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Dissociation behaviors of carboxyl and amine groups on carboxymethyl‐chitosan in aqueous system

Lingchong Wang、Xi Guang Chen、Chengsheng Liu 等 5 位作者2008-06-06Journal of Polymer Science Part B Polymer Physics

Abstract Several carboxymethyl‐chitosan (CMCS) samples with different deacetylation degree and/or substituted degree were prepared from the carboxymethylation reaction of chitosan under soft conditions. The products were dissolved in standard HCl aqueous solution to carry out potentiometric titration by using NaOH as…

Nanocomposite Films for Food PackagingConducting polymers and applicationsbiodegradable polymer synthesis and properties

Molecular view of the isothermal transformation of a stable glass to a liquid

Stephen F. Swallen、Kenneth L. Kearns、Sushil K. Satija 等 6 位作者2008-06-06The Journal of Chemical Physics

We have used neutron reflectivity to measure translational motion on the nanometer length scale in exceptionally stable glasses of tris(naphthylbenzene). These glasses are prepared by vapor deposition onto a substrate held somewhat below the glass transition temperature (T(g) = 342 K). When the most stable samples are…

Liquid Crystal Research AdvancementsMaterial Dynamics and PropertiesTheoretical and Computational Physics

Mesoporous Silica Templated Biolabels with Releasable Fluorophores for Immunoassays

Wenyi Cai、I. Gentle、Gao Qing Lu 等 5 位作者2008-06-06Analytical Chemistry

A novel class of fluorescent immuno-biolabeling systems with extremely high F/P ratio (approximately 1000-6000) were prepared by combining the template method and layer-by-layer (LbL) technique. Labels were constructed by loading organic dye fluorescein diacetate (FDA) molecules onto hollow periodic mesoporous organos…

Advanced biosensing and bioanalysis techniquesMesoporous Materials and CatalysisPolymer Surface Interaction Studies

Shape-Controlled Synthesis of Single-Crystalline CdCO3 and Corresponding Porous CdO Nanostructures

Zhiyong Jia、Yiwen Tang、Lijuan Luo 等 4 位作者2008-06-06Crystal Growth & Design

Low-dimensional single-crystalline CdCO 3 nanostructures such as nanowires, nanobelts, nanorolls, and one-dimensional (1D) hierarchical structures have been synthesized through a convenient, low-temperature hydrothermal method, and the products have been characterized by X-ray diffraction, transmission electron micros…

ZnO doping and propertiesGas Sensing Nanomaterials and SensorsCopper-based nanomaterials and applications

Colloidal Nanoparticles of a Europium Complex with Enhanced Luminescent Properties

Xiaofan Wen、Manyu Li、Yuan Wang 等 8 位作者2008-06-06Langmuir

We report an alternative approach, that is, forming Eu(tta)3dpbt (dpbt = 2-( N, N-diethylanilin-4-yl)-4,6-bis(3,5-dimethylpyrazol-1-yl)-1,3,5-triazine, tta = thenoyltrifluoroacetonato) nanoparticles in water/methanol mixtures, to satisfy the combined requirements of good dispersibility in water solutions and efficient…

Luminescence Properties of Advanced MaterialsRadioactive element chemistry and processingLanthanide and Transition Metal Complexes

Reinforcement of maleated natural rubber by precipitated silica

Kannika Sahakaro、Sumsuriya Beraheng2008-06-06Journal of Applied Polymer Science

Abstract Graft copolymers of maleic anhydride and natural rubber or so‐called maleated natural rubbers (MNRs) were prepared in a molten state with varying maleic anhydride contents from 4 to 10 phr. In this work, the filler–filler and filler–rubber interactions of the MNR and precipitated silica were investigated. The…

Polymer crystallization and propertiesPolymer Nanocomposites and PropertiesPolymer composites and self-healing

Preparation and Catalytic Activity for Fischer−Tropsch Synthesis of Ru Nanoparticles Confined in the Channels of Mesoporous SBA-15

Haifeng Xiong、Yuhua Zhang、Shuguo Wang 等 5 位作者2008-06-06The Journal of Physical Chemistry C

