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Gene Transfers Shaped the Evolution of De Novo NAD + Biosynthesis in Eukaryotes

Chad M. Ternes、Gerald Schönknecht2014-08-27Genome Biology and Evolution

NAD(+) is an essential molecule for life, present in each living cell. It can function as an electron carrier or cofactor in redox biochemistry and energetics, and serves as substrate to generate the secondary messenger cyclic ADP ribose and nicotinic acid adenine dinucleotide phosphate. Although de novo NAD(+) biosyn…

Photosynthetic Processes and MechanismsEnzyme Structure and FunctionBiochemical and Molecular Research

Spin-Hamiltonian Parameters of Gd3+ Ion in the Room Temperature Tetragonal Phase of BaTiO3

Weiqing Yang、Wen‐Chen Zheng2014-08-27Zeitschrift für Naturforschung A

Abstract The spin-Hamiltonian parameters (g factors g||, g⊥, and zero-field splittings b0 2 , b0 4 , b4 4 , b0 6 , b4 6 ) of the 4f7 Gd3+ ion in the tetragonal phase of a BaTiO3 crystal are calculated through the diagonalization (of energy matrix) method based on the one-electron crystal field mechanism. In the calcul…

Advanced Chemical Physics StudiesPhotorefractive and Nonlinear OpticsElectron and X-Ray Spectroscopy Techniques

Purification, crystallization and preliminary crystallographic analysis of the 16S rRNA methyltransferase RsmI from Escherichia coli

Mohan Zhao、Li Wang、H. Zhang 等 7 位作者2014-08-27Acta Crystallographica Section F Structural Biology Communications

RsmI and RsmH are AdoMet-dependent methyltransferases that are responsible for the 2'-O-methylation and N(4)-methylation of C1402 of Escherichia coli 16S rRNA, respectively. Modification of this site has been found to play a role in fine-tuning the shape and function of the P-site to increase the decoding fidelity. It…

Epigenetics and DNA MethylationEnzyme Structure and FunctionRNA modifications and cancer

Dynamic converse magnetoelectric effect in ferromagnetic nanostructures with electric-field-dependent interfacial anisotropy

G Viaud、N. A. Pertsev2014-08-27Physical Review B

Magnetization oscillations excited by microwave voltages in ferromagnetic nanostructures having electric-field-dependent interfacial anisotropy are described theoretically. By calculating frequency dependencies of complex susceptibilities we show that this dynamic magnetoelectric effect acquires anomalous characterist…

Magnetic properties of thin filmsMultiferroics and related materialsAdvanced Condensed Matter Physics

Efficient Ruthenium Sensitizer with a Terpyridine Ligand Having a Hexylthiophene Unit for Dye‐Sensitized Solar Cells: Effects of the Substituent Position on the Solar Cell Performance

Hironobu Ozawa、Takahiro KURODA、Shohei Harada 等 4 位作者2014-08-27European Journal of Inorganic Chemistry

Abstract A novel ruthenium sensitizer with a terpyridine ligand having a hexylthiophene unit at the 4‐position (TUS‐38) has been synthesized to investigate the effects of the substituent position on the photo‐ and electrochemical properties and on solar cell performance. The dye‐sensitized solar cell (DSC) with TUS‐38…

TiO2 Photocatalysis and Solar CellsAdvanced Photocatalysis TechniquesAdvanced Nanomaterials in Catalysis

Combined T2‐preparation and two‐dimensional pencil‐beam inner volume selection

Andrew J. Coristine、Ruud B. van Heeswijk、Matthias Stuber2014-08-27Magnetic Resonance in Medicine

PURPOSE: To improve coronary magnetic resonance angiography (MRA) by combining a two-dimensional (2D) spatially selective radiofrequency (RF) pulse with a T2 -preparation module ("2D-T2 -Prep"). METHODS: An adiabatic T2 -Prep was modified so that the first and last pulses were of differing spatial selectivity. The fir…

Cardiac Imaging and DiagnosticsAdvanced MRI Techniques and ApplicationsLanthanide and Transition Metal Complexes

