Materials Literature
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Does osmotic pressure stimulate assembly or disassembly of supramolecules in vesicles? Self-assembly was conceivable as intravesicular response to osmotic shrinking upon application of extravesicular overpressure, whereas disassembly was conceivable as a response to bilayer stress in hyperosmotic vesicles. Self-assemb…
In this paper, we discuss the synthesis of cadmium sulfide (CdS) quantum dots within thermally evaporated sodium bis(2-ethylhexyl)sulfosuccinate (AOT) thin films. This procedure uses electrostatic interactions to entrap positively charged cadmium ions into thin films of the anionic surfactant AOT by a simple immersion…
This paper reports on the electric field behavior in INDC SF, gas insulated systems. In the field model definitions, the SF,/epoxy interfaces are assumed as thin slightly conducting layers with non-zero thickness. The boundary conditions involving surface-reduced parameters of these layers are adopted. This allows avo…
Atmospheric corrosion of hot-dip Zn-6%Al-3%Mg alloy coated steel sheet after 5 years of exposure in a severe marine and a rural sites have been investigated compared with Zn-0.2%Al and Zn-4.5%Al-0.1%Mg alloy coated steel sheets.The corrosion resistance of Zn-6%Al-3%Mg alloy coated steel sheet is more superior than tha…
The effects of reaction conditions on a novel monomer recycling method for high-temperature-vulcanized silicone rubber are described. A mixture of a methanol solution of (CH3)4NOH, diethylamine and hexane was adopted to partially depolymerize and dissolve the high-temperature-vulcanized silicone rubber under reflux. H…
SUMMARIES Slow cellulose degradation at room temperature requires the application of accelerated ageing tests. After an ageing treatment, the paper samples were usually stored at standard room temperature, before being used for further studies. It was assumed previously that degradation was again very slow during the…
Mesoionic 2,4-diphenyl-3-methyl-1,3-thiazolium-5-thiolate, 2-(4′-chlorophenyl)-3-methyl-4-phenyl-1,3-thiazolium-5-thiolate and 2-(4′-chlorophenyl)-3-methyl-4-(4′-isopropyl-phenyl)-1,3-thiazolium-5-thiolate were synthesized via N-methyl-C-aryl-glycines, involving a one-pot 1,3-dipolar cycloaddition/cycloreversion seque…
Phthalocyanines: Spectroscopic and Electrochemical Characterization. The Photophysical Properties of Phthalocyanines and Related Compounds (N. Kobayashi, K. Ishii). Optical Spectra and Electronic Structure of Metallophthalocyanines and Metalloporphyrins (J.Mack, M. Stillman). Redox Properties and Electrochemistry of P…
Negative refraction is a wave phenomenon beyond geometrical optics - it depends on the way waves behave when their phase velocity reaches a zero. Various forms of linear wave processes in media can be concisely described in one wave equation that is inspired by the interpretation of a medium as an effective space-time…
A novel smectic phase has been discovered in the W-shaped molecular system of N,N′-bis[2-hydroxy-5-(4′-n-tetradecylphenylazo)benzylidene]-4-nitro-1,3-phenylenediamine. On slowly cooling this material from the isotropic phase, fine filaments of a chiral nature appear. When they cover the whole surface, schlieren-like t…
This paper presents a study to evaluate low temperature rheological properties of crumb rubber modified binders and the impact of the rubber particle size and content on such properties. Three sizes of the crumb rubber (0.18 mm, 0.425 mm and 2.0 mm), a control (0 percent) and two levels of crumb rubber content (12 per…
An emission at 281 nm with a 10.5 ns single exponential decay and a highly selective, narrow excitation region between 202 and 211 nm has been observed for ${\mathrm{Ce}}^{3+}$ doped in ${\mathrm{Cs}}_{3}{\mathrm{LuCl}}_{6}.$ Wavelengths between 50--200 nm and longer than 215 nm have zero excitation efficiency. Excita…
materials With the growing public interest in environmental problems in recent years, the importance of thermoelectric power generation — an energy conversion technology — is being re-recognized. In 2002, the “development of a high-efficiency thermoelectric power generation system ” was started under the leadership of…
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Extracted thermomechanical pulp from spruce was fractionated into microfines, fibrils, flakes, ray cells and fibres using centrifugation, sedimentation and filtration steps. The chemical composition and the amount of anionic groups were determined. The various types of fines differed greatly in chemical composition. T…
Systematic density functional B3LYP calculations with the 6-31G* and 6-311+G* basis sets have been employed in order to investigate the structure, vibrational frequencies, relative energies, vertical ionization potentials, and magnetic shielding constants of endohedral and exohedral isomers in two related families of…
This report describes investigations performed on as welded and post weld heat treated samples of AISI 8630 steel, buttered with Inconel 625 and Inconel 725. The investigations have focused on the properties and microstructure in the partial mixed zone between the buttering and the steel before and after post weld hea…
New mesogenic homologous series of Schiff base cinnamates comprising a naphthalene moiety were prepared by condensing different 4(4'-n-alkoxy cinnamoyloxy) benzaldehydes with 2-amino naphthalene. All the synthesized compounds were characterized by combination of elemental analysis and spectroscopic techniques. All the…
Factors that influence alloying zirconium to magnesium with a Mg-33.3Zr master alloy and the subsequent grain refinement are discussed based on a large number of experiments conducted at the laboratory scale (up to 30 kg of melt). It is shown that the zirconium particles released from the Zirmax(R) master alloy must b…
The oxidation behavior of B4C–(25–60 mol%)SiC composites prepared by arc-melting was investigated in the temperature range of 1073 to 1773 K using a thermogravimetric technique. Liquid borosilicate, solid SiO2 and carbon were identified as oxidation products by X-ray diffraction and Raman spectroscopy. Mass gain was o…