Materials Literature
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ZrWMoO8 has been shown to undergo a phase transition at remarkably low temperatures in which oxygen atoms become dynamically disordered. The kinetics of this process have been studied by a variety of laboratory-based time and temperature dependent powder diffraction experiments. Oxygen mobility from temperatures as lo…
The influence of in-coating strontium chromate pigment dispersions on the kinetics and mechanism of HCl-induced filiform corrosion (FFC) affecting polyvinyl butyral coated AA2024 T3 aluminum alloy is studied using a scanning Kelvin probe. FFC initiation and propagation are detected by imaging time-dependent changes in…
A novel symmetric liquid crystalline compound with two chiral butyl lactate chains, (S,S)-bis[4-(1-butoxycarbonyl)ethyloxycarbonyltolanyl]fumarate (BisBLOCTF), was synthesized. This compound was found to exhibit a very unusual phase sequence involving several frustrated mesophases, namely smectic Q, TGBC, TGBA and blu…
Tin oxide nanostructures with controlled narrow particle size distribution were synthesized inside silica mesoporous templates. In this way, particle growth was blocked by physically corseting the tin compound inside the silica frameworks, the pore diameter of which determines the final tin oxide crystallite size dist…
AIM: To evaluate the effect of aclacinomycin A-loaded magnetic polybutylcyanoacrylate nanoparticles on gastric tumor growth in vivo and in vitro. METHODS: Magnetic polybutylcyanoacrylate (PBCA) nanospheres encapsulated with aclacinomycin A (MPNS-ACM) were prepared by interfacial polymerization. Particle size, shape an…
Product designs and properties of 6 steel products for shipbuilding are described. They are new TMCP (thermo-mechanical control process) steel plates, weldable with high heat input, for container ships and LP (longitudinal profile) plates, both contribute to the increase in productivity at shipyards through the large…
A catalyst system consisting of palladium and a peroxo-heteropoly compound in methanol showed 81.6% selectivity for propylene oxide at 42.7% propylene conversion using molecular oxygen as oxidant in an autoclave reactor at 373 K for 6 h.
A photochromic liquid crystal system based on a diarylethene functionalised in the 2,2'-positions and linked to 4-cyano-4'-hydroxybiphenyl groups via alkyl spacers as chromophores was synthesised and its photochromic and mesomorphic behaviour was investigated.
Two new clerodane-type diterpenoids trivially named as ballotenic acid (1) and ballodiolic acid (2) have been isolated from Ballota limbata along with three the known compounds; beta-amyrin, oleanolic acid, and beta-sitosterol. The structure elucidation of the new compounds was based primarily on two-dimensional (2D)-…
Clay mineral analysis is widely used to characterize soil parent material and to relate it to the bedrock. When it is applied to a soil profile, it can give a ‘genetic signal’ of mineralogical transformations due to soil-forming processes. In this study, ten selected soil profiles in Montagnola Senese, central Italy,…
Complex dielectric permittivities, for two orientations of the director n, parallel (E || n) and perpendicular (E ⊥ n) to the probing electric field E, of the weakly polar liquid crystals (LCs) 4,4′-dihexylazoxybenzene (D6AOB) and 4,4′-diheptylazoxybenzene (D7AOB) as well as the non-polar LC diheptylazobenzene (D7AB)…
Supercritical was used to facilitate silylation in repairing oxygen plasma-induced damage during photoresist stripping in porous organosilicate films. Samples with open and closed-pore morphologies prepared by sacrificial-porogen approach were exposed to plasma to simulate damage. These samples were pretreated with 10…
Coating of extracorporeal circuits may be a solution to prevent adverse effects induced by the contact of blood elements and proteins with foreign surfaces. This paper reviews the recent novel coating technologies and compares their documented in vitro and ex vivo advantages under the clinical setting. Data presented…
Nucleophilic substitution reactions on hexadecafluorophthalocyaninato zinc(II) with a variety of O, N, C, and S nucleophiles led to narrowly defined mixtures of polysubstituted phthalocyanines, some of which are completely inaccessible by classical phthalonitrile condensation reactions.
Pulsed neutron and high energy X-ray diffraction experiments on single- and two-phase Al2O3–Y2O3 and single-phase Al2O3–La2O3 glasses suggest that a polyamorphic phase transition occurs via changes in the Y–O coordination and connectivity. The transformation from a high temperature to a low temperature amorphous phase…
Abstract Bismuth sodium titanate (abbreviated as BNT) based solid solution, [Bi 0.5 (Na 1‐x‐y K x Li y ) 0.5 ]TiO 3 (0 < x + y < 1) ceramics, was invented in our group. These ceramics, which are considered as new candidates for lead‐free piezoelectric materials, were prepared by conventional ceramic sintering te…
A comparative Raman study of (Ba,Sr)TiO3 bulk ceramics, sol-gel derived polycrystalline thin film, and heteroepitaxial thin film deposited by rf sputtering onto (001) MgO substrate is reported. It is found that phase transition sequence in the heteroepitaxial thin film is markedly different from those observed in the…
The intramolecular addition of benzylic radicals, generated from benzyl phenyl selenides by the action of tris(trimethylsilyl)silane and AIBN or AIBMe, onto neighbouring ketenimine functions is studied. The persistent α-(indol-2-yl)benzyl radicals, resulting from such cyclization processes, undergo cross-coupling with…
The Effect of Mn incorporation into perovskite B-site lattice of SrTiO3 ceramics on structural and low frequency dielectric properties is studied in this work. Lattice parameter and grain size decreases with Mn content increasing. Mn doping reduces dielectric permittivity value and drives the system away from ferroele…
With the emergence of commercial hyper-branched (HB) and dendritic polymers, having a three-dimensional (3D) morphology with high peripheral functionality, new opportunities have been created for formulating dental adhesives and composites with enhanced mechanical and physical properties. The objective of the present…