Materials Literature
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Structure–property relationships were investigated to reveal the generic influence of various substituents on ferroelectric BaTiO 3 . Compositional modifications of ferroelectric BaTiO 3 were systematically investigated for La 3+ and Nb 5+ substituents. A generic influence of charged point defects in breaking down the…
Optimization of the dissolved hydrogen concentration in primary coolant of pressurized water reactors has several potential advantages in material integrity and dose reduction. To assess the threshold value of dissolved hydrogen for reducing condition, in-pile loop experiments and radiolysis model calculations were pe…
Cascade of phase transitions in GdFe 3 (BO 3 ) 4 at 156, 37, and 9 K has been detected by specific heat measurements and further studied by Raman scattering and Nd 3+ spectroscopic probe method. A weakly first-order structural phase transition at 156 K is followed by a second-order antiferromagnetic ordering phase tra…
Abstract The sorption behaviour and flavour‐scalping potential of selected packaging films in contact with food simulant liquids (FSLs) (ethanol and acetic acid solutions) were evaluated after high‐pressure processing (HPP). The films used were monolayer polypropylene (PP), a multilayer (polyethylene/nylon/ethylene vi…
K2Ca2(SO4)3 microcrystalline pure, doped with Eu, Tb and co-doped with Eu, Tb was prepared by solid-state diffusion method. Nanoparticles of these phosphors were also prepared by the chemical co-precipitation method. The formation of the compounds was confirmed by XRD. The particle size was calculated by broadening of…
Abstract We describe the hierarchical structures of mesostructured silicas assembled from electrically neutral and unsymmetrical Gemini surfactants of the type C n H 2 n +1 NH(CH 2 ) m NH 2 with n = 10, 12, 14 and m = 3, 4. As expected for Gemini surfactants with an all anti‐chain configuration and a packing parameter…
Reaction of [Mn6(O)2Piv10(Thf)4].Thf with 2,4,4,5,5-pentamethyl-4,5-dihydro-1H-imidazolyl-3-oxide-1-oxyl (NIT-Me) produces different heterospin compounds depending of the solvent used in the synthesis. Among the latter a new molecular magnet [Mn6(O)2Piv10(Thf)2(NIT-Me)Mn6(O)2Piv10(Thf)(CH2Cl2)(NIT-Me)] with Tc = 3.5 K…
A literature review of the development, mechanical properties and uses of pineapple leaf fibre (PALF) reinforced polymer composites is presented in this paper. The mechanical properties of PALF composites as determined by various researchers are discussed, together with chemical, thermal and physical properties. Both…
Phase change materials have been a main topic in research for the last 20 years. They have also been used in many engineering applications, especially in the fields of thermal storage and insulation. They are used for ice storage, building applications, in the field of solar energy storage, heat pumps, heat distributi…
Abstract A fluorene derivative having two diarylethene units at the 9,9′-positions was synthesized, and the photochromic behavior was examined in a single-crystalline phase as well as in solution. Upon irradiation with ultraviolet light (λ = 313 nm), a hexane solution of the diarylethene dimer (1a) turned blue. The bl…
Cross-sectional analysis of cotton fibers provides direct, accurate measurements of fiber fineness and maturity, which are often regarded as the reference data for validating or calibrating other indirect measurements of these important cotton properties. Despite the importance, cross-sectional methods of using image…
Esterified hyaluronic acid (HYAFF) is routinely used for clinical tissue-engineering applications such as skin and cartilage. The material is degraded by neotissue formation and degradation products are highly biocompatible. In the present article we investigate the possibility to culture vascular smooth muscle cells…
Biomineralisation can only be understood as an interplay between organic and mineral phases. With this objective, we conducted an investigation of coccoliths using atomic force microscopy (AFM), an ultra‐high resolution technique that requires no surface coating and can be used in air or under solution at ambient cond…
With series production of aluminium foams according to the Fraunhofer process a reality, further improvement of structural homogeneity has gained interest. Since this characteristic is strongly influenced by blowing agent decomposition, means to adapt the latter have been investigated: The paper concentrates on therma…
The existence of localized vibrations at low frequencies in glasses and the notion and the properties of quasilocalized vibrations (QLVs) in glasses have been debated in the recent literature. By clarifying the main features of the QLVs and of the low-frequency vibration in model systems (a defect lattice and a Lennar…
Solid-state 13 C NMR measurements were made for the B2 and B4 phases of the achiral banana-shaped molecule, P-14-O-PIMB, which exhibits a direct transformation from the B2 phase to the B4 phase. In both phases, an NMR resonance signal assigned to carbonyl carbons of the ester linkages appears as doublet peaks, showing…
Abstract The control of interfacial charge transfer is central to the design of photovoltaic devices. This charge transfer is strongly dependent upon the local chemical environment at each interface. In this paper we report a methodology for the fabrication of a novel nanostructured multicomponent film, employing a du…
Abstract The epoxidation of methyl linoleate was examined using transition metal complexes as catalysts. With a catalytic amount of methyltrioxorhenium (4 mol%) and pyridine, methyl linoleate was completely epoxidized by aqueous H 2 O 2 within 4 h. Longer reaction times (6 h) were needed with 1 mol% catalyst loading.…
Comprehensive 2-D GC provides high-performance separations in terms of selectivity, sensitivity, speed, and structure.
Abstract Transition metal catalysts such as Pd, Pt, Ru, and Rh supported on carbon, silica and alumina have been examined for the hydrogenation of nitrobenzene (NB) in supercritical carbon dioxide (scCO 2 ) and in ethanol. The order of hydrogenation activity is Pt>Pd>Ru, Rh in scCO 2 and in ethanol. The effectiv…