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Shear jamming in granular experiments without basal friction

Hu Zheng、Joshua A. Dijksman、Robert Behringer2014-07-31Europhysics Letters (EPL)

Jammed states of frictional granular systems can be induced by shear strain at densities below the isostatic jamming density . It remains unclear, however, how much friction affects this so-called shear jamming. Friction appears in two ways in this type of experiment: friction between particles, and friction between p…

High-pressure geophysics and materialsMaterial Dynamics and PropertiesGranular flow and fluidized beds

Outcomes following Sonothrombolysis in Severe Acute Ischemic Stroke: Subgroup Analysis of the CLOTBUST Trial

Kristian Barlinn、Georgios Tsivgoulis、Andrew D. Barreto 等 11 位作者2014-07-31International Journal of Stroke

BACKGROUND: Sonothrombolysis is safe and may increase the likelihood of early recanalization in acute ischemic stroke patients. AIMS: In preparation of a phase III clinical trial, we contrast the likelihood of achieving a sustained recanalization and functional independence in a post hoc subgroup analysis of patients…

Acute Ischemic Stroke ManagementUltrasound and Hyperthermia ApplicationsUltrasound and Cavitation Phenomena

Facile Preparation of Regioregular Poly(3-hexylthiophene) and Its Block Copolymers with π-Allylnickel Complex as External Initiator

Long-Mei Gao、Yan-Yu Hu、Zhipeng Yu 等 8 位作者2014-07-31Macromolecules

Simply prepared π-allylnickel complexes were used as external initiators for promoting the polymerization of 2-bromo-3-hexyl-5-chloromagnesiothiophene in a living/controlled chain growth manner to afford regioregular poly(3-hexylthiophene) with an allyl terminus. The nickel species on the other chain end can initiate…

Organic Electronics and PhotovoltaicsLuminescence and Fluorescent MaterialsSynthesis and Properties of Aromatic Compounds

Molecular Simulation of Ag Nanoparticle Nucleation from Solution: Redox-Reactions Direct the Evolution of Shape and Structure

Theodor Milek、Dirk Zahn2014-07-31Nano Letters

The association of Ag(+) ions and the early stage of Ag nanoparticle nucleation are investigated from molecular dynamics simulations. Combining special techniques for tackling crystal nucleation from solution with efficient approaches to model redox-reactions, we unravel the structural evolution of forming silver nano…

Gold and Silver Nanoparticles Synthesis and ApplicationsCoagulation and Flocculation Studiesnanoparticles nucleation surface interactions

Three-Phase Inclusions in Emerald and Their Impact on Origin Determination

Sudarat Saeseau2014-07-31Gems & Gemology

Until now, the observation of three-phase inclusions in emeralds has been considered a potential indicator of Colombian origin. Nevertheless, emeralds from Afghanistan (Panjshir Valley), China (Davdar), and Zambia (Kafubu and a new deposit at Musakashi) may contain three-phase inclusions resembling those often found i…

Crystal Structures and PropertiesIsotope Analysis in EcologyMineralogy and Gemology Studies

Carbon Nanomaterial-Based Composites in Wastewater Purification

Yongshun Huang、Xiaoping Chen2014-07-31Nano LIFE

New techniques and materials are called for wastewater treatment due to the shortage of worldwide fresh water and the increasing water demand. As a simple and efficient method, adsorption technique has been extensively applied to remove organic and inorganic pollutants from contaminated water. The application of carbo…

Graphene research and applicationsNanomaterials for catalytic reactionsGraphene and Nanomaterials Applications

In situ generated thrombin in the protein corona of zeolites: Relevance of the functional proteins to its biological impact

Yunlong Li、Xiaofeng Liao、Xiaoxi Zhang 等 11 位作者2014-07-31Nano Research

Adsorption of plasma proteins to nanomaterial surfaces has a great influence on their bio-functionality. However, there is limited understanding of the relationship between the functional proteins in the protein corona and the biological identity of the materials. Here we show that the in situ generated thrombin in th…

Polymer Surface Interaction StudiesBlood properties and coagulationHemostasis and retained surgical items

Aptamer‐Functionalized Multidimensional Conducting‐Polymer Nanoparticles for an Ultrasensitive and Selective Field‐Effect‐Transistor Endocrine‐Disruptor Sensors

