Materials Literature
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A novel nonlinear optical complex crystal with an organic ligand coordinated through an O atom: tetrathiocyanatocadmiummercury-dimethyl sulfoxide, [CdHg(SCN)4(H6C2OS)2], (CMTD) is reported for the first time. Single crystals have been grown by temperature-lowering method, the crystals tructure has been determined, and…
Polarization properties of elliptical-core liquid crystal optical fibres have been investigated and the experimental results on the liquid crystal fibres in the polarimetric configuration subjected to the influence of hydrostatic pressure and temperature are presented.
The induced uniaxial anisotropy field H/sub k/ in very thin films sandwiched by Ta or Cu layers was investigated. The value of H/sub k/ of the Ta/Cu/Ni/sub 79/Fe/sub 21//Cu/Ta film decreases as film thickness decreases below 20 nm, even after an annealing procedure in a magnetic field. This H/sub k/ reduction is simil…
The role played by inorganic chemical additives in fire retardancy and flame inhibition is considered. Particular attention is given to the molecular level aspects of commercially important systems containing compounds of antimony, halogens, and phosphorus. The flame inhibiting function of metal containing additives i…
Solid-state extrusion technique was employed for the improvement of flexural strengths of poly(L-lactic acid) (PLLA) that is currently used as materials for various internal fixation devices. PLLA was vacuum compression molded to have two different crystallinities, from which cylindrical billets of various diameters w…
Changes in rheological properties, morphology, and oil resistance in NR–NBR blends by viscosity ratio have been investigated. In this study, the viscosity ratio was modified by mechanical mastication and addition of liquid natural rubber (LNR) and epoxidised liquid natural rubber (ELNR). The results reveal that as vis…
The effects of Zr and Co substitutions for Fe on the magnetic properties of nanocrystalline near-stoichiometric (Nd/sub 0.75/Pr/sub 0.25/)/sub 12/(Fe/sub 1-x/Co/sub x/)/sub 82-z/Zr/sub z/B/sub 6/ (x=0,0.1,0.2 and z=0-4) alloy ribbons are reported. The nanoscale structures were derived by devitrification annealing of a…
We have studied the processes of photocoloration and discoloration in Mn:YAlO3 and relevant crystals. We show the following: (1) The coloration rate in Mn:YAlO3 does not depend on Mn concentration. (2) The effective recombination time of free electrons with Mn5+ ions and deep traps is of the order of ≈0.5 ms. (3) The…
The molecular associations of N-( n-hexyl)hexanamide (PA-12MC) and N-( n-butyl)benzenesulfonamide (BBSA), taken as model compounds for polydodecamide (PA-12) and benzenesulfonamide plasticizers, respectively, were examined by Fourier transform infrared spectroscopy. In solution, the amide is distributed between a self…
Submersed macrophytes are real w ater plants because they are rooted in sediment and can complet e their grow t h and reproduction inside t he overlying w ater.P roviding a linkage bet ween w ater and sediment, t hey have t he closest int eraction w it h w ater environment.T his interact ion is very complicat e partly…
Abstract The radiation polymerization of hydrophilic hydroxyethyl methacrylate monomer solution at temperatures below 0 ° C leads to the formation of a porous structure in the polymers. The melting peak of the eutectic water–monomer composition at the eutectic point (above − 24 ° C ) could be distingushed and a glass…
Two novel series of bent-shaped achiral azo compounds with the following molecular structures have been synthesised and characterised.
Linear polysiloxanes bearing 3-chloropropyl groups pendant to the polymer chain and containing a vinyl functional group at one chain end were synthesized by anionic ring polymerizations of 2,4,6-tri(3-chloropropyl)-2,4,6-trimethylcyclotrisiloxane, 1, and 2-(3-chloropropyl)-2,4,4,6,6-pentamethylcyclotrisiloxane, 2, ini…
The possible use of an FT-IR imaging system for surface studies of atmospheric corrosion products on zinc and nickel samples has been explored. Samples have been exposed in an urban site located at Rouen in France. Corrosion products, detected by means of energy-dispersive spectrometry/X-ray diffraction (EDS/XRD) and…
We fabricated a planar-type film inductor with good high frequency characteristics using a FeTaN soft magnetic film. While FeTaN films inherently show good soft magnetic properties and high saturation magnetization, addition of Ti underlayer with a combination of magnetic field annealing leads to an increase of anisot…
Aspartate aminotransferase from an extremely thermophilic bacterium, Thermus thermophilus HB8 (ttAspAT), has been believed to be specific for an acidic substrate. However, stepwise introduction of mutations in the active-site residues finally changed its substrate specificity to that of a dual-substrate enzyme. The fi…
Transmission electron microscopy (TEM) of yttria (Y2O3)-cubic-stabilized zirconia with an yttria content between 24 and 32 mol% reveals diffuse electron scattering. Analysis of the diffuse intensity maxima in electron diffraction patterns recorded with the incident electron beam along (112)c or (110)c zone axes sugges…
By reacting manganese nitrate and sodium hydroxide at pH/spl sime/12 and heating the product at 400/spl deg/C for 3 hrs, Mn/sub 5/O/sub 8/ with crystallite size /spl sime/14 nm and the Cd/sub 2/Mn/sub 5/O/sub 8/ structure is produced, as confirmed by x-ray diffraction. Magnetic state of Mn/sub 5/O/sub 8/ is investigat…
Structural studies have confirmed that it is possible to exploit the relatively low nucleophilicity of the “external” amino substituents on the CoIII complex of 1,8-diaminosarcophagine (“sarcophagine” = sar = 3,6,10,13,16,19-hexaazabicyclo[6.6.6]icosane) in acylation and alkylation reactions leading to a variety of fu…
Structural and magnetic analyses were made for /spl alpha/'-Fe-C (0-12 at.%C) and /spl alpha/'-Fe-N(0-12 at.%N) films. The results are summarized as follows: (1) epitaxial Fe-C films consisting of an /spl alpha/'-Fe-C single phase with a C content up to 12 at.% can be synthesized on MgO single crystal substrates by sp…