Materials Literature
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Abstract Palygorskite is the dominant clay mineral in a petrocalcic horizon of the Rotura soil series (a coarse‐loamy, mixed, thermic, Typic Haplargid), a soil of middle Pleistocene age in southern New Mexico. The purpose of this study was to determine if palygorskite is eolian in origin, inherited from its alluvial p…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDiffusion of a symmetric block copolymer in a periodic potentialJean Louis Barrat and Glenn H. FredricksonCite this: Macromolecules 1991, 24, 24, 6378–6383Publication Date (Print):November 1, 1991Publication History Published online1 May 2002Published inissue 1 November 1991…
The reduction of the diffusion coefficient of latex spheres near glass surfaces was measured by photon correlation spectroscopy. Theory and experiment are not in agreement; possible causes for the discrepancy are discussed. In addition, the diffusion coefficient of sedimented latex spheres on a glass surface decreases…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSurface modification of BPDA-PDA polyimideKang Wook Lee, Steven P. Kowalczyk, and Jane M. ShawCite this: Langmuir 1991, 7, 11, 2450–2453Publication Date (Print):November 1, 1991Publication History Published online1 May 2002Published inissue 1 November 1991https://doi.org/10.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDetermination of the electronic structure of oligofurans and extrapolation to polyfuranGiuseppe Distefano, Derek Jones, Maurizio Guerra, Laura Favaretto, Alberto Modelli, and Giuliano MengoliCite this: J. Phys. Chem. 1991, 95, 24, 9746–9753Publication Date (Print):November 1…
ABSTRACT Powdered cellulose is a natural beta‐l,4‐glucan polymer. It is 99% total dietary fiber (dwb) and has many uses as a low‐calorie food ingredient. Depending on its fiber length, cellulose can retain 3.5 to 10 times its weight in water. Temperature and pH exerted small effects on water rentention capacity. A pow…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCalculation of the free energy for gas absorption in amorphous polypropyleneFlorian Mueller-PlatheCite this: Macromolecules 1991, 24, 24, 6475–6479Publication Date (Print):November 1, 1991Publication History Published online1 May 2002Published inissue 1 November 1991https://…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTContact electrification: ion transfer to metals and polymersA. F. Diaz, D. Wollmann, and D. DreblowCite this: Chem. Mater. 1991, 3, 6, 997–999Publication Date (Print):November 1, 1991Publication History Published online1 May 2002Published inissue 1 November 1991https://pubs.…
Co/sup 2+/ and Ti/sup 4+/ substituted M-type barium ferrite, BaFe/sub 12-2x/Co/sub x/Ti/sub x/O/sub 19/, with x from 0 to 0.9 has been prepared using a modified ceramic method and investigated by electron microscopy, vibrating sample magnetometry and Mossbauer spectroscopy. Results show that Co/sup 2+/ and Ti/sup 4+/…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLuminescence of the europium(3+) ion in zirconium(4+) compoundsD. Van der Voort and G. BlasseCite this: Chem. Mater. 1991, 3, 6, 1041–1045Publication Date (Print):November 1, 1991Publication History Published online1 May 2002Published inissue 1 November 1991https://pubs.acs.…
Abstract Better information is needed to predict how soil acidity affects exchangeability of heavy metals in soils dominated by Fe and Mn oxides with pH‐dependent charge. Our laboratory study sought to separate exchangeable and nonexchangeable Zn sorbed by four B horizon soil materials with varied mineralogy and sesqu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSulfonation of (aryloxy)- and (arylamino)phosphazenes: small-molecule compounds, polymers, and surfacesHarry R. Allcock, Richard J. Fitzpatrick, and Lawrence SalvatiCite this: Chem. Mater. 1991, 3, 6, 1120–1132Publication Date (Print):November 1, 1991Publication History Publ…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReduction and oxidation of cellulose surfaces by means of cold plasmaC. M. Gilbert Carlsson and Goeran StroemCite this: Langmuir 1991, 7, 11, 2492–2497Publication Date (Print):November 1, 1991Publication History Published online1 May 2002Published inissue 1 November 1991http…
Abstract The field of thermoplastic elastomers has shown an explosive growth with the successful commercialization of elastomeric alloys (EAs) in 1981, based on the original work of Coran, Das, and Patel on dynamic vulcanization and the discovery of preferred cure system by Abdou-Sabet and Fath. These discoveries have…
The electron density function of rho (r) in a crystal determines its diffraction pattern, that is, both the magnitudes and phases of its X-ray diffraction maxima, and conversely. If, however, as is always the case, only magnitudes are available from the diffraction experiment, then the density function rho (r) cannot…
The NAC (nitrogen assimilation control) protein from Klebsiella aerogenes is a LysR-like regulator for transcription of several operons involved in nitrogen metabolism, and couples the transcription of these sigma 70-dependent operons to regulation by the sigma 54-dependent NTR system. NAC activates expression of oper…
Attachment of bacteria to surfaces is a common phenomenon in nature. Bacterial attachment represents an affiliation between the bacterium and the surface. There are three distinct stages in the accumulation of bacteria at a collecting surface viz. (1) adsorption, (2) consolidation and (3) colonisation. In the adsorpti…
An affine transformation model is applied to the diffusion coefficients of perfectly aligned and partially aligned ellipsoidal particles. It is tested against molecular dynamics simulations of hard ellipsoids, free to translate and rotate, in the nematic liquid crystal phase. The theory explains the variation with ord…
Transition metals such as Mo, W, Ta, Cr, and W can be used to significantly enhance the localized corrosion resistance of Al. Since these elements exhibit very low solubilities in aluminum, a nonequilibrium alloying method, such as sputter deposition, must be used to produce single‐phase alloys. The addition of approx…
Based on an order–disorder transition model and the calculation of coulombic electrostatic interaction of B‐site ions, an “ordering structure factor” F 0 is introduced. Consequently, an available criterion and diagram to predict the order–disorder transition of A(B′B″)O 3 is presented quantitatively. The theoretical r…