Materials Literature
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Abstract The interfacial adhesion between four different forms of jute fibers (sliver, bleached, mercerized and untreated) and polyolefinic matrices (LDPE and PP) was studied, as a critical factor affecting the mechanical behavior of these composites. The fiber‐matrix adhesion was estimated by means of the critical fi…
A new denitrifying chemoorganotrophic bacterium capable of aerobic and anaerobic degradation of poly(3-hydroxybutyrate) (PHB) and poly(3-hydroxybutyrate-co-hydroxyvalerate) (PHBV) was isolated from activated sludge. A phylogenetic analysis based on 16S rDNA sequences indicated that the new isolate is a member of the b…
Molecular dynamics simulations of two series of single copolymer chain models with precisely controlled methyl branching and with branches of different lengths are performed. For the models with precisely controlled methyl branching, the collapse process and the morphology of the lamellar structure are similar to thos…
Abstract Nacrite and dickite are found in two localities in northern Taiwan. One, containing nacrite and dickite, is associated with a gold-enargite deposit as a vug-filling clay in the Chinkushih (CKS) mine district near the northern coast. The other is the occurrence of dickite in the interstices of a Miocene coarse…
Multi-domain homeotropic liquid crystal alignment has been recognized as an alignment method to achieve wide viewing angle for thin-film-transistor liquid crystal displays (TFT-LCDs). In the past decade, several types of multi-domain homeotropic TFT-LCDs have been well studied. In all these LCDs, a homeotropic polyimi…
The kinetics of the reactions of the flavylium ion 1a and the 4′-methoxyflavylium ion 1b with various π-nucleophiles and tributylstannane were investigated photometrically in dichloromethane. Electrophilicity parameters E(1a) = −3.46 and E(1b) = −4.96 were derived from the equation log k (20 °C) = s(E + N); these allo…
Naturally colored camel brown and olive green cottons are cultivated and their physical properties studied. The ash content of these cottons is higher than for J-34 white cotton, due to the presence of more heavy metals. The limited oxygen index value of naturally colored cottons is also higher than for white cotton,…
Three derivatives of 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetrakis(methylene phosphonic acid) (DOTP) containing a hydrophobic substituent on one side chain were prepared and their lanthanide complexes examined by NMR. The new ligands include 1-(1-octyl-methyl-phosphonic acid)-4,7,10-tris(methylene phosphonic acid)-…
We successfully synthesized carbon nanotubes with very small diameters (5–10 nm) at room temperature by using high energy laser pulses (193 nm, 5 J/cm 2 and 20 ns duration time) to re-excite the carbon species contained in the laser ejected plume. The carbon nanotubes, which presumably formed in gas phase, were prefer…
A thermodynamically consistent phase-field model with memory, based on the linearized version of the Gurtin-Pipkin heat conduction law, is considered. The formulation of an initial and boundary value problem for the phase-field evolution system is framed in a history space setting. Namely, the summed past history of t…
Vacuum sublimed thin films of copper phthalocyanine wereprepared at room temperature. The optical properties of thin CuPc filmshave been investigated in the spectral range 200-2100 nm. The refractiveindex n as well as the absorption index k were calculated before and afterannealing. It is obvious that the refractive i…
The photodynamic therapy (PDT) related photophysical properties of five palladium(II) porphyrins with increasing steric demand of the meso-substituents were investigated by steady state and time-resolved absorption and luminescence spectroscopy. The steric strain of the meso-substituents is reflected in a bathochromic…
Orotidine 5'-phosphate decarboxylase (ODCase) is the most proficient enzyme known, enhancing the rate of decarboxylation of orotidine 5'-phosphate (OMP) by a factor of 10(17), which corresponds to a DeltaDeltaG++ of approximately 24 kcal/mol. Ground-state destabilization through local electrostatic stress has been rec…
Abstract The ratio of the pure‐component solubility of a primary solute to that of an impurity in the same solvent has a dramatic impact on crystal purity when lattice substitution is the dominant mechanism of impurity incorporation in the crystal. This is demonstrated for a model system of isoleucine and leucine in w…
Abstract Muscovite-kaolinite intergrowths found in Albian sandstones of the Basque Cantabrian basin (northern Spain) were studied by optical, scanning and electron microscopy and electron microprobe analysis. Kaolinitization begins at grain edges, forming the characteristic fanned-out textures, and propagates toward t…
A new and general synthetic strategy for thiophene-based condensed aromatics(see Figure) is described. A tandem cyclization scheme produces aromatized monomers in situ, prior to oxidative polymerization. The poly(naphthodithiophene)s are a family of highly stable and polarizable scaffolds whose polymer backbone energe…
Abstract A novel spin crossover Fe(III) complex, [Fe(H3L)](ClO4)3·(4-fim)·H2O (H3L = tris[2-(((imidazol-4-yl)methylene)amino)ethyl]amine, 4-fim = 4-formylimidazole), was synthesized and the crystal structure was determined at 293 K. Cryomagnetic measurements revealed a two-step spin conversion and a pressure induced s…
Well-ordered Georgia kaolinite (Kga-1b) obtained from the source Clay Repository of the Clay Minerals Society (USA) was intercalated with urea using grinding procedures. To achieve complete intercalation 20% of urea (in weight) was used, producing Al2Si2O5(OH)4 (N2H4CO)0,86 with an interplanar basal spacing of 1,08nm.…
Abstract Mechanical properties and morphologies of nylon 11/ethylene‐octene copolymer blends have been investigated. The ethylene‐octene copolymer (POE) employed in this study was grafted with maleic anhydride (MAH) and thus has the potential to react with the amine group of nylon 11. Nylon 11/POE‐g‐MAH and nylon 11/P…
The effect of the addition of Bi 2 O 3 on the densification, low‐temperature sintering, and electromagnetic properties of Z‐type planar hexaferrite was investigated. The results show that Bi 2 O 3 additives can improve the densification and promote low‐temperature sintering of Z‐type hexaferrite prepared by a solid‐st…