Materials Literature
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The continuous ultrasonic devulcanization of natural rubber (NR) filled with various concentrations of carbon black (CB) indicated a minimum of crosslink density and gel fraction at an intermediate amplitude, which is independent of CB content. An attempt was made to improve the efficiency of devulcanization by use of…
Anodic film growth in the passive region was studied using the electrochemical quartz crystal microbalance (EQCM) technique. Samples were produced using physical vapor deposition with the compositions of a 304L stainless steel with additions of 20 atom % Cr, Mo, or W. By simultaneous in situ recording of mass and curr…
The use of perfluoroalkyl-substituted cobalt complexes as catalysts for the oxidation of alkyl aryl sulfides with molecular oxygen/2,2-dimethypropanal has been studied in a fluorous organic biphasic system. The addition of very small amounts of a CoII−tetraarylporphyrin (Co-4) led to increased substrate conversions (6…
Stereospecific formation of the chiral heterodinuclear 3d–4f complexes (Λ–Δ)-[(acac)2Cr(ox)Ln(HBpz3)2] (acac− = acetylacetonate, ox2− = oxalato, HBpz3− = hydrotris(pyrazol-1-yl)borato; Ln = Yb: 1, Dy: 2 where (Λ–Δ) implies the absolute configuration around the octahedral Cr and square antiprismatic Ln moiety, respecti…
We present a generalized finite element model of magnetostriction phenomena where the direct and inverse effects are taken into account. The variational formulation in terms of magnetic vector potential and displacement is used to solve this coupled problem. Different computing steps in 3D and 2D cases are reported.
Small copper(I) oxide, Cu2O, particles dispersed in diamine-terminated poly(ethylene oxide) (PEO-NH2) matrices have been successfully prepared by vacuum evaporation of copper on to molten PEO-NH2, followed by heat treatment. The obtained composites were characterized by TEM, electron diffraction, viscometry, TG–DTA an…
The structural characteristics of several modulations of Al–Co–Ni decagonal quasicrystals and crystalline approximants, all of which are found in and around an Al–Co–Ni decagonal phase with a wide compositional range, are discussed systematically. The structures of a Ni-rich basic structure and the other modulations a…
The organic low- k hybrid-organic-siloxane-polymer (HOSP ® ) has been investigated as an intermetal dielectric. The presence of Si-H and bonds instead of partial Si-O bonds lowers the dielectric constant compared to conventional siloxane-based spin-on glass. However, dielectric degradation occurs due to the destructio…
Galactosemia is an inherited disorder characterized by an inability to metabolize galactose. Although classical galactosemia results from impairment of the second enzyme of the Leloir pathway, namely galactose-1-phosphate uridylyltransferase, alternate forms of the disorder can occur due to either galactokinase or UDP…
The liquid crystalline (LC) order appears in a variety of polymer systems, such as solutions of rod-like molecules (DNA, TMV), solutions of semiflexible molecules (long fragments of DNA), block-copolymer melts, main-chain and side-chain liquid crystalline polymer melts etc. Many LC phases have been observed in these s…
Capability of oxygen store and release of ceria-zirconia solid solution made by attrition mill process was measured by thermo-gravimeter with 1mass% of Pt. Ceria-zirconia solid solution made by conventional heating method of ceria powder with zirconium salt was also characterized for comparison. Capability of oxygen s…
We performed confocal micro Raman spectroscopy of an individual single-wall nanotube. Isolated SWNTs are prepared by a chemical vapor deposition method on a Si/SiO2 substrate containing iron catalyst particles of nanotube size. We show that resonant confocal micro Raman spectroscopy of an (n, m) individual single-wall…
The solubility of a drug in an aqueous medium is a key parameter in preformulation studies [1]. Usually, the concentration at saturation is determined by adding an excess of drug substance into the...
(ET)3Cl(pBIB) (ET = bis(ethylenedithio)tetrathiafulvalene, pBIB = p-bis(iodoethynyl)benzene) salt is a unique organic metal containing supramolecular assemblies based on the pBIB molecule and the Cl anion. We newly prepared chloride and bromide ET cation radical salts with the use of di- and tetra-substituted pBIB der…
The calixarenes tert-butylcalix[6]arene (H6L) and tert-butylcalix[8]arene (H8L′) on treatment with [V(NBut)(OBut)3] and [V(Ntolyl-p)(OBut)3] respectively afford the novel metallocalix[6] and [8]arenes [{V(NBut)(thf)0.39(ButOH)0.61}{VO(μ-O)}2L][ButNH3] (1) and [V2(NR′)2(H2L′)] (2).
The synthesis and both spectroscopic and electrochemical studies of a bis-porphyrinic tweezer are reported, as well as the insertion of Lewis base guests into the host bis-porphyrinic cavity, monitored through physico-chemical characteristics.
Rhamnolipids and poly(beta-hydroxyalkanoic acids) (PHAs) are important fermentation products of Pseudomonas aeruginosa. Both contain beta-hydroxyalkanoic acids as main constituents. To investigate the possible relationship between their syntheses, we studied the n-hexadecane fermentation by P. aeruginosa (ATCC 10145).…
Studies have been made of the addition of cyclohexane (CHX) to O2 + tetramethylbutane (TMB) mixtures between 673 and 773 K in aged boric-acid-coated Pyrex vessels to obtain kinetic data for the reaction of HO2 radicals with CHX. The contribution by OH radicals to the removal of CHX is minimised by the use of a total p…
Alkyd resins of 40% (I), 50% (II), and 60% (III) oil length (OL) were prepared with rubber seed oil (RSO), phthalic anhydride (PA), and glycerol (GLY), employing the two-stage alcoholysis method. Changes in the physical characteristics of the reaction medium were monitored by determination of the acid value and the nu…
Well-stereocomplexed 1:1 fiber and film were prepared from poly(L-lactide) (PLLA) and poly(D-lactide) (PDLA) by the melt-spinning and hot-drawing and the solution-casting methods, respectively, and their hydrolysis in phosphate-buffered solution (pH 7.4) at 37°C was investigated. The decrease rates of weight remaining…