Materials Literature
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A new and simple procedure for determination of leakage reactance and analysis of electromagnetic forces that acting upon the transformer coils is presented in this paper. Before manufacturing and within the design process, it is required that we model the transformer and analyze the transformer condition using this m…
The microstructure of the high-temperature quenched oxides of the (1 − x) Y0.15Zr0.85O1.93 – x Y0.75Nb0.25O1.75 (0 ≤ x ≤ 1) system has been investigated by selected area electron diffraction and high resolution transmission electron microscopy. We have found three types of fluorite structure: the x = 0 end member of t…
The temperature dependence of electrical conduction current in additive-free poly-L-lactic acid was measured from 20 °C to 90 °C under application of dc 2.5 kV. Although the current obeys the Arrhenius formula, a hump appears in some conditions, depending on whether the temperature is being ascended or descended, and…
Infrared spectra for the O-H stretching vibration, , region were studied for Sc- and Y-doped and Y-doped ceramics. For Sc-doped and Y-doped , two intense bands at and were observed for the low doping level. With increasing doping level, two bands at and appeared in addition to the bands at and and increased their inte…
We present confocal microscopy studies of novel particle-stabilized emulsions. The novelty arises because the immiscible fluids have an accessible upper critical solution temperature. The emulsions have been created by beginning with particles dispersed in the single-fluid phase. On cooling, regions of the minority ph…
The evolution of fragipans in the Great Lakes region is poorly understood despite the common occurrence of fragipans in the region. To help resolve this problem, three soils with fragipans in northern Michigan were studied to evaluate the pedogenic pathways for fragipan evolution, and the results extended to soils for…
The polymerization of aniline by Cu(II) montmorillonite was studied using attenuated total reflection Fourier-transform infrared (ATR-FTIR) spectroscopy. Experimental spectra were compared with that calculated by AM1, PM3, PM5, MINDO, Hartree-Fock, HF/6-31g(d), as well as Density Functional Theory, BLYP/DZVP and B3LYP…
ABSTRACT Samples of epiphytic diatom assemblages found on prop roots of red mangrove (Rhizophora mangle) from four sites were collected at two tidal levels of exposure on two different dates from the cool season (autumn, spring). The overall floristic analysis yielded 171 diatom taxa, including 16 new records for the…
Electrochemical impedance, cyclic voltammetry, and chronoamperometry have been used for characterization of the medium-temperature half-cells (Sys 1), (Sys 2), and (Sys 3) at various electrode potentials and temperatures. Analysis of the impedance data shows that the kinetically mixed process is probable, characterize…
A preparative route for a nanocrystalline CdSe/polymer nanocomposite that is easily integrated into photovoltaic device fabrication has been developed. Microwave assisted synthesis is used to initiate the reaction of relatively safe, inexpensive and air stable precursors. Particles size may be varied from 20 Å to 60 Å…
investigated by measuring its conductance and mass changes by using a fourprobe method, elemental analysis, and X-Ray fluorescence (XRF) technique. The prepared films were exposed to hydrogen halides, hydrogen cyanide, hydrogen sulphide, halogens, acetic acid, mono-, di-, and trichloroacetic acid, formaldehyde, hexach…
InnoPol, a poly((D,L)-lactic-co-glycolic acid) [PLGA] 65/35 scaffold manufactured by special gas foaming methods in Korea, was subjected to tests to evaluate the degradation and tissue compatibility characteristics and long-term systemic toxicity in mice and rats. C57BL/6 mice and SD rats were implanted subcutaneously…
Characterization of the stability of ceramic suspension for slurry introduction in inductively coupled plasma optical emission spectrometry (ICP-OES) and its application to the analysis of aluminium nitride (AlN) was reported in this paper. Stability and homogeneity suspensions of μm sized AlN and nm sized AlN, as the…
The copper(II) complexes, [CuII 3(μ3-OH)(μ-pz)3(Hpz)(Me3CCOO)2]·(Me3CCOOH)2 (1) (Hpz = pyrazole) and CuII(Hpz*)2(Me3CCOO)2 (2) (Hpz* = 3,5-dimethylpyrazole), were obtained from the reactions of Cu(NO3)2·3H2O with Me3CCOOK and Hpz/Hpz* in ethanol. The complex 1 is made up of a trinuclear core [Cu3(μ3-OH)]5+ with a near…
We fabricated nanotube (CNT) composites by coating the CNTs with an amorphous layer using metallorganic chemical vapor deposition followed by postannealing at a relatively low temperature of 350°C. It was found that the kind of gas used during the postannealing process should affect the nanostructure of the composites…
It is shown that hydrogen peroxide enhances substantially selective reduction of NOx to nitrogen with hydrocarbons over Ag/alumina catalysts.
In this letter, we present a preliminary study on fabrication of ZrO2 nanofibers by electrospinning a sol-gel precursor solution with subsequent calcination process. The resultant nanofibers have an average diameter less than 40 nm and can be produced uniformly and repeatedly. Nanofibers with diameter as small as 13 n…
A technique for controlling the thickness profile of a thin film in physical vapor deposition systems is reported. The technique uses a novel mask design with apertures of varying dimension to selectively deposit the required film thickness at predetermined locations across the aperture of the substrate. The technique…
ROLDÁN-PALLARÉS, MANUELA MD, PhD; AMBIT AVILA, MARÍA ISABEL PhD; REFOJO, MIGUEL F. DSc Author Information
Abstract A synthetic hydromagnesite obtained from an industrial by‐product rich in magnesium oxide was employed and evaluated as a non‐halogenated flame retardant for poly(ethylene‐co‐vinyl acetate). The filler was characterized with different techniques (such as specific surface area, TGA, particle morphology and siz…