Materials Literature
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The observation that Young's law for the contact angle of a liquid droplet on a substrate should continue to hold when the droplet is deformed by gravity is to some extent counter-intuitive, which has led to doubts and controversy in the literature. We show, in agreement with others, that Young's law holds in the pres…
Abstract 1,4:3,6‐Dianhydrosorbitol (DAS) seems to be an interesting reagent for the synthesis of polyurethanes. In the present work, the kinetics of the reaction of DAS with a monoisocyanate ( p ‐tolyl isocyanate, p ‐TI) and with a diisocyanate (4,4′‐diphenylmethane diisocyanate, MDI) were studied with the help of a c…
Abstract Die beschriebenen Trisalkoxy‐polyoxovanadate mit verzerrter Lindqvist‐Struktur, in der sechs der zwölf μ 2 ‐verbrückenden Sauerstoffatome formal durch die Sauerstoffatome von zwei koordinierten Pentaerythritolliganden ((HOCH 2 ) 3 CCH 2 OH) ersetzt wurden, können auf einfache Weise im wäßrigen Medium dargeste…
Numerical and asymptotic results are presented for a coupled PDE system that models recent experiments of the self-focussing of laser light in a nematic liquid crystal. This study complements previous asymptotic analyses which, in a narrow-beam limit, describe two essential features observed in nematic self-focussing…
Abstract Fe(ClO 4 ) 2 reacts with the segmental ligand 2‐{6‐[1‐(3,5‐dimethoxybenzyl)‐1 H ‐benzimidazol‐2‐yl]pyridin‐2‐yl}‐1,1′‐dimethyl‐5,5′‐methylene‐2′‐(5‐methylpyridin‐2‐yl)bis[1 H ‐benzimidazole] ( L 2 ) in MeCN to give the diamagnetic deep violet complex [Fe( L 2 ) 2 ] 2+ where the metal is pseudo‐octahedrally co…
Power conversion efficiency (PCE) measurements were carried on a thermogalvanic cell containing the ferricyanide/ ferrocyanide couple in an aqueous background electrolyte of and using two planar platinum electrodes. The PCE was found to be 0.031% which is ca. 0.50% of the Carnot maximum for the two electrode temperatu…
This paper describes refinements to an instrument for determining the viscoelastic properties of a solid material isothermally, with a single apparatus, over 10 decades of time and frequency. Torque is applied electromagnetically to a specimen fixed at one end. Specimen deformation is determined via a laser beam refle…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNOx Abatement with Carbon Adsorbents and Microwave EnergyYougen Kong and Chang Yul ChaCite this: Energy Fuels 1995, 9, 6, 971–975Publication Date (Print):November 1, 1995Publication History Published online1 May 2002Published inissue 1 November 1995https://pubs.acs.org/doi/1…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation of .alpha.,.omega.-Diisopropenyloligopropylene by Thermal Degradation of Isotactic PolypropyleneTakashi Sawaguchi, Tadashi Ikemura, and Manabu SenoCite this: Macromolecules 1995, 28, 24, 7973–7978Publication Date (Print):November 1, 1995Publication History Publis…
An experimental procedure is presented which allows the analysis of the angular dependence of the coercivity of polycrystalline samples ${\mathit{H}}_{\mathit{c}}$(\ensuremath{\theta}) in terms of the angular dependence of the switching field of the individual grains forming the material, ${\mathit{H}}_{\mathit{s}}$(\…
Abstract The 1-ethyl-2, 6-dimethyl-4(1 H )-pyridinone, trihydrate C 9 H 13 NO · 3H 2 O (EDMP) is a potential nonlinear optical crystalline material for second harmonic generation till the near ultraviolet region, crystallizing in the monoclinic space group Cc with Z = 4 and the unit cell parameters a = 8.382(1) Å, b =…
Abstract Electrochemical localized corrosion tests in substitute ocean water at 40°C and 70°C and ASTM G48 tests in 6% FeCl 3 solution were performed on three classes of stainless steels: Ni‐austenitic (both traditional and with high nitrogen content ones), high nitrogen Mn‐austenitic nickel free and duplex (both trad…
Formate dehydrogenase from Desulfovibrio vulgaris Hildenborough, a sulfate-reducing bacterium, has been isolated and characterized. The enzyme is composed of three subunits. A high molecular mass subunit (83,500 Da) is proposed to contain a molybdenum cofactor, a 27,000 Da subunit is found to be similar to the Fe-S su…
Abstract Mixtures of zeolite and phosphate rock react to release cations and anions into soil solution through dissolution and ion exchange. These mixtures have the potential to serve as slow‐release sources of nutrients in synthetic soils. The term zeoponics has been used to describe such systems. Research was conduc…
Abstract Four isotropic polymers, poly(butylene terephthalate) (PBT), polycarbonate (PC), polyethersulfone (PES) and polysulfone (PSU), were blended by extrusion with a thermotropic liquid crystalline polymer (LCP) at different temperatures. The morphology of extrudates was observed by means of scanning electron micro…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSyntheses, Structures, and Magnetism of Barium/Rare-Earth/Bismuth Double Perovskites. Crystal Structures of Ba2MBiO6 (M = Ce, Pr, Nd, Tb, Yb) by Powder Neutron DiffractionWilliam T. A. Harrison, Kenneth P. Reis, Allan J. Jacobson, Lynn F. Schneemeyer, and Joseph V. WaszczakC…
Ternary blends consisting of thermoplastic and thermotropic immiscible polymers were studied. Both thermodynamic and kinetic considerations were found to affect their multiphase structure. Thermodynamics is expressed by means of spreading coefficients, whereas the kinetic effect is driven by the dispersed phase viscos…
The 1:2 ordering in Ba(Ni 1/3 Nb 2/3 )O ceramics sintered at 1350‐1500°C has been investigated by using XRD and Raman spectroscopy. Both of the techniques show that the degree of the 1:2 ordering decreases as the sintering temperature increases. However, XRD discerns the 1:2 ordering only for the samples sintered at 1…
Well-defined poly(ethylene oxide) (PEO) with a cyano group at one end and a hydroxyl group at the other terminus was synthesized by the anionic ring opening polymerization of ethylene oxide (EO) initiated with (cyanomethyl)potassium (CMP) which was prepared by the metalation reaction of acetonitrile with potassium nap…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXT29Si NMR Observation of an Amorphous Magnesium Silicate Formed during Impregnation of Silica with Mg(II) in Aqueous SolutionJean-Baptiste d'Espinose de la Caillerie, Maggy Kermarec, and Olivier ClauseCite this: J. Phys. Chem. 1995, 99, 47, 17273–17281Publication Date (Print)…