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Assessment of Low Cycle Fatigue Life of Steam Turbine Rotor Based on a Thermodynamic Approach

Yongjian Sun、Li‐Sheng Hu2012-04-12Journal of Engineering for Gas Turbines and Power

A new nonlinear model is proposed to assess the low cycle fatigue life of a 300 MW steam turbine rotor. Manson-Coffin equation and cyclic stress-strain relationship are employed to eliminate the unmeasured parameters, so all the parameters in model are measurable. Through comparison with that from the linear accumulat…

Fatigue and fracture mechanicsHigh Temperature Alloys and CreepMaterial Properties and Failure Mechanisms

Ethanol Recovery from Water Using Silicalite‐1 Membrane: An Operando Infrared Spectroscopic Study

Xiaoqin Zou、Philippe Bazin、Feng Zhang 等 6 位作者2012-04-12ChemPlusChem

Abstract The adsorption, separation, and diffusion properties of intergrown silicalite‐1 membrane on a pre‐seeded porous stainless‐steel‐net support in ethanol/water mixtures are evaluated. The permeation of ethanol and water as vapors and liquids on the silicalite‐1 membrane is investigated. Operando IR spectroscopy…

Supercapacitor Materials and FabricationCatalysis and Hydrodesulfurization StudiesMembrane Separation and Gas Transport

Development of a biodegradable bone cement for craniofacial applications

Allan M. Henslee、Dong‐Ho Gwak、Antonios G. Mikos 等 4 位作者2012-04-12Journal of Biomedical Materials Research Part A

This study investigated the formulation of a two-component biodegradable bone cement comprising the unsaturated linear polyester macromer poly(propylene fumarate) (PPF) and crosslinked PPF microparticles for use in craniofacial bone repair applications. A full factorial design was employed to evaluate the effects of f…

Bone Tissue Engineering MaterialsOrthopaedic implants and arthroplastybiodegradable polymer synthesis and properties

Mu Insertions Are Repaired by the Double-Strand Break Repair Pathway of Escherichia coli

Sooin Jang、Steven J. Sandler、Rasika M. Harshey2012-04-12PLoS Genetics

Mu is both a transposable element and a temperate bacteriophage. During lytic growth, it amplifies its genome by replicative transposition. During infection, it integrates into the Escherichia coli chromosome through a mechanism not requiring extensive DNA replication. In the latter pathway, the transposition intermed…

Bacterial Genetics and BiotechnologyDNA Repair MechanismsEnzyme Structure and Function

Structural defects in trifluoroacetate derived YBa2Cu3O7thin films

Jaume Gàzquez、Mariona Coll、N Romà 等 6 位作者2012-04-12Superconductor Science and Technology

We present an accurate description of the structural defects occurring within YBa2Cu3O7 (YBCO) films grown by chemical solution deposition (CSD) based on metal trifluoroacetates (TFA). Transmission electron microscopy (TEM) is the essential tool to identify and evaluate the microstructural defects that might act as na…

Physics of Superconductivity and MagnetismZnO doping and propertiesSuperconductivity in MgB2 and Alloys

Solid‐state 11B and 13C NMR, IR, and X‐ray crystallographic characterization of selected arylboronic acids and their catechol cyclic esters

Se‐Woung Oh、Joseph W. E. Weiss、Phillip A. Kerneghan 等 6 位作者2012-04-12Magnetic Resonance in Chemistry

Nine arylboronic acids, seven arylboronic catechol cyclic esters, and two trimeric arylboronic anhydrides (boroxines) are investigated using (11)B solid-state NMR spectroscopy at three different magnetic field strengths (9.4, 11.7, and 21.1 T). Through the analysis of spectra of static and magic-angle spinning samples…

Advanced NMR Techniques and ApplicationsSolid-state spectroscopy and crystallographyMuon and positron interactions and applications

Comparison of Nuclear Spin Relaxation of H2O@C60 and H2@C60 and Their Nitroxide Derivatives

Yongjun Li、Judy Chen、Xuegong Lei 等 7 位作者2012-04-12The Journal of Physical Chemistry Letters

The successful synthesis of H2O@C60 makes possible the study of magnetic interactions of an isolated water molecule in a geometrically well-defined hydrophobic environment. Comparisons are made between the T1 values of H2O@C60 and the previously studied H2@C60 and their nitroxide derivatives. The value of T1 is approx…

