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Study on composition and characteristics of maleated ethylene‐octene copolymer prepared by reactive extrusion on the morphology and properties of polyamide 6/ethylene‐octene copolymer blends

K. Premphet‐Sirisinha、S. Chalearmthitipa2003-02-01Polymer Engineering and Science

Abstract Blends of polyamide 6 (PA6) and elastomeric ethylene‐octene copolymer (EOR), with and without maleated EOR (EOR‐MA) were studied. EOR‐MA with various amounts of grafted MA and gel content were prepared by reactive extrusion. The effects of EOR‐MA characteristics and composition on the morphology, thermal and…

Polymer crystallization and propertiesPolymer Nanocomposites and Propertiesbiodegradable polymer synthesis and properties

Achromatic liquid crystal polarization modulator

D. Gisler、A. Feller、A. Gandorfer2003-02-01Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE

The design of an achromatic polarisation modulator is presented. The modulator is based on a combination of three electrically switchable non-achromatic ferroelectric liquid crystal retarders. The design follows the idea by Pancharatnam who first introduced suitable achromatic combinations of crystal retarders. We com…

Photonic and Optical DevicesLiquid Crystal Research AdvancementsOptical Polarization and Ellipsometry

Hydrogen in novel solid-state metal hydrides

K. Yvon2003-02-01Zeitschrift für Kristallographie - Crystalline Materials

Abstract Solid-state metal hydrides display hydrogen densities close to that of liquid hydrogen and thus provide a safe and efficient way of storing hydrogen. As a result of recent neutron and synchrotron diffraction work some novel metal hydrides have been characterized that shed new light on the nature of metal-hydr…

Hydrogen Storage and MaterialsAmmonia Synthesis and Nitrogen ReductionMuon and positron interactions and applications

Flux Synthesis of the Noncentrosymmetric Cluster Compounds Cs2SnAs2Q9 (Q = S, Se) Containing Two Different Polychalcoarsenite β-[AsQ4]3- and [AsQ5]3- Ligands

Ratnasabapathy G. Iyer、Junghwan Do、Mercouri G. Kanatzidis2003-02-01Inorganic Chemistry

Two noncentrosymmetric quaternary tin chalcoarsenates, Cs(2)SnAs(2)S(9) (1) and Cs(2)SnAs(2)Se(9) (2), were synthesized by the polychalcoarsenate flux method. Compound 1 crystallizes in the orthorhombic space group Pmc2(1) with a = 7.386(3) A, b = 14.614(5) A, c = 14.417(5) A, and Z = 4. Compound 2 crystallizes in the…

Crystal Structures and PropertiesSolid-state spectroscopy and crystallographyOrganometallic Compounds Synthesis and Characterization

Precipitation of crystalline neptunium dioxide from near-neutral aqueous solution

Κ. Roberts、Thomas J. Wolery、C. Atkins-Duffin 等 9 位作者2003-02-01Radiochimica Acta

Abstract We report experimental evidence that crystalline neptunium dioxide, NpO 2 (cr), will precipitate from near-neutral aqueous solutions that initially contain NpO 2 + (aq), even under mildly oxidizing conditions. Observed decreases in aqueous Np concentrations with time are balanced by corresponding decreases in…

Nuclear reactor physics and engineeringNuclear Materials and PropertiesNuclear materials and radiation effects

Modification of Split-Thickness Skin Graft: Cosmetic Donor Site and Better Recipient Site

Tiem Chuenkongkaew2003-02-01Annals of Plastic Surgery

The author reports an alternative method of caring for the donor sites of split-thickness skin graft that involves the immediate return of superficial thin-layer split skin graft to the donor sites while using the deep split-thickness skin graft for replacement over the defects. The proposed method would decrease the…

Electrospun Nanofibers in Biomedical Applications

Biomacromolecules and Bio‐Related Macromolecules

Shiro Kobayashi、Hiroshi Uyama2003-02-01Macromolecular Chemistry and Physics

Abstract The present article briefly reviews research developments in the area of biomacromolecules and bio‐related macromolecules, whose research papers have been published for several decades preferably in the Macromolecular Journals. The area covers the important classes of macromolecules, polysaccharides (cellulos…