Ru nanoparticles confined in the channels of mesoporous SBA-15 with different pore sizes were prepared and investigated as catalysts for the Fischer−Tropsch synthesis. The deviation distribution from Anderson−Schulz−Flory rule was observed. By incorporating Ru nanoparticles into the pore of SBA-15 using surface modifi…

Electrocatalysts for Energy ConversionCatalytic Processes in Materials ScienceCatalysts for Methane Reforming

Morphological and molecular characterisation of a new anamorphic genus Cheirosporium, from freshwater in China

L. Cai、X Y Guo、Kevin D. Hyde2008-06-06Persoonia - Molecular Phylogeny and Evolution of Fungi

Cheirosporium gen. nov. is characterised by the production of sporodochial conidiomata, semi-macronematous to macronematous conidiophores that possess several distinct sterile branches, and cheiroid, smooth-walled conidia with rhexolytic secession. The 28S rDNA and ITS rDNA operon of this taxon were amplified and sequ…

Plant Pathogens and Fungal DiseasesMicrobial Community Ecology and PhysiologyDiatoms and Algae Research

Solid-Phase Growth of Nanostructures from Amorphous Peptide Thin Film: Effect of Water Activity and Temperature

Jungki Ryu、Chan Beum Park2008-06-06Chemistry of Materials

We report the solid-phase self-assembly of nanostructures from amorphous thin film of aromatic peptides. The thickness of amorphous peptide film could be precisely controlled down to ∼50 nm. Aligned nanostructures were grown from the film either by changing water activity in the vapor phase or by applying high thermal…

Supramolecular Self-Assembly in MaterialsSilk-based biomaterials and applicationsPolydiacetylene-based materials and applications

Characterization of high‐performance exfoliated natural rubber/organoclay nanocomposites

Peiyao Li、Li Wang、Guojun Song 等 6 位作者2008-06-06Journal of Applied Polymer Science

Abstract The exfoliated natural rubber (NR)/organoclay nanocomposites were successfully prepared with an optimal organoclay by direction blending. The optimal‐type organoclay was chosen by characterization of XRD and the mechanical properties characterization of the NR/organoclay composites from three kinds of organoc…

Polymer Nanocomposites and PropertiesPolymer composites and self-healingSilicone and Siloxane Chemistry

Probing the Interaction between Peptides and Metal Oxides Using Point Mutants of a TiO2-Binding Peptide

Haibin Chen、Xiaodi Su、K. G. Neoh 等 4 位作者2008-06-06Langmuir

An increasing number of peptides with specific binding affinity to inorganic materials are being isolated using combinatorial peptide libraries without prior knowledge about the interaction between peptides and target materials. The lack of understanding of the mechanism and the contribution of constituent amino acids…

Advanced biosensing and bioanalysis techniquesDiatoms and Algae ResearchCephalopods and Marine Biology

Infrared cloaking based on the electric response of split ring resonators

Boubacar Kanté、A. de Lustrac、Jean–Michel Lourtioz 等 4 位作者2008-06-06Optics Express

Electromagnetic cloak was recently demonstrated in the microwave domain using a metamaterial structure made of metallic split ring resonators (SRR) arranged in a cylindrical geometry. The SRRs were designed to provide a magnetic response that varied in an appropriate manner with the radial coordinate. In the present w…

Antenna Design and AnalysisMetamaterials and Metasurfaces ApplicationsAdvanced Antenna and Metasurface Technologies

VEGF‐Functionalized Polyelectrolyte Multilayers as Proangiogenic Prosthetic Coatings

Sabine Müller、Géraldine Koenig、Anne Charpiot 等 7 位作者2008-06-06Advanced Functional Materials

Abstract Stimulation of transprosthetic vascularization represents an interesting strategy in implantology to allow rapid tissue integration and finally to avoid prosthetic rejection. To achieve this goal, we modified the surface of porous titanium implants with polyelectrolyte multilayer (PEM) films functionalized wi…

Bone Tissue Engineering MaterialsElectrospun Nanofibers in Biomedical ApplicationsPolymer Surface Interaction Studies

A Highly Efficient Organic Nonlinear Optical Donor−Acceptor Single Crystal: l-Valinium Picrate

