Materials Literature
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We present an extension of the rigorous coupled-wave analysis technique to analyze second-harmonic generation (SHG) in periodic optical nanostructures in the undepleted-pump approximation. We apply this method to analyze SHG in two example nanostructures for which we predict enhanced nonlinearity due to transverse nea…
Abstract Fracture initiation and fracture propagation toughening (R‐curve behavior) of polyamide 6,6 (PA‐66) polymers with different types of layered silicate clay having nanoscale (fully dispersed) or multiscale (mixed nanoscale/microscale) structure were studied. These results were compared to fracture data for conv…
Inverse Fourier transform method has been commonly used for designing complex inhomogeneous optical coatings. Since it assumes dispersion-free optical constants, introducing real optical materials induces shifts in the position of reflectance bands in multiband inhomogeneous minus (rugate) filters. We propose a simple…
Poly(butyl cyanoacrylate) nanoparticles coated with polysorbate 80 (Tween 80) enable the transport of a number of drugs across the blood-brain barrier (BBB) into the brain following intravenous injection. These drugs include the hexapeptide endorphin dalargin, the dipeptide kytorphin, loperamide, tubocurarine, doxorub…
The Escherichia coli fabG(Ec) gene and the Pseudomonas aeruginosa rhlG(Pa) gene, which encode 3-ketoacyl-acyl carrier protein reductase, were expressed in E. coli W3110 and its fadA mutant strain WA101 to examine their roles in medium-chain-length (MCL) polyhydroxyalkanoate (PHA) biosynthesis from fatty acids. When on…
The corrosion behavior of Al 2024-T3 (UNS A92024) exposed to artificial seawater (AS) and Luria Bertani (LB) medium has been studied using electrochemical impedance spectroscopy (EIS). Tests were performed in sterile media and in the presence of three different biofilm-forming bacteria: a Bacillus subtilis biofilm tha…
Porous-silicon (PS) based multilayer periodic structures with photonic bandgaps (PBGs) and PS single layers that have a strong in-plane birefringence are produced by the electrochemical nanostructuring of crystalline silicon wafers of different crystallographic orientations. Calculations and experiments demonstrate th…
The ability of portable electronic products like cellular phones and personal digital assistants to withstand accidental impacts and shock is a valuable attribute consumers expect and manufacturers desire. Usually, manufacturers conduct expensive experimental drop tests to determine the fragility of such products duri…
Summary The organic matter in soils may be stabilized by its interactions with minerals. We have studied such interactions in a Haplic Alisol under forest in which clay and organic matter have migrated from an eluvial A horizon to accumulate in an illuvial B horizon. We have tried to trace the fate of organic matter i…
The gas flow rates for hazardous air pollutant emissions are generally large and their concentrations are low (in parts per million levels). When we try to directly treat the large flow rate and low concentration exhaust gas, the size of the equipment becomes large, resulting in high operating cost. The objective of t…
ABSTRACT: The dissolution kinetics and mechanical properties of whey protein concentrate (WPC) gels were investigated as part of a general study on cleaning mechanisms of milk fouling. The dissolution results showed that the WPC gel is a suitable model material to simulate milk fouling and the dissolution process is a…
Si 3 N 4 /SiC composite ceramics were sintered and subjected to three‐point bending. A semi‐elliptical surface crack of 100 μm surface length was made on each specimen. The crack‐healing behavior under cyclic stress of 5 Hz, and resultant cyclic fatigue strengths at healing temperatures of 1100° and 1200°C, were syste…
Abstract The crystal structure of kröhnkite [Na 2 Cu(SO 4 ) 2 ·2H 2 O], which contains infinite chains composed of CuO 6 octahedra corner-linked with SO 4 tetrahedra, was originally determined 1952 by Dahlman. Since then, a large number of both minerals (e.g., collinsite, fairfieldite, etc.) and synthetic compounds wi…
Effects of Ni or Mn doping in (Ba0.5Sr0.5)TiO3 thin films on leakage current behaviors of Pt/(Ba0.5Sr0.5)TiO3/Pt capacitors were investigated. The leakage current level was found to reduce significantly after the doping over a wide range of voltages and temperatures. The leakage current in an undoped capacitor was lar…
The synthesis and characterization of five homologous series of symmetrical compounds composed of banana-shaped molecules containing a biphenyl moiety are reported. All these compounds are non-Schiff's bases and are esters. The effects of lateral substituents such as fluoro, methyl and ethyl in the side arms of these…
We report on the micromagnetic properties of highly regular hexagonal arrays of Ni nanowires, fabricated by means of electrodeposition in self-ordered porous alumina. Arrays with interpore distances of 65 and 100 nm and pore diameters of 25 and 30 nm are investigated. From hysteresis loops obtained from measurements w…
Cobalt doped zinc oxide films Zn/sub 1-x/Co/sub x/O with the atomic fraction x in the range 0.035-0.115 were prepared by sputtering from composite ZnO/Co/sub 3/O/sub 4/ targets. X-ray diffraction pattern shows the ZnO phase with [002] preferential orientation. Magnetic measurements show ferromagnetic behavior with Cur…
Abstract Moisture diffusion was studied through vinyl ester samples containing up to 5 wt% of organically treated montmorillonite. Two different kinds of clay surface treatment were employed to make the clay compatible with Derakane TM 411‐350 vinyl ester resin. The nanocomposites were characterized using differential…
X-ray powder data originally published for the zeolite mineral goosecreekite are of poor quality. The new data reported here for material from Norway are compared with powder data calculated from the published structure. The cell is monoclinic (space group P 2 1 , Z =2), a =7.422(2) Å, b =17.414(4) Å, c =7.288(2) Å, β…
A measuring system for investigation of the anisotropy of electrical steel is proposed. Both anisotropy of the whole sample and surface distribution of anisotropy can be determined. A sample of electrical steel in the form of a sheet was magnetized by a rotating yoke and the local value of magnetic field strength was…