Enzyme Catalysis and Immobilizationbiodegradable polymer synthesis and propertiesClick Chemistry and Applications

Fission Products Release from Irradiated FBR MOX Fuel during Transient Conditions

Isamu Sato、Toshio Nakagiri、Takashi Hirosawa 等 5 位作者2003-02-01Journal of Nuclear Science and Technology

Out-of-pile experiments on the release of fission products (FPs) under transient heating conditions were carried out for mixed oxide fuels. The fuels used in the experiments, the plutonium content of which was 30 wt%, were irradiated up to 65 GWd/t in the experimental fast reactor JOYO. The experiments consisted of tw…

Nuclear reactor physics and engineeringRadioactive element chemistry and processingNuclear Materials and Properties

RAG1-DNA Binding in V(D)J Recombination

Mihai Ciubotaru、Leon M. Ptaszek、Gary A. Baker 等 6 位作者2003-02-01Journal of Biological Chemistry

The RAG1 and RAG2 proteins together constitute the nuclease that initiates the assembly of immunoglobulin and T cell receptor genes in a reaction known as V(D)J recombination. RAG1 plays a central role in recognition of the recombination signal sequence (RSS) by the RAG1/2 complex. To investigate the parameters govern…

DNA Repair MechanismsMetabolism and Genetic DisordersEnzyme Structure and Function

The determination of anharmonic probability densities from static and dynamic disorder by neutron powder diffraction

H. Boysen2003-02-01Zeitschrift für Kristallographie - Crystalline Materials

Abstract Atomic probability densities as derived from a careful analysis of the Debye-Waller factors contain important information about the average static and dynamic disorder in crystals. Although the inclusion of anharmonic terms often requires single crystal data, in favourable cases, in particular at high tempera…

High-pressure geophysics and materialsNuclear materials and radiation effectsX-ray Diffraction in Crystallography

Purification of lysozyme from other hen's‐egg‐white proteins using metal‐affinity precipitation

Ipsita Roy、Mukkavilli V. S. Rao、Munishwar Nath Gupta2003-02-01Biotechnology and Applied Biochemistry

It was found that the presence of 5 mM Cu(2+) caused precipitation of protein present in hen's egg white to a large extent. About 85% of lysozyme activity remained in the supernatant and the enzyme was purified by approx. 13-fold. A further gel-filtration step on Sephadex G-75 resulted in an overall yield of 80% for t…

Proteins in Food SystemsEnzyme Structure and FunctionProtein Hydrolysis and Bioactive Peptides

Novel Radical Compounds Bearing Mesogenic Cores with Long Alkyl Substituents

Shin’ichi Nakatsuji、Hiroshi Ikemoto、Hiroki Akutsu 等 5 位作者2003-02-01The Journal of Organic Chemistry

Series of aminoxyl radicals (TEMPO or nitronyl nitroxide radicals) bearing phenyl benzoate, troponoid, or biphenylcarbonitrile as mesogenic cores with long alkyl substituents were prepared. Although most aminoxyl radicals showed only weak antiferromagnetic interactions due probably to the remote spin centers as clarif…

Magnetism in coordination complexesLanthanide and Transition Metal ComplexesElectron Spin Resonance Studies

Relação entre atributos físicos, mineralogia da fração argila e formas de alumínio no solo

A. Pedrotti、M. M. Ferreira、Nilton Curi 等 6 位作者2003-02-01Revista Brasileira de Ciência do Solo

O alumínio (Al) é um dos elementos mais abundantes em massa nos solos brasileiros, estando presente em diferentes minerais e formas. Considerando a carência de informações sobre a sua participação no comportamento físico do solo, buscou-se, no presente estudo, avaliar a relação entre a mineralogia da fração argila, fo…

Clay minerals and soil interactionsIron oxide chemistry and applicationsSoil Management and Crop Yield

