Keiji Numata、Yoshihiro Kikkawa、Takeharu Tsuge 等 6 位作者2005-05-12Biomacromolecules
Enzymatic degradation processes of poly[(R)-3-hydroxybutyric acid] (P(3HB)) and poly[(R)-3-hydroxybutyric acid-co-(R)-3-hydroxyvaleric acid] (P(3HB-co-3HV)) single crystals in the presence of PHB depolymerase from Ralstonia pickettii T1 were studied by real-time and static atomic force microscopy (AFM) observations. F…
Polymer crystallization and propertiesbiodegradable polymer synthesis and propertiesMicroplastics and Plastic Pollution
Makoto Katô、Kazunobu Toshima、Shuichi Matsumura2005-05-12Biomacromolecules
An aliphatic polythioester was enzymatically prepared by the direct polycondensation of mercaptoalkanoic acid using immobilized lipase of Candida antarctica (lipase CA) in bulk. The commercially available 11-mercaptoundecanoic acid was polymerized by lipase CA in bulk in the presence of molecular sieves 4A as a water…
Enzyme Catalysis and Immobilizationbiodegradable polymer synthesis and propertiesChemical Synthesis and Analysis
Sahori B. Yamaki、Davison S. Barros、Camila Martins Garcia 等 6 位作者2005-05-12Langmuir
The adsorption of Congo red and tinopal CBS dyes on cellulose fibers was investigated using electronic absorption and fluorescence spectroscopies. Hydrogen bonds appear to be relevant for the dye-fiber interactions as indicated by the solvatochromism of Congo red in water, methanol, and dimethyl sulfoxide solutions, a…
Gold and Silver Nanoparticles Synthesis and ApplicationsConducting polymers and applicationsDyeing and Modifying Textile Fibers
Alessandro Piras、Sara Colussi、Alessandro Trovarelli 等 7 位作者2005-05-12The Journal of Physical Chemistry B
A series of CeO(2)/Al(2)O(3) samples with different ceria loadings in the range 0-25 wt % (0, 2, 5, 7.5, 15, and 25%) were prepared by incipient wetness and studied using several complementary techniques such as Brunauer-Emmett-Teller (BET), X-ray diffraction (XRD), temperature-programmed reduction (TPR), Raman, high-…
Catalytic Processes in Materials ScienceCatalysis and Oxidation ReactionsCopper-based nanomaterials and applications
Sang Hyuk Seo、Ji Young Chang2005-05-12Chemistry of Materials
Linear 1 H -imidazole amphiphiles ( 1 − 3 ) were synthesized by the esterification reaction of 4‘-alkyloxy phenol with 4-chlorocarbonyl imidazole. They formed organogels. When 1 N of the imidazole head was blocked by an ethyl group, however, the compound ( 4 ) did not self-assemble. The SAX and TEM study revealed that…
Lipid Membrane Structure and BehaviorSupramolecular Self-Assembly in MaterialsPolydiacetylene-based materials and applications
A. E. Clark、M. Wun‐Fogle、J. B. Restorff 等 6 位作者2005-05-12Journal of Applied Physics
The temperature dependence of the lowest order magnetic anisotropy constant K1 and the lowest order saturation magnetostriction constant, (3∕2)λ100, were measured from 4 K to 300 K for Fe91.4Ga8.6,Fe83.4Ga16.6, and Fe71.5Ga28.5 and were compared to the normalized magnetization power law, ml(l+1)∕2. Fe91.4Ga8.6 maintai…
Magnetic properties of thin filmsMagnetic Properties and ApplicationsMagneto-Optical Properties and Applications
J. Feuchtwanger、Marc Richard、Yun Tang 等 6 位作者2005-05-12Journal of Applied Physics
Ferromagnetic shape memory alloys can respond to a magnetic field or applied stress by the motion of twin boundaries and hence they show large hysteresis or energy loss. Ni–Mn–Ga particles made by spark erosion have been dispersed and oriented in a polymer matrix to form pseudo 3:1 composites which are studied under a…
Shape Memory Alloy Transformations
Zhongze Gu、Hongmei Wei、Ruiqian Zhang 等 8 位作者2005-05-12Applied Physics Letters
Creatures adapted to environmental conditions in a variety of ways, on the macroscopic as well as the microscopic scale. The evolved structures always give a hint about the design of functional materials. Recently, inspired by the trichomes on the surface of silver ragwort, we fabricated a surface with superhydrophobi…
Surface Modification and SuperhydrophobicityAdvanced Sensor and Energy Harvesting MaterialsAdvanced Materials and Mechanics
João B. P. Soares、Siripon Anantawaraskul2005-05-12Journal of Polymer Science Part B Polymer Physics
Abstract Crystallization analysis fractionation (CRYSTAF) is an analytical technique for determining the distribution of chain crystallizabilities of semicrystalline polymers. After only approximately a decade since it was developed, CRYSTAF has become one of the most important characterization techniques in polyolefi…
Organometallic Complex Synthesis and CatalysisPolymer crystallization and propertiesAdvanced Polymer Synthesis and Characterization
Shinşuke Yamanaka、Ken Kurosaki、Taku Oyama 等 7 位作者2005-05-12Journal of the American Ceramic Society
Polycrystalline samples of strontium series perovskite‐type oxides, SrCeO 3 and SrZrO 3 , were prepared and the thermophysical properties were measured. The chemical compositions of the samples do not deviate from the stoichiometric composition. The oxygen‐to‐metal (O/M) ratios of SrCeO 3 and SrZrO 3 are 3.00±0.03 and…
Advancements in Solid Oxide Fuel CellsNuclear Materials and PropertiesElectronic and Structural Properties of Oxides
