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Structure of the first representative of Pfam family PF04016 (DUF364) reveals enolase and Rossmann-like folds that combine to form a unique active site with a possible role in heavy-metal chelation

Mitchell D. Miller、L. Aravind、Constantina Bakolitsa 等 38 位作者2010-07-06Acta Crystallographica Section F Structural Biology and Crystallization Communications

The crystal structure of Dhaf4260 from Desulfitobacterium hafniense DCB-2 was determined by single-wavelength anomalous diffraction (SAD) to a resolution of 2.01 Å using the semi-automated high-throughput pipeline of the Joint Center for Structural Genomics (JCSG) as part of the NIGMS Protein Structure Initiative (PSI…

Protein Structure and DynamicsEnzyme Structure and FunctionAmino Acid Enzymes and Metabolism

Study on elastic modulus of crosslinked polyurethane/organoclay nanocomposites

Mehrnaz Joulazadeh、Amir H. Navarchian2010-07-06Polymers for Advanced Technologies

Abstract In this paper, two polyurethane/clay nanocomposite systems with crosslinked structure were synthesized via in situ polymerization of a polyether‐ as well as a polyester‐based prepolymer with methylene‐bis‐ ortho ‐chloroanilline (MOCA). Two types of modified clays with different organic modifiers were used in…

Concrete and Cement Materials ResearchPolymer Nanocomposites and PropertiesPolymer composites and self-healing

The influence of antiwear additive concentration on the tribological behaviour of a-C:H:W/steel tribosystem

M. Vlad、M. Szczerek、R. Michalczewski 等 6 位作者2010-07-06Proceedings of the Institution of Mechanical Engineers Part J Journal of Engineering Tribology

The effect of antiwear (AW) commercial additive concentration on the load-carrying capacity (scuffing resistance) of a-C:H:W/steel tribo-system intended for heavy-loaded machine parts was investigated. For comparison, steel/steel contacts were also investigated. The scuffing resistance has been measured as the limitin…

Metal and Thin Film MechanicsDiamond and Carbon-based Materials ResearchLubricants and Their Additives

Crystallization behavior of polypropylene/polyamide 6/montmorillonite nanocomposites

Qian Wang、Xiao Wang、Pengfei Fang 等 8 位作者2010-07-06Polymer International

Abstract Polymer blended materials such as polyamide 6 (PA6)/polypropylene (PP) blends have received considerable attention in recent years. To improve the compatibility of PA6 and PP, compatibilizers like maleic anhydride‐ g ‐polypropylene (MPP) are often added. In addition, organically modified montmorillonite (MMT)…

Polymer crystallization and propertiesPolymer Nanocomposites and Propertiesbiodegradable polymer synthesis and properties

Photocurrent switching method based on photoisomerization of diarylethene layer for nondestructive readout of photochromic optical memory

Tsuyoshi Tsujioka、Itaru Onishi、Daisuke Natsume2010-07-06Applied Optics

We report on photocurrent switching based on photoisomerization for the nondestructive readout of photochromic optical memory. The photoisomerization of a diarylethene (DAE) memory layer switched the photocurrent generated in a light-absorbing phthalocyanine layer upon irradiation of a laser light. This switching is b…

Neurobiology and Insect Physiology ResearchPhotochromic and Fluorescence ChemistryPhotoreceptor and optogenetics research

Isolation of the Triplet Ground State Aminyl Diradical

Przemysław J. Boratyński、Maren Pink、Suchada Rajca 等 4 位作者2010-07-06Angewandte Chemie

Mit Spin gespielt: Ein High-Spin-Aminyldiradikal (siehe Strukturformel) mit Triplett-Grundzustand (S=1) verfügt über einen großen Singulett-Triplett-Abstand ΔEST. Die effektive Abschirmung der reaktiven radikalischen Aminylzentren sorgt für die Beständigkeit bei Raumtemperatur und das planare π-System, das für den Tri…

Magnetism in coordination complexesSynthesis and Properties of Aromatic CompoundsAdvanced NMR Techniques and Applications

Ligands in PSI structures

Abhinav Kumar、Hsiu‐Ju Chiu、Herbert L. Axelrod 等 7 位作者2010-07-06Acta Crystallographica Section F Structural Biology and Crystallization Communications

