Materials Literature
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Microtwin sequences in thermoelastic NixAl100-x martensite plates of different size and composition (62·5↬x↬66·0) were investigated by conventional and highresolution electron microscopy. The average twin width increases with increasing twin length and with increasing Ni content. No systematic behaviour of the volume…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTConvergent synthesis of starburst poly(ether ketone) dendronsAtsushi Morikawa, Masaaki Kakimoto, and Yoshio ImaiCite this: Macromolecules 1993, 26, 24, 6324–6329Publication Date (Print):November 1, 1993Publication History Published online1 May 2002Published inissue 1 Novembe…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBrush formation from mixtures of short and long end-functionalized chains in a good solventEugenia Kumacheva, Jacob Klein, Philip Pincus, and Lewis J. FettersCite this: Macromolecules 1993, 26, 24, 6477–6482Publication Date (Print):November 1, 1993Publication History Publish…
Ultrafine particles surrounded by graphitic carbon layers have been produced by the arc burning of a composite carbon rod containing ZrC or VC. The size of the ultrafine particles is typically in the range of 20-40 nm in diameter and the number of graphitic carbon layers surrounding a core particle ranges from about 1…
Abstract Silica grafted hafnium hydride complexes were synthesized from tetra(neopentyl)hafnium and a partially dehydroxylated silica. These surface complexes are catalysts for hydrogenolysis of neopentane and butane and for hydrogenation of isobutene and propene, under mild conditions. Their catalytic properties are…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSyntheses, structures, 113Cd solution NMR chemical shifts, and investigations of fluxional processes of bis[poly(pyrazolyl)borato]cadmium complexesDaniel L. Reger, Scott S. Mason, Arnold L. Rheingold, and Robert L. OstranderCite this: Inorg. Chem. 1993, 32, 23, 5216–5222Publ…
Abstract The epoxidation of cyclohexene, 1-decene, and styrene by molecular oxygen in the presence of aldehydes such as isobutyraldehyde and pivalaldehyde was efficiently catalyzed at 303 K by mono-cobalt-substituted Keggin-type heteropolytungstate.
Abstract We detail the melting behavior of poly(ether ether ketone) (PEEK) and investigate its melting behavior in miscible blends with poly(ether imide) (PEI). The determination of the equilibrium melting point ( T m 0 ) of PEEK is discussed by considering its inhomogeneous morphology. T m 0 is obtained by a long ext…
peer reviewed
Measurements of dynamic hysteresis loops on Fe/sub 78/B/sub 13/Si/sub 9/ amorphous ribbons, in the range 0.5 Hz>
Structural changes in sol–gel‐derived TiO 2 –SiO 2 coatings were found to proceed in an environment of high temperature and high humidity as follows: (1) dissociation of Si–O–Ti bonds in the coating by the attack of water vapor, (2) formation of Ti–O–Ti bonds, and (3) nucleation and growth of anatase TiO 2 . The coati…
The crystallographic structures of carbide and nitride formed in TiAl containing carbon and nitrogen have been investigated using transmission electron microscopy. The needle-shaped carbide and nitride are formed parallel to only the [001] direction of the L10-ordered TiAl matrix. Detailed analyses in terms of selecte…
Abstract The temperature dependence of the nucleation effect of three sorbitol derivatives on the crystallization of isotactic polypropylene (iPP) was studied by means of isothermal crystallization kinetic analysis. Isothermal crystallization thermograms obtained by differential scanning calorimetry (DSC) were analyze…
Amorphous Tb-Fe thin films prepared by the sputtering method in the compositional range Tb/sub x/Fe/sub 1-x/ (x=0-0.5) are investigated in view of their potential for use in electromagnetic thin film actuators. The magnetostriction and the coercive force for the Tb-Fe films are examined for different sputtering condit…
Two- and three-dimensional patterns and structures can be grown by electron-beam induced deposition from organic and metalorganic precursors. Using a very fine electron beam in a dedicated field emission scanning electron microscope produces nanometer size deposits which extend from surfaces to heights in the micromet…
X-ray-absorption fine-structure (XAFS) data of RbBr, RbCl, and KBr at 30 K and 125 K were measured and analyzed. An ionized-atom multiple-scattering calculation and a correlated Debye model were used for fitting the theory used in the computer code feff5 to data. The modifications of feff5 necessary to obtain good fit…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBiomimetic modeling of photosynthetic reaction center function: long-lived, spin-polarized radical ion pair formation in chlorophyll-porphyrin-quinone triadsMichael R. Wasielewski, George L. Gaines III, Gary P. Wiederrecht, Walter A. Svec, and Mark P. NiemczykCite this: J. A…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTToward organic synthesis of a magnetic particle: dendritic polyradicals with 15 and 31 centers for unpaired electronsAndrzej Rajca and Suchada UtamapanyaCite this: J. Am. Chem. Soc. 1993, 115, 23, 10688–10694Publication Date (Print):November 1, 1993Publication History Publis…
We have proposed a high-track-density optical recording method, which records signals on both the land area and groove area. From a computer simulation based on the scalar diffraction theory, we found that crosstalk between recording tracks depends on the groove depth, and is most reduced at the groove depth of 80 nm∼…
Despite their homologous structure, c-type lysozymes and alpha-lactalbumins have been found to differ profoundly in their unfolding behavior, in that the alpha-lactalbumins readily enter a partially unfolded collapsed state (the "molten globule"), whereas lysozymes unfold cooperatively to a highly unfolded state. The…