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Pre‐synaptic dopaminergic compensation after moderate nigrostriatal damage in non‐human primates

Xiomara A. Perez、Neeraja Parameswaran、Luping Z. Huang 等 5 位作者2008-02-01Journal of Neurochemistry

Despite a dramatic loss of nigrostriatal dopaminergic neurons in Parkinson's disease, clinical symptoms only arise with 70-80% reduction of striatal dopamine. The mechanisms responsible for this functional compensation are currently under debate. Although initial studies showed an enhanced pre-synaptic dopaminergic fu…

Parkinson's Disease Mechanisms and TreatmentsConducting polymers and applicationsNeurological disorders and treatments

Controllable Formation of Ionic Liquid Micro- and Nanoparticles via a Melt–Emulsion–Quench Approach

Aaron Tesfai、Bilal El‐Zahab、David K. Bwambok 等 7 位作者2008-02-01Nano Letters

We present a facile, scalable, and general method for the size-variable generation of monodispersed, near-spherical solid-state (frozen) ionic liquid nanoparticles based on a novel melt-emulsion-quench approach. Simple manipulation of the internal templating droplets within oil-in-water (o/w) microemulsions also permi…

Ionic liquids properties and applicationsSurfactants and Colloidal SystemsPickering emulsions and particle stabilization

Numerical modelling of CO2-water-basalt interaction

Alexander Gysi、Andri Stefánsson2008-02-01Mineralogical Magazine

Abstract The effects of CO2on water-basaltic glass interaction have been simulated at 25ºC. The calculations indicate that addition of CO2(2—30 bar) to water significantly changes the reaction path. Initially, the pH is buffered between 4 and 6 by CO2ionization, with dissolution of basaltic glass and the formation of…

Geological and Geochemical AnalysisCO2 Sequestration and Geologic InteractionsClay minerals and soil interactions

Characterization of Polymer‐Coated RDX and HMX Particles

Elizabeth da Costa Mattos、Enézio Donizetti Moreira、Milton Faria Diniz 等 7 位作者2008-02-01Propellants Explosives Pyrotechnics

Abstract Fourier transform‐infrared spectroscopy (FT‐IR) in transmission and photoacoustic detection (PAS) techniques have been used for the characterization of polymeric coating of cyclotrimethylenetrinitramine (RDX) using a fluoroelastomer (Viton®). Although the bands of the polymer were indicated by two different t…

Energetic Materials and CombustionThermal and Kinetic AnalysisChemical Thermodynamics and Molecular Structure

High-Temperature Dehydrogenation of Brønsted Acid Sites in Zeolites

M. J. Nash、Anne Marie Shough、Dustin W. Fickel 等 5 位作者2008-02-01Journal of the American Chemical Society

We present evidence for the dehydrogenation of zeolite Brønsted acid sites at temperatures above 500 °C forming hydrogen gas and a [AlO 4 ] 0 site that could participate in one-electron oxidations or react further to form extraframework aluminum.

Catalytic Processes in Materials ScienceZeolite Catalysis and SynthesisCatalysis and Oxidation Reactions

Energy harvesting based on FE-FE transition in ferroelectric single crystals

Daniel Guyomar、Sébastien Pruvost、Gaël Sebald2008-02-01IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control

The pyroelectric properties of Pb(Zn(1/3)Nb(2/3))(0955)Ti(0.045)O(3) single crystals versus an electric field have been studied for energy harvesting in this paper. Two thermodynamic cycles (Stirling and Ericsson) were used for this purpose. By applying an electric field, a FE-FE transition was induced, abruptly incre…

Ferroelectric and Piezoelectric MaterialsAcoustic Wave Resonator TechnologiesInnovative Energy Harvesting Technologies

Lubrication Properties of Protein Aggregate Dispersions in a Soft Contact

Agnieszka Chojnicka、Saskia de Jong、Cornelus G. de Kruif 等 4 位作者2008-02-01Journal of Agricultural and Food Chemistry

