Materials Literature
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We have used adsorption isotherms to study ethane films on bundles of purified HiPco single-walled carbon nanotubes (SWNTs). We infer the existence of a possible phase transition in this system from a sudden change in the temperature dependence of the coverage interval corresponding to a feature present in the isother…
A simple constitutive model of shape memory alloys for analyses of tension—compression quasiplastic behavior is derived. Here, three martensitic variants are considered; namely, thermal-induced, tensile stress-induced, and compressive stress-induced martensitic variants. Reorientation from one variant to another varia…
Abstract Big blue stem grass fiber‐reinforced high density polyethylene powder biocomposites were fabricated using two separate processing schemes: (1) by compounding biofiber with the thermoplastic powder in an extruder and subsequently injection molding the extrusion pellets and (2) by combining biofiber and the pow…
Boron coordination compounds with a roof-shaped morphology (see structure) exhibit unusual liquid-crystalline behavior with a transition (represented by the red arrow) from a nematic mesophase with similar characteristics to those of some bent-core liquid crystals to a compact lamellar phase with a chiral organization…
The incorporation of polymeric scaffolds in tissue regeneration occurred in the early 1980s, and it continues to play a vital role in tissue engineering [1-3]. The function of a degradable scaffold is to act as a temporary support matrix for transplanted or host cells so as to restore, maintain, or improve tissue. Sca…
The features of the low-temperature (300–600 K) oxidation process by ozone are examined. The process is modeled employing “full” chemistry and simulated in a perfectly stirred reactor (PSR). The issues addressed include the rate of multi-pollutant of flue gas removed by the process, the critical temperature window, th…
Eine Nanotemplatoberfläche, die als regelmäßige Anordnung von Molekülfallen z. B. für Naphthalocyanin fungiert (siehe Bild), ist das Nanogitternetz von hexagonalem BN auf Rh(111), das als eine einzelne, vollständige Monoschicht identifiziert wurde. Die 2 nm großen Poren bilden sich dort, wo die Monoschicht fest an den…
Barium strontium titanate (Ba 0.6 Sr 0.4 TiO 3 , BST) thick films and ceramics with a concrete‐like structure were fabricated by a novel sol–gel‐based route. In this process, well‐crystallized nano‐sized or micrometer‐sized BST powders or their combinations are dispersed into a sol–gel matrix. Crack‐free thick films a…
Well-aligned zinc oxide microrod and microtube arrays with high aspect ratios were fabricated on zinc foil by a simple solution-phase approach in an aqueous solution of ethylenediamine (en). The shape of the ZnO microstructures can be easily modulated from rods to tubes by adding cetyl trimethyl ammonium bromide (CTAB…
We investigated relations between magnetic and crystallographic domains in a single crystal of an ordered double perovskite, ${\mathrm{Ba}}_{2}\mathrm{Fe}\mathrm{Mo}{\mathrm{O}}_{6}$, by means of transmission electron microscopy. By direct observation of the magnetic domain and antiphase domain structures, we demonstr…
본 연구에서는 아토피 피부염 동물 모델인 NC/Nga mice에 실크단백질 sericin과 fibroin을 식이 공급 후 피부의 세라마이드 함량 및 관련인자 발현 변화를 정상대조군인 BALB/c mice 및 아토피 피부염 대조군과 비교?분석하였다. 세라마이드 함량은 아토피 대조군인 CA군이 정상대조군 C군보다 현저히 낮았으나, 정제된 건조 분말을 별다른 처리 없이 그대로 실크단백질 sericin을 식이공급한 S군은 정상대조군인 C군 이상의 수준으로 높였으며, 실크단백질 fibroin(F군)은 세라마이드 함량을 정상대조군 수준이상으로 올려주지는 못하였다. 세라마이드…
Abstract Polyglycolic acid (PGA) fibers were prepared by melt‐spinning process in this report. The effects of spinning parameters, such as windup rates and drawn ratio, on the mechanical properties of the fibers were discussed by analyzing the internal stress of as‐spun fibers, axial sound velocity, fiber tenacity, et…
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Abstract The functionalized triblock polymer for the preparation of self‐assembly biomaterials, Chol‐(CL) n ‐Chol, was synthesized through ring‐opening polymerization of ε‐caprolactone (ε‐CL) following by chain‐extension reaction. The chemical structure of functionalized triblock polymer was confirmed by Fourier trans…
Abstract In this article, our self‐designed pan mill equipment was used to pulverize high‐density polyethylene (HDPE) to prepare its powder product. This pan mill based on three‐dimensional shear forces shows much better pulverization effects on ductile polymer materials when compared with conventional pulverizing equ…
We study the Euclidean effective action per unit area and the charge density for a Dirac field in a two-dimensional (2D) spatial region, in the presence of a uniform magnetic field perpendicular to the 2D plane, at finite temperature and density. In the limit of zero temperature we reproduce, after performing an adequ…
The interaction of water with adsorbed methanol and butane is investigated and the crystallization mechanism of deeply supercooled water is discussed. Amorphous solid water becomes viscous liquid at temperatures greater than $136\phantom{\rule{0.3em}{0ex}}\mathrm{K}$, and then a more fluidized liquid phase appears at…
Abstract Photoluminescence in visible range of spectra from nanohills formed on a surface of Ge single crystal by JAG:Nd laser radiation was found. This photoluminescence is explained by quantum confinement effect in quantum dots on a top of nanohills. Red shift of 300 cm –1 line micro‐Raman back scattering spectrum i…
Abstract A novel experimental technique to follow the crystallization processes of poly(propylene)/MWCNT composites that experience a steady shear deformation using dynamic melt rheometry is described. The effects of heterogeneous nucleation, temperature, and preshear on the crystallization behaviors were determined.…
Abstract Polyurethane foam formation involves simultaneous polymerization and expansion. In an open cell foam, foam lamellae rupture at some stage of foam formation, resulting in a foam with continuous air channels. Experiments are carried out to study the effect of initial temperature of monomers on the open cell con…