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Synthesis of Core‐Crosslinked Nanoparticles with Controlled Cylindrical Shape and Narrowly‐Dispersed Size via Core‐Shell Brush Block Copolymer Templates

Cheng Chen、Ke Qi、David S. Germack 等 5 位作者2007-09-05Advanced Materials

Core-crosslinked nanocylinders with well-defined shape and narrowly-dispersed size are prepared by using S2Cl2 to react with the alkenyl functionalities of the PNb-g-PIp-based core domain of cylindrical core-shell brush block copolymer, PNb-g-PIp-b-PtBA (see figure). This strategy potentially may be further extended b…

Advanced Polymer Synthesis and CharacterizationBlock Copolymer Self-AssemblyNanomaterials for catalytic reactions

Characterization and ornidazole release in vitro of a novel composite film prepared with chitosan/poly(vinyl alcohol)/alginate

Hong Na Pei、Xi Guang Chen、Yan Li 等 4 位作者2007-09-05Journal of Biomedical Materials Research Part A

To create a moist environment for rapid wound healing, a new C-P-A film with sustained antibacterial capacity had been developed by the casting/solvent evaporation method. This new type of C-P-A film consists of a chitosan top layer and sodium alginate sublayer separated by an ornidazole-incorporated poly(vinyl alcoho…

Nanocomposite Films for Food PackagingElectrospun Nanofibers in Biomedical ApplicationsPolymer Surface Interaction Studies

Design and Synthesis of Cellulose Derivatives with Antioxidant Activity

Sonia Trombino、Roberta Cassano、Ermelinda Bloise 等 7 位作者2007-09-05Macromolecular Bioscience

In this study we report the synthesis and characterisation of cellulose ferulate, lipoate and alpha-tocopherulate, and their ability to inhibit lipid peroxidation in rat-liver microsomal membranes, induced in vitro by two different sources of free radicals: tert-butyl hydroperoxide and 2,2'-azobis-(2-amidinopropane).…

biodegradable polymer synthesis and propertiesAdvanced Glycation End Products researchBiochemical Acid Research Studies

A Novel Cryo‐SEM Technique for Imaging Vegetable Oil Based Organogels

Michael A. Rogers、A.K. Smith、Amanda J. Wright 等 4 位作者2007-09-05Journal of the American Oil Chemists Society

Abstract Gels were prepared by cooling dilute solutions (2% wt/wt) of 12‐hydroxystearic acid (12‐HSA) in canola oil and storing them at 30 °C for 24 h. The gel's in‐situ supramolecular network structure was imaged using four techniques: polarized light microscopy (PLM), 3‐dimensional deconvolution polarized light micr…

Supramolecular Self-Assembly in MaterialsFood Chemistry and Fat AnalysisPolydiacetylene-based materials and applications

Studies on cotton–acrylic bulked yarns and fabrics. Part II: Fabric characteristics

Apurba K. Das、V. K. Kothari、M. Balaji2007-09-05Journal of the Textile Institute

The present work is concerned with the study of the characteristics of plain-woven fabric produced with cotton–acrylic high-bulk yarns. Cotton–acrylic blended bulked yarns of various yarn counts, proportion of shrinkable acrylic fibre and twist levels have been prepared by relaxing shrinkable component of the yarns us…

Mechanical Behavior of CompositesTextile materials and evaluationsStructural Analysis and Optimization

The structure–function relationship analysis of Prismalin‐14 from the prismatic layer of the Japanese pearl oyster, Pinctada fucata

Michio Suzuki、Hiromichi Nagasawa2007-09-05FEBS Journal

The mollusk shell is a hard tissue consisting of calcium carbonate and organic matrices. The organic matrices are considered to play important roles in shell formation. We have previously identified a prismatic layer-specific protein named Prismalin-14, which consists of 105 amino acid residues and includes four struc…

Bone Tissue Engineering MaterialsCalcium Carbonate Crystallization and InhibitionVitamin K Research Studies

