Materials Literature
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Abstract Physical and chemical structure, as well as thermal behavior of solution‐cast regenerated films, prepared from tussah ( Antheraea pernyi ) silk fibroin, were compared with those of solution‐cast native films, in order to ascertain whether treatment (degumming, dissolution) used for preparation affected their…
Niendorf HP, Alhassan A, Geens VR, Claufß W. Safety Review of gadopentetate dimeglumine: extended clinical experience after more than five million applications. Invest Radiol 1994;29:S179–S182.
Abstract The pillaring process of montmorillonite and beidellite with Al and Ga polymers has been studied using XRD, IR, 27 Al, 71 Ga, and 29 Si MAS NMR, TGA, TEM, N 2 adsorption and chemical analyses. The Al adsorption maximum for montmorillonite is close to 5.5 mEq Al/g clay, whereas the maximum for Ga is higher. Ba…
Deformation behaviour of a DO19, compound with an off-stoichiometric composition of Ti-36·5 at.% Al has been studied as a function of orientation at temperatures from −196°C to room temperature in compression. The critical resolved shear stress (CRSS) for {1100} 〈11 20〉 prism slip and (0001)〈1120〉 basal slip increases…
Hydrogen insertion in the ${\mathrm{Ce}}_{2}$${\mathrm{Fe}}_{17}$${\mathrm{H}}_{\mathit{x}}$ system leads to spectacular changes of the physical properties. A relative increase of the Curie temperature of almost 100% is observed as well as the highest volume increase. In addition to previous neutron diffraction measur…
With optical tweezers plus fluorescent labels it is now possible to force, and to observe, the stretching and the relaxation of a single polymer chain. We calculate here the unwinding of a tethered, flexible, chain ( N monomers) immersed in a solvent if, at time t = 0 starting from rest, one imposes either a flow ( V…
Several utilities have found partial discharge testing to be very useful for identifying motors or generators with deteriorated stator winding insulation. Such partial discharge tests are sensitive to problems associated with overheated insulation, loose stator bars, and pollution, all of which can cause in-service fa…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCharacterization of Lanthanide Complexes with a Series of Amide-Based Macrocycles, Potential MRI Contrast Agents, Using Eu3+ Luminescence Spectroscopy and Molecular MechanicsSteven T. Frey, C. Allen Chang, Joan F. Carvalho, Aravamutham Varadarajan, Lisa M. Schultze, Kevin L.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTGiant Colloidal Single Crystals of Polystyrene and Silica Spheres in Deionized SuspensionT. OkuboCite this: Langmuir 1994, 10, 6, 1695–1702Publication Date (Print):June 1, 1994Publication History Published online1 May 2002Published inissue 1 June 1994https://pubs.acs.org/doi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTGeminal Delocalization of .sigma.-Electrons and Ring StrainsSatoshi Inagaki, Yoshifumi Ishitani, and Takuo KakefuCite this: J. Am. Chem. Soc. 1994, 116, 13, 5954–5958Publication Date (Print):June 1, 1994Publication History Published online1 May 2002Published inissue 1 June 1…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and Characterization of Soluble Alternating Aromatic CopolyimidesJ. W. Park, M. Lee, M.-H. Lee, J. W. Liu, S. D. Kim, J. Y. Chang, and S. B. RheeCite this: Macromolecules 1994, 27, 13, 3459–3463Publication Date (Print):June 1, 1994Publication History Published onli…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLuminescent Dinuclear Complexes Containing Ruthenium(II)- and Osmium(II)-Terpyridine-type Chromophores Bridged by a Rigid Biscyclometalating LigandMarc Beley, Sandrine Chodorowski, Jean-Paul Collin, Jean-Pierre Sauvage, Lucia Flamigni, and Francesco BarigellettiCite this: In…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCompetitive Adsorption Kinetics of Polymers Differing in Length OnlyJ. C. Dijt, M. A. Cohen Stuart, and G. J. FleerCite this: Macromolecules 1994, 27, 12, 3219–3228Publication Date (Print):June 1, 1994Publication History Published online1 May 2002Published inissue 1 June 199…
Abstract This paper describes the nonisothermal crystallization of molten blends of two semicrystalline polymers, polypropylene (PP) and Nylon‐6 (N6). A discussion details the effect of the concentration of the compatibilizing agent, maleic anhydride grafted polypropylene (MAH‐ g ‐PP), on the crystallization behavior.…
Absorbable fibers of linear poly-alpha-hydroxy acids have been used successfully in providing temporary scaffolds for tissue regeneration. In some surgical applications, degradation rates for poly(glycolide) (PGA) are too high, but implants of poly(L-lactide) (PLLA) fibers may degrade too slowly for optimal function.…
Abstract This paper compares the results of 27 Al nuclear magnetic resonance spectroscopy (NMR) and Al-K-edge X-ray Absorption Near Edge Structure (XANES) of natural imogolite and allophanes and some crystalline reference minerals. All soil allophanes studied contain 4-coordinated Al (Al IV ). The highest relative pro…
The crystallographic structure of BaTiO 3 particles prepared by conventional solid‐state reaction has been investigated by X‐ray diffractometry and dielectric measurements. The systematic analysis of the diffraction pattern has clearly shown the coexistence of tetragonal and cubic phases at room temperature. The relat…
Proteins of the glucose-starvation stimulon were identified by using two-dimensional gel electrophoresis and the gene-protein database of Escherichia coli. Members of this stimulon included enzymes of the Embden-Meyerhof-Parnas (EMP) pathway, phosphotransacetylase (Pta) and acetate kinase (AckA) of the acetyl phosphat…
ADVERTISEMENT RETURN TO ISSUEPREVArticleFerromagnetic Interactions in the First Bis(.mu.-end-on-azido)manganese(II) Dinuclear Compound: [Mn(terpy)(N3)2]2.cntdot.2H2ORoberto Cortes, J. Luis Pizarro, Luis Lezama, M. Isabel Arriortua, and Teofilo RojoCite this: Inorg. Chem. 1994, 33, 12, 2697–2700Publication Date (Print)…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSelf-Assembling Porphyrin [2]-CatenanesMaxwell J. Gunter, David C. R. Hockless, Martin R. Johnston, Brian W. Skelton, and Allan H. WhiteCite this: J. Am. Chem. Soc. 1994, 116, 11, 4810–4823Publication Date (Print):June 1, 1994Publication History Published online1 May 2002Pub…