Li-Min Wang、Ranko Richert2005-05-12The Journal of Physical Chemistry B
Many hydrogen-bonded liquids, especially glass-forming cases, display a dielectric relaxation behavior that differs qualitatively from that of other simple liquids. The majority of models aimed at explaining this unusual dielectric behavior associate the prominent Debye process with structural relaxation, viscous flow…
Liquid Crystal Research AdvancementsMaterial Dynamics and PropertiesThermodynamic properties of mixtures
Hideaki Yokoyama、Takayuki Miyamae、Seok Hee Han 等 7 位作者2005-05-12Macromolecules
A block copolymer of deuterated polystyrene (dPS) and 2-[2-(2-methoxyethoxy)ethoxy]ethyl methacrylate (PME3MA) spontaneously exposes the PME3MA block, which is soluble in water, to the surface in a vacuum. dPS−PME3MA mixed with polystyrene (PS) segregates to the PS surface and changes the hydrophobic PS surface into h…
Polymer Surface Interaction StudiesBlock Copolymer Self-AssemblyElectrostatics and Colloid Interactions
Yujing Li、Om Parkash Dhankher、Laura Carreira 等 5 位作者2005-05-12Environmental Toxicology and Chemistry
Cysteine sulfhydryl-rich peptide thiols are believed to play important roles in the detoxification of many heavy metals and metalloids such as arsenic, mercury, and cadmium in plants. The gamma-glutamylcysteine synthetase (gamma-ECS) catalyzes the synthesis of the dipeptidethiol gamma-glu-cys (gamma-EC), the first ste…
Plant Stress Responses and ToleranceArsenic contamination and mitigationCarbon and Quantum Dots Applications
Weiyou Yang、Zhipeng Xie、Jingjing Li 等 6 位作者2005-05-12Journal of the American Ceramic Society
Single‐crystalline α‐Si 3 N 4 nanowires were synthesized by thermal decomposition of a polysilazane preceramic polymer using FeCl 2 powders as catalyst. The nanowires, which are 20–40 nm in diameter and up to several mm in length, possess smooth surfaces and uniform diameters along the entire length and contain no det…
Ferroelectric and Piezoelectric MaterialsAdvanced ceramic materials synthesisMetal and Thin Film Mechanics
Andrew J. Allen2005-05-12Journal of the American Ceramic Society
This paper reviews some recent advances in small‐angle X‐ray and neutron scattering methods and their application to address complex issues in ceramic systems of technological importance. It is shown how small‐angle scattering (SAS) can be applied to ceramic systems in order to extract statistically representative mic…
Concrete and Cement Materials ResearchAdvanced ceramic materials synthesisX-ray Diffraction in Crystallography
Didier Felbacq、Guy Bouchitté2005-05-12Physical Review Letters
We provide a rigorous theoretical basis for the artificial magnetic activity of metamaterials near resonances. Our approach is a renormalization-based scheme that authorizes a completely general theory. The major result is an explicit expression of the effective permeability, in terms of resonant frequencies. The theo…
Metamaterials and Metasurfaces ApplicationsPhotonic Crystals and ApplicationsRandom lasers and scattering media
Igor L. Medintz、Kim E. Sapsford、J. H. Konnert 等 7 位作者2005-05-12Langmuir
This report describes two related methods for decorating cowpea mosaic virus (CPMV) with luminescent semiconductor nanocrystals (quantum dots, QDs). Variants of CPMV are immobilized on a substrate functionalized with NeutrAvidin using modifications of biotin-avidin binding chemistry in combination with metal affinity…
Quantum Dots Synthesis And PropertiesBacteriophages and microbial interactionsTransgenic Plants and Applications
W. A. Stygar、James A. Lott、T. C. Wagoner 等 29 位作者2005-05-12Physical Review Special Topics - Accelerators and Beams
We have conducted a series of experiments designed to measure the flashover strength of various azimuthally symmetric $45\ifmmode^\circ\else\textdegree\fi{}$ vacuum-insulator configurations. The principal objective of the experiments was to identify a configuration with a flashover strength greater than that of the st…
High voltage insulation and dielectric phenomenaLightning and Electromagnetic PhenomenaPulsed Power Technology Applications
Gabriela Petculescu、K. B. Hathaway、T. A. Lograsso 等 5 位作者2005-05-12Journal of Applied Physics
Elastic shear moduli measurements on Fe100−xGax (x=12–33) single crystals (via resonant ultrasound spectroscopy) with and without a magnetic field and within 4–300 K are reported. The pronounced softening of the tetragonal shear modulus c′ is concluded to be, based on magnetoelastic coupling, the cause of the second p…
Microstructure and Mechanical Properties of SteelsShape Memory Alloy TransformationsMagnetic Properties and Applications
Yufeng Hao、Guowen Meng、Changhui Ye 等 5 位作者2005-05-12The Journal of Physical Chemistry B
Orthogonally branched single-crystalline magnesium oxide nanostructures were synthesized through a simple chemical vapor transport and condensation process in a flowing Ar/O(2) atmosphere. Other morphologies, such as cubes and nanowires, can also be obtained under different controlled conditions. The formation of diff…
ZnO doping and propertiesElectronic and Structural Properties of OxidesMagnesium Oxide Properties and Applications