Dynamic Properties of the Transient Network formed by Telechelic Ionomers Studied by Dynamic Light Scattering and Dynamic Mechanical Analysis
peer reviewed
Materials Literature
文献浏览
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
L-735,334, a Novel Sesquiterpenoid Potassium Channel-Agonist from Trichoderma virens
A novel oleic acid ester of the carotane sesquiterpene 14-hydroxy CAF-603 was isolated from Trichoderma virens grown in a solid brown rice-based medium, a solid millet-based medium, or a mannitol-based liquid medium. Its structure was determined on the basis of ms and nmr analysis. It retains distinct biological activ…
Optics and electro-optics of polymer-dispersed liquid crystals: physics, technology, and application
A brief description of the basic optical and electro-optical effects observed in polymer-dispersed liquid crystals (PDLCs) is presented. Theoretical models of light scattering from such structures and measurement techniques of PDLC optical properties are included, based on which of the material properties of polymer a…
Spatial regulation of Drosophila Snake protease activity in the generation of dorsal-ventral polarity
Positional information along the dorsal-ventral axis of the Drosophila embryo is acquired through a signal transduction pathway which employs a extracellular protease cascade. The sequential activation of serine protease zymogens results in the ventrally localized production of a ligand in the perivitelline space of t…
Formation of Highly Stable Heterodimers in Aqueous Solution Between .beta.-Cyclodextrin Derivatives Bearing Multiple Opposite Charges
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFormation of Highly Stable Heterodimers in Aqueous Solution Between .beta.-Cyclodextrin Derivatives Bearing Multiple Opposite ChargesBertrand Hamelin, Ludovic Jullien, Frederique Guillo, Jean-Marie Lehn, Alain Jardy, Laurence De Robertis, and Hugues DriguezCite this: J. Phys…
Calculation of diffusion coefficients and correlation factors in grain-boundary diffusion
A random-walk approach is developed for tracer diffusion by a point-defect mechanism in grain boundaries with a periodic structure. Such boundaries are characterized by a finite spectrum of possible atomic jumps. The effective (macroscopically measured) diffusion coefficient is expressed in terms of the different jump…
Characterization of excited states of centrosymmetric and noncentrosymmetric squaraines by third-harmonic spectral dispersion
We measured the third-harmonic spectrum for each of four squaraine dyes in chloroform. By fitting the experimental dispersion of the third-order susceptibility, γ, to a four-level sum-over-states model, we determine the strength and the location of the lowest-lying two-photon-like transition. In each case, we find tha…
Analysis of the x-ray-absorption near-edge-structure spectra ofLa1−xNdxNiO3andLaNi1−xFexO3perovskites at the nickelKedge
We present here the experimental and theoretical analysis of the x-ray near-edge absorption spectra of LaNi${\mathrm{O}}_{3}$, NdNi${\mathrm{O}}_{3}$, ${\mathrm{Nd}}_{1\ensuremath{-}x}{\mathrm{La}}_{x}\mathrm{Ni}{\mathrm{O}}_{3}$, and $\mathrm{Nd}{\mathrm{Ni}}_{1\ensuremath{-}x}{\mathrm{Fe}}_{x}{\mathrm{O}}_{3}$ solid…
Pressure induced coordination change of Al in silicate melts from Al K edge XANES of high pressure NaAlSi2O6‐NaAlSi3O8 glasses
Aluminum K‐edge XANES spectra of high pressure and high temperature (4.4 GPa and 1575°C) glasses along the NaAlSi 2 O 6 (Jd)‐NaAlSi 3 O 8 (Ab) join are reported using synchrotron radiation, and shown to provide direct experimental evidence for the pressure‐induced coordination change of Al. Five‐ and six‐fold coordina…
The Effect of Combined Recrystallization and Precipitation Processes on the Functional and Structural Properties in NiTi Alloys
To obtain an optimum shape memory component, functional and structural properties have to be connected during fabrication. To fulfil these requirements thermomechanical treatments are used to generate favourable microstructures by "combined reactions". Combined reactions can be composed of recrystallization, precipita…
