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Electron beam interaction with a metamaterial structure

David M. French、D. Shiffler2012-07-01OpenAlex

Analytic theory and simulations in the particle-in-cell code ICEPIC are used to describe the interaction of an electron beam in a parallel plate waveguide partially loaded with a metamaterial structure. The metamaterial being considered is an effective medium representation of a split ring resonator (SRR) and isotropi…

Metamaterials and Metasurfaces ApplicationsMicrowave Engineering and WaveguidesAdvanced Antenna and Metasurface Technologies

Facile Preparation of Microporous Carbons with High Specific Capacitance from Coal Tar Pitch for Supercapacitors

Nan Zhao、Xiao Jun He、Ping Hua Ling 等 7 位作者2012-07-01Advanced materials research

Microporous carbons (MCs) for supercapacitors were prepared from coal tar pitch (CTP) with potassium hydroxide (KOH) as activating agent at different KOH/CTP mass ratio by different heating modes. The results show that the specific surface area (SBET), micropore surface area (Smic), total pore volume (Vt) and micropor…

Advancements in Battery MaterialsSupercapacitor Materials and FabricationConducting polymers and applications

Spectrometry analysis of fumes of (U0.80Pu0.20)O2 hybrid nuclear fuel samples heated to a temperature of 2000°C

M. T. Zharaspayev、Дмитрий Ким、Roza Zhumagulova2012-07-01Instruments and Experimental Techniques

The results of the spectrometry analysis of a gaseous cloud that forms over (U 0.80 Pu 0.20 )O 2 hybrid uranium-plutonium fuel samples for reactors, which were heated to a temperature of >2000°C, are described. Samples were heated using a laser facility designed for conducting out-of-pile experiments with the nuclear…

Nuclear reactor physics and engineeringNuclear Materials and PropertiesNuclear and radioactivity studies

O1‐01‐01: Cerebrospinal fluid biomarkers for Alzheimer's disease are associated with neuropathology in cortical brain biopsy

Toni T. Seppälä、Ossi Nerg、Anne M. Koivisto 等 15 位作者2012-07-01Alzheimer s & Dementia

CSF biomarkers of AD correlate with neuropathology of autopsy samples and CSF Aβ42 reflects the amyloid accumulation in PIB PET imaging. However, the relationship of CSF biomarkers and brain biopsy has not been proven before. Thus, we evaluated the connection between ventricular and lumbar CSF biomarkers and AD-relate…

Lanthanide and Transition Metal ComplexesCerebrospinal fluid and hydrocephalusIntracerebral and Subarachnoid Hemorrhage Research

General anaesthetics induce tonic inhibition and modulate the gain of neural populations : a modeling study

Axel Hutt、Thomas Voegtlin2012-07-01BMC Neuroscience

Figure 1 The population firing rate in a population of type-I neurons plotted with respect to the conductance at excitatory synapses G E. The tonic inhibition shunts the membrane at extra-synaptic inhibitory receptors in average by 0.1nS.The heterogeneity of the shunting conductances have standard deviations 0.1nS (bl…

Neuroscience and Neuropharmacology ResearchReceptor Mechanisms and SignalingPhotochromic and Fluorescence Chemistry

Study of pH-sensitive magnetization transfer imaging in hyperacute brain infarction using a clinical 1.5 Tesla scanner

Taifeng Lin、Maobin Wei、Gang Xiao 等 7 位作者2012-07-01OpenAlex

When cerebral nervous tissue lacks of blood and oxygen, neurocyte is altered in metabolism, following with intracellular acid-base disturbance. Alteration of intracellular pH value can influence the magnetization transfer ratio (MTR). So pH-sensitive magnetization transfer imaging can reflect the alteration in metabol…

Advanced MRI Techniques and ApplicationsLanthanide and Transition Metal ComplexesMRI in cancer diagnosis