Novel Structure of AAO Film Fabricated by Constant Current Anodization

Songrui Zhao、Kenneth Chan、A. Yelon 等 4 位作者2007-09-05Advanced Materials

AAO films with a novel six-membered ring structure were prepared by constant current anodization. The six-membered ring contains smaller pores, formed at the triple junction sites of the larger pores. The interpore distance was reduced from the usual 85 nm to 50 nm, doubling the usual pore density. These novel AAO fil…

Concrete Corrosion and DurabilityAnodic Oxide Films and NanostructuresSmart Materials for Construction

Mechanism of the strong magnetic refrigerant performance ofLaFe13−xSix

M. D. Kuz’min、Manuel Richter2007-09-05Physical Review B

Electronic structure calculations reveal the presence of several shallow minima and maxima in the energy-vs-magnetization curves, which otherwise are surprisingly flat. The main implication---a fast magnetization and/or demagnetization process with little hysteresis---is of primary importance for the performance of ${…

Magnetic and transport properties of perovskites and related materialsRare-earth and actinide compoundsMagnetic Properties of Alloys

Improvement in the Temperature Stability of a BaTiO 3 ‐Based Multilayer Ceramic Capacitor by Constrained Sintering

Wen‐His Lee、Chi‐Yi Su2007-09-05Journal of the American Ceramic Society

In this study, a self‐constrained BaTiO 3 material system, composed of a low‐fire BaTiO 3 ‐based X7R (Δ C / C ±15% within −55° to 125°C) MLCC dielectric and a high‐fire, BaTiO 3 ‐based X7R MLCC dielectrics eliminated sintering aid that are laminated on both sides of the BaTiO 3 ‐based X7R MLCC, has been developed. The…

Ferroelectric and Piezoelectric MaterialsDielectric materials and actuatorsMicrowave Dielectric Ceramics Synthesis

DOCKGROUND system of databases for protein recognition studies: Unbound structures for docking

Ying Gao、Dominique Douguet、Andrey Tovchigrechko 等 4 位作者2007-09-05Proteins Structure Function and Bioinformatics

Computational docking approaches are important as a source of protein-protein complexes structures and as a means to understand the principles of protein association. A key element in designing better docking approaches, including search procedures, potentials, and scoring functions is their validation on experimental…

Protein Structure and DynamicsComputational Drug Discovery MethodsEnzyme Structure and Function

Design of optical path for wide-angle gradient-index antireflection coatings

Minfeng Chen、Hung-Chun Chang、Allan Chang 等 6 位作者2007-09-05Applied Optics

What we believe to be a new principle is introduced for the design and selection of gradient-index antireflection profiles that are effective over a wide range of incident angles as well as wavelengths at a given physical film thickness. It is shown that at oblique incidence the smoothness of the optical path of incid…

Advanced Surface Polishing TechniquesOptical Coatings and GratingsSurface Roughness and Optical Measurements

Chiral memory: Induction, amplification, and switching in porphyrin assemblies

Rosaria Lauceri、Alessandro D’Urso、Angela Mammana 等 4 位作者2007-09-05Chirality

The interaction between the tetra-anionic porphyrin H2TPPS and its copper derivative, CuTPPS, with the tetra-cationic porphyrin H2T4 and its copper derivative, CuT4, leads, in aqueous solution, to the formation of remarkably stable and kinetically inert heteroaggregates. The aggregation process is under hierarchic con…

Molecular Sensors and Ion DetectionSupramolecular Chemistry and ComplexesPorphyrin and Phthalocyanine Chemistry

Separation of Metallic and Semiconducting Single‐Walled Carbon Nanotubes via Covalent Functionalization

Stéphane Campidelli、Moreno Meneghetti、Maurizio Prato2007-09-05Small

Chemical functionalization can help separate semiconducting from metallic single-walled carbon nanotubes (SWNTs). Depending on their geometry, SWNTs can be either metallic or semiconducting (see image). They are so far the only known material to possess this unique property. For electronic applications it is of vital…

