different types of behavior. Here we calculate, by means of an exact differential method, the phase versus angle-of-i…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMechanism of the reduction of potassium ferricyanide by shearingP. G. Sim and Edward. WhalleyCite this: J. Phys. Chem. 1987, 91, 7, 1877–1878Publication Date (Print):March 1, 1987Publication History Published online1 May 2002Published inissue 1 March 1987https://pubs.acs.org…
The effect of variable SO4− −concentrations (10−2 to 10−1 M) in slightly alkaline solutions (pH 8.2) on aluminum corrosion has been studied at different hydrostatic pressures (1, 100, and 300 atm). The solution temperature was 20 C, and it contained ~8 ppm of dissolved oxygen. It was observed that SO4− − ions have an…
Abstract A new structural model for octacalcium hydrogenpentakis(phosphate) succinate pentahydrate, Ca8H(PO4)5(C2H4·(COO)2)·5H2O, a reaction product of octacalcium dihydrogenhexakis(phosphate) pentahydrate, Ca8H2(PO4)6·5H2O, OCP, and succinate ions, is proposed on the basis of similarities in the unit cell dimensions…
Abstract A Mössbauer spectrum of a series of potassium vanadate glasses containing 10 mol% Fe2O3 shows a paramagnetic quadrupole doublet, of which isomer shift proves to be smaller than 0.4 mm s−1 with respect to metallic iron. This indicates that the individual Fe3+ ion is present at the substitutional site of the V5…
Abstract Secondary electron emission (SEE) characteristics, i.e., SEE yield maximum, the electron energy corresponding to the maximum yield, E max , and crossover energies at which the SEE yield is unity, as a function of angle of incidence were determined for Kapton and Teflon. Photoelectron yield as a function of an…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDynamic and static quenching of the luminescence of ruthenium(II) polypyridine complexes by heteropolytungstate anions. Direct measurements of intramolecular electron-transfer rate constantsRoberto Ballardini, M. Teresa Gandolfi, and Vincenzo BalzaniCite this: Inorg. Chem. 1…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXT(Vinyloxy)chlorocyclotetraphosphazenes. The use of two-dimensional phosphorus-31 NMR spectroscopy in phosphazene chemistryDouglas E. Brown and Christopher W. AllenCite this: Inorg. Chem. 1987, 26, 6, 934–937Publication Date (Print):March 1, 1987Publication History Published…
In quantitative electron energy loss spectrometry, it is desirable to estimate the background law below core edge energy in a way that provides the maximum signal-to-noise ratio. Assuming an inverse power background model and independently Poisson distributed measurements, it is shown how to achieve this goal by using…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTheoretical study of the ground- and excited-state reactivity of sodium and hydrogen fluoride. Comparison of SCF-CI and VB treatmentsAlain Sevin, Philippe C. Hiberty, and Jean Michel LefourCite this: J. Am. Chem. Soc. 1987, 109, 6, 1845–1852Publication Date (Print):March 1,…