Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Nd:YVO 4 thin films were grown by pulsed laser deposition (PLD) on single-crystal r -cut sapphire(11̄02) substrates, and the grain morphology and microstructure of the films were investigated as a function of substrate temperature and oxygen pressure employed during growth. Highly crystalline (200)-oriented films were…
Histidinol-phosphate aminotransferase (HspAT) is a key enzyme on the histidine biosynthetic pathway. HspAT catalyzes the transfer of the amino group of L-histidinol phosphate (Hsp) to 2-oxoglutarate to form imidazole acetol phosphate (IAP) and glutamate. Thus, HspAT recognizes two kinds of substrates, Hsp and glutamat…
The Computer-Aided Process Engineering Center (CAPEC) database of measured data was established with the aim to promote greater data exchange in the chemical engineering community. The target properties are pure component properties, mixture properties, and special drug solubility data. The database divides pure compo…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTFerromagnetic Coordination Polymer Composed of Heterocyclic Thiazyl Radical, 1,3,5-Trithia-2,4,6-triazapentalenyl (TTTA), and Bis(hexafluoroacetylacetonato)copper(II) (Cu(hfac)2)Wataru Fujita and Kunio AwagaView Author Information Department of Basic Science, Graduate…
Stability constants were measured for complexes formed between a modified DTPA ligand and the metal ions Gd(III), Eu(III), Fe(III), Ca(II), Cu(II), and Zn(II) at 25 degrees C in 0.1 M NaClO4. The gadolinium complex of this ligand is MS-325, a novel blood pool contrast agent for magnetic resonance imaging currently und…
The order parameters for the phenomenological description of the smectic-{\it A} to smectic-{\it C} phase transition are formulated on the basis of molecular symmetry and structure. It is shown that, unless the long molecular axis is an axis of two-fold or higher rotational symmetry, the ordering of the molecules in t…
The aim of this project was to study the preparation and characterization of nanosized Ca(OH) 2 particles. Synthesis of Ca(OH) 2 particles was performed at a high temperature, and diols were employed as the reaction media. The size and shape of the particles were found to be dependent on different experimental factors…
Beryllium nitride thin films were grown on silicon substrates by laser ablating a beryllium foil in molecular nitrogen ambient. The composition and chemical state were determined with Auger (AES), X-Ray photoelectron (XPS) and energy loss (EELS) spectroscopies. A low absorption coefficient in the visible region, and a…
We present high resolution Ag ${M}_{5}\mathrm{VV}$ and ${M}_{4}\mathrm{VV}$ Auger spectra obtained in coincidence with ${3d}_{5/2}$ and ${3d}_{3/2}$ core photoelectrons, respectively. Auger photoelectron coincidence spectroscopy (APECS) was used to separate these overlapping Auger lines and determine the intrinsic lin…
CO adsorption and oxidation over Au/Al 2 O 3 were studied by infrared (IR) spectroscopy at 150 K. Two types of CO adsorption were found on the support, Al 2 O 3, with the existence of gaseous CO (266 Pa). An additional band of adsorbed CO at 2110 cm -1 was found on Au/Al 2 O 3 at 150 K in the presence of gaseous CO an…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTOne-Dimensional Polymers of Octasubstituted PhthalocyaninesAnthony S. Drager, Rebecca A. P. Zangmeister, Neal R. Armstrong, and David F. O'BrienView Author Information C.S. Marvel Laboratories, Department of Chemistry University of Arizona, Tucson, Arizona 85721 Cite t…
Oxidation of the surface of cross-linked 1,4-polybutadiene provided a hydrophilic substrate that reconstructed against hot water to become more hydrophobic. Subsequent equilibration against water at room temperature returned its original hydrophilicity. These temperature-dependent changes in the relative concentration…
Hyperbranched poly(acrylic acid) and poly( N -isopropylacrylamide) grafts on gold and polyethylene films are good substrates for a new, mild hydrogen-bond-based grafting method. In this chemistry, a hydrogen-bond-donating or -accepting hyperbranched graft couples to a polymeric acceptor or donor in ethanol solution th…
Large deformation, nonlinear stress relaxation behavior was examined in the molten state for two types of ABS polymers, with one type containing well-dispersed rubber particles and the other, agglomerated rubber particles. These different morphologies were accomplished by adjusting the chemical composition of poly(sty…
Orbital ordering, often observed in Mott insulators with orbital degeneracy, is usually supposed to disappear with doping, e.g., in the ferromagnetic metallic phase of manganites. We propose that the orbital ordering of a novel type may exist in such a situation: there may occur an orbital ordering of complex orbitals…
We perform the density-functional and quantum chemical calculations of adsorption of a hydrogen molecule to various kinds of single-walled carbon nanotubes (SWNT's). The potential energy barrier height (PBH) for the dissociative adsorption of a hydrogen molecule onto the outer wall of a nanotube decreases as the tube…
A passive, matched two-time-derivative Lorentz material medium is designed to have its equivalent permittivity and permeability smaller than their values in free space over a large range of frequencies. Superluminal pulse propagation in this medium and consequent superluminal information exchange without a violation i…
We present a study of anisotropy of transport and magnetic properties in La_{1-x}Ca_{x}MnO_{3} (x \approx 1/3) film prepared by pulsed-laser deposition onto a LaAlO_{3} sunstrate. We found a non-monotonic dependence of magnetoresistance (MR) on magnetic field H for both H perpendicular and parallel to the film plane b…
A set of thin GaAs p-type negative electron affinity (NEA) photocathodes have been used to measure the yield of photoemitted electrons at high intensity excitation. The active layer thickness is 100 nm and the p-type doping ranges from 5\times10^{18} cm^{-3} to 5\times10^{19} cm^{-3} for a set of four samples. The res…
We propose a new approach to theoretical description of doped cuprate like $La_{2-x}Sr_{x}CuO_4$ and $YBa_2Cu_3O_{6+x}$, assuming phase separation and treating it as inhomogeneous composite material, containing the dielectric and metallic stripe-like nanoparticles. The formalism of effective medium theory is then appl…