Materials Literature
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We present a theory whose goal is to account for the recent exciting hysteresis experiments on the spin cluster crystal Mn 12 -acetate that indicate the occurrence of spin tunneling. We have found the tunneling probability P for the tunneling of spin from one spin state into another at a spin level crossing in respons…
We describe a synthetic method for the formation of surfactant-templated periodic mesoporous silica thin films. The films, when deposited between 0.22 < t/t gel < 0.67, are crack-free, consist of aggregated submicrometer particles, each of which contains the familiar honeycomb arrangement of 30−40 Å diameter channels,…
The effect of partial substitution on the hydrogen storage properties of Mg 2 Ni was investigated. It was found that as a result of substitution of Mg with a more electronegative element (Al or Mn), absorption of hydrogen easily occurs at lower temperature. The alloy powder prepared with a mechanical grinding method w…
We demonstrate how to construct dynamic phase diagrams for complex fluids that undergo transitions under flow, in which the conserved composition variable and the broken-symmetry order parameter (nematic, smectic, crystalline, etc.) are coupled to shear rate. Our construction relies on a selection criterion, the exist…
Biofiltration is a popular method for removing volatile organic compounds (VOCs). One promising medium for biofilters is biomass encapsulated gel beads. Like any other biodegradation system, oxygen concentration is an important factor affecting microbial activities in gel beads and thus the VOC removal efficiency. Thi…
High-performance composites were made of knitted fabrics using weft insertion. The stitch was formed by means of thermoplastic yarns (PA6 or PETP); the weft yarns were E-or S2-glass yarns. These fabrics were very flexible and well-suited to produce doubly curved components. Then eight layers of these fabrics were pres…
Fran Ertl; Procedure Modification of AOAC Official Method 962.17, Volatile Oil in Spices, Journal of AOAC INTERNATIONAL, Volume 80, Issue 4, 1 July 1997, Pages
Abstract The dilute‐solution behavior and liquid crystal formation of cellulose tris(3,5‐dimethylphenylcarbamate) (CTDC) in 1‐methyl‐2‐pyrrolidone (NMP) at 25°C are discussed by summarizing our recent studies, and its molecular characteristics are compared with those of cellulose tris(phenylcarbamate) (CTC) in the sam…
In this study a block oriented modelling technique was introduced in order to simulate the intermittent drying technology process. First, the relevant blocks of the parameters concerning to drying air and the properties of material to be dried were developed. These blocks were then used to set up the full modell of a…
Binary systems of ketones and aldehydes as proton acceptors with different donors were investigated. The existence of different hydrogen bonded liquid crystalline associates was proven by the induction of the smectic A phase as well as by IR-spectroscopic measurements.
Abstract Rheo‐optical Fourier transform infrared spectroscopy was used to analyze the orientational behavior of hard and soft segments of thermoplastic poly(ether urethane)s (TPU‐Et) and poly(ester urethane)s (TPU‐Es) and their blends with a 20 mass‐% contribution of either polyethylene (PE) or polypropylene with an a…
Electron spin resonance (ESR) spectra of 3-ethoxy-2-oxobutyraldehydebis( N, N -dimethylthiosemicarbazonato)copper(II) (CuKTSM 2 ) and copper(II) tetraphenylporphyrin (CuTPP), in paraffin oil at various temperatures, as well as in oriented dimyristoylphosphatidylcholine bilayer membranes, at 25 °C, were simulated using…
Catalytic activity of alkali metal carbonates was studied for the combustion of activated carbon grains at 673−773 K by supporting the carbonates on carbon, alumina, and a perovskite-type oxide (La 0.8 Sr 0.2 Cr 0.5 Mn 0.45 Pt 0.05 O 3, LSCMP). Catalytic activity of V 2 O 5 /γ-Al 2 O 3 as a typical transition metal ox…
Solution spectroscopic and chemical behavior was examined in the case of the homoleptic hydridic anion of iron [FeH(6)](4)(-). Examination of the UV-visible spectrum in THF revealed a LMCT band which occurs at 41 x 10(3) cm(-)(1) (epsilon = 1200 L mol(-)(1) cm(-)(1)). A manifold between 470 and 500 nm was consistent w…
This work reports a statistical analysis of the evolution of polygranular segment lengths during high-temperature annealing of Al(Cu) thin-film interconnects with quasi-bamboo microstructures. To create samples of Al(Cu) lines that could be imaged by transmission electron microscopy without breaking or thinning, the l…
The reaction kinetics of crosslinked low density polyethylene (LDPE) foam systems has been investigated. Dicumyl peroxide (DCP) was used as the crosslinker. The crosslinking reaction of LDPE/DCP system is controlled by a first order decomposition of DCP. The reaction kinetics of a chemical blowing agent, azodicarbon a…
To elucidate the interaction mechanism of water-soluble copper(II) tetrakis(4- N -methylpyridyl)porphyrin (Cu II (TMpy-P4)) with synthetic polynucleotides such as poly(dA-dT) 2 and poly(dG-dC) 2, the exciplex formation dynamics of photoexcited Cu II (TMpy-P4) with added polynucleotides have been investigated by using…
ADVERTISEMENT RETURN TO ISSUEPREVNotePreparation of Silica−Lignin XerogelJun'ichi Hayashi, Tetsuo Shoji, Yuuki Watada, and Katsuhiko MuroyamaView Author Information Department of Chemical Engineering, Kansai University, 3-3-35 Yamate-cho, Suita, Osaka 564, Japan Cite this: Langmuir 1997, 13, 15, 4185–4186Publication D…
The impedance response of a Pt/YSZ (yttria‐stabilized zirconia) interface at 900°C is modified by the passage of direct currents. The initial steady‐state impedance spectra are different from those taken after current interruption. The latter evolve toward a new steady state. The magnitude and equilibration kinetics o…
An investigation is made of electric fields induced in natural dielectrics by mechanical loading and electrical polarization. It is shown that the relaxation of the polarization is identical in nature for both cases and is basically a thermally activated process. The temperature dependence is obtained for the relaxati…