Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTrace determination of nitrogen-containing drugs by surface enhanced Raman scattering spectrometry on silver colloidsEdith L. Torres and J. D. WinefordnerCite this: Anal. Chem. 1987, 59, 13, 1626–1632Publication Date (Print):July 1, 1987Publication History Published online1…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTGlass transition and melting behavior of poly(oxy-2,6-dimethyl-1,4-phenylene)Stephen Z. D. Cheng and Bernhard WunderlichCite this: Macromolecules 1987, 20, 7, 1630–1637Publication Date (Print):July 1, 1987Publication History Published online1 May 2002Published inissue 1 July…
Hydrogels of poly(hydroxyethyl methacrylate) (polyHEMA) homopolymer do not normally support the attachment and growth of mammalian cells. By altering the surface it has been possible to dramatically change this cell-substratum interaction so that vascular endothelial cells can attach and completely populate a polyHEMA…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis, structure, and spectroscopic properties of an unusual copper(I) dimer having imidazole ligands. A model for the carbonyl derivative of hemocyanin and implications for the structure of deoxyhemocyaninThomas N. Sorrell and A. S. BorovikCite this: J. Am. Chem. Soc. 1…
The pressure equation is derived for fluids containing chain molecules interacting with site–site potentials. Three models are considered: a flexible chain with harmonic potentials for bond-length and bond-angle variations, a flexible chain in the limit as the force constants for the vibrations become infinite, and a…
An analysis of interfacial energies in a solid‐liquid system showed that complete penetration of a liquid along grain boundaries in a microstructure forming during liquid‐phase sintering is not necessarily associated with complete wetting or spreading at the solid‐liquid interface. Investigations were made on the pene…
Calmodulin has been shown to interact with high affinity with muscle phosphofructokinase (Mayr, G. W. (1984) Eur. J. Biochem. 143, 513-520, 521-529). In this study, direct binding measurements indicated that each of the two subunits of dimeric phosphofructokinase bound two calmodulins with Kd values of about 3 nM and…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMicrostructure from x-ray scattering: the disordered open connected model of microemulsionsThomas N. Zemb, S. T. Hyde, Paul Joel. Derian, Ian S. Barnes, and Barry W. NinhamCite this: J. Phys. Chem. 1987, 91, 14, 3814–3820Publication Date (Print):July 1, 1987Publication Histo…
The change in mechanical properties of a fiber‐reinforced ceramic from notch insensitivity at room temperature to notch sensitivity at elevated temperature has been investigated. The change in behavior has been attributed primarily to a correspondingly large variation in the shear resistance of the fiber/matrix interf…
The preparation of a cubic boron nitride film by physical vapor deposition processes has been investigated. The electron beam guns of a hollow cathode discharge type and a conventional high-voltage type were used for the boron evaporation source. The stoichiometric boron nitride film could be obtained by using a gas a…
Abstract The miscibility of bisphenol‐A polycarbonate (PC) with poly(methyl methacrylate) (PMMA) has been reexamined using differential scanning calorimetry (DSC) and optical indications for phase separation on heating, i.e., lower critical solution temperature (LCST) behavior. Various methods have been used to prepar…
This review describes the synthesis of 1,3-tetrachalcogenafulvalenes and 1,2-tretrathiafulvalenes, the chemical transformation of substituents, reactions of the ring system, and the synthesis of polymers with 1,3-tetrathiafulvalene units in the backbone and in the side chain. 1,2-And 1,3-tetrachalcogenafulvalenes synt…
A package of programs has been developed for efficient restrained least-squares refinement of macromolecular crystal structures. The package has been designed to be as flexible and general purpose as possible. The process of refinement is divided into basic units and an independent computer program handles each task.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReactions of iron porphyrins with trifluoromethyl, trifluoromethylperoxy, and tribromomethylperoxy radicalsD. Brault and P. NetaCite this: J. Phys. Chem. 1987, 91, 15, 4156–4160Publication Date (Print):July 1, 1987Publication History Published online1 May 2002Published iniss…
The influence of the plasticizers, di-(2-ethylhexyl)phthalate (DEHP) and tri-(2-ethylhexyl)trimellitate (TOTM), on granulocyte function was examined. Polyvinyl chloride (PVC) bags with DEHP (DEHP-PVC) leaked DEHP into plasma, but TOTM did not dissolve in plasma under the same conditions. Glow discharge treatment inhib…
High‐purity and high‐density tin dioxide doped with 1 × 10 20 /cm 3 antimony was prepared by hot isostatic pressing, and its electrical conductivity was measured over the temperature range 20° to 1200°C in various atmospheres. The conductivity decreased with increasing temperature and reached the value found in specim…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBonding character in tetracoordinate (phthalocyaninato)iron(II) complexes with electron-withdrawing substituents as studied by Moessbauer spectroscopyToshie Ohya, Nagao Kobayashi, and Mitsuo SatoCite this: Inorg. Chem. 1987, 26, 15, 2506–2509Publication Date (Print):July 1,…
A study of ion-plating parameters (primarily deposition rate and substrate bias voltage), coating structure, and the corrosion protection provided by aluminum coatings on uranium is presented. Ion plating at low temperatures yields a variety of aluminum coating structures on uranium. For example, aluminum coatings pro…
The electrical resistivity and superconducting transition temperatures are studied as a function of hydrogen content on two series of Nb-Ta superlattices grown by molecular-beam epitaxy with modulation wavelengths of 20 and 85 A\r{}. Hydrogen enhances the resistivity of the structures which, in extreme cases, leads to…
Abstract The use of high ionic‐strength media for determination of soil pH has been limited primarily to acid soils. In this study, the theoretical and practical significance of the pH of calcareous soils suspended in 1 M KCl was investigated. Solutions from suspensions of 24 soils in 1 M KCl were analyzed for pH, Ca,…