K. Haruyama、Tadashi Nakai、I. Miyahara 等 7 位作者2001-03-24Biochemistry
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…
Protein Structure and DynamicsRNA and protein synthesis mechanismsEnzyme Structure and Function
Thomas L. Nielsen、Jens Abildskov、Peter M. Harper 等 5 位作者2001-03-24Journal of Chemical & Engineering Data
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…
Process Optimization and IntegrationPhase Equilibria and ThermodynamicsCrystallization and Solubility Studies
Wataru Fujita、Kunio Awaga2001-03-24Journal of the American Chemical Society
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…
Magnetism in coordination complexesMetal complexes synthesis and propertiesLanthanide and Transition Metal Complexes
Peter Caravan、Clara Comuzzi、William J. Crooks 等 6 位作者2001-03-24Inorganic Chemistry
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…
MRI in cancer diagnosisAdvanced MRI Techniques and ApplicationsLanthanide and Transition Metal Complexes
P. K. Karahaliou、A. G. Vanakaras、D. J. Photinos2001-03-24arXiv
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…
Materials ScienceSoft Condensed Matter
Barbara Salvadori、Luigi Dei2001-03-24Langmuir
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…
Nanomaterials for catalytic reactionsCatalytic Processes in Materials ScienceZeolite Catalysis and Synthesis
G. Soto、J. A. Diaz、R. Machorro 等 5 位作者2001-03-24arXiv
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…
Materials Science
D. A. Arena、R. A. Bartynski、R. A. Nayak 等 5 位作者2001-03-23Physical review. B, Condensed matter
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…
Advanced Chemical Physics StudiesElectron and X-Ray Spectroscopy TechniquesSurface and Thin Film Phenomena
Jifei Jia、Junko N. Kondo、Kazunari Domen 等 4 位作者2001-03-23The Journal of Physical Chemistry B
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…
Catalysis and Oxidation ReactionsGas Sensing Nanomaterials and SensorsCatalytic Processes in Materials Science
Anthony S. Drager、Rebecca A. Zangmeister、Neal R. Armstrong 等 4 位作者2001-03-23Journal of the American Chemical Society
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…
Porphyrin and Phthalocyanine ChemistryPhotochromic and Fluorescence ChemistrySupramolecular Self-Assembly in Materials
Sureurg Khongtong、Gregory S. Ferguson2001-03-23Journal of the American Chemical Society
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…
Polymer Nanocomposites and PropertiesRheology and Fluid Dynamics StudiesPolymer crystallization and properties
David E. Bergbreiter、Guoliang Tao、Justine G. Franchina 等 4 位作者2001-03-23Macromolecules
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…
Dendrimers and Hyperbranched PolymersMolecular Junctions and NanostructuresPolymer Surface Interaction Studies
Yuji Aoki、Akira Hatano、Takeshi Tanaka 等 4 位作者2001-03-23Macromolecules
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…
Polymer crystallization and propertiesTribology and Wear AnalysisPolymer Nanocomposites and Properties
Jeroen van den Brink、D. I. Khomskiǐ2001-03-23Physical review. B, Condensed matter
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…
Magnetic and transport properties of perovskites and related materialsRare-earth and actinide compoundsAdvanced Condensed Matter Physics
Kazuhiro Tada、Shunsuke C. Furuya、Kazuo Watanabe2001-03-23Physical review. B, Condensed matter
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…
Graphene research and applicationsCarbon Nanotubes in CompositesHydrogen Storage and Materials
Richard W. Ziolkowski2001-03-23Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics
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…
Orbital Angular Momentum in OpticsQuantum optics and atomic interactionsMetamaterials and Metasurfaces Applications
B. I. Belevtsev、V. B. Krasovitsky、D. G. Naugle 等 8 位作者2001-03-23arXiv
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…
Materials Science
G. A. Mulhollan、A. V. Subashiev、J. E. Clendenin 等 7 位作者2001-03-23arXiv
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…
physics.acc-phMaterials Science
A. S. Moskvin、E. V. Zenkov、Yu. D. Panov2001-03-23arXiv
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…
Materials ScienceStrongly Correlated Electrons
H. M. Christen、H. Y. Zhai、C. Cantoni 等 10 位作者2001-03-23arXiv
Thin superconducting films of magnesium diboride (MgB2) with Tc \approx 24K were prepared on various oxide substrates by pulsed laser deposition (PLD) followed by an in-situ anneal. A systematic study of the influence of various in-situ annealing parameters shows an optimum temperature of about 600C in a background of…
SuperconductivityMaterials Science