Materials Literature
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The efficacy of the microelectrode cycle life index in predicting the influence of expander on the pasted electrode performance was carried out from the simultaneous testing of four lignosulfonate expanders by the microelectrode and pasted electrode. Expander was included in the test solution for the microelectrode an…
Many postulated nuclear reactor accidents result in dryout or film boiling within the nuclear core. To minimize fuel rod damage and potential rod failure, safe or lower cladding fuel temperatures must be reestablished by encouraging coolant-cladding contact. This process is commonly referred to as quenching or rewetti…
The diffusion equation for an illuminated Schottky barrier is solved for a finite lifetime of photoinjected minority carriers within the barrier. The general solutions are related to parabolic cylinder functions when diffusivity and mobility are constant. These solutions are subject to the usual boundary conditions th…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPoly(phenylquinoxalines) containing phenylethynyl groupsP. M. HergenrotherCite this: Macromolecules 1981, 14, 4, 898–904Publication Date (Print):July 1, 1981Publication History Published online1 May 2002Published inissue 1 July 1981https://pubs.acs.org/doi/10.1021/ma50005a00…
Abstract Die drawing, a new process for the production of oriented thermoplastic rods with an ultrahigh modulus of elasticity, involves drawing an isotropic workpiece through a converging die at temperatures below the polymer melting point. Die drawing of polypropylene is described, but the process is applicable to an…
The combination of an inner layer of nacre and an outer layer of simple prisms is thought to be phylogenetically the oldest molluscan shell type. Although nacre is very strong it is not as widely used as crossed‐lamellar shell. Factors other than tensile strength or modulus of elasticity, such as resistance to abrasio…
Abstract AgBO 2 wurde durch Feststoffreaktion der binären Komponenten unter Anwendung von erhöhtem Sauerstoffdruck [p(O 2 ) = 2 kbar] dargestellt. Die Kristallstruktur von AgBO 2 (Raumgruppe Pbcn; a = 844,1(2); b = 868,0(1); c = 1974,1(5) pm) zeigt, daß ein BO 2 ‐Isopolyanion vorliegt, in dem Bor zu gleichen Teilen te…
The solar absorption properties of thin composite films of coevaporated Pt and Al2O3, formed with a graded composition-depth profile, are compared to those of an identical film overcoated with a microscopically textured layer of SiOx. The composition grade of the metal-dielectric composite and the surface texturing of…
Abstract The thermal diffusivity and conductivity of the isotropic and drawn samples of five semicrystalline polymers—nylon 6, poly(ethylene terephthalate), poly(butylene terephthalate), polybutene‐1, and poly(4‐methylpentene‐1)—were measured by the flash method over the temperature range 100–350 K. The temperature de…
ABSTRACT Breading losses from poor adhesion of coating to food products is a major concern in the battered and breaded foods industry. The primary aim of this study was to determine effects of protein and gum sources and amounts on the adhesion of a commercial breading mix to poultry skin. Protein sources used were wh…
When excited by the 6471-\AA{} line from a krypton laser, blue and uv fluorescence has been observed in La${\mathrm{F}}_{3}$: ${\mathrm{Tm}}^{3+}$ at room temperature. The main emission features have been identified as originating from the $^{1}D_{2}$ and $^{1}G_{4}$ levels, reached by a stepwise excitation process. A…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLow-temperature EPR studies of highly anisotropic low-spin (protoporphyrinato)iron(III) complexesCatharina T. Migita and Masamoto IwaizumiCite this: J. Am. Chem. Soc. 1981, 103, 15, 4378–4381Publication Date (Print):July 1, 1981Publication History Published online1 May 2002P…
The standard thermodynamic properties of phases in the lime-alumina-silica- water system between 273.15 and 1800 K at 101.325 kPa (1 atm) were evalated from published experimental data. Phases included in the compilation are boehmite, diaspore, gibbsite, kaolinite, dickite, halloysite, andalusite, kyanite, sillimanite…
Wild-type ebg enzyme, the second beta-galactosidase of Escherichia coli K12, does not permit growth on lactose. As part of a study of the evolution of new enzymatic functions, I have selected, from a lacZ deletion strain, a variety of spontaneous mutants that grow on lactose and other beta-galactoside sugars. Single p…
Abstract The effects of long‐term lime and K applications on quantity‐intensity (Q/I) relationships were investigated on the Ap and B21t horizons of a Kalmia soil (a fine‐loamy over sandy or sandy‐skeletal, siliceous thermic (Typic Hapludults) from the Delaware Coastal Plain. The predominant mineral suite of the <2…
The efficiency of the chemical cross-linking of polypropylene was found to be dependent on the peroxide used (dicumyl peroxide, benzoyl peroxide, t-butyl peroxide, and t-butyl peroxy-benzoate). The reason for different cross-linking efficiency of peroxide and enhancement of the cross-linking efficiency of peroxide in…
Abstract The diffusion of benzyl alcohol and plasticizer in compression‐molded sheets of plasticized poly(vinyl chloride) was studied over the temperature range 30–55°C. A simultaneous diffusion occurred for benzyl alcohol into polymer and for dioctyl phthalate as plasticizer from polymer into liquid when the polymer…
The influence of substrate temperature (20 °– 450 °C) and sputter gas pressure (0.5–100 Pa) on the evolution of coating morphology during growth of magnetron deposited copper films has been investigated for film thicknesses up to 10 μm. Classification of films according to structure and surface topography yields a str…
Abstract Weld or knit lines result wherever two or more polymer flow fronts unite. This results in a region of a different level of molecular entanglements than the bulk material. Consequently, weld regions have been observed to have inferior mechanical properties compared to the bulk. Although this phenomenon occurs…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDeformations from octahedral geometry in d4 transition-metal complexesPavel Kubacek and Roald HoffmannCite this: J. Am. Chem. Soc. 1981, 103, 15, 4320–4332Publication Date (Print):July 1, 1981Publication History Published online1 May 2002Published inissue 1 July 1981https://…