Microstructure and Nonohmic Properties of ZnO-V2O5 Ceramics
The microstructure and nonohmic characteristics of polycrystalline ZnO-V 2 O 5 ceramics with V 2 O 5 as the only additive ranging from 0 to 2 mol% were investigated. An abnormal grain growth was observed for ZnO doped with V 2 O 5 and sintered at 900° C. However, the non-uniformity of the grain structure alleviated wi…
Structural Study of Poly(phenylsilsesquioxane) Sol-Gel Materials
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructural Study of Poly(phenylsilsesquioxane) Sol-Gel MaterialsM. Smaihi, T. Jermoumi, and J. MarignanCite this: Chem. Mater. 1995, 7, 12, 2293–2299Publication Date (Print):December 1, 1995Publication History Published online1 May 2002Published inissue 1 December 1995https:…
Clay mineral evolution in the Illinois Basin and its causes
Abstract Samples from deep wells of the Palaeozoic Illinois Basin show the evolution of the illite-smectite (I-S) mineral transformation under low temperatures for very long periods of time. Curve decomposition of the XRD traces was used to identify and follow the evolution of the different clay minerals. All samples…
Synthesis and variable-temperature FTIR study of five chiral liquid crystals induced by intermolecular hydrogen bonding
Five new chiral liquid crystal systems induced by intermolecular hydrogen bonding between 4-[(s)-2-chloro-3-methyl]butyroyloxy-4′-stilbazole (MBSB, proton acceptor) and 4-alkoxybenzoic acids (nBA, proton donors) were prepared. Their liquid crystalline properties were investigated by DSC and polarized optical microscop…
Modeling of Epitaxial Silicon Thin‐Film Growth on a Rotating Substrate in a Horizontal Single‐Wafer Reactor
The effect of substrate rotation on transport of reactive gases and epitaxial growth rate is investigated for a horizontal single‐wafer reactor using a model and experiments. The governing equations for gas velocity, temperature, and chemical species transport are solved for the system for Si thin‐film preparation. Th…
Modeling of Branched Needle Microstructures at the Edge of a Martensite Laminate
Abstract. We present models of the microstructure of martensite that occurs when twinned layers of martensite meet a pure variant. This microstructure often occurs below the A, temperature, with loading that favors the passage from one pure variant of martensite to another. This microstructure gives a mechanism for va…
Crack-Bridging Force in Random Ductile Fiber Brittle Matrix Composites
The behavior of fiber-reinforced composites is governed by the crack-bridging force provided by the fibers, which can be obtained by the analysis of debonding and bending of fibers across a crack. In this paper, a micromechanical model for the analysis of crack-bridging force is developed. As fiber debonding has been…
Modification of polyethylene terephthalate (dacron) via denier reduction: Effects on material tensile strength, weight, and protein binding capabilities
Thrombosis remains a significant and potentially catastrophic complication of polyethylene terephthalate (Dacron) prosthetic vascular graft implantation. Numerous attempts have been made to create a novel surface that reduces the adverse effects of blood interaction with the material. The purpose of this study was to…
Stretching-Induced Correlations in Triblock Copolymer Gels As Observed by Small-Angle Neutron Scattering
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStretching-Induced Correlations in Triblock Copolymer Gels As Observed by Small-Angle Neutron ScatteringK. Reynders, N. Mischenko, K. Mortensen, N. Overbergh, and H. ReynaersCite this: Macromolecules 1995, 28, 25, 8699–8701Publication Date (Print):December 1, 1995Publication…
Strain coupling as the dominant interaction in structural phase transitions
A rigorous theory is developed for the ordering interaction J(R ij) in a crystal having a structural phase transition when J(R ij) is mediated by elastic relaxation in the material. The ordering process in cell i sets up a local stress field due to the sizes, shapes or displacements of atoms or atomic groups, which pr…