Bundling of GaAs Nanowires: A Case of Adhesion-Induced Self-Assembly of Nanowires

Stefania Carapezzi、Giacomo Priante、Vincenzo Grillo 等 6 位作者2014-08-27ACS Nano

The origin of deflections of semiconductor nanowires (NWs) induced by an electron beam in scanning electron microscopy has been subject to different interpretations. Similarly, the subsequent clumping together of NWs into bundles is frequently observed, but no interpretation has yet been advanced. Here we present resu…

Quantum Dots Synthesis And PropertiesNanowire Synthesis and ApplicationsAdhesion, Friction, and Surface Interactions

AXIS: An instrument for imaging Compton radiographs using the Advanced Radiography Capability on the NIF

G. N. Hall、N. Izumi、R. Tommasini 等 13 位作者2014-08-27Review of Scientific Instruments

Compton radiography is an important diagnostic for Inertial Confinement Fusion (ICF), as it provides a means to measure the density and asymmetries of the DT fuel in an ICF capsule near the time of peak compression. The AXIS instrument (ARC (Advanced Radiography Capability) X-ray Imaging System) is a gated detector in…

Laser-Plasma Interactions and DiagnosticsFusion materials and technologiesNuclear Physics and Applications

Preparation of hierarchical SAPO-11 molecular sieve and its application for n-dodecane isomerization

Hao Song、Zhen Liu、Wei Xing 等 8 位作者2014-08-27Applied Petrochemical Research

The isomerization conversion of long chain paraffins for high quality lube oil production plays an important role in the petrochemical industry. The conventional isomerization catalyst, SAPO-11 molecular sieve, exhibits disadvantages for large molecule transfer and multi-branched isomer conversion. To overcome the dif…

Zeolite Catalysis and SynthesisMesoporous Materials and CatalysisCatalysis and Hydrodesulfurization Studies

Cake properties of nanocolloid evaluated by variable pressure filtration associated with reduction in cake surface area

Eiji Iritani、N. KATAGIRI、Ryota Nakajima 等 5 位作者2014-08-27AIChE Journal

A potential method has been developed for evaluating simultaneously both the average specific resistance and average porosity of the filter cake formed in unstirred dead‐end ultrafiltration of nanocolloids such as bovine serum albumin solution and silica sol. The method consists of variable pressure filtration followe…

Membrane Separation TechnologiesElectrospun Nanofibers in Biomedical ApplicationsAerosol Filtration and Electrostatic Precipitation

Linking Electrostatic Effects and Protein Motions in Enzymatic Catalysis. A Theoretical Analysis of Catechol O-Methyltransferase

Rafael García-Meseguer、Kirill Zinovjev、Maite Roca 等 5 位作者2014-08-27The Journal of Physical Chemistry B

The role of protein motions in enzymatic catalysis is the subject of a hot scientific debate. We here propose the use of an explicit solvent coordinate to analyze the impact of environmental motions during the reaction process. The example analyzed here is the reaction catalyzed by catechol O-methyltransferase, a meth…

Protein Structure and DynamicsEnzyme Structure and FunctionBiochemical and Molecular Research

Sticky surface: sphere–sphere adhesion dynamics

Sarthok Sircar、John G. Younger、David M. Bortz2014-08-27Journal of Biological Dynamics

We present a multi-scale model to study the attachment of spherical particles with a rigid core, coated with binding ligands and suspended in the surrounding, quiescent fluid medium. This class of fluid-immersed adhesion is widespread in many natural and engineering settings, particularly in microbial surface adhesion…

Surface Modification and SuperhydrophobicityForce Microscopy Techniques and ApplicationsAdhesion, Friction, and Surface Interactions

Effect of Metal Electrodes on Surface Acoustic Wave Properties in Bulk Z-Cut GaN Crystal

W. Soluch、E. Brzozowski2014-08-27IEEE Transactions on Electron Devices

The effect of metal electrodes on surface acoustic wave (SAW) properties in bulk semi-insulating Z-cut GaN crystal was measured for the first time. A SAW synchronous two-port resonator was used for these measurements. Such SAW parameters as velocity, electromechanical coupling coefficient, and reflection coefficient o…