Jun Seop Lee、Sung Gun Kim、Jaemoon Jun 等 5 位作者2014-07-31Advanced Functional Materials

An endocrine disruptor (ED) is a type of xenobiotic compound that can cause serious diseases related to the estrous cycle, as well as various types of cancer. At low ED concentrations, estrogen receptors may respond as they would under physiological conditions. In this work, aptamer‐functionalized multidimensional con…

Advanced biosensing and bioanalysis techniquesConducting polymers and applicationsAnalytical Chemistry and Sensors

New Concepts for Designing d10‐M(L)n Catalysts: d Regime, s Regime and Intrinsic Bite‐Angle Flexibility

Lando P. Wolters、Willem‐Jan van Zeist、F. Matthias Bickelhaupt2014-07-31Chemistry - A European Journal

Our aim is to understand the electronic and steric factors that determine the activity and selectivity of transition-metal catalysts for cross-coupling reactions. To this end, we have used the activation strain model to quantum-chemically analyze the activity of catalyst complexes d(10) -M(L)n toward methane C-H oxida…

Organometallic Complex Synthesis and CatalysisCatalytic Processes in Materials ScienceCatalytic Cross-Coupling Reactions

Miktoarm Star Copolymer Capsules Bearing pH-Responsive Nanochannels

Heng Hu、Guojun Liu2014-07-31Macromolecules

Despite the diversity of nanostructures that have been created from block copolymers over the past two decades, the challenging fabrication of polymer nanocapsules bearing regularly sized nanochannels has not been possible until now. In this study, a pseudo miktoarm copolymer μ-(PtBA)(PCEMA)(PEO) 1.14 was prepared. Th…

Advanced Polymer Synthesis and CharacterizationBlock Copolymer Self-AssemblyNanopore and Nanochannel Transport Studies

Subeutectic Growth of Single-Crystal Silicon Nanowires Grown on and Wrapped with Graphene Nanosheets: High-Performance Anode Material for Lithium-Ion Battery

Fathy M. Hassan、Abdel Rahman Elsayed、Victor Chabot 等 6 位作者2014-07-31ACS Applied Materials & Interfaces

A novel one-pot synthesis for the subeutectic growth of (111) oriented Si nanowires on an in situ formed nickel nanoparticle catalyst prepared from an inexpensive nickel nitrate precursor is developed. Additionally, anchoring the nickel nanoparticles to a simultaneously reduced graphene oxide support created synergy b…

Advancements in Battery MaterialsGraphene research and applicationsMXene and MAX Phase Materials

Electron beam irradiation enhances the digestibility and fermentation yield of water-soaked lignocellulosic biomass

Jin Seop Bak2014-07-31Biotechnology Reports

In order to overcome the limitation of commercial electron beam irradiation (EBI), lignocellulosic rice straw (RS) was pretreated using water soaking-based electron beam irradiation (WEBI). This environment-friendly pretreatment, without the formation (or release) of inhibitory compounds (especially hydroxymethylfurfu…

Biofuel production and bioconversionAdvanced Cellulose Research StudiesCatalysis for Biomass Conversion

Long afterglow Sr 4 Al 14 O 25 :Eu,Dy phosphors as both scattering and down converting layer for CdS quantum dot-sensitized solar cells

Hengchao Sun、Likun Pan、Guang Zhu 等 6 位作者2014-07-31Dalton Transactions

Long afterglow Sr4Al14O25:Eu,Dy phosphors were introduced into the TiO2 photoanode of CdS quantum dot-sensitized solar cells (QDSSCs) as both a scattering and down converting layer, and the photovoltaic performances of the cells were investigated. The results show that the cell with Sr4Al14O25:Eu,Dy achieves a power c…

TiO2 Photocatalysis and Solar CellsAdvanced Photocatalysis TechniquesLuminescence Properties of Advanced Materials

Synthesis and cytocompatibility of collagen/hydroxyapatite nanocomposite scaffold for bone tissue engineering

Li Chen、Jingxiao Hu、Jiabing Ran 等 5 位作者2014-07-31Polymer Composites

Collagen/hydroxyapatite nanocomposite scaffolds were prepared by in situ precipitation and freeze‐drying approach. The synthesized collagen/hydroxyapatite nanocomposites were characterized using various modalities. It was revealed that the inorganic phase in the nanocomposite was carbonate‐substituted hydroxyapatite w…