Carbon Nanotubes in CompositesGraphene research and applicationsNanopore and Nanochannel Transport Studies

Nanostructure‐Based Leaf‐like Polyaniline in the Presence of an Amphiphilic Triblock Copolymer

Jialuo Han、Guojun Song、Rong Guo2007-09-05Advanced Materials

Nanostructure-based leaf-like polyaniline (PANI) (see figure) has been fabricated successfully in the presence of surfactant F127. It is found that the building blocks of leaf-like PANI can be tuned from nanofibers (ca. 25 nm in diameter) to nanotubes (ca. 100 nm in diameter) with increasing monomer concentration. The…

Supercapacitor Materials and FabricationAdvanced Sensor and Energy Harvesting MaterialsConducting polymers and applications

Host Structure Engineering in Thermoelectric Clathrates

Mogens Christensen、Bo B. Iversen2007-09-05Chemistry of Materials

Three Ba 8 Al 16 Ge 30 clathrate type I samples have been prepared using three different synthesis methods; flux growth, Czochralski growth, and stoichiometric mixing. The samples were characterized by X-ray powder diffraction, multi-temperature single-crystal X-ray diffraction, high-resolution low-temperature (20 K)…

Advanced Thermoelectric Materials and DevicesMagnetic and transport properties of perovskites and related materialsThermal Expansion and Ionic Conductivity

Soft Mechanical Sensors Through Reverse Actuation in Polypyrrole

Yujuan Wu、Gürsel Alıcı、John D. W. Madden 等 5 位作者2007-09-05Advanced Functional Materials

Abstract The phenomenon of voltage generated from a soft sensor using polypyrrole in response to mechanical deformation is described and investigated. The sensor consists of two polypyrrole layers in contact with an electrolyte and operates in bending mode in air. The magnitude and sign of the induced voltage was foun…

Advanced Sensor and Energy Harvesting MaterialsConducting polymers and applicationsAnalytical Chemistry and Sensors

Molecular Mechanism of Physical Gelation of Hydrocarbons by Fatty Acid Amides of Natural Amino Acids.

Asish Pal、Yamuna Krishnan Ghosh、Santanu Bhattacharya2007-09-05ChemInform

Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.

Supramolecular Self-Assembly in MaterialsDendrimers and Hyperbranched PolymersPolydiacetylene-based materials and applications

Application of warp-knitted spacer fabrics in car seats

X. Ye、Raúl Fangueiro、Hong Hu 等 4 位作者2007-09-05Journal of the Textile Institute

Polyurethane foam is commonly used as padding in car seats despite some problems concerning comfort and recycling. Compared with polyurethane foam, textile seat padding is easier to recycle; so textile padding is a good candidate to substitute foam padding as regulations on recycling have become more stringent on car…

Textile materials and evaluationsErgonomics and Musculoskeletal DisordersColor perception and design

CLEARER: a new tool for the analysis of X-ray fibre diffraction patterns and diffraction simulation from atomic structural models

O. Sumner Makin、Pawel Sikorski、Louise C. Serpell2007-09-05Journal of Applied Crystallography

Fibre diffraction can provide structural information about polymers and biopolymers that is unobtainable using other methods. This method has been used to elucidate the structures of many polymers, biopolymers and protein assemblies. Extracting structural information from fibre diffraction patterns is a major challeng…

Advanced Cellulose Research StudiesEnzyme Structure and FunctionFiber-reinforced polymer composites

Origin of Microstructures from Confined Asymmetric Diblock Copolymers

Peng Chen、Haojun Liang、An‐Chang Shi2007-09-05Macromolecules

The self-assembly of asymmetric diblock copolymers confined within cylindrical pores is studied using the self-consistent-field theory. The cylinder-forming asymmetric diblock copolymer is chosen to be near the cylinder−gyroid phase boundary in the intermediate segregation region. This choice makes the self-assembled…

Polymer Surface Interaction StudiesBlock Copolymer Self-AssemblySurface Chemistry and Catalysis