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Comparative Dynamics of Leucine Methyl Groups in FMOC-Leucine and in a Protein Hydrophobic Core Probed by Solid-State Deuteron Nuclear Magnetic Resonance over 7−324 K Temperature Range

Liliya Vugmeyster、Dmitry Ostrovsky、Mark Moses 等 7 位作者2010-11-15The Journal of Physical Chemistry B

Quantitative dynamics of methyl groups in 9-fluorenylmethyloxycarbonyl-leucine (FMOC-leu) have been analyzed and compared with earlier studies of methyl dynamics in chicken villin headpiece subdomain protein (HP36) labeled at L69, a key hydrophobic core position. A combination of deuteron solid-state nuclear magnetic…

Protein Structure and DynamicsEnzyme Structure and FunctionAdvanced NMR Techniques and Applications

One-Dimensional Model for a Direct Methanol Fuel Cell with a 3D Anode Structure

Alfred K. Lam、Brian Wetton、David P. Wilkinson2010-11-15Journal of The Electrochemical Society

A one-dimensional model has been developed to aid in the rapid screening of three-dimensional ͑3D͒ anode configurations for a direct methanol fuel cell.The model was fitted to experimental data for a single electrode structure having 1, 2, or 4 mg cm -2 , and the resulting parameters were used in the model to qualitat…

Electrocatalysts for Energy ConversionAdvancements in Solid Oxide Fuel CellsFuel Cells and Related Materials

A General Polymer Model of Unfolded Proteins under Folding Conditions

Yujie Chen、William J. Wedemeyer、Lisa J. Lapidus2010-11-15The Journal of Physical Chemistry B

There is increasing evidence that a polypeptide chain in solvent conditions that favor folding may have transient structure and is significantly more compact than a fully denatured chain. However, there is no sequence-dependent model to capture such interactions. In this work, we present a simple and computationally i…

Protein Structure and DynamicsProteins in Food SystemsEnzyme Structure and Function

Anisotropy of the Segment Mobility versus Self- and Pair-Correlation Functions in Polymer Melts under Mesoscopic Confinement

Rainer Kimmich、Nail Fatkullin2010-11-15Macromolecules

Techniques typically used for studies of polymer dynamics such as NMR relaxometry, quasielastic neutron scattering, multiple-quantum build-up NMR, dielectric relaxation spectroscopy, and mechanical relaxation are specified and commonly classified in terms of correlation functions. Two categories of correlation functio…

Material Dynamics and PropertiesPolymer Nanocomposites and PropertiesNMR spectroscopy and applications

Long electron dephasing length and disorder-induced spin-orbit coupling in indium tin oxide nanowires

Yao Wen Hsu、Shao-Pin Chiu、An-Shao Lien 等 4 位作者2010-11-15Physical Review B

We have measured the quantum-interference magnetoresistances in two single indium tin oxide (ITO) nanowires between 0.25 and 40 K, by using the four-probe configuration method. The magnetoresistances are compared with the one-dimensional weak-(anti)localization theory to extract the electron dephasing length ${L}_{\en…

ZnO doping and propertiesQuantum and electron transport phenomenaSemiconductor materials and devices

Rheological properties of Ag suspended fluid for inkjet printing

B. J. Park、B. O. Park、B. H. Ryu 等 6 位作者2010-11-15Journal of Applied Physics

Rheological characterization of inks for the inkjet printing application has been considered to be essential with dissemination of applying the inkjet printing technology into many related industries. In this study, the high concentrated Ag suspension was prepared using poly(acrylic acid) as both a polyelectrolyte and…

Liquid Crystal Research AdvancementsRheology and Fluid Dynamics StudiesMaterial Properties and Processing

Inversed tunneling magnetoresistance in hybrid FePt/Fe3O4 core/shell nanoparticles systems

Yunpeng Zhang、Hui Xing、Narayan Poudyal 等 8 位作者2010-11-15Journal of Applied Physics

Magnetotransport studies were performed on hybrid FePt/Fe3O4 core/shell nanoparticle systems. The linear relationship of LnR versus T−1/2 with and without a magnetic field confirms the physical picture of thermally assisted interparticle tunneling. A sign inversion of tunneling magnetoresistance (TMR) from negative to…