Preparation and characterization of polymer blend nanocomposites

Rekha Singh、Ajaypal Indolia、M. S. Gaur2012-07-01OpenAlex

A polyurethane/Polysulfone/Multi-walled carbon nanotube blend polymer nanocomposite of thickness 25μm were prepared by solution mixing method. The microstructure of the composite was examined by scanning electron microscopy. The study on the structure of the composite showed that carbon nanotubes could be dispersed in…

Conducting polymers and applicationsDielectric materials and actuatorsPolymer Nanocomposite Synthesis and Irradiation

Analyses of Phase Transformation Mechanism Based on In Situ Observation during Ti-10Nb-5Sn Alloy Heating Cycles

Yan Li、Jie Qi、Chuan Xin Zhai 等 4 位作者2012-07-01Advanced materials research

The Ti-10Nb-5Sn alloy was heated and cooled repeatedly in a heater system located in transmission electron microscope chamber. The phase and morphology transformation was in situ observed to analyze the transformation mechanism from austenite β to martensite phase. The results reveal that he Ti-10Nb-5Sn alloy has roun…

Welding Techniques and Residual StressesMetallurgy and Material FormingTitanium Alloys Microstructure and Properties

Nanocomposite of LaVO4/TiO2 as a Wide Spectrum Responsive Photocatalyst for Degradation of Volatile Organic Compounds in the Gas Phase

Han Jie Huang2012-07-01Advanced materials research

In this paper, a wide spectrum responsive LaVO4/TiO2 nanocomposite has been characterized by Laser Raman and X-ray photoelectron spectra (XPS). Strong photocatalytic activities of LaVO4/TiO2 nanocomposite towards the removal of gaseous volatile organic pollutants (typically aromatic compounds) under visible light irra…

TiO2 Photocatalysis and Solar CellsAdvanced Photocatalysis TechniquesCatalytic Processes in Materials Science

Experimental Research on PVDF Membranes Prepared by Supercritical CO2-Induced Phase Inversion

Xue Wu Liu、Yong Qiang Du、Jie Tang2012-07-01Advanced materials research

Microporous polyvinylidene fluoride (PVDF) membranes were prepared by supercritical CO2-induced phase inversion. The structure and morphology of prepared PVDF membranes were characterized by SEM. The effects of processing parameters such as CO2pressure, temperature and PVDF concentration on the membrane morphologies,…

Phase Equilibria and ThermodynamicsMembrane Separation and Gas TransportPolymer Foaming and Composites

Study on Material Constant Values of Ti-6Al-4V-Rare Earth Titanium

Pei Feng Zhao、Qing Fu Wang2012-07-01Advanced materials research

According to hot compressive test date, relationship between flow stress, temperature, strain rate and strain is studied. Material constant value is researched through single regression, such as activation energy Q, stress level parameters and structure factor A. The results show dynamic recovery is principal in the s…

Microstructure and mechanical propertiesMetallurgy and Material FormingAdvanced materials and composites

Influence of Ammonium Hydroxide Treatment on Structural Stability of Polyaniline/Multi–Walled Carbon Nanotube Nanocomposites

Yue Tang、Zong Yi Qin、Na Liu2012-07-01Advanced materials research

The composites consisting of multi–walled carbon nanotubes (MWCNTs) core and polyaniline (PANI) shell were prepared in aqueous solution of hydrochloric acid, and then a de–doping process was achieved through a simple ammonium hydroxide (NH4OH) treatment. The influences of NH4OH treatment on the morphology, microstruct…

Electrochemical sensors and biosensorsConducting polymers and applicationsAnalytical Chemistry and Sensors

Microstructure Evolution in 2024 Aluminum Alloy Produced by Mechanical Alloying

R. Pérez-Bustamante、O. Solís-Canto、P. Pizá-Ruíz 等 5 位作者2012-07-01Microscopy and Microanalysis

Extended abstract of a paper presented at Microscopy and Microanalysis 2012 in Phoenix, Arizona, USA, July 29 – August 2, 2012.

