Materials Literature
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The permanent-magnet method for measuring critical current density in high-temperature superconducting thin films is numerically and experimentally investigated. Numerical results show that the critical current density is approximately proportional to the maximum repulsive force. Furthermore, the maximum repulsive for…
Abstract In an attempt to enhance the biocompatibility and mechanical strength of fibrous polymeric scaffold systems, nanocrystalline hydroxyapatite (HAp) particles were incorporated into the electrospun poly(L‐lactide) (PLLA) fibers and then mechanically interlocked using a vapor‐phase solvent adsorption method. The…
A sample of high-level radioactive tank waste was characterized to provide a basis for developing a waste simulant. The simulant is required for pilot-scale testing of pretreatment processes in a nonradiological facility. The waste material examined was derived from the bismuth phosphate process, which was the first i…
High kinetic-energy photoelectron spectroscopy (HIKE) or hard x-ray photoelectron spectroscopy has been used to investigate the alloying of Ni/Cu (100) multilayers. Relative intensities of the corelevels and their chemical shifts derived from binding energy changes are shown to give precise information on physicochemi…
Abstract BACKGROUND: Blends of epoxy resin oligomers, diglycidylether of bisphenol‐A (DGEBA), and a bislactone, 1,6‐dioxaspiro[4.4]nonan‐2,7‐dione (s(γBL)), were anionically copolymerized using two tertiary amines as anionic initiators. Their curing rheology and gelation behaviour were studied to provide a more compre…
Phase behavior of 1-alkyl-3-methyl imidazolium tetrafluoroborate ([C n mim][BF 4 ], n = 2 to 10), 6-(hydroxymethyl)oxane-2,3,4,5-tetrol and water has been determined at temperatures in the range of (242.15 to 308.15) K. Binodal curves, tie-lines, and the slope of the tie-line (STL) for [C 3 mim][BF 4 ]/[C 4 mim][BF 4…
Sc(III)-doped solids based on zeolite materials have been investigated for the first time as catalysts in organic synthesis. Sc(III)-USY zeolite proved to be a novel and very efficient heterogeneous catalyst for the Mukaiyama aldol reaction. This easy-to-prepare catalyst exhibited wide scope and compatibility with fun…
The ratio between the heat diffusion coefficients parallel and perpendicular to the magnetic field lines, χ || /χ ⊥ , influences the flattening of the temperature profile inside magnetic islands and the driving term of neoclassical tearing modes (Fitzpatrick 1995 Phys. Plasmas 2 825). The value of this anisotropy is,…
A layer-by-layer (LBL) approach has been developed to synthesize uniform CNT−metal nanocomposites at room temperature. As the representative examples, CNT−Pt, CNT−Pd, and CNT−Sn nanocomposites have been fabricated to illustrate the basic idea presented here. The morphology, structure, and composition of the as-synthes…
7,8-Dihydro-D-neopterin 2',3'-cyclic phosphate (H(2)N-cP) is the first intermediate in biosynthesis of the pterin portion of tetrahydromethanopterin (H(4)MPT), a C(1) carrier coenzyme first identified in the methanogenic archaea. This intermediate is produced from GTP by MptA (MJ0775 gene product), a new class of GTP…
β-Barium Borate (β-BBO or β-BaB 2 O 4 ) is an important nonlinear optical material with many practical applications. In this work, we have directly probed the local Ba environment in β-BBO by acquiring static 135 Ba and 137 Ba solid-state NMR spectra at an ultrahigh magnetic field of 21.1 T. The observed spectra are c…
The analysis of the electronic spectra of adenosylcobalamin (AdoCbl) and its derivative in which the trans axial base was replaced by a water molecule (AdoCbi–H2O) has been performed by means of time-dependent density functional theory (TDDFT). The latter corresponds to the situation encountered in strongly acidic con…
Vanadium cage catalysis: High selectivity of the epoxidation of propene with anionic cluster V4O11− is demonstrated on the basis of the first-principle calculations. Oxygen, proton, and negative charge transfers are the general reaction mechanisms (see figure) of the hydrocarbon oxidations by vanadium oxides.
Abstract BACKGROUND: This study investigated the synthesis of magadiite from a natural diatomite material. The influence of key reaction parameters, including reaction time, temperature and molar ratios of Na2O/SiO2 and H2O/Na2O, on the formation of magadiite were investigated. The as‐synthesized magadiite was charact…
The density of states (DOS)-based DC$I$–$V$model of an amorphous gallium–indium–zinc oxide ($a$-GIZO) thin-film transistor (TFT) is proposed and demonstrated with self-consistent methodologies for extracting parameters. By combining the optical charge-pumping technique and the nonlinear relation between the surface po…
The different niobium sites in a Dion−Jacobson triple-layered perovskite, RbSr 2 Nb 3 O 10, and its acid-exchanged version, HSr 2 Nb 3 O 10, were investigated by using solid state NMR and DFT methods. 93 Nb electric field gradient (EFG) and chemical shift anisotropy (CSA) tensor values were extracted and site assignme…
This paper reports an experimental and a theoretical study of the structures and standard (p(o) = 0.1 MPa) molar enthalpies of formation of the synthetic reagents 1,3-thiazolidine-2-thione [CAS 96-53-7] and 1,3-oxazolidine-2-thione [CAS 5840-81-3]. The enthalpies of combustion and sublimation were measured by rotary b…
The widespread utilization of sugars by microbes is reflected in the diversity and multiplicity of cellular transporters used to acquire these compounds from the environment. The model bacterium Escherichia coli has numerous transporters that allow it to take up hexoses and pentoses, which recognize the more abundant…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTpH-Controllable Depletion Attraction Induced by Microgel ParticlesXiaochen Xing, Zifu Li, and To Ngai*View Author Information Department of Chemistry, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong*To whom corresponden…
In DIII-D, experiments have been performed in hydrogen plasmas to determine the requirement for hydrogen operation in ITER. The H-mode threshold power has been determined to increase with input torque for both hydrogen and deuterium plasmas with the H-mode power threshold for hydrogen plasmas being greater by approxim…