P. Srinivasan、T. Kanagasekaran、R. Gopalakrishnan2008-06-06Crystal Growth & Design

This report presents the growth and characterization of l -valinium picrate (LVAP) single crystals. Density functional theory at the B3LYP/ HF6-31G (d,p) level has been used to compute the first order hyperpolarizabilty of LVAP. The second harmonic generation (SHG) efficiency of the title compound is reported for the…

Nonlinear Optical Materials ResearchSolid-state spectroscopy and crystallographyMolecular spectroscopy and chirality

Poly(ethylene oxide) Crystallization within a One-Dimensional Defect-Free Confinement on the Nanoscale

Ming-Siao Hsiao、William Y. Chen、Joseph X. Zheng 等 9 位作者2008-06-06Macromolecules

A new approach was designed to study polymer crystallization in a one-dimensional (1D), defect-free, nanoscale confinement utilizing single crystals of poly(ethylene oxide)- block -polystyrene (PEO- b -PS) diblock copolymers as templates. The single crystals grown in dilute solution consisted of a PEO single crystal l…

Polymer crystallization and propertiesAdvanced Polymer Synthesis and CharacterizationBlock Copolymer Self-Assembly

Recent Developments in Cyclic Acetal Biomaterials for Tissue Engineering Applications

Erin E. Falco、Minal Patel、John P. Fisher2008-06-06Pharmaceutical Research

At an ever increasing pace, synthetic biomaterials are being developed with specific functionalities for tissue engineering applications. These biomaterials possess properties including biocompatibility, mechanical strength, and degradation as well as functionalities such as specific cell adhesion and directed cell mi…

Bone Tissue Engineering MaterialsOrthopaedic implants and arthroplastybiodegradable polymer synthesis and properties

Effect of thermal expansion on shape memory behavior of polyurethane and its nanocomposites

Işın Güneş、Feina Cao、Sadhan Jana2008-06-06Journal of Polymer Science Part B Polymer Physics

Abstract The effects of thermal expansion on shape memory performance of shape memory polyurethanes and their nanocomposites with organoclay, carbon nanofiber (CNF), silicon carbide (SiC), and carbon black (CB) were evaluated. The shape memory test cycle involved tensile deformation at above the trigger temperature to…

Polymer Nanocomposites and PropertiesPolymer composites and self-healingSilicone and Siloxane Chemistry

Conventional Scanning Electron Microscopy of Bacteria

Miloslav Kaláb、Ann-Fook Yang、Denise Chabot2008-06-06infocus Magazine

Scanning electron microscopy (SEM) is one of the best suited out of a variety of procedures to visualise the external appearance of bacteria. Bacteria live in various environments and their preparation for SEM thus takes their nature into consideration. The basic principles of isolation, fixation, dehydration, drying,…

Advanced Electron Microscopy Techniques and ApplicationsElectron and X-Ray Spectroscopy Techniques

Ceramic‐based Anode Materials for Improved Redox Cycling of Solid Oxide Fuel Cells

Qingfeng Fu、Frank Tietz2008-06-06Fuel Cells

Abstract In order to improve the reliability of anode‐supported solid oxide fuel cells (SOFCs) in terms of tolerance to redox cycles, and to minimise fuel preprocessing for the direct use of readily available hydrocarbons in SOFCs, alternative ceramic‐based anode substrate materials and functional anode materials were…

Advancements in Solid Oxide Fuel CellsCatalysis and Oxidation ReactionsElectronic and Structural Properties of Oxides

Protein Resistance of PEG-Functionalized Dendronized Surfaces: Effect of PEG Molecular Weight and Dendron Generation

S. Rahima Benhabbour、Heather Sheardown、Alex Adronov2008-06-06Macromolecules

Dendronized surfaces were prepared by chemisorption of poly(ethylene glycol) monothiol (HS-PEG 650 -OH) onto gold-coated silicon wafers followed by functionalization of the PEG terminal OH group with aliphatic polyester dendrons, generation 1−4, using divergent dendron growth. PEG monomethyl ether (PEG-OMe) chains of…

Polymer Surface Interaction StudiesDendrimers and Hyperbranched PolymersAdvanced Biosensing Techniques and Applications