The lubrication, rheological, and molecular properties of two different protein aggregate dispersions were compared: globular aggregates of whey protein isolate (WPI) and fibrillar aggregates of ovalbumin from egg white. These dispersions are models for the lubricating fluid that is present between the tongue and the…

Proteins in Food SystemsTextile materials and evaluationsAdhesion, Friction, and Surface Interactions

Optimization of the magnetic noise and sensitivity of giant magnetoimpedance sensors

L. G. C. Melo、David Ménard、A. Yelon 等 6 位作者2008-02-01Journal of Applied Physics

The performance of magnetic field sensors based upon the giant magnetoimpedance (GMI) effect in soft magnetic wires is investigated in the MHz frequency range. The performance of the sensor is based on its sensitivity, voltage noise level and (voltage) noise-to-sensitivity ratio, or intrinsic magnetic noise level. Opt…

Magnetic properties of thin filmsMetallic Glasses and Amorphous AlloysMagnetic Properties and Applications

Density and thermal expansion of liquid binary Al–Ag and Al–Cu alloys

Jürgen Brillo、I. Egry、Jenny Westphal2008-02-01International Journal of Materials Research (formerly Zeitschrift fuer Metallkunde)

Abstract Densities and thermal expansion coefficients of liquid Al–Ag and Al–Cu alloys were measured using the technique of electromagnetic levitation. This technique involves producing shadow images of the sample from which the volume is calculated by an image processing algorithm. Data was obtained at temperatures a…

Solidification and crystal growth phenomenaThermodynamic and Structural Properties of Metals and AlloysMetallurgical and Alloy Processes

Thermal fluctuation effects on spin torque induced switching: Mean and variations

Xiaobin Wang、Yuankai Zheng、Haiwen Xi 等 4 位作者2008-02-01Journal of Applied Physics

Thermal fluctuation effects on mean and variation of spin torque induced magnetic element switching are analyzed. Asymptotic forms of the switching time distribution from the stochastic Landau–Lifshitz–Gilbert equation, and numerical solutions of the first and second moments of switching time from the corresponding Fo…

Magnetic properties of thin filmsQuantum and electron transport phenomenaMagnetic Properties and Applications

Transient Intermediates from Mn(salen) with Sterically Hindered Mesityl Groups: Interconversion between MnIV-Phenolate and MnIII-Phenoxyl Radicals as an Origin for Unique Reactivity

Takuya Kurahashi、Akihiro Kikuchi、Takehiko Tosha 等 6 位作者2008-02-01Inorganic Chemistry

In order to reveal structure-reactivity relationships for the high catalytic activity of the epoxidation catalyst Mn(salen), transient intermediates are investigated. Steric hindrance incorporated to the salen ligand enables highly selective generation of three related intermediates, OMnIV(salen), HO-Mn IV(salen), and…

Photosynthetic Processes and MechanismsPorphyrin and Phthalocyanine ChemistryMetal-Catalyzed Oxygenation Mechanisms

Laser-launched flyer plate and confined laser ablation for shock wave loading: Validation and applications

Dennis L. Paisley、Sheng‐Nian Luo、Scott R. Greenfield 等 4 位作者2008-02-01Review of Scientific Instruments

We present validation and some applications of two laser-driven shock wave loading techniques: laser-launched flyer plate and confined laser ablation. We characterize the flyer plate during flight and the dynamically loaded target with temporally and spatially resolved diagnostics. With transient imaging displacement…

Laser-Plasma Interactions and DiagnosticsHigh-pressure geophysics and materialsDiamond and Carbon-based Materials Research

Does porous mean soft? On the elastic behaviour and structural evolution of zeolites under pressure

G. Diego Gatta2008-02-01Zeitschrift für Kristallographie - Crystalline Materials

This is a comparative study on lattice compressibility, pressure (P)-induced structural deformation mechanisms and influence of the framework and extra-framework content on the elastic behaviour of zeolites, based on previously published data obtained by in situ HP-single crystal and powder diffraction experiments. Th…

Zeolite Catalysis and SynthesisHigh-pressure geophysics and materialsCrystal Structures and Properties