Approximately 65% of PSI structures report some type of ligand(s) that is bound in the crystal structure. Here, a description is given of how such ligands are handled and analyzed at the JCSG and a survey of the types, variety and frequency of ligands that are observed in the PSI structures is also compiled and analyz…

Protein Structure and DynamicsChemical Synthesis and AnalysisEnzyme Structure and Function

Phosphorus Ligand Imaging with Two‐Photon Fluorescence Spectroscopy: Towards Rational Catalyst Immobilization

Fabrizio Marras、Alexander M. Kluwer、Joanna R. Siekierzycka 等 6 位作者2010-07-06Angewandte Chemie International Edition

Spotless catalysts: Ligand immobilization was studied by two-photon fluorescence microscopy with a fluorescent nixantphos ligand as probe (see picture). In the immobilization process ligand aggregates form in solution and are deposited on the support, where they appear as bright spots in fluorescence images. Preventin…

Porphyrin and Phthalocyanine ChemistryChemical Synthesis and AnalysisOxidative Organic Chemistry Reactions

Structure and Phase Transformations in the Titanosilicate, Sitinakite. The Importance of Water

Gordon J. Thorogood、Brendan J. Kennedy、Christopher S. Griffith 等 8 位作者2010-07-06Chemistry of Materials

Synchrotron X-ray diffraction and neutron diffraction have been used to investigate the phase changes that the titanosilicate mineral sitinakite undergoes when dehydrated. Refinements of the powder diffraction data of the material before and after heating to 573K indicate a phase change from space group P 4 2 / mcm to…

Zeolite Catalysis and SynthesisCrystal Structures and PropertiesChemical Synthesis and Characterization

Measurement and Control of Ultrashort Optical Pulse Propagation in Metal Nanoparticle-Covered Dielectric Surfaces

Jess M. Gunn、Scott H. High、Vadim V. Lozovoy 等 4 位作者2010-07-06The Journal of Physical Chemistry C

In this paper, we present a detailed study of localized two-photon photoluminescence from metal nanoparticles on a dielectric surface. An ultrafast (∼13 fs) near-infrared laser focused on a micrometer sized region is used to excite a silver nanoparticle covered quartz or mica substrate, and a pulse shaper is used to c…

Gold and Silver Nanoparticles Synthesis and ApplicationsPlasmonic and Surface Plasmon ResearchNonlinear Optical Materials Studies

Spectroscopic and structural investigations of α‐, β‐, and γ‐AlH 3 phases

Felicia Manciu、Layra Reza、William Durrer 等 6 位作者2010-07-06Journal of Raman Spectroscopy

Abstract With its reputation as a high‐energy density fuel, aluminum hydride (AlH 3 ) has received renewed attention as a material that is particularly suitable, not only for hydrogen storage but also for rocket propulsion. While the various phases of AlH 3 have been investigated theoretically, there is a shortage of…

Hydrogen Storage and MaterialsNuclear Materials and PropertiesBoron and Carbon Nanomaterials Research

A Cohesive Law for Carbon Nanotube/Polymer Interface Accounting for Chemical Covalent Bonds

Liying Jiang2010-07-06Mathematics and Mechanics of Solids

The influence of chemical bonds formed between a single-walled carbon nanotube (CNT) and a polymer matrix upon the interface behavior has been studied through the development of an interfacial cohesive law. By using the interatomic potential directly, the tensile cohesive stress and cohesive energy for the interface w…

Carbon Nanotubes in CompositesSmart Materials for ConstructionNanotechnology research and applications

Borate Accelerates Rates of Steady Oxygen‐Isotope Exchange for Polyoxoniobate Ions in Water

Eric M. Villa、C. André Ohlin、William H. Casey2010-07-06Chemistry - A European Journal

Borate: guilty and charged! The borate ion, and possibly carbonate, enhances rates of steady oxygen-isotope exchanges at some, but not all, structural sites in polyoxometalate ions. Addition of an oxygen atom to an incoming neutral boric acid molecule (blue=boron) from a bridging oxygen atom on a decametalate ion is s…

Polyoxometalates: Synthesis and ApplicationsChemical Synthesis and ReactionsChemical Synthesis and Characterization

