Materials Literature
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The compositions of the hydrodistilled leaf oils of seven Pittosporum species, which are endemic to New Zealand, were examined by GC/MS. Their composition divided the species into two groups. The oils from the first group (P. crassifolium, P. fairchildii, P. tenuifolium and P. umbellatum) contained sesquiterpenes, whi…
We report on the electron spin resonance characterization of dominant paramagnetic defects created in pure diamond by neutron irradiation followed by annealing at temperatures above 1150 °C. Along with the previously reported R7, R8, R10a, and R12 centers, two extra S = 1 centers, labeled as R7a and KUL13, and two S =…
Growth and morphological evolution of hexapod-shaped Cu 2 O microcrystals is carefully studied via a γ-irradiation reduction route at room temperature and under ambient pressure. The products are examined by means of XRD patterns and FE-SEM images. The as-obtained hexapod-shaped Cu 2 O microcrystal is composed of six…
Plasma-sprayed MnZn ferrite thick films are built up by splats, which consist of columnar grains with diameter /spl sim/200 nm and height /spl sim/1 /spl mu/m. The existence of the conductive wustite FeO in the as-sprayed films greatly reduces the dc resistivity. However, a useful structure can be developed in these f…
New strategies were developed which incorporate silica nanoparticles (<30 nm) into a nylon‐6 matrix, to form technically interesting hybrid nanocomposites with improved stiffness. Silica particles retained their original shape and size (10–30 nm), are mono‐dispersed and mainly non‐agglomerated as shown by TEM. Mech…
Abstract In‐situ polymerization is the polymerization of one monomer in the presence of another polymer. It can be performed by sequential emulsion polymerization, or by reactions in the melt, in the solid phase, or in solution. The current report describes two methods to obtain poly(vinyl chloride) (PVC) modification…
Proper selection of the power conversion cycle is a very important step in the design of a nuclear reactor. Due to the higher core outlet temperature (˜550°C) compared to that of light water reactors (˜300°C), a wide portfolio of power cycles is available for the lead alloy fast reactor (LFR). Comparison of the follow…
Abstract The influence of metal stearates on the melt stabilization performance of combinations of phenolic and phosphite antioxidants in a metallocene LLDPE (mLLDPE) has been investigated. This study focused on the effect of both the origin of the stearine blend (i.e., vegetable or animal) used in the formation of th…
We have studied the optimal cell configuration for a fringe-field driven transflective liquid crystal display that exhibits high image quality. The cell is composed of two half-plate compensation films, liquid crystal, and two parallel polarizers in the transmissive region. Viewing angle characteristics of the device…
Abstract The biodegradation of electrospun nano‐fibers of poly( ϵ ‐caprolactone) was firstly investigated, using pure‐cultured soil filamentous fungi. In the biochemical oxygen demand test, the biodegradation of the nano‐fiber exceeded 20‐30% carbon dioxide generation. The biodegradabilities decrease with increase of…
The so-called “fish-mouth actuator”, developed at DLR in the framework of the Adaptive Wing project (ADIF), is a compact hybrid actuator based on the interaction of a shape memory material and a composite flexible mechanism. The actuator offers a high effective strain (ratio between actuator’s stroke and mounting dime…
The new kind of inherent (interstitial) sub-structure of liquid D 2 O under high pressure up to 300 MPa, compared to those found under ambient liquid conditions (5−85 °C) and for D 2 O ice Ih (−10 °C), have been revealed by using of difference and double-difference near-infrared O−D stretching overtone spectroscopy an…
Biomimetic oxidation of unactivated carbons for structurally different steroids was studied with a model of cytochrome P-450, oxorutheniumporphyrinate complex, which is generated in situ by 2,6-dichloropyridine N-oxide as an oxygen donor and (5,10,15,20-tetramesitylporphyrinate) ruthenium(II) carbonyl complex and HBr…
The electro-optical (EO) properties, film structures and far-infrared spectra were measured for lanthanum-modified lead zirconate titanate [PLZT, Pb 0.91 La 0.09 (Zr 0.65 Ti 0.35 )O 3 ] and lead titanate [PT, PbTiO 3 ] films, prepared by the aerosol deposition (AD) method. The EO response appeared for AD films anneale…
Americanae nace como un proyecto conjunto que surge dentro de la Red Europea de Información y Documentación sobre América Latina (REDIAL), y que ha afrontado la Biblioteca de la Agencia Española de Cooperación Internacional para el Desarrollo (AECID). Esta nueva biblioteca virtual hace más accesibles los libros digita…
Abstract Crystallization of thin polypropylene films was performed in isothermal, constant cooling-rate and mixed conditions. The experiments were first analyzed using the classical procedures based on simplified forms (Avrami, Ozawa) of the general Kolmogoroff-Avrami-Evans (KAE) theory. These analyses, which can be a…
Submicron and nano-sized nanocrystalline pure zirconia (ZrO2) powders having metastable tetragonal and tetragonal-plus-monoclinic crystal structures, respectively, were synthesized using the sol-gel technique. The as-precipitated and the calcinated ZrO2 powders were analyzed for their morphology, nanocrystallite size…
We report the formation of bamboo-shaped carbon-nitrogen nanotubes by employing a simple, one-step and economically viable spray pyrolysis technique using new precursor; acetonitrile and ferrocene solution. By varying the concentration of ferrocene with respect to acetonitrile, it has been found that the optimum conce…
The crystallization behaviors of polyamide-6 (PA-6) and its nanocomposites undergoing the microcellular injection molding process are studied using Transmission Electron Microscopy (TEM), X-ray Diffractometer (XRD), Polarized Optical Microscopy (POM), and Differential Scanning Calorimetry (DSC). The relationships amon…
This paper addresses the stress corrosion cracking (SCC) and subsequent corrosion fatigue cracking (CFC) behavior of a heat-treated duplex stainless steel (DSS) in paper-machine white waters containing chloride and thiosulfate ions. According to the potentiodynamic and slow strain rate tests (SSRT) carried out in this…