Microstructure and mechanical propertiesAluminum Alloy Microstructure PropertiesAdvanced Materials Characterization Techniques

Study on Graft Copolymerization of Maleic Anhydride onto Ground Rubber Tire

Ling Luo、Xing Wang、Yun Liu 等 4 位作者2012-07-01Advanced materials research

The graft copolymerization of maleic anhydride (MAH) onto ground rubber tire (GRT) was investigated through solvothermal synthesis route using free radical initiator. The effects of solvents, initiators and their concentration, and GRT mesh size on the grafting yield (GY) were studied, and the optimal conditions were…

Polymer crystallization and propertiesbiodegradable polymer synthesis and propertiesFiber-reinforced polymer composites

Sub-diffraction linear spatial filtering with layered metamaterials

Anna Pastuszczak、Marcin Stolarek、Rafał Kasztelanic 等 4 位作者2012-07-01OpenAlex

We describe layered metal-insulator metamaterials using the model of a linear-shift-invariant system. We present the modelling and optimisation strategy for engineering such metamaterials. A variety of point spread functions may be reached, either for superresolution, or for far-field image processing. The first group…

Metamaterials and Metasurfaces ApplicationsPhotonic Crystals and ApplicationsAdvanced Antenna and Metasurface Technologies

Study on Electrospinning of Polyvinyl Butyral/Ethanol Solution

Long Wang、Xinghua Zhang2012-07-01Applied Mechanics and Materials

Preparing polyvinyl butyral (PVB) shrinkage of nanofiber by the electrospinning technology. The main effects of different process parameters on the shape and the diameter of the PVB/ethanol solution electrospun fiber have been discussed. The SEM observation as well as Image-Pro Plus Image processing and SPSS Statistic…

Advanced Sensor and Energy Harvesting MaterialsConducting polymers and applicationsElectrospun Nanofibers in Biomedical Applications

Towards Quantitative X-ray Microanalysis using Manifold Learning

James Scott2012-07-01Microscopy and Microanalysis

Extended abstract of a paper presented at Microscopy and Microanalysis 2012 in Phoenix, Arizona, USA, July 29 – August 2, 2012.

Machine Learning in Materials ScienceElectron and X-Ray Spectroscopy TechniquesAdvanced Materials Characterization Techniques

Spatial distribution of microplasma in small discharge gaps

Marius Blajan、Kazuo Shimizu2012-07-01OpenAlex

Microplasma proved to be an efficient and economical solution for a series of applications such as NOxremoval, indoor air treatment, sterilization of bacteria or surface treatment of polymers1. Moreover among nonthermal plasma technologies microplasma has advantages due to its small size of reactor and power supply. O…

Catalytic Processes in Materials SciencePlasma Applications and DiagnosticsPlasma Diagnostics and Applications

Nano-ZnO Photocatalytic Kinetics Based on Photo-Layer Model

Hang Xu、Min Yue Li2012-07-01Advanced materials research

Nano-ZnO powders were prepared through gel-sol method with zinc acetate and lithium hydroxide as crude material. Nano-ZnO, as photo-catalyst, was used to decompose Methylene Blue at air lift circulating reactor and Photo-Layer model to describe photocatalytic kinetics. The results show that nano-ZnO has a integrate cr…

TiO2 Photocatalysis and Solar CellsAdvanced Photocatalysis TechniquesZnO doping and properties

Kleine Partikel — große Hoffnung

David Eckensberger2012-07-01Nachrichten aus der Chemie

Abstract Liegt in der Nanotechnologie die Zukunft der Medizin? Nanotechnik hilft bei Therapie und Diagnostik. Erste Produkte sind im Markt angekommen, weitere befinden sich in präklinischen oder klinischen Studien.

Nanoparticle-Based Drug DeliveryMicrofluidic and Bio-sensing TechnologiesCharacterization and Applications of Magnetic Nanoparticles