Effect of nonsolvent on morphologies of polyamide 6 electrospun fibers

Wei Wei、Jen‐Taut Yeh、Peng Li 等 6 位作者2010-07-06Journal of Applied Polymer Science

Abstract The effect of nonsolvent on morphologies of electrospun polyamide 6 (PA6) fibers was reported in this study. An investigation of electrospinning PA6 / formic acid (FA) / dichloromethane (DCM) solutions was conducted, wherein FA was used as solvent and DCM was used as nonsolvent for PA6. It is interesting to n…

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

Structure characterization and wear performance of NiTi thermal sprayed coatings

N. Cinca、A. Isalgué、J. Fernández 等 4 位作者2010-07-06Smart Materials and Structures

NiTi shape memory alloy (SMA) has been studied for many years for its shape memory and pseudoelastic properties, as well as its biocompatibility, which make it suitable for many biomedical applications. However, SMA NiTi is also interesting for relevant wear resistance near the transition temperature which, along with…

Metal and Thin Film MechanicsShape Memory Alloy TransformationsHigh Entropy Alloys Studies

Ultrafast Photodeposition of Size‐Controlled PbS Quantum Dots on TiO2

Yasuaki Jin‐nouchi、Tomoki Akita、Hiroaki Tada2010-07-06ChemPhysChem

A surface-modifier-assisted photodeposition technique for directly depositing PbS quantum dots on mesoporous TiO2 nanocrystalline films is developed (see figure). The addition of mercaptoacetic acid (MAA) drastically increases the photodeposition rate and significantly blueshifts the absorption edge. The PbS particle…

Advanced Photocatalysis TechniquesQuantum Dots Synthesis And PropertiesChalcogenide Semiconductor Thin Films

Morphology, Optical, and Magnetic Properties of Zn 1− x Co x O Nanorods Grown via a Wet Chemical Route

Fransiska Cecilia Kartawidjaja、Zi Yi Lim、Serene Lay Geok Ng 等 5 位作者2010-07-06Journal of the American Ceramic Society

Co‐doped ZnO nanorods (Zn 1− x Co x O) with x =0.05, 0.1, and 0.2 were successfully grown on indium‐doped tin oxide glass substrates via a wet chemical route at 70°C for 10 h. The effect of Co‐doping level on the morphology, crystalline phases, optical, and magnetic properties of the ZnO nanorods was studied. Based on…

ZnO doping and propertiesCopper-based nanomaterials and applicationsGa2O3 and related materials

PrimerIdent: A web based tool for conserved primer design

A.M. Pessoa、Susana P. Pereira、Jorge Teixeira2010-07-06Bioinformation

UNLABELLED: Conserved primers across multiple species and simultaneously specific for a certain isozyme can be rare and difficult to find. PrimerIdent was developed aiming to automate this primer design and selection process in a given nucleotide sequence alignment, providing an intuitive, easy to interpret graphical…

Enzyme Structure and FunctionMetalloenzymes and iron-sulfur proteinsMicrobial metabolism and enzyme function

Preparation and properties of biocomposites composed of glycerol‐based epoxy resins, tannic acid, and wood flour

Mitsuhiro Shibata、Naozumi Teramoto、Yoshiro Takada 等 4 位作者2010-07-06Journal of Applied Polymer Science

Abstract After polyglycerol polyglycidyl ether (PGPE) and glycerol polyglycidyl ether (GPE) were mixed with tannic acid (TA) in ethanol and without solvent at epoxy/hydroxyl ratio 1/1, the obtained GPE‐TA and PGPE‐TA solutions were mixed with wood flour (WF), prepolymerized at 50°C, and subsequently compressed at 160°…

Natural Fiber Reinforced Compositesbiodegradable polymer synthesis and propertiesPolymer composites and self-healing

A one-pot strategy for biomimetic synthesis and self-assembly of gold nanoparticles

Yi Wang、Liqiang Chen、Yuan Fang Li 等 6 位作者2010-07-06Nanotechnology

A simple, one-pot and controllable strategy is reported in this contribution for biomimetic synthesis and self-assembly of gold nanoparticles (Au-NPs). It involves our synthesized polyaldehyde dextran (PAD), which has been proved to be a biomacromolecule with excellent biocompatibility and biodegradability, acting as…

Gold and Silver Nanoparticles Synthesis and ApplicationsPolymer Surface Interaction StudiesSilk-based biomaterials and applications