Advanced Chemical Physics StudiesGraphene research and applicationsFullerene Chemistry and Applications

Uniaxial linear resistivity of superconducting La 1.905 Ba 0.095 CuO 4 induced by an external magnetic field

Jinsheng Wen、Qing Jie、Qiang Li 等 12 位作者2012-04-12Physical Review B

We present an experimental study of the anisotropic resistivity of superconducting La${}_{2\ensuremath{-}x}$Ba${}_{x}$CuO${}_{4}$ with $x=0.095$ and transition temperature ${T}_{c}=32$ K. In a magnetic field perpendicular to the CuO${}_{2}$ layers ${H}_{\ensuremath{\perp}}$, we observe that the resistivity perpendicul…

Physics of Superconductivity and MagnetismMagnetic and transport properties of perovskites and related materialsAdvanced Condensed Matter Physics

Laser welding of Mg alloy MgAl3Zn1 (AZ31) to Al alloy AlMg3 (AA5754) using ZnAl filler material

Florian Scherm、J Bezold、Uwe Glatzel2012-04-12Science and Technology of Welding & Joining

Welding of magnesium with aluminium alloys is challenging due to the formation of brittle intermetallic phases. In this study laser welding of an Mg alloy with an Al alloy, using a Nd∶YAG laser with a two focus optics and ZnAl filler material, was investigated. Mechanical tests, as well as microstructure investigation…

Magnesium Alloys: Properties and ApplicationsAluminum Alloys Composites PropertiesAdvanced Welding Techniques Analysis

GUIDING PROBABILISTIC SEARCH OF THE PROTEIN CONFORMATIONAL SPACE WITH STRUCTURAL PROFILES

Brian Olson、Kevin Molloy、S. FARID HENDI 等 4 位作者2012-04-12Journal of Bioinformatics and Computational Biology

The roughness of the protein energy surface poses a significant challenge to search algorithms that seek to obtain a structural characterization of the native state. Recent research seeks to bias search toward near-native conformations through one-dimensional structural profiles of the protein native state. Here we in…

Protein Structure and DynamicsSoftware Engineering ResearchMachine Learning in Materials Science

Reactivity of Surfaces Determined by Local Electrochemical Triggering: A Bromo‐Terminated Self‐Assembled Monolayer

Sandra Nunige、Renaud Cornut、Hassan Hazimeh 等 7 位作者2012-04-12Angewandte Chemie International Edition

Magic ink: The chemical reactivity of a bromo-terminated self-assembled monolayer immobilized on an insulating substrate is quantified from the time evolution of patterns formed during the local reduction of the SAM (see picture; bpy=2,2′-bipyridine). The potential of this lithographic strategy to determine the reacti…

Conducting polymers and applicationsMolecular Junctions and NanostructuresElectrochemical Analysis and Applications

Relating composition, structural order, entropy and transport in multi-component molten salts

B. Shadrack Jabes、Charusita Chakravarty2012-04-12The Journal of Chemical Physics

Molecular dynamics simulations of the LiF-BeF(2) molten salt mixture are used to establish relationships between composition, structural order, entropy, and transport properties of multi-component ionic liquids. A sharp rise in tetrahedral order associated with formation of the fluoroberyllate network occurs for compo…

Material Dynamics and PropertiesRecycling and utilization of industrial and municipal waste in materials productionMolten salt chemistry and electrochemical processes

Study of top sheet thinning during friction stir lap welding of AZ31 magnesium alloy

Wei Yuan、Blair E. Carlson、Rajeev Verma 等 4 位作者2012-04-12Science and Technology of Welding & Joining

Friction stir lap welding was applied to AZ31 magnesium alloy sheets to investigate the effect of tool designs and welding variables on top sheet thinning. Three tools with different shoulder designs were used. Sheet thinning aroused by the hooking or cold lap feature was quantified, and the lap shear fracture load of…

Magnesium Alloys: Properties and ApplicationsAluminum Alloys Composites PropertiesAdvanced Welding Techniques Analysis

Analyses of the Large Subunit Histidine-Rich Motif Expose an Alternative Proton Transfer Pathway in [NiFe] Hydrogenases