ZnO doping and propertiesGaN-based semiconductor devices and materialsAcoustic Wave Resonator Technologies

Cell-Penetrating Peptide-Mediated Topical Delivery of Biomacromolecular Drugs

Jiao Tan、Heesun Cheong、Yoon Shin Park 等 7 位作者2014-08-27Current Pharmaceutical Biotechnology

Biomacromolecules play an important role in the treatment of many diseases, but their topical application has been limited by their poor cell membrane permeability. Cell-penetrating peptides (CPPs) have been investigated over the past few decades as a potential strategy to overcome this challenge. CPPs can effectively…

Advanced biosensing and bioanalysis techniquesRNA Interference and Gene DeliverySilk-based biomaterials and applications

Interaction of BN ‐ Z r O 2 ‐ S i C Ceramics with Inclusions in Si‐killed Steel

Abhishek Kumar、Vivek Thapliyal、Jeffrey D. Smith2014-08-27International Journal of Applied Ceramic Technology

Boron nitride ( BN )‐based ceramics are often used as containment refractory in thin‐strip steel production. The interaction of this material ( BN ‐ Z r O 2 ‐ S i C :‐ MYCROSINT ® SO 43) was studied using a steel‐inclusion system in a laboratory setup. Isothermal interaction tests were performed to evaluate the intera…

Concrete and Cement Materials ResearchAdvanced ceramic materials synthesisMetallurgical Processes and Thermodynamics

Synthesis, characterization, and growth simulations of Cu–Pt bimetallic nanoclusters

Subarna Khanal、Ana Spitale、Nabraj Bhattarai 等 8 位作者2014-08-27Beilstein Journal of Nanotechnology

Highly monodispersed Cu-Pt bimetallic nanoclusters were synthesized by a facile synthesis approach. Analysis of transmission electron microscopy (TEM) and spherical aberration (C s)-corrected scanning transmission electron microscopy (STEM) images shows that the average diameter of the Cu-Pt nanoclusters is 3.0 ± 1.0…

Catalytic Processes in Materials ScienceNanocluster Synthesis and Applicationsnanoparticles nucleation surface interactions

Electric Impedance of Piezoelectric Ceramics under Acoustic Loads

Francisco J. Arnold、Marcos S. Gonçalves、Leonardo Lorenzo Bravo Roger 等 4 位作者2014-08-27ECTI Transactions on Electrical Engineering Electronics and Communications

The electric impedance of piezoelectric ceramics is influenced by variations in the acoustic load. This situation is very common for ultrasonic applications in medicine where the irradiated media can present different interfaces and impedances to the propagating acoustic energy. In this work we analyzed the behavior o…

Ferroelectric and Piezoelectric MaterialsUltrasonics and Acoustic Wave PropagationAcoustic Wave Resonator Technologies

Generalized Eilenberger theory for Majorana zero-mode-carrying disordered p -wave superconductors

Hoi-Yin Hui、Jay D. Sau、S. Das Sarma2014-08-27Physical Review B

Disorder is known to suppress the gap of a topological superconducting state that would support non-Abelian Majorana zero modes. In this paper, we study using the self-consistent Born approximation the robustness of the Majorana modes to disorder within a suitably extended Eilenberger theory, in which the spatial depe…

Graphene research and applicationsTopological Materials and PhenomenaAdvanced Condensed Matter Physics

Highly Selective Colorimetric Detection of Copper Ions Using Cysteamine Functionalized Gold Nanoparticles

Le Li、Zhiqin Yuan、Xinkai Peng 等 6 位作者2014-08-27Journal of the Chinese Chemical Society

Abstract In this study, we designed a system of integrating gold nanoparticles and cysteamine to detect Cu2+ based on a colorimetric strategy. The quantified limit of detection towards Cu2+ is 0.4 µM, which is ∼50 times lower than the maximum contamination level (∼20 µM) in drinking water permitted by US environmental…

Advanced biosensing and bioanalysis techniquesMolecular Sensors and Ion DetectionAdvanced Nanomaterials in Catalysis