Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Atomistic lattice simulations are used to study SnO2 and the series of stannates ASnO3(A = Ca, Sr, Ba). Among the properties considered are crystal structure, defect chemistry and oxidative non-stoichiometry, surface structure and morphology. On the basis of our calculated defect model, we suggest a possible interpret…
The compositional ranges of Bi4V2O11 solid solutions containing trivalent cations: B, Al, Cr, Y and La have been determined by means of a phase diagram study at solidus temperatures, ca. 850 °C. At least three mechanisms for accommodating variable cation contents are required. These are nominally V → Bi, V → M, Bi → M…
An ESR study of interactions between the nonmesomorphic nitroxide spin probe solutes PD−tempone (PDT) and tempo−palmitate (TP) and homologues of the p - n -alkyl- p ‘-cyanobiphenyl series of liquid-crystals has been carried out. The characteristics of the ESR spectra obtained show that the constraint for rotation abou…
The diffuse reflectance UV spectra of dehydrated titanium silicalites of MFI structure are consistent with the presence of both open [Ti(OH)(OSi)3] and closed [Ti(OSi)4] tetrahedral titanium sites, the closed sites seem to be the only ones occurring in TiO2–SiO2 silica gel.
Abstract For use as electrical and electronics parts, or automobile and mechanical parts, toughened poly(phenylene sulfide) (PPS) is desired. For these applications, our investigation centered on improving the toughness of PPS and developing elastomer‐toughened PPS and elastomer‐toughened compounds of PPS. Using chemi…
Photochromes, bound to polysulfone via carboxyamide bonds and physically blended in a polymeric matrix, were prepared and their physical and photochromic properties investigated. In order to express the photochromic activity, plasticization is required; this is readily achieved by using the swelling solvent, N -methyl…
Three new polynuclear copper(II) complexes with aminoalcoholate and acetate as ligands, [Cu2(O2CMe)2(OCH2CH2NMe2)2]1, [Cu2(O2CMe)2(OCH2CH2NMe2)2(H2O)2]2 and [Cu4(µ4-O)-(bdmmp)2Br4]3[Hbdmmp = 2,6-bis(dimethylaminomethyl)-4-methylphenol], have been synthesised and their structures were determined by X-ray diffraction an…
Background/aims: Duplex stainless steels constitute a high strength stainless steel family with high corrosion resistance properties. The use of them has dramatically grown in the last 10 years, particularly in the fields of off-shore, chemical tankers and chemical industries; however, the high strength also makes the…
The dielectric properties of four native starch solutions, both gelatinized and ungelatinized with concentrations from 5 to 30% over the temperature range from 3°C to 95°C, were measured by a cavity perturbation technique at 175 GHz. The dielectric properties of the starch types did not differ from each other; the mos…
Copolymers of n -hexyl and allyl isocyanates were successfully synthesized using an organotitanium(IV) catalyst initiated polymerization. Viscosity measurements indicated that molecular weight increased with decrease in monomer/initiator ratio. Monomer reactivity ratios were calculated using the copolymer composition…
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…