Materials Literature
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Optical second-harmonic generation (SHG) is conditional upon the structure being non-centrosymmetric and consequently, the Langmuir-Blodgett (LB) technique is of interest because it permits control at the molecular level. However, the criteria for alignment at the air/water interface, >i.e. a hydrophilic head and a hy…
A phase-field system with memory which describes the evolution of both the temperature variation and the phase variable is considered. This thermodynamically consistent model is based on a linear heat conduction law of Coleman-Gurtin type. Moreover, the internal energy linearly depends both on the present value of and…
A piezoelectric/electrostrictive RAINBOW actuator is a monolithic bending device consisting of an electromechanically active layer and a reduced passive layer formed in a high‐temperature reduction treatment. When the piezoelectric or electrostrictive layer is driven under an electric field or when the environmental t…
Polyhydroxyalkanoate biosynthesis genes of Aeromonas caviae were expressed in Escherichia coli LS5218 (fadR atoC(Con)), and the polyhydroxyalkanoate-producing ability of the recombinants was investigated. A LS5218 strain harboring only phaCAc (polyhydroxyalkanoate synthase gene) did not accumulate any polyhydroxyalkan…
Imidodiphosphinate ligands form a hydrophobic shell around terbium and europium ions leading to long-lived, highly luminescent complexes.
We describe the preparation of a manganese oxide polymorph in which the solid‐pore architecture of the material is controllably varied. All gels derived from a sol‐gel synthesis and annealed to crystallize in the 2 × 2 tunnel structure of cryptomelane , but exhibit markedly different final pore structures based on how…
An Al-0.2%Sc alloy and an Al-3%Mg-0.2%Sc alloy were subjected to equal-channel angular pressing to a strain of ∼8 to produce grain sizes of ∼0.7 and ∼0.2 μm, respectively. Because of the presence of some areas of subgrain boundaries in the Al-3%Mg-0.2%Sc alloy, additional samples of this alloy were subjected to ECA pr…
Tricycloquinazoline (TCQ) based discotic liquid crystals have recently received increasing attention due to their interesting physical and electronic properties. Three new branched chain TCQ derivatives 6a–c were prepared and characterized. One of them, 6c, was found to be mesogenic at room temperature, having a very…
The organo-pillared octahedral–tetrahedral (O/T) layer solid Co4(SO4)(OH)6(H2NC2H4NH2)0.5·3H2O is robust to loss of water molecules within the galleries, thermally stable to 300 °C and orders as a metamagnet below 14 K.
In our continuous work on the enhancement of the antibacterial activity of beta-lactam antibiotics against the cells of methicillin-resistant Staphylococcus aureus (MRSA) strains by Keggin-structural polyoxotungstates and their lacunary species, Wells-Dawson, double-Keggin, and Keggin-sandwich polyoxotungstates are al…
Two photoactive dyads bearing pyrene and 2,2′-bipyridine terminals bridged by an ethynylene or a Pt(II) bis(σ-acetylide) moiety have been studied by fluorescence and transient absorption spectroscopy following excitation into the pyrene unit. Pyrene-like fluorescence and phosphorescence are observed for the Pt(II) bis…
Blends of high-density polyethylene (HDPE) and poly(ethylene terephthalate) (PET) in weight compositions of 20/80, 40/60, 60/40 and 80/20 were modified with glycidyl methacrylate functionalized polyolefins with the aim of improving the compatibility and in particular elongation and impact strength. The compatibilizers…
Lanthanide‐modified lead lanthanum zirconate titanate (PLZT) ceramics were prepared through a hydroxide co‐precipitation method, and the effects of the lanthanide ions on the structural and dielectric properties of the PLZT ceramics were investigated. The substitution site of the lanthanide ions was found to change fr…
The blocking effect of boundaries in SrTiO 3 bicrystals on the chemical diffusion of oxygen is monitored in situ. The optical technique that is applied allows precise recording of spatial profiles as a function of time. The low symmetrical boundary (near Σ 13) shows a pronounced chemical resistance reflected by a dist…
The crystal structure and magnetoresistance of are investigated. La 1-x Na x MnO 3 crystallizes in a rhombohedrally distorted perovskite structure and exhibits a sharp ferromagnetic transition as well as a negative magnetoresistance at around room temperature. On the basis of alternating-current susceptibility and res…
The YER057c/YIL051c/YjgF protein family is a set of 24 full-length homologs, each approximately 130 residues in length, and each with no known function or relationship to proteins of known structure. To determine the function of this family, the structure of one member--the YjgF protein from Escherichia coli--was solv…
N,O -Bis(trimethylsilyl)-α-amino acids ( N,O -BTMS-AA), mediated by o -phenylene phosphorochloridate (PPC), could oligomerize into polypeptides. The mechanism might go through sequential steps, i.e., the activation of amino acid, the elongation of peptide chain, and the termination of elongation reaction, as can be tr…
TiO2 photocatalysis and ultrasound are emerging technologies for the mineralization of pollutants in water. To further investigate these technologies and to assess whether advantages and synergy can be expected from their differences, phenyltrifluoromethylketone (PTMK) was selected as a test compound for pollutants ge…
A series of thiophene-appended Ru II (bpy) 3 derivatives, Ru(1) 3 , Ru(2) 3 , Ru(3) 3 , Ru(bpy) 2 (1), and Ru(bpy) 2 (2), and their resulting polymers have been synthesized and characterized. The bpy ligands 5,5′-bis(5-(2,2′-bithienyl))-2,2′-bipyridine, 1, 4,4′-bis(5-(2,2′-bithienyl))-2,2′-bipyridine, 2, and 4-(5-(2,2…
The total structure factors of the molten trivalent metal halides MX 3 , where M 3+ denotes La 3+ or Ce 3+ and X - denotes C1 - , Br - or I - , have been measured by using neutron diffraction. Difference function methods were then applied on assuming that the LaX 3 and CeX 3 melts for a given halide ion are isomorphic…