Materials Literature
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Small ${(\mathrm{Be}{\mathrm{B}}_{2})}_{n}$ clusters ($n=1--6$ and 8) as well as $\mathrm{Be}{\mathrm{B}}_{2}$ nanotubes and cages ${(\mathrm{Be}{\mathrm{B}}_{2})}_{n}$, with $n=10$, 12, 15, 18, and 30, have been studied using density functional theory. These nanostructures strongly resemble the ones formed by carbon,…
Physical and chemical properties of Sr 9 Fe(PO 4 ) 7 and Sr 9 FeD(PO 4 ) 7 were investigated by Mössbauer, infrared, and Raman spectroscopy, magnetization and dielectric measurements, differential scanning calorimetry, and thermal analysis. Sr 9 Fe(PO 4 ) 7 undergoes an antiferroelectric-paraelectric (AFE-PE) phase tr…
Nanocrystalline CeO 2 as small as 5 nm was successfully prepared by the precipitation method using hydrogen peroxide as an oxidizer. The methane oxidation temperature of this nanocrystalline CeO 2 dropped about 100°C as compared with microcrystalline CeO 2 .
An open capsule-type octanuclear heterometallic sulfide cluster without an intramolecular inversion center [Ru(eta(6)-C(6)Me(6)){P(OMe)(3)}{MoO(mu(3)-S)(3)}(CuI)(2)](2) (5) has been synthesized for the first time by stepwise connection of three mononuclear building blocks, i.e., (i) [RuCl(2)(eta(6)-C(6)Me(6)){P(OMe)(3…
Metal ion complexes of semiquinone radical anions exhibit different types of thermochromism depending on metal ions and quinones. Metal ion complexes of 1,10-phenanthroline-5,6-dione radical anion (PTQ(.-)) produced by the electron-transfer reduction of PTQ by 1,1'-dimethylferrocene (Me(2)Fc) in the presence of metal…
The dynamic dielectric response of epitaxial $\mathrm{Pb}{\mathrm{Mg}}_{1∕3}{\mathrm{Nb}}_{2∕3}{\mathrm{O}}_{3}$ thin films was experimentally studied as a function of amplitude of ac electric field including very large amplitudes (to $10\phantom{\rule{0.3em}{0ex}}\mathrm{MV}∕\mathrm{m}$). For all amplitudes, a typica…
Recently, a myofibril-bound serine proteinase (MBSP) in the skeletal muscle of silver carp was identified. MBSP could be dissociated from myofibrils by treatment at pH 4.0. Following ultrafiltration concentration and chromatography on Sephacryl S-200, High Q ion-exchange and affinity column of Arginine Sepharose-4B, M…
We report completely optimized ONIOM DFT/AM1 molecular orbital calculations on several collagen-like triple helices based upon the repeating triad, ProProGly. The requirement of Gly as every third amino acid in collagen can be attributed to its enantiomorphic nature, as it behaves as a Damino acid in collagen. We, the…
A detailed study on a room temperature magnetic refrigerator using these alloys with a permanent magnet has been carried out. Gd-Si-Ge system alloys were prepared by using the Gd with purity of 99.9 wt%. The permanent magnet was shaped as a cylinder in which an uniform magnetic field is 1.4 T. The two beds of this rec…
Tissue engineering research has been on going for many years, people are making all the effort to explore the cell functions in cellular level and even in molecular level. Making the cells functional in an in vitro environment is a preliminary goal for the implantation and repair of complicated tissues/organs. Fabrica…
β‐spodumene glass–ceramics with a whisker‐like microstructure were prepared from the following materials (in wt%): 64.5 SiO 2 , 18.0 Al 2 O 3 , 4.2 Li 2 O, 4 ZrO 2 , and 8 MgF 2 . Scanning electron microscope (SEM) analysis showed that phase separation in the base glass leads to the formation of a primary crystal phas…
A three‐dimensional, object‐defined Monte Carlo simulation is applied to alumina‐silicon carbide whisker ceramic matrix composites. The simulation takes whisker orientation and size distributions into account simultaneously, and calculates a connectivity factor that relates whisker conductivity to macroscopic conducti…
Catalytic activity of Au-Pt, Au-Pd, and Pt-Pd dendrimer nanocomposites for reduction of p-nitrophenol was investigated in water. The bimetallic dendrimer nanocomposites were prepared by simultaneous reduction with sodium borohydride in the presence of poly(amidoamine) (PAMAM) dendrimers with amine and carboxyl termina…
A thorough review of the literature on the structure, growth kinetics and decomposition of (corrosion) layers formed upon the reaction of LiH and other lithium compounds with atmospheric gases, particularly water, suggests that simple models, consistent with thermodynamics, similar to those postulated to explain corro…
Abstract The effect of glassy skin formation on the drying of semicrystalline polymers was investigated with a comprehensive mathematical model developed for multicomponent systems. Polymers with high glass‐transition temperatures can become rubbery at room temperature under the influence of solvents. As the solvents…
We report first‐principles density functional theory calculations of interstitial oxygen in tin‐doped indium oxide (ITO), a transparent conducting oxide. Interstitial oxygen plays a critical role in the defect of ITO because it is by removal of interstitial oxygen that n ‐type charge carriers are produced. The Frank a…
Using electron diffraction, we demonstrate that the fibrous calcium–silicate–hydrates (C–S–H) of tricalciumsilicate (C 3 S) hydration possess a crystalline structure. The crystalline nature was revealed by limiting the electron dose, which is common in electron microscopy of biomacromolecules. Compared with room tempe…
The glass transition temperature increases and the thermal expansion coefficient and density decrease with increasing B 2 O 3 concentration in a series of (100− x )(50BaO–50P 2 O 5 )− x B 2 O 3 where x =0–10 mol% for bulk samples. According to Raman spectroscopy, the bulk BaO–P 2 O 5 –B 2 O 3 (BaP–B) glasses consist o…
[reaction: see text] The enantiomeric excess of three different asymmetric catalyses has been predicted in excellent agreement with the experiments using a 3D-QSPR approach. In particular, GRid INdependent Descriptors generated from molecular interaction fields together with a simple partial least-squares method were…
The present study addresses the synthesis and characterization of a series of columnar liquid crystal compounds based on the natural porphyrin hemin. These compounds, which have different alkyl side chains (Alk = butyl, octyl, dodecyl, and hexadecyl) and either free base (M = 2H) or metalated (M = Zn, Cu) porphyrin co…