Materials Literature
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Nanotube alignment has been found to be one of the key parameters to explain the mechanical properties of carbon nanotube fibres. However, the question of the homogeneity of the alignment across the fibre diameter is still open. This letter reports on the first microdiffraction study of the alignment of nanotubes acro…
Serine hydroxymethyltransferase (SHMT) belongs to the alpha-family of pyridoxal 5'-phosphate-dependent enzymes and catalyzes the reversible conversion of L-Ser and tetrahydrofolate to Gly and 5,10-methylene tetrahydrofolate. 5,10-Methylene tetrahydrofolate serves as a source of one-carbon fragment in many biological p…
Preparation, structural investigation by neutron powder diffraction, and ferroelectic studies of an ordered perovskite BaBi0.53+(Bi0.25+Nb0.35+)O3 have been reported. This compound has rhombohedral structure with a centrosymmetric space group R3̄. Although the average structure is centrosymmetric, it exhibits ferroele…
The electronic structure, chemical bonding, geometry, and effects produced by Sr-doping in CaCO(3) have been studied on the basis of density-functional theory using the VASP simulation package and molecular-orbital theory utilizing the CLUSTERD computer code. Two calcium carbonate structures which occur naturally in a…
The redox properties of MCl2 (M=Mn, Fe, Co) acetonitrile solvates were electrochemically and spectroscopically characterized. The three voltammogram waves at 0.86, 0.48, and 0.21 V versus SCE for FeCl(2) dissolved in MeCN are assigned as one-electron reduction potentials for [Fe(II)Cl(x)(NCMe)4-x]2-x (1<or=x<or=3), re…
Doubly bridged mu-alkoxo-mu-X (X = pyrazolato or acetato) dinuclear MnIII complexes of 2-hydroxy-N-{2-hydroxy-3-[(2-hydroxybenzoyl)amino]propyl}benzamide) (H5L1) and 2-hydroxy-N-{2-hydroxy-4-[(2-hydroxybenzoyl)amino]butyl}benzamide (H5L2), [Mn2(L)(pz)(MeOH)4].xMeOH (1, L = L1, x = 0.5; 2, L = L2, x = 0; Hpz = pyrazole…
Synthesis and reversible redox interconversion between core-modified [32]heptaphyrin (1.1.1.1.1.0.0) and [30]heptaphyrin (1.1.1.1.1.0.0) are reported.
Batch-fabricated SiC nanowires were heated under an ammoniac flow up to 1400 °C. The ensuing product was characterized by SEM, HRTEM, EDX and XRD. As we found, SiC nanowires were completely converted into faceted α-Si 3 N 4 nanorods with diameters ranging from 10 to 500 nm and lengths lower than 10 µm. These nanorods…
Here we report on results of a spin-resolved photoelectron spectroscopic (SRPES) study of ${\mathrm{YCo}}_{2}$ thin films (150 \AA{}-thick) grown on a W(110) substrate. The films were prepared by co-deposition of stoichiometric amounts of Y and Co onto a clean W surface followed by thermal annealing leading to ($2\ifm…
Abstract The photophysical and photochemical properties of two 3,3‐diphenyl‐3H‐naphtho[2,1‐b]pyrans substituted in position 8 by phenylethynyl and p ‐nitrophenylethynyl groups, respectively, are investigated by femtosecond and nanosecond transient absorption spectroscopy. The spectral characteristics and dynamics of t…
Classical nucleation theory pictures the homogeneous nucleation of a crystal as the formation of a spherical crystalline embryo, possessing the properties of the macroscopic crystal, inside a parent supercooled liquid. In this work we study crystal nucleation in moderately supercooled sulfur hexafluoride by umbrella s…
Abstract In this study, the oxidative polycondensation reaction conditions of 4‐[(4‐methylphenyl)iminomethyl]phenol (4‐MPIMP) were studied by using oxidants such as air O 2 , H 2 O 2 , and NaOCl in an aqueous alkaline medium between 50 and 90°C. The structures of the synthesized monomer and polymer were confirmed by F…
Abstract Ultrafine fiber mats of hydroxypropyl methyl cellulose phthalate (HPMCP) were successfully electrospun and explored as drug delivery vehicles using erythromycin as a model drug. The morphology of the electrospun fiber and the drug release process in the artificial gastric juice and in the artificial intestina…
Abstract The combination of tin carboxylate heat stabilizer and a dimethylaminopropyl methacrylamide‐titanate adduct enables anaerobic landfill decomposition of plasticized poly(vinyl chloride) (PVC). Through a mechanism as yet not understood, the above combination directs decomposition under anaerobic conditions to c…
The title 1,4-dioxane solvate, C8H4FNO2·C4H8O2, was isolated during a manual crystallization screen on 7-fluoroisatin (7-fluoroindoline-2,3-dione). The 7-fluoroisatin molecule occupies a general position and each of the independent molecules of 1,4-dioxane is disposed about a centre of inversion, with half of eac…
Abstract Bismaleimides with main chains of different structures were prepared by the reaction between maleic anhydride and various diamines and by the reaction between 4‐maleimidobenzoylchloride and 3,5‐dihidroxybenzoic acid. The monomers were characterized with IR and 1 H‐NMR spectroscopy. Polymers based on these com…
We investigate the single-particle orientational dynamics of rodlike molecules across the isotropic-nematic transition in computer simulations of a family of model systems of thermotropic liquid crystals. Several remarkable features of glassy dynamics are on display including nonexponential relaxation, dynamical heter…
Abstract This paper deals with the problem of T‐bar penetration. New kinematically admissible velocity fields are derived from elastic solutions of incompressible material using Airy stress function. These velocity fields are used to obtain upper bounds to collapse loads. Two particular solutions are presented, one fo…
It is well established (from which the general interest arises!) that nanomaterials (NM) display properties and behavior that can be very different compared to the corresponding bulk materials of the same chemical composition. Size, shape, and surface state are properties accounting for most of their differences (1,2)…
Abstract Nanosilica (SiO 2 ) is used as a reinforcing filler in PP/elastomer thermoplastic polyolefin (TPO) blends containing ethylene‐octene polyolefin elastomer (POE), ethylene‐propylene rubber (EPR), and maleated EPR. The localization and dispersion of the filler are controlled by adding maleated derivatives to the…