Materials Literature
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Textures of several liquid-crystalline solutions of poly(benzylglutamate) and a solution of hydroxypropylcellulose were videorecorded during and after shear and the images were Fourier transformed. We find for all the solutions that bands perpendicular to the flow direction form after cessation of prolonged shearing i…
We have developed a computational simulation of the two-dimensional soap froth, including finite Plateau borders. As the gas fraction фis decreased, there is a loss of rigidity at approximately ф=0·84, at which point the structure is that of a dense random packing of hard discs with contact number equal to four. This…
The authors have formulated a numerical approach for application to micromagnetics problems and have implemented the corresponding three-dimensional finite element code. The program has been applied to the study of hysteretic behavior and domain walls in a variety of samples. The authors discuss the numerical method a…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTime-resolved light scattering studies on the early stage of crystallization in isotactic polypropyleneTetsuo Okada, Hiromu Saito, and Takashi InoueCite this: Macromolecules 1992, 25, 7, 1908–1911Publication Date (Print):March 1, 1992Publication History Published online1 May…
SUMMARY Published reports on the effect of temperature on the sorption of ions by soil, or soil constituents, are in conflict with regard to the direction of the effect and its interpretation. It is argued that, in many cases, increased sorption with increased temperature is due to an increased rate of the reaction th…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis, structure, and properties of lanthanum strontium titanate (La1-xSrxTiO3) (0 .ltoreq. x .ltoreq. 1)Joseph E. Sunstrom, IV, Susan M. Kauzlarich, and Peter KlavinsCite this: Chem. Mater. 1992, 4, 2, 346–353Publication Date (Print):March 1, 1992Publication History Pub…
The E loci in Bombyx mori are expected to contain a homeotic gene complex specifying the identities of the larval abdominal segments. However, the molecular structure of this complex remains to be determined. We have started to analyze the structural changes in the E complex mutations. We used three newly isolated Bom…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOxamidato complexes. 2. Copper(II) and nickel(II) complexes with oxamide-N,N'-diacetic acid: solution study, synthesis, crystal structures, and magnetic propertiesFrancesc Lloret, Jorunn Sletten, Rafael Ruiz, Miguel Julve, Juan Faus, and Michel VerdaguerCite this: Inorg. Che…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA novel copper complex and CVD precursor: (.eta.2-butyne)copper(I) hexafluoroacetylacetonateThomas H. Baum and Carl E. LarsonCite this: Chem. Mater. 1992, 4, 2, 365–369Publication Date (Print):March 1, 1992Publication History Published online1 May 2002Published inissue 1 Mar…
Two recently published methods of blood-brain barrier permeability measurement using Gd-DTPA scanning are compared by authors representing each group. The physiological models are reconciled. Results from both groups agree. These show that the transfer constant (the permeability surface area product per unit volume of…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCocrystallization and phase segregation of polyethylene blends. 2. Synchrotron-sourced x-ray scattering and small-angle light scattering study of the blends between the D and H speciesKohji Tashiro, Michael M. Satkowski, Richard S. Stein, Yingjie Li, Benjamin Chu, and Shaw L…
The structural instability driven by soft phason modes in icosahedral quasicrystals is investigated. It is found that, depending on the physical parameters, three distinct soft modes induce the structural instabilities associated with the symmetry changes, ${\mathit{I}}_{\mathit{h}}$\ensuremath{\rightarrow}${\mathit{D…
M.1 monoclonal antibody has previously been shown to passively transfer partial resistance to schistosome infection within mice and to recognize a 28-kDa antigen that has peptide sequence homology with triose-phosphate isomerase (TPI; D-glyceraldehyde-3-phosphate ketol-isomerase, EC 5.3.1.1). We have now isolated the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTObservation of "mesh" and "strut" structures in block copolymer/homopolymer mixturesTakeji Hashimoto, Satoshi Koizumi, Hirokazu Hasegawa, Tatsuo Izumitani, and Stephen T. HydeCite this: Macromolecules 1992, 25, 5, 1433–1439Publication Date (Print):March 1, 1992Publication Hi…
We have studied the surface chemistry of two lots of Biomer (BSP067 and BSUA001), a widely used commercial poly(ether urethane) (PEU). Although transmission infrared adsorption studies revealed no differences in the bulk chemistry of the two lots, the surface chemistry, as seen by x-ray photoelectron spectroscopy (XPS…
Self-consistent spin-polarized energy-band calculations have been performed for ${\mathrm{Mn}}_{2}$Sb for a ferrimagnetic (FI), ferromagnetic (F), and antiferromagnetic (AF) spin alignment. The calculated local moments on the two types of Mn atoms are in agreement with values obtained from neutron diffraction for FI $…
Abstract An experimental study of a semibatch reaction crystallization is presented. Dilute hydrochloric acid is fed to a stirred solution of sodium benzoate to crystallize benzoic acid. The weight mean size of the product crystals increases with increasing stirring rate, reaches a maximum, and then decreases again. L…
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The proximity of two or more porphyrins has been shown to be crucial in numerous biological processes such as electron transfer or oxygen activation. We report the electrochemical and spectroscopic (UV-vis, EPR) behavior of two families of dimeric cofacial diporphyrins, either covalently linked by two amide bridges (F…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTWeakly bound complexes of carbon monoxideCarol A. Parish, Joseph D. Augspurger, and Clifford E. DykstraCite this: J. Phys. Chem. 1992, 96, 5, 2069–2079Publication Date (Print):March 1, 1992Publication History Published online1 May 2002Published inissue 1 March 1992https://pu…