Bone Tissue Engineering Materialsbiodegradable polymer synthesis and propertiesCollagen: Extraction and Characterization

All-diamond optical assemblies for a beam-multiplexing X-ray monochromator at the Linac Coherent Light Source

Stanislav Stoupin、Sergey Terentyev、В. Д. Бланк 等 19 位作者2014-07-31Journal of Applied Crystallography

A double-crystal diamond (111) monochromator recently implemented at the Linac Coherent Light Source (LCLS) enables splitting of the primary X-ray beam into a pink (transmitted) and a monochromatic (reflected) branch. The first monochromator crystal, with a thickness of ∼100 µm, provides sufficient X-ray transmittance…

Laser-Plasma Interactions and DiagnosticsDiamond and Carbon-based Materials ResearchAdvanced X-ray Imaging Techniques

Magnetic circuit model and finite‐element analysis of a modular switched reluctance machine with E‐core stators and multi‐layer common rotors

Wen Ding、Zhonggang Yin、Ling Liu 等 6 位作者2014-07-31IET Electric Power Applications

This study presents a novel switched reluctance machine (SRM) with modular E‐core stators and multi‐layer common rotors for high reliability applications. The stator is composed of six independent modular E‐cores with the windings wound around the yoke of the E‐cores. The rotor consists of three magnetically independe…

Electric Motor Design and AnalysisMagnetic Properties and ApplicationsMagnetic Bearings and Levitation Dynamics

Spectroscopic Capture and Reactivity of a Low‐Spin Cobalt(IV)‐Oxo Complex Stabilized by Binding Redox‐Inactive Metal Ions

Seungwoo Hong、Florian Felix Pfaff、Eun‐Ji Kwon 等 8 位作者2014-07-31Angewandte Chemie

Abstract High‐valent cobalt‐oxo intermediates are proposed as reactive intermediates in a number of cobalt‐complex‐mediated oxidation reactions. Herein we report the spectroscopic capture of low‐spin (S=1/2) CoIV‐oxo species in the presence of redox‐inactive metal ions, such as Sc3+, Ce3+, Y3+, and Zn2+, and the inves…

Metal complexes synthesis and propertiesPorphyrin and Phthalocyanine ChemistryMetal-Catalyzed Oxygenation Mechanisms

Modeling Acid Oil Component Interactions with Carbonate Reservoirs: A First-Principles View on Low Salinity Recovery Mechanisms

Verónica M. Sánchez、Caetano R. Miranda2014-07-31The Journal of Physical Chemistry C

Enhanced oil recovery by low salinity water (LSW) injection in carbonate reservoirs constitutes one of the main interests for petroleum industry. A molecular mechanism involving acid oil components and the replacement of surface Ca atom by Mg atom has been proposed. To determine the thermodynamic feasibility of this m…

Hydrocarbon exploration and reservoir analysisEnhanced Oil Recovery TechniquesCalcium Carbonate Crystallization and Inhibition

Anion−π and Halide–Halide Nonbonding Interactions in a New Ionic Liquid Based on Imidazolium Cation with Three-Dimensional Magnetic Ordering in the Solid State

Abel García‐Saiz、Imanol de Pedro、Pedro Migowski 等 14 位作者2014-07-31Inorganic Chemistry

We present the first magnetic phase of an ionic liquid with anion-π interactions, which displays a three-dimensional (3D) magnetic ordering below the Néel temperature, TN = 7.7 K. In this material, called Dimim[FeBr4], an exhaustive and systematic study involving structural and physical characterization (synchrotron X…

Ionic liquids properties and applicationsAdvanced Condensed Matter PhysicsOrganic and Molecular Conductors Research

Soybean peroxidase for industrial wastewater treatment: a mini review

Aaron Steevensz、Laura G. Cordova Villegas、Wei Feng 等 6 位作者2014-07-31Journal of Environmental Engineering and Science

The potential of oxidoreductases, such as laccases and peroxidases, to remove organic pollutants from industrial wastewater and process water is addressed in this short review, with an emphasis on the peroxidase work completed or in progress in the authors’ laboratory. The major drawback to this treatment is the cost…

Advanced oxidation water treatmentEnzyme-mediated dye degradationCarbon and Quantum Dots Applications