Materials Literature
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As part of a comprehensive analysis of the effects of carbon dioxide partial pressure (pCO2) and culture pH on medium osmolality (manuscript in preparation), we discovered substantial errors in the osmolality values that we previously reported for cultures at elevated pCO2. As shown in Table 1, the corrected osmolalit…
The NO 2 gas-sensing characteristics of chemiresistors in the form of multilayered Langmuir−Blodgett films of a symmetrically substituted phthalocyanine, containing on the periphery four amidic groups −CONH−, have been studied. Floating layers were spread onto the water surface from a chloroform solution and were tran…
This paper presents a model for predicting pressure losses in foams of various expansions and pressures, in pipes of any given diameter, once the foam behavior has been characterized at a single expansion and pressure. The model incorporates a modified form of the power-law viscosity model of foam, which is obtained t…
Foam separation may have potential for protein recovery. However, for foam separation to be a viable protein recovery technique it is important to demonstrate, not only that high enrichments and recoveries can be achieved for single proteins, but also that high enrichments and recoveries, together with selectivity of…
Macromolecular Gd(III) complexes may find useful application as contrast agents for magnetic resonance angiography (MRA). Herein two novel systems are reported, namely Gd(DO3ASQ)3-lys16 and Gd(DO3ASQ)30-orn114. Their syntheses are based on the ability of the squaric acid moiety to act as a linker between the DO3A (1,4…
Thiol-reactive lanthanide complexes have been synthesized that are luminescent when bound to terbium and/or europium. The complexes consist of a diethylenetriaminepentaacetate (DTPA) chelate covalently joined through one amide bond to a chromophore, carbostyril 124, and via a second amide bond to a maleimide, bromoace…
We study the relaxation to equilibrium of two dimensional islands containing up to 20000 atoms by Kinetic Monte Carlo simulations. We find that the commonly assumed relaxation mechanism - curvature-driven relaxation via atom diffusion - cannot explain the results obtained at low temperatures, where the island edges co…
Homogeneous blends of corn gluten meal (CGM) and "polar" plasticizers (water, glycerol) or "amphiphilic" plasticizers [octanoic and palmitic acids, dibutyl tartrate and phthalate, and diacetyl tartaric acid ester of mono-diglycerides (DATEM)] were obtained by a hot-mixing procedure. The glass transition temperature (T…
Cooling electronic devices can often be necessary to optimize performance. Traditional approaches to cooling are typically based on thermodynamic cycles involving compression and expansion of refrigerant gases (such as Freon). The heat required for vaporization is drawn from the materials or the volume (for example, a…
Aqueous methyldioxorhenium (MDO), prepared from methyltrioxorhenium (MTO) and hypophosphorous acid, abstracts an oxygen atom from tertiary alkyl hydroperoxides. This regenerates MTO and forms the tertiary alcohol with rate constants 3.71 × 10 4 L mol - 1 s - 1 ( t -BuOOH) and 3.47 × 10 4 L mol - 1 s - 1 ( t -AmOOH) at…
Four kinds of new π-conjugated copolymers of electron-donating thiophene with highly electron-withdrawing pyrido[3,4- b ]pyrazine derivatives have been prepared by using the Stille reaction and electrochemical oxidative polymerization in high yields, and their optical and electrochemical properties have been compared…
Highly dispersed gold catalysts on a titanium-containing support are promising catalysts for the low-temperature direct epoxidation of propene. Gold dispersed on TS-1 and other titanium-based support materials has been used to selectively (>99%) epoxidize propene using a hydrogen−oxygen mixture. The propene conversion…
We investigate the effective properties (conductivity, diffusivity and elastic moduli) of model random composite media derived from Gaussian random fields and overlapping hollow spheres. The morphologies generated in the models exhibit low percolation thresholds and give a realistic representation of the complex micro…
The effect of phosphate ions on the corrosion of iron in sulphate solutions at different temperatures (293 K, 313 K, 333 K and 353 K) and at different pH (pH=2.1, 7.2 and 12.3) values was investigated. The electrochemical three-electrode technique was employed. The cathodic and anodic current-potential curves were obt…
Bentonite and illite were interacted with nonyl- and dodecylammonium salt solutions to see how the alkylammonium ions became attached and oriented within the interlamellar space of the clays. X-ray diffraction analyses were carried out to obtain information on the interlamellar organization and orientation of the adso…
The role of hydrophobic particles in mineral oil-based defoamers was investigated by fluorescence labeling and microscopy. Defoamer emulsion droplets in water adhere to the air/water interface to become lenses that nucleate bubble coalescence. Fluorescent labels were covalently bonded to silica, and confocal laser sca…
The MoO 3 /CeO 2 system has been studied by diffuse reflectance infrared Fourier transform and Raman spectroscopies. CeO 2 surface is usually terminated with the surface hydroxyl groups, carbonate species, and adsorbed water in air. IR spectra indicate that the dispersion of MoO 3 onto the CeO 2 surface can displace t…
Low-level radioactive waste (LLW) arises in the normal operation of nuclear power plants and fuel cycle facilities, as well as from the use of radioactive isotopes in medicine, industry and agriculture. This report sets out the costs of operating disposal sites for LLW in OECD countries, as well as the factors that ma…
Antimony trihydride(stibine), SbH 3, and antimony trideuteride, SbD 3, were synthesized in high yields via a unique nonaqueous synthetic route. A study comparing the relative thermal stability of SbD 3 with that of SbH 3 was performed. Deuterated stibine displays significantly greater thermal stability than its hydrid…
A series of chalcogen atom substituted porphyrazines have been assembled and characterized. Oxygen and sulfur chalcogen atoms have been substituted for peripheral methylene groups. Heteroatom-enriched, seven-membered ring dinitriles (1–3) were synthesized and characterized by IR, MS, UV-vis, 1H NMR, elemental analysis…