The domestic induction heating appliance: An overview of recent research

J. Acero、José M. Burdío、L.A. Barragán 等 10 位作者2008-02-01Conference proceedings/Conference proceedings - IEEE Applied Power Electronics Conference and Exposition

In this paper several research topics pertaining to the design and modeling of domestic induction appliances are reviewed. Each topic is summarized, stressing its most significant advances and pointing to its future tendencies. A bibliographic review showing some of the published papers during the last years is includ…

Advanced DC-DC ConvertersMagnetic Properties and ApplicationsInduction Heating and Inverter Technology

Engineered Cardiac Organoid Chambers: Toward a Functional Biological Model Ventricle

Eun Jung Lee、Do Eun Kim、Evren U. Azeloglu 等 4 位作者2008-02-01Tissue Engineering Part A

A growing area in the field of tissue engineering is the development of tissue equivalents as model systems for in vitro experimentation and high-throughput screening applications. Although a variety of strategies have been developed to enhance the structure and function of engineered cardiac tissues, an inherent limi…

Electrospun Nanofibers in Biomedical Applications3D Printing in Biomedical ResearchTissue Engineering and Regenerative Medicine

Adsorption and Reaction of Ethanol on ZnO Nanowires

Geunjae Kwak、Kijung Yong2008-02-01The Journal of Physical Chemistry C

The surface reaction of ethanol on ZnO nanowires was studied by temperature-programmed desorption (TPD). Desorption products of ethanol from ZnO nanowires were examined as function of temperature and exposure. During heating of the sample up to 900 K, ethanol, ethylene, and hydrogen molecules are desorbed as the main…

ZnO doping and propertiesCatalytic Processes in Materials ScienceGas Sensing Nanomaterials and Sensors

In situ monitoring of the biofilm formation of Pseudomonas putida on hematite using flow-cell ATR-FTIR spectroscopy to investigate the formation of inner-sphere bonds between the bacteria and the mineral

Jesús J. Ojeda、María Romero-González、Hamid M. Pouran 等 4 位作者2008-02-01Mineralogical Magazine

Abstract In situ flow-cell ATR-FTIR using a hematite-coated germanium crystal was used to investigate the chemical interactions between Pseudomonas putida and hematite in real time, when compared with cells not attached to the mineral surface. ATR-FTIR spectra of bacteria growing on hematite showed a shift in the carb…

Metal Extraction and BioleachingMinerals Flotation and Separation TechniquesClay minerals and soil interactions

Impact Damage Resistance and Tolerance of Honeycomb Core Sandwich Panels

Karthikayen Raju、B. L. Smith、John Tomblin 等 5 位作者2008-02-01Journal of Composite Materials

The damage resistance and tolerance of flat [(0/45),/core/(45/0), ] sandwich plates with honeycomb core subjected to low-velocity impacts using hemispherical steel impactors has been investigated experimentally. The effects of impactor diameter on the impact behavior, resulting impact damage states, and residual stren…

Mechanical Behavior of CompositesCellular and Composite StructuresHigh-Velocity Impact and Material Behavior

Crystallization of Insensitive HMX

H. Kröber、Ulrich Teipel2008-02-01Propellants Explosives Pyrotechnics

Abstract In this study HMX was recrystallized from different solvents by a cooling crystallization process to improve the product quality and to produce a more insensitive product. It was found that particles with the best quality were crystallized from propylenecarbonate with a nucleation initiation by dosing a small…

Polymer crystallization and propertiesEnergetic Materials and CombustionThermal and Kinetic Analysis

Performance and power optimization through data compression in Network-on-Chip architectures

Reetuparna Das、Asit Mishra、Chrysostomos Nicopoulos 等 8 位作者2008-02-01Proceedings - International Symposium on High-Performance Computer Architecture/Proceedings

The trend towards integrating multiple cores on the same die has accentuated the need for larger on-chip caches. Such large caches are constructed as a multitude of smaller cache banks interconnected through a packet-based network-on-chip (NoC) communication fabric. Thus, the NoC plays a critical role in optimizing th…

Parallel Computing and Optimization TechniquesSupercapacitor Materials and FabricationInterconnection Networks and Systems