Evaluating Wool Shirt Comfort with Wear Trials and the Forearm Test

G. Wang、W. Zhang、R. Postle 等 4 位作者2003-02-01Textile Research Journal

The comfort of light-weight woven fabrics in the form of next-to-skin clothing is investigated by wear trials and the forearm test. The wear trial in neutral environmental conditions shows that light-weight wool and wool blend fabrics are generally less comfortable than the summer polyester, cotton poplin, and polyest…

Thermoregulation and physiological responsesDyeing and Modifying Textile FibersTextile materials and evaluations

Mechanical behavior of a semicrystalline polymer before necking. Part II: Modeling of uniaxial behavior

N. Brusselle‐Dupend、D. Lai、X. Feaugas 等 5 位作者2003-02-01Polymer Engineering and Science

Abstract Based on the experimental mechanical characterization presented in Part I of this paper, a model allowing the prediction of the behavior of the studied semicrystalline polymer in the pre‐necking domain was constructed. The modeling of the viscoelastoplastic behavior of polypropylene (PP) was described by part…

Mechanical Behavior of CompositesPolymer crystallization and propertiesPolymer Nanocomposites and Properties

Another step toward understanding the true nature of sartorite: Determination and refinement of a ninefold superstructure

Peter Berlepsch、Thomas Armbruster、Emil Makovicky 等 4 位作者2003-02-01American Mineralogist

Single-crystal X-ray diffraction data, collected from a sartorite crystal from Lengenbach (Binntal, Valais, Switzerland), yielded a ninefold superstructure: space group P2 1 /c; a = 37.71(2), b = 7.898(3), c = 20.106(8) Å, β = 101.993(7)°; R 1 = 6.08% for 6293 reflections with I > 2σ I . The sample is an N 1,2 = 3,…

High-pressure geophysics and materialsCrystal Structures and PropertiesMineralogy and Gemology Studies

Breakdown voltages of polymers in the temperature range 23°-250°C

G. R. Govinda Raju、A. Katebian、S.Z. Jafri2003-02-01IEEE Transactions on Dielectrics and Electrical Insulation

The direct voltage electric strengths of several polymers are measured using a new type of environmental chamber in which a new specimen of the material can be introduced without the necessity of cooling and reheating after every voltage application. The range of temperatures at which investigations are carried out is…

High voltage insulation and dielectric phenomenaLightning and Electromagnetic PhenomenaSmart Materials for Construction

Application of the Christensen‐Lo Model to the Reinforcement of Elastomers by Fractal Fillers

Guido Raos2003-02-01Macromolecular Theory and Simulations

Abstract This paper is concerned with the development of a hydrodynamic model for the reinforcement of rubber by colloidal fillers such as silica and carbon black. Each fractal aggregate is replaced by an equivalent effective sphere, and the reinforcing ability of the latter is estimated using the Christensen‐Lo solut…

Polymer crystallization and propertiesPolymer Nanocomposites and PropertiesComposite Material Mechanics

MEASUREMENTS OF ACCELERATOR-PRODUCED LEAKAGE NEUTRON AND PHOTON TRANSMISSION THROUGH CONCRETE

Kenneth R. Kase、W.R. Nelson、A. Fassò 等 7 位作者2003-02-01Health Physics

Optimum shielding of the radiation from particle accelerators requires knowledge of the attenuation characteristics of the shielding material. The most common material for shielding this radiation is concrete, which can be made using various materials of different densities as aggregates. These different concrete mixe…

Radiation Therapy and DosimetryRadiation Shielding Materials AnalysisGraphite, nuclear technology, radiation studies

Ballistic Conduction in Multiwalled Carbon Nanotubes

Claire Berger、P. Poncharal、Yan Yi 等 4 位作者2003-02-01Journal of Nanoscience and Nanotechnology

The electrical transport in multiwalled carbon nanotubes is shown to be ballistic at room temperature with mean free paths on the order of tens of microns. The measurements are performed both in air and in the transmission electron microscope by contacting the free end of a nanotube pointing out of a fiber to a liquid…

Carbon Nanotubes in CompositesGraphene research and applicationsForce Microscopy Techniques and Applications