Magnetic properties of thin filmsMagnetic Properties and Synthesis of FerritesSurface and Thin Film Phenomena

Direct band gap GaP nanowires predicted through first principles

Charley B. E. Santos、T. M. Schmidt2010-11-15Journal of Applied Physics

GaP nanowire, a potential material for new devices where optical and electronic applications can be merged, suffers some limitations because it presents indirect band gap. Using first principles calculations we demonstrate that, due to confinement effects, the band gap not only is enlarged when in a nanowire form, but…

ZnO doping and propertiesNanowire Synthesis and ApplicationsGa2O3 and related materials

Origin of high solubility of silicon in La2O3: A first-principles study

Naoto Umezawa、Kenji Shiraishi2010-11-15Applied Physics Letters

The solubility of silicon in high-permittivity (high-κ) oxides significantly affects the performance of field-effect transistors. Our comparative study of silicon impurities in La2O3 and HfO2 reveals that the stability of silicon at substitutional sites strongly depends on its coordination number. When substituted for…

ZnO doping and propertiesSemiconductor materials and devicesElectronic and Structural Properties of Oxides

Mathematical Modeling of the Microstructure of Poly(propylene) Made with Ziegler‐Natta Catalysts in the Presence of Electron Donors

Ahmad Alshaiban、João B. P. Soares2010-11-15Macromolecular Reaction Engineering

Abstract Two different modeling techniques, the method of moments and Monte Carlo simulation, were compared for propylene polymerization with coordination catalysts including a new mechanistic step, site transformation by electron donors. We used the models to show how the molecular weight and tacticity distributions…

Organometallic Complex Synthesis and CatalysisAdvanced Polymer Synthesis and CharacterizationLanthanide and Transition Metal Complexes

Enhancement of current injection in inverted organic light emitting diodes with thermal annealing

Po‐Sheng Wang、I‐Wen Wu、Chih‐I Wu2010-11-15Journal of Applied Physics

The enhancement of current density in inverted organic light emitting diodes is achieved by thermal annealing after device process. The current-voltage characteristics of annealed devices are improved as compared to that of nonannealed devices. The current improvement is attributed to the increase in electron injectio…

Organic Electronics and PhotovoltaicsOrganic Light-Emitting Diodes ResearchConducting polymers and applications

Characterization of spin-state tuning in thermally annealed semiconductor quantum dots

E. Margapoti、Fabrízio M. Alves、S. Mahapatra 等 13 位作者2010-11-15Physical Review B

We report a systematic study of magneto-optical properties in CdZnSe/ZnSe semiconductor quantum dots (QDs) subjected to postgrowth thermal annealing. The theoretical and experimental characterizations are combined in order to understand the evolution of Zeeman splitting and the blueshift as well as redshift of the mag…

Semiconductor Quantum Structures and DevicesQuantum Dots Synthesis And PropertiesQuantum and electron transport phenomena

Adipose-Derived Stem Cells for Skin Regeneration

Hiroshi Mizuno、Masaki Nambu2010-11-15Methods in molecular biology

Intractable skin ulcers resulting from diabetes, ischemia and collagen diseases represent significant problems with few solutions. Cell-based therapy may hold promise in overcoming such disorders. In order to establish a suitable experimental model for the treatment of such ulcers using stem cells, this chapter descri…

Mesenchymal stem cell researchElectrospun Nanofibers in Biomedical ApplicationsWound Healing and Treatments

Supramolecular synthon pattern in solid clioquinol and cloxiquine (APIs of antibacterial, antifungal, antiaging and antituberculosis drugs) studied by 35Cl NQR, 1H-17O and 1H-14N NQDR and DFT/QTAIM

Jolanta Natalia Latosińska、Magdalena Latosińska、Marzena Agnieszka Tomczak 等 5 位作者2010-11-15Journal of Molecular Modeling

