Materials Literature
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Octachlorostyrene has been recovered from the reaction tube, along with previously reported hexachlorobenzene, during the synthesis of CrCl 3 from Cr 2 O 3 and CCl 4 at high temperature. The region in the reaction tube where the octachlorostyrene was found, namely upstream from the Cr 2 O 3 held at 890C, suggests that…
Magnetic clusters, such as Fe8 and Mn12, within large organic molecules, behave at low temperature T as large single spins S, that is, as single molecule magnets (SMM’s). In crystals, magnetic anisotropy gives rise to energy barriers U, and quantum tunnelling is then the only available path for magnetic relaxation at…
Electron‐electron coincidence techniques have been widely used to study atoms and molecules. In contrast, the application of APECS to solids has been much more limited. Recently, however, APECS has started to progress from a technique that is primarily devoted to analyzing Auger line shapes and making interesting anec…
Synchrotron Radiation micro X‐Ray Fluorescence (SR μ‐XRF) was applied for the first time to map the trace element content on Multicellular Tumor Spheroids (MTS), i.e. human cell clusters used as an in vitro model for testing micrometastases responses to antitumoral drugs. In particular, immunotoxin molecules composed…
1/2 (A - stala wymiany, K1 - stala anizotropii) od ich powierzchni. Wklad tych obszarow w sumaryczną wartośc remanencji magnesu rowny jest iloczynowi ich udzialu i namagnesowania nasycenia fazy objetej oddzialywaniami wymiennymi. Zaleznośc remanencji od zawartości pierwiastka ziem rzadkich obliczona wedlug takiego mod…
Using two cationic electropaint resins, the deposition mechanism including the film structure was studied. The resins introduced methyl methacrylate (MMA system) or methyl acrylate (MA system) into a backbone component, and these systems showed different values of the glass transition temperature The MMA resin had a o…
This work deals with the effect of the addition of a combination of two chemical blowing agents (BA), azobisformamide (ABFA) and/or sodium bicarbonate (SBC), on the processability of rigid polyvinylchloride (PVC) using a Brabender torque rheometer. This technique was previously used under conditions bearing no relatio…
Epiphytie and epilithic diatoms of the Surgu Reservoir were investigated in April 1997-March 1998. Epiphytic and epilithic diatoms in the reservoir were generally similar. In 76 diatom toxa were recorded in the Surgu Reservoir. Cymbella afflnis Kutz., Navicula cryptocephala Kutz., N. cryptocephala var. veneta (Kutz.)…
The effect of weight reduction on static- and dynamic- drape coefficients of polyester-fiber fabrics was studied precisely using 2 sets of fabric samples, one of which had various weave densities of weft yarns. Following conclusions were obtained: (1) Node number; n, the revolving drape increase coefficient; Dr, and t…
The mechanochemical (MC) synthesis of La-modified lead zirconate titanate (PLZT) powder from its constituent oxides was conducted with planetary ball milling. A single-phase perovskite PLZT powder was synthesized by dry-milling the oxide mixture for a relatively short period (36 ks at 400 rpm). Dense PLZT bulk samples…
Thermoforming of braided thermoplastic composite tubes was carried out in order to clarify the mechanism of the thermoforming process for pipe fittings such as T-shape fittings, cross fittings and two-branch fittings. The composite tube was made of a cowoven braid that consists of a carbon braid and polyamide resin, a…
A carbon plasma plume was produced in a vacuum by ablating a graphite target using KrF excimer laser, Nd:YAG laser second harmonic and fundamental light. Emission spectroscopy, two-dimensional laser induced fluorescence (2D-LIF), spectral absorption and ion probe diagnostics measurements were used to measure C atoms,…
Microstructures and material properties of TiN reinforced-Si3N4 composites, fabricated by hot pressing and using Si3N4, TiN and sponge Ti powders, were investigated. The sponge Ti powders in the Si3N4–TiN-sponge-Ti compacts are fully nitrided into TiN without residual Ti phase, but some residual pores remain. The Si3N…
This paper describes how the polyvinyl alcohol (PVA) used to anchor molecules in nematic liquid crystal cells (NLCs) presents the typical behavior of a disordered solid whose electric conductivity is frequency and temperature dependent ( σ '( y ,T)), in accordance with the hopping behavior. It has also been found, how…
Ce‐pyrochlore (CaCeTi2O7), is a chemical analogue for CaPuTi2O7, which is a proposed ceramic waste form for deposition of excess weapon‐usable Pu in geological repositories. Ce‐pyrochlore was synthesized by firing and annealing a mixture of Ce(NO3)4, TiO2, and Ca(OH)2 with a stoichiometry of CaCeTi2O7 at 1,300°C for 5…
Although the diameter dispersion of the phonons composing the Raman G‐band of single wall carbon nanotubes (SWCNTs) is well understood theoretically, systematic experimental studies on the subject are scarce. We investigated 6 different diameter samples between d=1.05−1.57 nm with several excitation lasers and used ar…
Terephthalic acid(PTA) is practically one of the main materials of polyester. Its corresponding solid-liquid equilibrium data will provide essential support for industry design and further theoretical studies. In this work,solid-liquid equilibriums of terephthalic acid in four solvents, N,N-dimethylformamide, N,N-dime…
Chitosan was purportedly first discovered in 1859 by Rouget while he was experimenting with chemical and thermal manipulation of the natural fiber chitin (Au Natural Herbals, 2001). Since then, chitosan has been used as a pharmaceutical excipient in sustained release dosage forms, as an immunostimulant, and to promote…
Ag, Pt, and Pd were added to the cathode functional layer of planar solid oxide fuel cells to increase the current density. The addition was performed by four methods: infiltration (Pd), coating (Pt), mixing (Ag, Pd, Pt), and synthesis of La 0.65 Sr 0.30 MnO 3 with the addition of AgNO 3 . An electrocatalytic effect w…
The activation of clays by heat treatment will produce artificial pozzolana which reacts with Ca+2 or Ca(OH)2 in presence of water to form new building materials. In this study the montmorillonite clay was activated by burning at different temperatures (550,700,800,900 & 1000°C) then mixed with lime at different compo…