Emma Szőri-Dorogházi、Gergely Maróti、Milán Szöri 等 6 位作者2012-04-12PLoS ONE

A highly conserved histidine-rich region with unknown function was recognized in the large subunit of [NiFe] hydrogenases. The HxHxxHxxHxH sequence occurs in most membrane-bound hydrogenases, but only two of these histidines are present in the cytoplasmic ones. Site-directed mutagenesis of the His-rich region of the T…

Electrocatalysts for Energy ConversionHydrogen Storage and MaterialsMetalloenzymes and iron-sulfur proteins

Emergency response technical work at Fukushima Dai-ichi nuclear power plant: occupational health challenges posed by the nuclear disaster

Koji Wada、Toru Yoshikawa、Takeshi Hayashi 等 4 位作者2012-04-12Occupational and Environmental Medicine

Fukushima Dai-ichi nuclear power plant (NPP) was heavily damaged by the tsunami that resulted from the 9.0-magnitude earthquake which occurred off the coast of eastern Japan on 11 March 2011.1 The loss of all alternating current (AC) electrical power, even from emergency generators, disabled cooling functions and the…

Radioactive contamination and transferGraphite, nuclear technology, radiation studiesNuclear and radioactivity studies

Cytotoxicity and cell imaging potentials of submicron color‐tunable yttria particles

Timur Sh. Atabaev、Jong-Ho Lee、Dong‐Wook Han 等 5 位作者2012-04-12Journal of Biomedical Materials Research Part A

Increased demand of environment protection encouraged scientists to design products and processes that minimize the use and generation of hazardous substances. This work presents comprehensive result of large-scale fabrication and investigation of red-to-green tunable submicron spherical yttria particles codoped with…

Luminescence Properties of Advanced MaterialsQuantum Dots Synthesis And PropertiesNanoplatforms for cancer theranostics

Application of Heterogeneous Catalysis in Small-Scale Biomass Combustion Systems

René Bindig、Saad Ihsan Butt、Ingo Hartmann 等 5 位作者2012-04-12Catalysts

Combustion of solid biomass fuels for heat generation is an important renewable energy resource. The major part among biomass combustion applications is being played by small-scale systems like wood log stoves and small wood pellet burners, which account for 75% of the overall biomass heat production. Despite an envir…

Thermochemical Biomass Conversion ProcessesAdvanced Combustion Engine TechnologiesCatalytic Processes in Materials Science

Density Functional Theory Study on the Mechanism of Calcium Sulfate Reductive Decomposition by Carbon Monoxide

Xuemei Zhang、Xingfu Song、Ze Sun 等 5 位作者2012-04-12Industrial & Engineering Chemistry Research

The reductive decomposition of calcium sulfate (CaSO 4 ) to calcium sulfide (CaS) was one of the most important methods for anhydrite resource utilization. When CaSO 4 was decomposed reductively by carbon monoxide (CO), usually there were CaS and/or calcium oxide (CaO) in the decomposition products of CaSO 4 depending…

Metal Extraction and BioleachingChemical Looping and Thermochemical ProcessesThermal and Kinetic Analysis

Quantitative Characterization of Breathing upon Adsorption for a Series of Amino-Functionalized MIL-53

Marc Pera‐Titus、Tristan Lescouet、Sónia Aguado 等 4 位作者2012-04-12The Journal of Physical Chemistry C

This work presents the synthesis of MIL-53(Al) metal–organic frameworks with different terephthalate/2-aminoterephthalate linker ratios incorporated into the framework during hydrothermal synthesis. In all cases, the materials show prominent S-shaped isotherms upon CO 2 adsorption that can be attributed to sorbate-ind…

Metal-Organic Frameworks: Synthesis and ApplicationsGas Sensing Nanomaterials and SensorsCovalent Organic Framework Applications

Improved Treatment of Surrounding Effects: UV/vis Absorption Properties of a Solvated Ru(II) Complex

Agisilaos Chantzis、Thibaut Véry、Antonio Monari 等 4 位作者2012-04-12Journal of Chemical Theory and Computation

The UV/vis and circular-dichroism spectra of a bis-bipyridinyl ruthenium complex are computed at the density functional theory level and the time dependent density functional level of theory. The effects of the solvent, here water, have been taken into account, by polarizable continuum methods and by a hybrid quantum-…

Metal complexes synthesis and propertiesPorphyrin and Phthalocyanine ChemistryPhotochemistry and Electron Transfer Studies