The quinolinol derivatives clioquinol (5-chloro-7-iodo-8-quinolinol, Quinoform) and cloxiquine (5-chloro-8-quinolinol) were studied experimentally in the solid state via ³⁵Cl NQR, ¹H-¹⁷O and ¹H-¹⁴N NQDR spectroscopies, and theoretically by density functional theory (DFT). The supramolecular synthon pattern of O-H···N…

Crystallography and molecular interactionsNonlinear Optical Materials ResearchSolid-state spectroscopy and crystallography

Magnetic coupling in superconducting spin valves with strong ferromagnets

M. G. Flokstra、J. M. van der Knaap、J. Aarts2010-11-15Physical Review B

We investigate the magnetotransport behavior of ferromagnet (F)/superconductor/ferromagnet trilayers made of ferromagnetic ${\text{Ni}}_{80}{\text{Fe}}_{20}$ (Permalloy, Py) and superconducting Nb for temperatures both above and below the superconducting transition temperature ${T}_{c}$. In such devices, and for weak…

Physics of Superconductivity and MagnetismMagnetic properties of thin filmsMagnetic and transport properties of perovskites and related materials

Raman study of Ca3Co2O6 single crystals

Smita Gohil、Kartik K. Iyer、P. Aswathi 等 5 位作者2010-11-15Journal of Applied Physics

We report Raman scattering experiments on single crystals of Ca3Co2O6. The polarization dependent scattering was used to assign symmetry of the observed vibrational modes. The low temperature experiments show a subtle change in peak widths at 75 K. The increase in the peak widths is also accompanied by a gain in spect…

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

Introduction to Organic Semiconductor Heterojunctions

Haibo Wang、Donghang Yan、Baoxun Du2010-11-15OpenAlex

Foreword. Preface. About the Authors. 1 Organic Heterostructure in Electronic Devices. 1.1 Organic Light-Emitting Diodes. 1.2 Ambipolar Organic Field-Effect Transistors. 1.3 Organic Photovoltaic Cells. 1.4 Parameters in Thin-Film Transistors. References. 2 Weak Epitaxy Growth of Organic Semiconductor Thin Film. 2.1 Fa…

Organic Electronics and PhotovoltaicsConducting polymers and applicationsMolecular Junctions and Nanostructures

An Instability of Diluted Lean Methane/Air Combustion: Modeling and Control

T. Wada、Fabian Jarmolowitz、Dirk Abel 等 4 位作者2010-11-15Combustion Science and Technology

In order to study possibilities of Model Predictive Control (MPC) to low temperature combustion, the authors performed a numerical study of combustion with a lean highly diluted methane/air mixture in a perfectly stirred reactor using a detailed chemical kinetic model. Chosen conditions are the following: equivalence…

Advanced Combustion Engine TechnologiesCatalytic Processes in Materials ScienceCombustion and flame dynamics

Development of chiral N,N-ditopic metalloligands based on a Cinchona alkaloids' backbone for constructing homochiral coordination polymers

Janusz Lewiński、Tomasz Kaczorowski、Iwona Justyniak 等 4 位作者2010-11-15Chemical Communications

The bimetallic chiral bipyridyl-type metalloligands based on aluminium derivatives of cinchonine, [R(2)Al(μ-CN)](2) (R = Me or Et), in combination with the corresponding ZnR(2) compound as nodes were used for the generation of novel homochiral heterometallic coordination polymers of either zig-zag or helical topology,…

Metal-Organic Frameworks: Synthesis and ApplicationsMagnetism in coordination complexesCrystallography and molecular interactions

Di‐ and Triblock siRNA‐PEG Copolymers: PEG Density Effect of Polyelectrolyte Complexes on Cellular Uptake and Gene Silencing Efficiency

Soo Hyun Lee、Hyejung Mok、Tae Gwan Park2010-11-15Macromolecular Bioscience

Di- and triblock siRNA/PEG copolymers were synthesized and complexed with cationic SLN for assessing their gene silencing efficiency as a function of PEG density. A sssiRNA and a sassiRNA were separately conjugated with PEG via a disulfide linkage. AB-type diblock and ABA-type triblock copolymers were successfully pre…

Advanced biosensing and bioanalysis techniquesRNA Interference and Gene DeliveryDendrimers and Hyperbranched Polymers