Materials Literature
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The biotransformation of progesterone by Colletotrichum lini AS3. 4486 was studied. The formation of the product was monitored by HPLC. Product was purified from broth culture supernatants by silica gel column chromatography and identified as 7β,12β-dihydoxylprogesterone with MS, 1H NMR, 13C NMR and NOE.
State of the art grating couplers for horizontal single and double slot waveguides are presented; in these devices the input signal is transmitted from a single mode optical fiber to silicon on insulator slot waveguides. In the waveguides, atomic layer deposited (ALD) high-k dielectrics form the low refractive index s…
Our goal in this work is to achieve a tunable photonic crystal micro-opto-electro-mechanical system which excites two resonances with opposite polarization. In order to get a polarization selectivity we use two-dimensional photonic crystals with periodically arranged elliptical holes. We investigate the tunability and…
Polyethylene terephthalate (PET) fiber is a kind of widely used textile fiber due to its some desirable properties. However, it limited its application in clothing because of poor hydrophilic property and high static electric. In order to improve hydrophilic and antistatic properties of PET fabrics, β-cyclodextrin (β-…
We present the characterization of the nonlinear-dynamics of a CMOS-compatible horizontal-slot waveguide with silicon-nanocrystals, where the temporal behavior of the phase and amplitude of the nonlinear response are simultaneously monitored. These results are complemented with four-wave-mixing measurements.
The application of activated carbon (AC) supported Fe-Cu-K catalyst for Fischer-Tropsch synthesis (FTS) is studied. The catalyst prepared using the AC as support showed remarkably improvement of reaction performance. The improvement of the reaction performance obtained for the AC is probably ascribed to the physical s…
Light emitting p-i-n diodes consisting of Er-doped SiO2/nc-Si multilayers and a novel lateral electrical pumping geometry are demonstrated in forward bias. Erbium electroluminescence and photoluminescence spectra are identical.
In this study, concrete prisms were made with three mineral admixtures: fly ash, blast furnace slag or silica fume and with three water-to-binder ratios(w/b). Chloride penetration was measured by the rapid chloride permeability test (RCPT)-ASTM C1202, 150-days ponding test and alternate wetting and drying test by cycl…
Fused quartz granules (d50=19 μm) were used as raw material, and Si3N4-Y2O3 (1:1, in mass) was used as additive with dosages of 1%, 2% and 3% (in mass). Fused quartz ceramic materials were fabricated in reduction atmosphere at 1300 °C, 1350 °C and 1400 °C for 1 h. The effect of Si3N4-Y2O3 on crystallization and sinter…
In this paper we present the increased light emission for Si p-i-n light emitting diodes (LED) by geometrical scaling of the injector size for p- and n-type carriers. TCAD simulations and electrical and optical characteristics of our realized devices support our findings. Reducing the injector size decreases the diffu…
We propose an approach useful for the evaluation of electrical conductivity of nanocomposite materials. We consider the modeling of a polymeric matrix with gold nanoparticles by evaluating the electrical coupling of spherical gold nanoparticles embedded in chitosan polymer. The electrical coupling is generated by a vo…
This paper focuses on a power quality improvement project for an oilfield drilling rig electrical system. For economic reason, an active current compensator and a passive current compensator are designed against features of power system in oilfield drilling rig. And then the current detection point arrangement of this…
Abstract Due to their high sensitivity to oxygen, the use of refractory metals requires an effective protection against oxidation. In the case of molybdenum this is achieved by using a silicon and boron based coating commercially marketed under the trade name SIBOR®. In the moduction of a SIBOR®-coating, a mixture of…
In this paper polyurethane (PU) / polyaniline (PANI) nanofibers were successfully prepared via electrospinning with N, N-dimethylformamide (DMF) and tetrahydrofuran (THF) mixture (1:2 mass ratio). The morphology, diameter and structure of the electrospun nanofibers were examined by scanning electron microscopy (SEM) a…
In this study, Jute fibers reinforced polypropylene (JFRP) composites were manufactured by injection molding technique. In order to improve the affinity and adhesion between fibers and thermoplastic matrices during manufacturing, Maleic anhydride (MA) as a coupling agent have been employed. Untreated and treated surfa…
We present a comparison of continuum k · p and atomistic empirical Tight Binding methods for the analysis of the optoelectronic properties of InAs/GaAs quantum dots.
Las muestras de Pb1-xLaxTiO3 (PLT), fueron preparados por el método convencional de mezcla de óxidos de alta pureza sinterizadas a una temperatura de 1200ºC, con composiciones x = 0.0, 2.5, 5, 10,15 y 20 %. Las muestras fueron analizadas mediante espectroscopia micro Raman para observar la transición de fase estructur…
A compact model for early electromigration failures in copper dual-damascene M1/via structures is proposed. The model is derived based on relevant physical effects of the early failure mode, where a rigorous void nucleation model and a simple mechanism for slit void growth are considered. As a result, a simple analyti…
One kind of bismaleimide resin (BMI) was prepared from Michael addition reaction with modification carbon nanotubes (m-CNTs). CNTs were modified by N-phenyl maleimide (N-PMI) and ethylenediamine. The effect of modification was determined by NMR spectra and Raman Analyser. The cure kinetics, thermal behavior and mechan…
Harmonic source identification is one of the most important power quality problems in the modern power systems. With the widespread application of the nonlinear power electronic devices, quantifying the individual responsibility of every distributed harmonic source becomes an urgent task. In this paper, a new responsi…