Materials Literature
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The viscosities of maple syrup, 0.32 ± 0.03 Pa s, molasses, 0.87 ± 0.09 Pa s, ketchup, 9.8 ± 1.0 Pa s, and smooth peanut butter, 1.2 ± 0.9 × 105 Pa s, were measured at 25 °C and 1 bar pressure for comparison with the viscosities of natural silicate melts to aid in teaching the importance of viscosity in igneous proces…
Very first test results obtained from an intrinsic single crystal CVD diamond detector are described and compared to those measured with polycrystalline CVD-diamond and HPHT Ib diamond sensors. The data are discussed in the context of the requirements of intermediate and high energy heavy-ion physics experiments. It i…
The refractory metals are mostly suitable material for fabricating first mirrors for plasma diagnostics in a fusion reactor. Their low sputtering yields under the impact of charge exchange atoms can guarantee long-term mirror operation. An important factor influencing the rate of mirror degradation and reproducibility…
High-speed vehicle structures have been of interest since the earliest days of aviation. Every since that fateful day at Kittyhawk, North Carolina, the quest for speed has been inseparable from the world of aviation. Some of the advances in structures technology are explored specifically for hypersonic flight vehicle…
Ferroelectric Bi 3.6 La 0.4 Ti 3 O 12 (BLT) and Mn-doped (0.1 wt%, 0.2 wt%, and 0.3 wt%) BLT thin films were prepared by sol-gel processing. In the X-ray diffraction (XRD) results, all films exhibited a randomly oriented perovskite phase. Concerning surface morphology, the grain boundaries of the Mn-doped (0.2 wt%) BL…
Transformation of Escherichia coli plays an important role in recombinant DNA technology. Most current transformation protocols require that the cells be treated to attain a particular physiological state known as "competence," and this makes transformation procedures lengthy and arduous. Here we describe a protocol f…
Abstract The metastable nanocrystalline γ form of gallium oxide has been prepared and its microstructure and thermochemistry have been studied for the first time by employing X-ray and electron diffraction, high-resolution transmission electron microscopy, adiabatic and differential scanning calorimetry. The randomly…
Some technological parameters of ostrich skins and leathers, which are considered to be important in the leather industry, were analysed. It was observed that these parameters vary according to whether skin comes from the neck, leg and back sides. However, on the basis of area and strength values, leg and back sides a…
3-[ω-(p-methoxyphenoxy)alkyl] thiophenes were synthesized and electrochemically polymerized on ITO/glass electrodes by the potentiostatic method. Short alkyl chains substituted thiophene derivatives are generally difficult to polymerize by electrochemical methods, however, potentiostatic deposition provided h…
This paper presents partial-discharge (PD) analysis as a tool for predictive maintenance for medium-voltage switchgear systems. PD analysis is the newest technology being applied to MV electrical equipment and can detect corona or surface tracking behind metal barriers. This online PD monitoring proved that the equipm…
ABSTRACT The photodynamic activities of novel asymmetrically meso substituted cationic porphyrins, 5,10‐di(4‐methylphenyl)‐ 15,20‐di(4‐trimethylammoniumphenyl)porphyrin iodide 1 and 5‐(4‐trifluorophenyl)‐10,15,20‐tris(4‐trimethylammoniumphenyl)porphyrin iodide 2 and its metal complex with Pd(II) 3, have been investiga…
The influence of γ-irradiation on the electrical, swelling and mechanical properties of cross- linked butyl (IIR) rubber and ethylene propylene diene monomer (EPDM) and their blends have been investigated. The modulus increased, while the elongation at break decreased with irradiation. The gap width between carbon-car…
The compounds of interest in the present study were the natural compounds rutin and quercetin, which are strong antioxidants and have beneficial effects on human health (Myake & Shibamoto, 1997). They are present in everyday foods and beverages and in this way they are used as an integral part of human diet. Therefore…
The origin of the phenomenon of stress oscillation during step-wise stretching at room temperature for amorphous poly(ethylene terephthalate) (PET) was investigated using vibrational spectroscopy. For the first time, transmission Fourier transform infrared (FT-IR), attenuated total reflection (ATR) FT-IR, and micro-Ra…
Abstract The first part of this series of papers indicated that the melt stabilization performance of phenol/phosphite/metal stearate combinations in metallocene LLDPE (mLLDPE) was influenced by the purity of the fatty acid salt. In this second part, it is shown that the quality of the metal stearate has a direct infl…
A three-dimensional (3D) model for the simulation of the thermoplastic pultrusion process is developed. The simulation procedure and algorithms are based on the Finite Element–Nodal Control Volume (FE–NCV) approach. For illustration purposes, APC-2 CF–PEEK is used as a candidate material along with multiheater steel d…
Abstract The diimide hydrogenation of natural rubber (NR) was studied by using p ‐toluenesulfonylhydrazide (TSH) as a diimide‐releasing agent. The microstructure and the percentage of hydrogenation were studied by Raman, 1 H‐NMR and 13 C‐NMR spectroscopic techniques. Quantitative measurements on fraction of hydrogenat…
Electrically tunable laser action has been demonstrated in a dye-doped nematic liquid-crystal (NLC) waveguide by holographic excitation. The optical feedback was provided by the distributed feedback induced by two-beam interference by use of the Lloyd mirror configuration. Electrical tuning of the lasing wavelength wa…
A novel dynamic electrochemical impedance spectroscopy (DEIS) technique has been developed that offers the possibility to determine impedance characteristics in a time domain during the rupture of the protective passive layer. This ability is associated with the analysis methodologyof the technique, which enables sele…
Electrostatic charges are responsible for a variety of problems in industrial processes and customer equipment that use webs or sheets. Problems include particle contamination from attracting dust, sheets that stick to each other, and electrical discharges resulting in logic resets or damage to electrical components.…