Materials Literature
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As a new azide-free gas generant, the thermal behavior of the Sr complex nitrate of carbohydrazide was investigated in the mixed system with various oxidizing agents (KClO4, KBrO3, Sr(NO3)2, KNO3). For the differential thermal analysis, the initial temperature of the reaction of mixtures with KBrO3 was lower than that…
ABSTRACT Aqueous solutions of sodium hydroxide were used to debran whole sorghum and millet grains. The alkali solution was effective in dissolving the pericarp, leaving the kernel free of pericarp. Various combinations of concentration of sodium hydroxide (3, 6, and 10%, w/w) and soaking duration (5, 8, and 10 min) w…
DSC, X-ray, broad-line proton NMR, and microscopy studies on several series of N,N' -dialkanoylbenzene-1,2-diamines are presented. The melting point and associated enthalpy are not much affected by methylation of the aromatic nucleus. While the dimethyl compounds carrying heptanoyl-to-hexadecanoyl groups generate meta…
The effect of sulfur accelerators during the curing process in natural rubber (NR) was investigated. The samples were prepared by adding the same fraction of various types of accelerators in the compound and all samples were cured at the same temperature but for two different times. Determination of the molecular mass…
Homeotropic nematic layers of MBBA, oriented by self-assembled layers (on glass substrates) of dilauroyl phosphatidyl choline (DLPC), cetyl trimethyl-amonium bromide (CTAB) and silane orienting agent (ODS-E), were studied by phase-sensitive flexoelectric spectroscopy method. DLPC solutions in chloroform provided multi…
Abstract The determination of the optimum lime content of fly ash is very important to enhance its use. Recently, methods have been established to obtain the optimum lime content of fly ashes. Strength obtained at different ages becomes important for different applications. The effect of the curing period on the optim…
The design, construction, and use of a furnace from which time-resolved x-ray diffraction data may be measured from reacting mixtures of solids or of solids and liquids is described. The furnace is a vertical tube design, constructed from commercially available components, and can operate at temperatures of up to 1000…
Recent research into superplasticity has developed substantially, to the extent that there are now important directions for future investigations, one of which is high strain rate superplasticity (i.e., superplastic behaviour at strain rates over 10-2 s-1) in metallic materials. Superplasticity at extremely high strai…
This paper describes the synthesis and characterization of four bismaleimides containing a phenylbenzoate mesogenic group and differing by the length of the polymethylenic spacers. They were prepared by reacting 4-maleimidobenzoyl chloride with diphenols containing methylene bridges. The cured resins are stable up to…
This paper presents simulations of directional solidification of multicomponent alloys using the phase field method. In order to calculate thermodynamic quantities of the alloy, the phase field model has been coupled to multicomponent thermodynamic databases in an `online' mode using the TQ-Interface of the software T…
Recent years have seen a growing interest in optical sensors based on oxygen-induced or temperature-induced changes in the luminescence intensity of organic dyes [1][2][3][4].Probes available for optical temperature sensor are fluorescent, thermal-quenchable and non oxygen-quenchable organic and inorganic dyes, such a…
Polymer network-stabilized ferroelectric liquid crystals with homogeneous alignment have been produced in cells without a surface alignment layer. In this technique, a crosslinkable monomer is mixed into a ferroelectric liquid crystal and polymerized in a magnetic field to form a polymer network that will stabilize th…
Abstract A new photoluminescent oxygen sensor based on the luminescence intensities of tris(acethylacetonato) 1,10-phenanthroline terbium(III) complex (Tb(acac)3phen) doped in alumina film was developed. The luminescence intensity of the Tb(acac)3phen film decreased with increasing the oxygen concentration. Tb(acac)3p…
The thermal annealing behaviour of metamict titanite from Cardiff, Canada, which shows moderate structural damage from the a-decay of radiogenic elements (U, Th) has been studied using single-crystal synchrotron radiation and optical-birefringence techniques. Progressive and isothermal annealing experiments yield a te…
In this study, integration of an hydrogen barrier into a FeRAM process flow is investigated. It is reported in the literature that ferroelectric properties can be maintained after hydrogen annealing by using IrOx as a top electrode [16][17][18]. Advantage of materials like IrOx is less catalytic activity compared to P…
The crystal structure of elyite, Pb 4 Cu(SO 4 )O 2 (OH) 4 ·H 2 O, a = 14.233(2), b = 11.532(1), c = 14.611(2) Å, β = 100.45(1)°, V = 2358.4(5) Å 3 , Z = 8, was solved by direct methods and refined in space group P2 1 /c to R1 = 3.64% and wR2 = 5.10% for the 5861 independent reflections. Data were collected on a tiny u…
Abstract The availability of an excellent and freely available molecular visualisation package authored by Roger Sayle‐RasMol, coupled to the protein data bank (PDB) resource of molecular structure data makes the visualisation and manipulation of molecular data accessible to the Internet community. Tutorials based on…
Superplastic deformation is arguably the most dramatic and direct illustration of the influence of grain boundaries on the mechanical properties of fine grained metals. Stable tensile elongations in excess of 1000%can be attained under suitable conditions, and microstructural observations show that most of this strain…
In this study we present the fabrication, the optical characterization and the electrical operation of a high quality, nanometer-sized, silicon-based light modulator made of nematic liquid crystals (LC) encapsulated into porous silicon (PSi) multilayer matrix. We first demonstrate the infiltration procedure and charac…
New cell designs of coaxial microwave cavity type are reported for simultaneous electrochemical electron spin resonance measurements. Adjustable metallic shields are introduced so that the working electrode can be much shorter than the full height of the cavity. Besides the traditional helical electrode, the working e…