Materials Literature
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Orthorhombic and rhombohedral single nanocrystalline KNbO3 with different morphologies was synthesized respectively at a relatively low temperature by simply changing the reaction solvent; a conceivable reaction process was illustrated based on the finding of a hexahedral intermediate product during the formation of K…
Thin films of CuPc of various thicknesses have been deposited ontoclean glass substrates using thermal evaporation technique at roomtemperature. The structural studies, using X-ray diffractometry and IR spectralanalysis, showed that the films are mainly of β- form with preferentialorientation of the plane (100). The d…
This research was carried out in three of the most important basins of the Colombian Amazon (Upper Solimões, Iça and Japurá Rivers). The creeks and lakes that were studied contain abundant diatom species, particularly those of the genus Eunotia. Ten species are described; five of them are registered for the first time…
Abstract Substrate‐supported polythianaphthene (PTN) films have been electrochemically synthesized by direct oxidation of thianaphthene on platinum or stainless steel electrode in mixed electrolytes of boron trifluoride diethyl etherate (BFEE) and trifluoroacetic acid (TFA). The oxidation potentials of the monomer in…
There is a current need for a small diameter vascular graft due to the limited supply of autogenous grafts and the failure of synthetic grafts due to thrombosis and/or intimal hyperplasia. The use of living cells and tissues to fabricate a small diameter graft (i.e., tissue engineered blood vessel, TEBV) could be usef…
The crystal structure of burnsite, KCdCu7O2(SeO3)2Cl9, a new mineral species from fumaroles of the Tolbachik volcano, Kamchatka, Russia, has been solved by direct methods and refined on the basis of F 2 for all unique data collected with monochromatic MoK X-radiation and a CCD (charge-coupled device) detector to an ag…
RATIONALE AND OBJECTIVE: To evaluate the contrast kinetics of gadobutrol for interstitial MR lymphography. MATERIALS AND METHODS: In 11 rats, 0.5 mL undiluted gadobutrol was injected subcutaneously into the hind paw. Contrast kinetics were measured in lymph nodes, kidney, liver, muscle, and blood of six animals using…
Abstract This paper characterizes when a Delone set X in is an ideal crystal in terms of restrictions on the number of its local patches of a given size or on the heterogeneity of their distribution. For a Delone set X , let N X ( T ) count the number of translation-inequivalent patches of radius T in X and let M X (T…
Acoustic cavitation is investigated experimentally and theoretically starting with a single bubble in an acoustic field. The single bubble is trapped in an acoustic resonator and observed by high-speed imaging and acoustic measurements following its transient dynamics to a possible steady state after generation by las…
The Tay Bridge disaster of 1879 shocked the world and led to important changes in bridge design, construction, and inspection. The Court of Inquiry produced its final report in six months, and condemned the structure for its design and materials defects. However, the court did not specify exactly how the final collaps…
Abstract Three Ultic Haplorthods with significant illuviation of clay and spodic materials in the subalpine forests located in the Alishan area of central Taiwan were selected to identify the clay mineral compositions by X-ray diffraction (XRD) and to explain the transformation of the clay minerals. The three pedons a…
The orientation dependence of slowness and electromechanical coupling coefficients of 0.92Pb(Zn1/3 Nb2/3)O3-0.08PbTiO3 (PZN-8%PT) domain engineered single crystal was analyzed based on the measured complete set of elastic, piezoelectric, and dielectric constants. There exist one quasi-longitudinal, one quasi-shear, an…
DDOA (2,3-bis( n -decyloxy)anthracene) has been successfully employed as a template to direct the growth of high-surface alumina-based fibers exhibiting bimodal porosity. Hybrid gels were obtained after thermal aging (at 40 °C) of an aqueous ethanol solution of AlCl 3 entrapped by a previously formed DDOA organogel. S…
The reactive sintering of 3Ti/SiC/C to form the layered ternary carbide Ti 3 SiC 2 was studied in situ by time‐resolved neutron powder diffraction. A number of intermediate processes occur during the synthesis beginning with the α‐β transition in Ti. Concurrent with the α‐β transition, two intermediate phases, TiC x a…
A pseudorotaxane monolayer consisting of a supramolecular complex generated between cyclo-bis(paraquat- p -phenylene), ( 1 ), and the 1,4-bis(mercapto ethyloxy ethyloxy ethyl)benzene monolayer, ( 2 ), that is stoppered by CdS nanoparticles (3−5 nm) is generated on Au electrodes. The surface coverage of the supramolecu…
We study segregation patterns in a hard-sphere binary model under gravity subject to sequences of taps. We discuss the appearance of the "Brazil nut" effect (where large particles move up) and the "reverse Brazil nut" effects in the stationary states reached by "tap" dynamics. In particular, we show that the stationar…
Abstract The colored isomer produced in 1,2-bis(2,5-dimethyl-3-thienyl)perfluorocyclopentene crystal upon irradiation with ultraviolet light showed an absorption maximum at 535 nm, which is 30 nm longer than that in hexane, 505 nm. The spectral shift is ascribed to the strained structure of the photogenerated closed-r…
To implement surface-enhanced Raman spectroscopy as a practical detection method, highly enhancing, stable, and reproducible substrates need to be fabricated in an efficient manner, and their performance in different solution environments should be well characterized. In this work structured porous gold films have bee…
Abstract PVC‐clay nanocomposites have been prepared by solution blending of the polymer with both sodium montmorillonite and an organically modified clay. The nanocomposites have been characterized by X‐ray diffraction and transmission electron microscopy; in all cases the materials are best described as mixed immisci…
In the present study, the room‐temperature properties of Al 2 O 3 ‐Ti 3 SiC 2 composites with different Ti 3 SiC 2 contents are determined. The composites are prepared by attrition milling Al 2 O 3 and Ti 3 SiC 2 mixture powders followed by spark plasma sintering (SPS) under vacuum. From a closer examination of the de…