Materials Literature
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The Kerr electro-optic field mapping technique has been used to study space charge effects in HV pulsed propylene carbonate (C/sub 4/H/sub 6/O/sub 3/) using stainless steel parallel-plane, aluminum blade-plane, and aluminum point-plane electrodes. Measurements presented here were taken using a circular polariscope wit…
Sb 2 Te 3 and its solid solutions with group III elements such as In are materials of current interest for their potential thermoelectric applications. Single crystals of Sb 2 Te 3 and In 0.2 Sb 1.8 Te 3 have been grown by the Bridgman method and their powder X-ray diffractograms obtained and indexed. The transport pr…
The nonlinear electrical behavior and dielectric properties of TiO2-based ceramics with various WO3 contents have been investigated. It was found that 0.25% WO3+99.75% TiO2 has an optimal nonlinear coefficient of α=9.6, a breakdown electrical field of 44.5 V/mm, and ultrahigh relative dielectric constant of 7.41×104 (…
Abstract Partially 13 C-labeled alkali dicyanoaurates M[Au(CN) 2 ] were prepared and investigated by NMR and IR spectroscopy in aqueous solution. For the range of concentration investigated the data obtained under standard conditions provided no evidence for anion association. The salt [Ph 3 PNPPh 3 ][Au(CN) 2 ] was a…
A simple one-dimensional meta-material which exhibits negative permeability within a finite frequency band is proposed in this paper. Instead of recently introduced split-ring resonators, this structure comprises an array of the capacitively loaded small loop antennas. Due to resonant behaviour of the antenna current,…
This document provides guidelines for selecting suitable tabbing configurations for composite material test specimens. Additionally, a practical methodology is detailed for preparing and applying tabs to composite test specimens. This document is based on research performed within the Mechanical Engineering Department…
Isomerically pure samples of α1-P2W17O61M were prepared, in which M represents CaII and mainly the first-row transition metal cations: MnII, FeIII, CoII, NiII, CuII, ZnII. The formula is α1-P2W17O62M for VV and MoVI. The compounds were characterised by elemental analysis, IR, UV/Vis and 31P NMR spectroscopy. The stabi…
The formation of pentagonal defects and bamboo-like structures in carbon nanotube (NT) growth is viewed within the framework of the surface diffusion (SD) growth model. NT open edge stability is considered as a competition between: (i) hexagon formation which depends on the rate at which C units are fed by SD to the e…
This article surveys the physiological impact of waterproof textiles on the wearers of protective clothing. Wearer trials with test subjects in a climatic chamber involve ambient temperatures of +20. 0, and -20°C. The physiological function of breathable materials in comparison to a water vapor impermeable constructio…
A new series of liquid crystalline main chain copolyesters were prepared, having ferrocene in the mesogenic segment and a methyl phosphate group along with a methylene spacer. The even numbered methylene groups were varied from two to ten. Liquid crystalline behaviour was investigated on a hot stage optical polarized…
The electrochemical dissolution behaviour of armco-iron and of the steels C15, C45, C60 and 100Cr6 in concentrated sodium chloride media has been investigated. Anodic metal dissolution experiments have been carried out using the flow channel cell (parallel plate reactor), the rotating cylinder electrode (RCE) and the…
Chemical vapour deposition (CVD) diamond is known for its excellent chemical, mechanical and thermal properties, as well as low or negative electron affinity. These unique characteristics make CVD diamond a good material as an electron emitter. In this study, electron field emission has been measured from nano-, submi…
Abstract Volcanic tuff from the Cabo de Gata region in Almería, southeastern Spain, was altered under hydrothermal conditions at different temperatures (60 to 180°C), reaction times (60 to 360 days), and reacting solutions (deionized water and NaCl and KCl solutions with Na/K ratios from 0.01 to 100, and a total salt…
Li has been theoretically predicted to be a shallow donor in diamond in interstitial sites. Many experimental works have investigated the possibility to incorporate Li into diamond to obtain n-type electrical conductivity related to Li doping. The results of these researches are somewhere inconsistent. In this work, t…
E25 has been applied in our studies in order to find optimal culture conditions for effective bacterial cellulose (BC) production. The strain displays significantly higher stability in BC production under stationary culture conditions. In contrast, intensive agitation and aeration appear to drastically reduce cellulos…
XPS (X-ray Photoelectron Spectroscopy) or ESCA (Electron Spectroscopy for Chemical Analysis) as a surface analytical technique has been developed over years and has been used successfully in characterization of a variety of thin films. Information such as composition, chemical states, depth profile, imaging and thickn…
This paper reports an experimental investigation of the effect of repeated laundering on the comfort-related and low stress mechanical properties of polo shirt fabrics with and without wrinkle-free treatments. Comparisons are made of untreated fabrics, fabrics treated with a hydrophobic wrinkle-free treatment, and fab…
Investigation of the impact behaviour of Hadfield steel has been carried out in a broad range of strain rates from 10 −3 to 9 × 10 3 s −1 by means of a servo-hydraulic machine and a compressive split Hopkinson bar. The effects of strain rate on the impact properties, substructure evolution and fracture resistance have…
The stress corrosion cracking (SCC) behavior of cold-worked and sensitized Type 304 (UNS S30400) stainless steels has been evaluated using the slow strain rate test. Tests were carried out in an aqueous solution of 1 N sulfuric acid (H2SO4) + 0.5 M sodium chloride (NaCl) at 30°C under various potentiostatic conditions…
Conventional methods that are used to overcome multidrug resistance (MDR) often involve the coadministration of chemosensitizers and anticancer drugs. However, coadministration of many chemosensitizers with anticancer drugs, such as doxorubicin (Dox) has resulted in the exacerbation of anticancer drug toxicity. Here,…