Materials Literature
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We have studied the dependency of rotor spun yam uniformity on variations of rotor speed, opening roller speed, and twist level. The number of points per fiber (ppf), which reflects the level of fiber opening, is useful in evaluating the effects of spinning parameters on yarn uniformity. Experiments based on a 60 tex…
CoNi/Pt multilayers were prepared by magnetron sputtering using Ar gas. The effects of the Pt seed layer and the Ar sputtering pressure on magnetic and structural properties are investigated. Microstructures of the multilayers were analysed using XRD and TEM. It was found that perpendicular magnetic anisotropy and coe…
The composition, microstructure and densification behaviour of two amorphous and three crystalline silicon nitride powders containing an MgO–Y2O3 sintering aid have been investigated. The powders were characterised in terms of bulk and surface chemical compositions, crystallinity and morphology. The hot-pressing behav…
Diacylglycerols composed of one saturated and one unsaturated chain make up the hydrophobic core of many biological membranes. We report here the first crystalline structure of such a mixed chain diacylglycerol. The mixed chain diacylglycerol, 1-stearoyl-3-oleyl-glycerol (1,3-SODG) was produced by solution isomerizati…
The objective of this study was to produce biodegradable poly(lactide-co-glycolide) (PLGA; 50/50) microspheres by an oil-in-oil (o/o) solvent evaporation method to prolong the in vitro release of ovalbumin (OVA) as a model protein. The effects, on loading efficiency, microsphere yield, morphology and drug release, of…
The reactivity of iron(III) tetraphenylporphyrin pi-cation radical (TPP(*))Fe(III)(ClO(4))(2), (1-1) iron(III) tetra-p-tolylporphyrin pi-cation radical (TTP(*))Fe(III)(ClO(4))(2) (1-2) and iron(III) tetramesitylporphyrin pi-cation radical (TMP(*))Fe(III)(ClO(4))(2) (1-3) complexes with 2,4,6-collidine, 2,3,6-collidine…
Thin films of chloroaluminum, chlorogallium, and chloroindium phthalocyanines (ClAlPc, ClGaPc, and ClInPc) have been sublimed on SnO 2 substrates maintained during sublimation at temperatures ranging from −130 to 190 °C. Using this procedure, it is possible to obtain molecular semiconductor layers with a structure var…
Palladium acetate catalyses the cycloaddition copolymerisation of diynes with elemental sulfur to afford poly(thiophene)s.
A MeOH extract from the whole plant of Boerhaavia repens was found to inhibit bone resorption induced by parathyroid hormone (PTH) in tissue culture. Systematic separation of the MeOH extract afforded one new and two known flavonoid glycosides, namely, eupalitin 3-O-beta-D-galactopyranosyl-(1-->2)-beta-D-glucopyranosi…
The adsorption and electronic structure of benzene (C 6 H 6 ) on thin film MgO(100)/Mo(100) and highly ordered Al 2 O 3 /Mo(110) substrates have been studied using temperature-programmed desorption (TPD) and high-resolution electron energy loss spectroscopy (HREELS). Three desorption states have been found for both su…
The translational diffusion coefficient D was determined from dynamic light scattering measurements for oligo- and polyisobutylenes in isoamyl isovalerate (IAIV) at 25.0 °C (ϑ) and in n -heptane at 25.0 °C in the range of weight-average molecular weight M w from 1.01 × 10 3 to 1.76 × 10 6 . The values of the unperturb…
Gel-like aqueous solutions of sodium lithocholate (NaLC) have been studied by neutron and X-ray small-angle scattering techniques. Evidence for the existence of fibrillar aggregates is presented. In a 0.48% NaLC sample, the diameter of the rod-like structures is ca. 650 Å. The scattering patterns, which can be anisotr…
The crystal structure at room temperature of the solvated iron−sulfur synthetic compound (Et 4 N) 3 [Fe 4 S 4 (SCH 2 Ph) 4 ]·DMF has been determined. The conformation of four ligand branches CH 2 Ph linked to the Fe 4 S 8 unit is very disturbed in contrast with the much more symmetrical situation in the already known…
The effect of hot band annealing temperature, range from 700-1000°C, on the magnetic properties of low-carbon electrical steels measured at 10, 15 and 17 kG inductions have been investigated. The grain microstructures of hot bands were changed by annealing at various temperature. Small grains are observed in the as ho…
The growth mechanism of CdS ultrafine particles in water-in-oil microemulsions was investigated. The growth occurs via a irreversible particle coagulation process. Its rate constant is dependent on the agglomeration number of a particle n. At small agglomeration numbers, the rate constant k is about 107 dm3mol–1s–1. I…
The effects of Brønsted acidity on the spatial structure and electronic properties of platinum clusters supported on zeolite Y have been examined with X-ray absorption (XANES and EXAFS) and X-ray photoelectron spectroscopy. The clusters contain 10−25 Pt atoms on average, with a nearest-neighbor distance of 2.70 ± 0.01…
Abstract Thin films of chloroauric acid salt of chitosan (CTOAu films) were photolyzed with 253.7 nm light. On irradiating with UV light in air at room temperature, the CTOAu film first became yellow‐blue colored due to the formation of colloidal gold. When irradiation was continued, the irradiated surface of the film…
The failed interfaces between natural rubber skim compounds and tire steel cord used as tire cord adhesion test (TCAT) specimens have been studied by scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) analysis in order to understand the influence of cobalt boroacylate in the rubber compound as an adh…
The study confirms the effect of lowering manganese (Mn) content of sour service line pipe steels on improving the resistance to hydrogen induced blister cracking (HIBC), following which thermo-mechanical control process (TMCP) is considered as an effective tool to strengthen and toughen the low manganese steels. The…
The structure and morphology of nylon 55 has been investigated using transmission electron microscopy, selected area electron diffraction, and X-ray diffraction. Different morphologies, varying from rhombus to lath-shaped lamellar crystals, were obtained from formic acid−butanol solutions. The unit cell is monoclinic…