Materials Literature
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Quicklime or burnt lime (CaO), is a highly soluble liming material recognized as an acceptable means for neutralization of acid soils in the United States. Blending CaO and MgO with agricultural lime (CaCO3) may prove an alternative to ground agricultural limestone for raising soil pH and providing fertilizer Ca and M…
The use of intermetallic alloy precursors is explored as a new means to synthesize complex transition and refractory metal nitrides, carbides, and related phases. The conditions under which model single-phase Cr 3 Pt and two-phase Cr 3 Pt-dispersed Cr alloys form Cr 3 PtN antiperovskite when thermally nitrided were st…
Abstract The permeation, diffusion, and sorption of dimethyl ether into a series of commercial fluoroelastomers were characterized at various pressures and temperatures. The polymers under study were based on tetrafluoroethylene and contained various amounts of other perfluorinated monomers: perfluoromethylvinylether,…
Extensive studies on lipase catalyzed polymerization of ϵ‐caprolactone showed that porcine pancreas lipase (PPL) gave good conversions and molecular weights of the order of 11,000. Various attempts were also made to prepare higher molecular weight polycaprolactone esters and to increase the molecular weights of polyca…
We present and compare the results of temperature-dependent electron paramagnetic resonance (EPR) studies on Pr 1− x Ca x MnO 3 for x = 0.64, which is electron-doped, with results of studies on the hole-doped, x = 0.36 composition. The temperature dependence of the various parameters obtained from the powder and singl…
The effect of perfluoroalkane sulfonic acid on the flame retardancy of polycarbonate (PC) has been studied. In particular, the very small amount of additives to restrain the combustion, as well as the thermal degradation path, was focused on. The flaming combustion times of PC blended with 100 ppm of the strong acid s…
The title compound, dilanthanum dihydrogen hexamolybdoplatinate(IV) hexadecahydrate, La2[H2PtMo6O24]·16H2O, was obtained by reacting La(NO3)3·6H2O with a sodium salt solution of [HnPtMo6O24](8−n)− at pH 2.0, and it was found to crystallize in the monoclinic system in space group C2/c, with the polyanion having the le…
1,4-Anhydroerythritol ( 1a ) and 1,4-anhydro- l -threitol ( 1b ) were polymerized using trifluoromethanesulfonic acid (CF 3 SO 3 H) or fluorosulfonic acid (FSO 3 H) as a cationic initiator. The polymerizations of 1a and 1b proceeded through a ring-opening reaction with a proton-transfer reaction to produce hyperbranch…
The 13 C CP/MAS NMR, X-ray diffraction, and Raman spectroscopies were used for monitoring the structural transition of Samia cynthia ricini ( S. c. ricini ) silk fibroin induced by stretching. Here the silk fibroin was obtained from the aqueous solution stored in the silk gland. All of these spectroscopic data indicat…
This work reports the synthesis and electrical characterization of Bi4Ti3O12 ceramics produced successfully by a new method based on a CO2 laser sintering process. The structural and microstructural characterizations revealed that this method is able to produce sintered samples with high quality, free from secondary p…
The dynamics of soft colloidal particles in a concentrated suspension was studied by two color dynamic light scattering. The short-time diffusion coefficient, D(s)(q), revealed a weak slowing down around the peak of S(q) in contrast to the much stronger dependence observed in hard sphere systems, and the absence of an…
Oxidized, cut single-walled carbon nanotubes (SWNTs) have been reacted with lanthanide salts containing Eu, La, and Tb. These studies are aimed at developing a fundamental understanding of the coordination chemistry of metal ions and of metal ion complexes onto the surfaces of nanotubes. It has been found that the lan…
The effect of intermolecular hydrogen bonding on the crystallization kinetics and the morphology of poly(ε-caprolactone) (PCL)/4,4‘-thiodiphenol (TDP) blends with TDP content 0−20 wt % has been investigated by differential scanning calorimetry, polarizing optical microscopy, X-ray measurements, and in situ FT-IR. The…
The formation and resorption of CaCO(3) by epithelial cell layers require epithelial transport of protons. We used the anterior sternal epithelium of the terrestrial isopod Porcellio scaber as a model to study the expression pattern and immunolocalization of a V-type H(+)-ATPase during the mineralization and demineral…
The 2-haloalkanoic acid dehalogenase (HAD) family, which contains both carbon and phosphoryl transferases, is one of the largest known enzyme superfamilies. HAD members conserve an alpha,beta-core domain that frames the four-loop active-site platform. Each loop contributes one or more catalytic groups, which function…
An extended vapour–liquid–solid (VLS) growth method, which is the reaction of a mixture of nitrogen and ammonia gas over nanoscale Fe–B 'catalyst' particles at 1100 °C, has been developed. With this method, BN nanotubes of diameter about 20 nm have been prepared and well characterized by high-resolution transmission e…
The number of redox-active and inactive Mn and Co species in MeAPO-5 and MeAPO-18 (Me = Mn, Co) was measured from H 2 consumption rates during H 2 temperature-programmed reduction (H 2 -TPR), and their structure and oxidation state were probed at identical conditions by UV−visible and X-ray absorption spectroscopies.…
Correlations are established between structural, thermal, and flexibility data of crystalline, locally flexible polymers giving rise to mesomorphic phases, which can be usefully organized in two classes. While in all mesophases the chain conformation is substantially disordered, in class 1 chain packing is characteriz…
Indium tin oxide (ITO) thin films were deposited using the e-beam evaporation method on amorphous and crystalline substrates under identical conditions. The properties of the films were investigated using optical transmittance, XRD and XPS techniques. It was found that the properties of the films depend strongly on th…
We investigate numerically the low-temperature equilibration of glassy systems via nonlocal Monte Carlo methods. We reexamine several systems that have been studied previously and investigate new systems to test the performance of such methods near the putative Kauzmann temperature, T K, where the configurational entr…