Materials Literature
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。
Abstract Blends of synthetic poly(propylene carbonate) (PPC) with a natural bacterial copolymer of 3‐hydroxybutyrate with 3‐hydroxyvalerate (PHBV) containing 8 mol % 3‐hydroxyvalerate units were prepared with a simple casting procedure. PPC was thermally stabilized by end‐capping before use. The miscibility, morpholog…
Abstract The concept of physical crosslinking was introduced into the research field of oil‐absorption resins, which were traditionally synthesized only by chemical crosslinking. Specifically, the partially physical crosslinking acrylic series for high‐oil‐absorption resins were prepared in the suspension process, and…
Abstract Diarylethenes with long π-conjugated heteroaryl groups were synthesized and their absorption spectra, photocyclization and cycloreversion quantum yields, and thermal stability were examined. The diarylethene with isopropyl groups at the reactive carbons was found to have a low decoloration quantum yield and t…
<div class="htmlview paragraph">Ammonia is a potential alternative fuel that was indeed put into use in Belgium in World War II due to the extreme shortage of diesel. It has a high heating value per unit volume (1.16 × 10<sup>7</sup> kJ/m<sup>3</sup>) and its combustion products can be as…
We consider generalizations of the classical symmetrical Bruggeman equation based on the concept of shape-distributed particle systems. The use of the Beta distribution for the particle shape is shown to result in some known as well as unknown equations of the effective medium theory. However, these equations yield no…
INTRODUCTION NOTES: Absorbable/Biodegradable Polymers: Technology Evolution. DEVELOPMENT AND APPLICATIONOF NEW SYSTEMS: Segmented Copolyesters with Prolonged Strength Retention Profiles. Polyaxial Crystalline Fiber-Forming Copolyester. Polyethylene Glycol-Based Copolyesters. Cyanoacrylate-Based Systems as Tissue Adhes…
We propose and theoretically analyze a novel metal-oxide-semiconductor field-effect-transistor (MOSFET) type of spin transistor (hereafter referred to as a spin MOSFET) consisting of a MOS gate structure and half-metallic-ferromagnet (HMF) contacts for the source and drain. When the magnetization configuration between…
Hysteresis has been observed in de Haas-van Alphen measurements of the Condon domains in silver, and it shows the first-order nature of the transition to the domain state. The hysteresis, and thus the first-order nature, is manifested in a nonlinear effect where a double-valued response of the amplitude with the appli…
The magnetic properties of the weak itinerant ferromagnet ZrZn_2 are analyzed using Landau theory based on a comparison of density functional calculations and experimental data as a function of field and pressure. We find that the magnetic properties are strongly affected by the nearby quantum critical point, even at…
Three-dimensional nanostructures can be fabricated by the glancing angle deposition technique. By rotating the substrate in both polar and azimuthal directions, one can fabricate desired nanostructures, such as nano-rod arrays with different shapes, nano-spring arrays, and even multilayer nanostructures. This method o…
The paper was withdrawn by the authors, due to an error in interpretation by Weissman. There is a first-order jump, but it's intrinsically a non-equilibrium thermal instability effect.
Abstract Different formulations of biodegradable starch–polyester blend nanocomposite materials have been film blown on a pilot scale film blowing tower. The physical properties of different films have been examined by thermal and mechanical analysis and X‐ray diffraction. The results show that the addition of an orga…
\ensuremath{\gamma}-alumina $(\ensuremath{\gamma}\ensuremath{-}{\mathrm{Al}}_{2}{\mathrm{O}}_{3})$ derived from boehmite has historically been described as having a cubic spinel structure with $\mathrm{Fd}3\ifmmode\bar\else\textasciimacron\fi{}m$ symmetry, despite reports of tetragonal distortion in the structure. Bas…
We present the first principles results of point defect energetics in silicon calculated using the LDA+U method: a Hubbard type on-site interaction added to the local density approximation (LDA). The on-site Coulomb and exchange parameters were tuned to match the experimental band gap in Si. The relaxed configuration…
We have investigated the kinetics of the acid-catalyzed hydrolysis of ethyl, propyl, and butyl acetates in aqueous binary mixtures of ethanol and of 1,4-dioxane without sonication and under ultrasound at 22 kHz. Various rate enhancements were found in the region from pure water up to 50 wt % ethanol and 60 wt % dioxan…
ADVERTISEMENT RETURN TO ISSUEPREVAddition/CorrectionNEXTORIGINAL ARTICLEThis notice is a correctionMolecular Logic: A Half-Subtractor Based on Tetraphenylporphyrin [J. Am. Chem. Soc. 2003, 125, 11198−11199]. Steven J. Langford and Trevor YannCite this: J. Am. Chem. Soc. 2003, 125, 48, 14951Publication Date (Web):Octob…
Thermodynamic properties of bovine pancreatic trypsin inhibitor (BPTI) hydrated by up to 1600 water molecules, i.e., a ratio of the weight of water to that of protein, h, from 0 to ∼4.5, are studied by molecular dynamics (MD) simulation and normal-mode analysis (NMA). Temperatures range from 100 to 300 K to include th…
Particle size control is of great importance to the pharmaceutical industry and is a key factor in product performance. Mechanical size reduction methods have some significant drawbacks. Sonocrystallisation, the use of power ultrasound in crystallisation, is a method of generating particles of controlled size, and thi…
We have developed a general method for aligning anisotropic materials by using carbon nanotubes to influence order in the surrounding material. Specifically, we have shown that carbon nanotubes seed the formation of oriented domains in a liquid crystalline polymer (LCP). Using polarized light microscopy, we have obser…
cyclicpoly(butylene terephthalate) oligomers, c-PBT, weresuccessfully polymerized to a high molecular weightPBT employing the advantages of the low viscosity (17cP) of c-PBT oligomers and lack of chemical emissionsduring polymerization. In this research, we intend toascertain the possibility of producing high-performa…