Materials Literature
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The milestones which have marked the development of today's liquid crystal display and liquid crystal material technologies are reviewed. The main emphasis is placed on the predominant nematic field effects and liquid crystals.
Platinum and platinum alloy films electrodeposited from conventional aqueous electrolytes find application for a wide range of uses. During deposition a variety of problems have to be overcome, necessitating optimisation of process conditions; in addition currently available platinum plating processes are not consider…
A study of effective atomic numbers for biological materials such as bone, muscle, spleen, liver, mucin, and water has been carried out in the energy region 1 to 50 MeV for photons, electrons, and He ions. It is noticed that the effective atomic number for photons and electrons increases with energy, and remains, more…
Tensile strengths of 2.0 to 5.0 mol% Y 2 O 3 ‐stabilized ZrO 2 polycrystals were described using the newly developed tensile testing method. The tensile test was conducted by attaching three strain gauges on both sides of a rectangular bar that was 10 mm by 1 mm by 200 mm. The tensile strength of tetragonal ZrO 2 poly…
Abstract An Aquic Fragiudalf developed from a fluvial terrace of Pleistocene age in northwestern Italy was investigated to determine the possible role of different compounds in fragipan bonding. Fragipan characteristics appeared only in yellow, goethite‐containing zones of the fragipan horizon but not in gray, essenti…
The corrosion inhibition of zinc in HCI solutions by several pyrazole derivatives-namely, 3(5) amino, 5(3) phenylpyrazole; 3(5) amino, 5(3) [4'-methylphenyl] pyrazole; 3(5) amino, 5(3) [4'-methoxyphenyl] pyrazole; and 3(5) amino, [4'-chlorophenyl] pyrazole-was studied by capacitance and polarization measurements. Thei…
A fast, accurate, inexpensive, and nondestructive method to determine the density of very porous ceramics has been found. This method is an extension of the water‐displacement technique with three weighings and the use of glycerol instead of water. For small (1.13 g), 29% porosity B 4 C pellets, the precision is 0.002…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIsolation, structure, and magnetic properties of a novel mononuclear rhodium(II) complexK. R. Dunbar, S. C. Haefner, and L. E. PenceCite this: J. Am. Chem. Soc. 1989, 111, 14, 5504–5506Publication Date (Print):July 1, 1989Publication History Published online1 May 2002Publish…
and refinement and anisotropic temperature factors, and Figures S1 andS2, showing ORTEP stereograms of the compound and its unit-cell contents (5 pages); Table SIII, listing observed and calculated structure factors (8 pages).
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA kinetic theory of stepwise crosslinking polymerization with substitution effectHenryk Galina and Adam SzustalewiczCite this: Macromolecules 1989, 22, 7, 3124–3129Publication Date (Print):July 1, 1989Publication History Published online1 May 2002Published inissue 1 July 198…
The dynamics of the ring spinning process has been re-analyzed as a coupled set of subproblems; the solutions are obtained numerically. The analyses in Part I and II of this series deal with the case of an uncontrolled balloon. In Part I the effects of air drag as well as gravitational and Coriolis accelerations are i…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe nitrogen atom transfer reactivity of nitridomanganese(V) porphyrins with chromium(III) porphyrinsLawrence A. Bottomley and Frank L. NeelyCite this: J. Am. Chem. Soc. 1989, 111, 15, 5955–5957Publication Date (Print):July 1, 1989Publication History Published online1 May 20…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure and surface energy characteristics of a series of pseudo-perfluoroalkyl polysiloxanesMarca M. Doeff and Elek LindnerCite this: Macromolecules 1989, 22, 7, 2951–2957Publication Date (Print):July 1, 1989Publication History Published online1 May 2002Published inissue…
The reaction of Pt(CN)2·xH2O with dppm [bis(diphenylphosphino)methane] in refluxing dimethylformamide (DMF) yielded Pt2(dppm)2(CN)4. The X-ray structure of this binuclear platinum(II) complex has been determined: Pt2(dppm)2(CN)4·2DMF, space group P21/n, Z = 2, a = 11.561 (1) Å, b = 17.475 (1) Å, c = 13.981 (5) Å, β =…
Abstract The Beaumont (fine, montmorillonitic, thermic Entic Pelludert) and Lake Charles (fine, montmorillonitic, thermic Typic Pelludert) soils along the Texas Gulf Coast produce only about 2 Mg rice ( Oryza sativa L.) ha −1 without N fertilizer, while the Nada soil (fine, montmorillonitic, thermic Typic Albaqualf) f…
Tempering of glass produces a state of compressive stress in surface regions which can enhance the resistance to crack initiation and growth. The objective of this study was to determine the influence of tempering on the sizes of surface cracks induced within the tempered surfaces of opaque porcelain-body porcelain di…
Aluminium trisulfonatophthalocyanine (A1PCS), a dye being widely advocated for use in photodynamic therapy, produces singlet oxygen with a quantum yield of 0.34 in oxygenated water at pH 7. Triplet A1PCS abstracts an electron from a variety of amines and phenols, the rate of electron transfer depending upon the thermo…
Values of the electrostrictive constants for the lead zirconate titanate (PZT) solid‐solution system were required to com plete the development of a thermodynamic phenomenological theory of PZT. The electrostrictive Q̄ 12 constant was meas ured as a function of composition on polycrystalline ceramic PZT samples. These…
Pure twist and symmetric tilt boundary structures applicable to zirconia (ZrO2) have been demonstrated using ionic potentials appropriate to both cubic and tetragonal ZrO2. Defect energies have been calculated for the boundary structures and these were used to determine the ratio of grain-boundary resistivity ρgb to b…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation of bilayer-intercalated clay films and permeation control responding to temperature, electric field, and ambient pH changesYoshio Okahata and Akiko ShimizuCite this: Langmuir 1989, 5, 4, 954–959Publication Date (Print):July 1, 1989Publication History Published on…