Materials Literature
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Pseudomonas cepacia is known as a rock phosphate (RP) solubilizer in bioreactors and in soils. The objectives of this study were to determine the production rates of gluconic acid (GA, pK d 3.41) and 2‐ketogluconic acid (KGA, pK d 2.66) by the bacteria in the presence of clay minerals which prevail in soils, and the r…
Abstract Thermoelectric performance of polyaniline can be improved by formation of multilayered film structure. The alternatively layered films are composed of electrically insulating emeraldine base layers and electrically conducting (±)-10-camphorsulfonic acid (CSA)-doped emeraldine salt layers. The multilayered fil…
We consider alignment of a symmetric diblock copolymer melt thin film or bulk phase by an electric field using a capacitor analogy. For the lamellar phase we show that alignment of the lamellae in the direction perpendicular to the bounding electrodes, compared to parallel alignment, occurs for thicker films. For thin…
Donor- and acceptor-substituted alkynylated chromium carbonyl arene complexes Cr(CO) 2 L( η 6 -R 1 -C 6 H 4 )(C⋮C) n R 2 ( 1, n = 1, L = CO, PPh 3, R 1 = H, o -formyl, R 2 = p -C 6 H 4 -NMe 2, p -C 6 H 4 -NO 2, ferrocenyl; 3, n = 2, L = CO, R 1 = H, R 2 = p -C 6 H 4 -NMe 2, p -C 6 H 4 -NO 2, ferrocenyl) are easily acc…
Data are presented on real time (VISAR) measurements of the spall fracture of copper for various pulse durations and tensile strain rates at the spall plane. The impactors consist of Teflon, Y-cut quartz, and a tungsten heavy alloy. VISAR data are compared with finite-difference calculations employing a rate-dependent…
Europium(III) (7)F(0) --> (5)D(0) excitation spectroscopy is used to determine if the anions carbonate and phosphate present in physiological fluids are able to displace water molecules from the first coordination sphere of Eu(3+) analogues of Gd(3+) MRI contrast agents. A lengthening of the Eu(3+) excited state lifet…
A small- and wide-angle X-ray scattering study was performed on two metallocene catalyzed isotactic polypropylene (miPP) resins. The results were compared with two similar molecular weight Ziegler–Natta catalyzed isotactic polypropylene (zniPP) materials. Wide-angle X-ray diffraction (WAXD) results showed the existenc…
In this work, several PS/HDPE (high density polyethylene), PS/LLDPE (linear low density polyethylene) and PS/ULDPE (ultra low density polyethylene) blends were prepared in a composition range were atactic polystyrene (PS) was always the matrix component. All the types of polyethylenes employed, when dispersed into dro…
Grain growth kinetics for nanostructured nickel was studied by means of isothermal and isochronal annealing and TEM. The range of temperature for the isothermal and isochronal annealing has been selected between 603K and 683K. The isothermal curves for grain size show that an explosive grain growth occurs in the early…
Nanometer‐sized BaTiO 3 powders have been synthesized hydrothermally from Ba(OH) 2 and titanium alkoxide at 150°C for 2 h, and the Ba/Ti ratio has been measured with an accuracy of ±0.003. Stoichiometric powders can be obtained by adjusting the Ba/Ti ratio of the reactants to a value of 1.018. At a lower Ba/Ti ratio,…
Differential scanning calorimetry (DSC) can be used to infer the distribution of lamellar crystal thickness l. For homopolymers, the relation between melting temperature T and thickness is described by the Gibbs relation. In this case the weight distribution function of thickness g(l) ∝ P(T)(T − T)2, where P(T) is DSC…
The molecular and electronic structure of the planar nickel dithiolene (1c, R = H) and of related complexes derived from nickel dithiolene by replacement of Ni by Pd (palladium dithiolene, 2c, R = H) or by Pt (platinum dithiolene, 3c, R = H), or by replacement of S by NH (nickel diiminolene, 1a, R = H), O (nickel diox…
Abstract Polymeric porous membranes were prepared from polytetrafluoroethylene (PTFE) fine powder by a series of mechanical operations, such as extrusion, rolling, and stretching. The structure of the prepared porous membrane was well characterized by a spatial periodicity of nodes (domain of agglomerated PTFE particl…
The phase behavior of colloid-polymer mixtures, and of solutions of globular proteins, is often interpreted in terms of a simple model of hard spheres with short-ranged attraction. While such a model yields a qualitative understanding of the generic phase diagrams of both colloids and proteins, it fails to capture one…
In this study, sintered glass‐ceramics made up of jarosite (a hazardous industrial waste) have been obtained by sintering high‐iron‐content glasses. Thermal gravimetry and differential thermal analysis, carried out in different atmospheres, have been utilized to explain the phase formations in the volume and iron oxid…
The susceptibility of ${(\mathrm{S}\mathrm{m}}_{0.65}{\mathrm{Sr}}_{0.35}{)\mathrm{M}\mathrm{n}\mathrm{O}}_{3}$ shows an unusual temperature dependence above the Curie temperature which is attributed to the presence of small manganese-ion clusters with $S\ensuremath{\approx}9.$ A field-induced transition is observed i…
Photoelectrochromic “smart” window technology is extended to include the use of flexible substrates and solid‐state electrolytes. This should facilitate their application as retrofit modifications of office windows, where, by blocking incoming solar irradiation, they could substantially lower air‐conditioning costs. T…
The infrared absorption spectra of polycrystalline ${\mathrm{LaMnO}}_{3}$ and ${\mathrm{CaMnO}}_{3}$ measured in the frequency range of the transverse optical phonons are reported, discussed, and compared with calculations of the lattice dynamics. For ${\mathrm{LaMnO}}_{3}$ the measured spectrum is consistent with the…
Our objective in the series of the present work is to obtain a type of magnet in which the weight average of ferromagnetic and ferrimagnetic characters is precisely controlled by fine tuning of the composition. For this attempt, we have prepared the $({\mathrm{Ni}}_{x}^{\mathrm{II}}{\mathrm{Mn}}_{1\ensuremath{-}x}^{\m…
The compatibilizing effect of anhydride groups attached to a polyester was examined while blending soy protein and a biodegradable polyester. Three different polyesters grafted with anhydride functional groups were used as compatibilizers for blending with soy protein concentrate, soy flour, and soy isolate. The proce…