Materials Literature
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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…
Abstract A new hexanuclear copper( II ) sandwich complex based on two 10‐membered macrocyclic phenylsiloxanolate ligands, {Cu 6 [(C 6 H 5 SiO 2 ) 5 ] 2 (OH) 2 (C 10 H 8 N 2 ) 2 } · 4(DMF) · 3(H 2 O) ( 1 ), was synthesized and characterized by single‐crystal X‐ray diffraction and measurements of the magnetic susceptibi…
Abstract The effect of fluids on recrystallization behaviour is well known; however, the detailed microscale distribution of fluid in grain boundaries and the influence of fluid on grain boundary migration are still unresolved. In this study, in‐situ deformation experiments in transmitted light microscopy were underta…
Results of thorough studies of the catalytic synthesis of carbon nanofibers (CNFs) by the decomposition of ethylene using Y zeolite as the support and Ni as the active phase were discussed. Experimental results clearly indicated that the metal-incorporation method (ion exchange or impregnation) had very significant ef…
Peptide secondary structure mimetics are important tools in medicinal chemistry, as they provide analogues of endogenous peptides with new physicochemical and pharmacological properties. The development, synthesis, photochemical investigation, and conformational analysis of a stilbene-type beta-hairpin mimetic capable…
Addition of Bi prevents deactivation of Pd–Sb catalysts in the acetoxylation of toluene. The presence of Bi hinders the formation of an inactive Pdδ− state and the blockage of the active Pd sites by carbon species from coke deposits (see the photoelectron spectrum). The modified catalyst displays extremely high select…
A high creep resistance at specified temperature and compressive stress was obtained in this investigation in the silicon nitride/silicon carbide composite with a nano–nano structure (nanosized SiC and Si 3 N 4 in dual‐phase mixture) by a novel synthesis method. Starting from an amorphous Si–C–N powder derived from py…
Abstract Biodegradable poly( L ‐lactide‐ co ‐ε‐caprolactone) copolymers with different L ‐lactide (LLA)/ε‐caprolactone (CL) ratios of 75/25 and 50/50 were electrospun into fine fibers. The deformation behavior of the electrospun membranes with randomly oriented structures was evaluated under uniaxial tensile loading.…
Sr 1− x Ba x Bi 2 Nb 2 O 9 ( x =0, 0.2, 0.4, 0.6, 0.8 and 1) ceramics were prepared by a conventional solid‐state reaction method. Their structure and dielectric properties were investigated. X‐ray diffraction analysis indicated that single‐phase layered perovskites were obtained. A relaxor behavior was observed in Ba…
Three dodecanuclear Mn clusters [Mn12O10(OMe)3(OH)(O2CC6H3F2)16(MeOH)2].8MeOH (1), [Mn12O10(OMe)4(O2CBu(t))16(MeOH)2] (2), and [Mn12O12(O2CBu(t))16(MeOH)4] (3) synthesized by reductive aggregation reactions are reported. Clusters 1 and 2 possess a central alkoxide-bridged planar Mn4 topology, whereas 3 is a new high-s…