Geoengineering is the deliberate large-scale manipulation of environmental processes that affects the Earth's climate, in an attempt to counteract the effects of climate change. Injecting sulfate aerosol precursors and designed nanoparticles into the stratosphere to (i.e., solar radiation management [SRM]), has been suggested as one approach to geoengineering. Although much is being done to unr...

We report the solution-based synthesis of single-crystalline nanorods composed of barium titanate (BaTiO3) and strontium titanate (SrTiO3), which yields well-isolated nanorods with diameters ranging from 5 to 60 nm and lengths reaching up to >10 mum. Electron microscopy and diffraction measurements show that these nanorods are composed of single-crystalline cubic perovskite BaTiO3 and SrTiO3 wi...

Fecal tagging can obviate the need for bowel cleaning prior to MR colonography (MRC). Aim of this study was to optimize a barium-based fecal tagging model for MRC. 10 volunteers underwent MRC on 9 separate occasions using different tagging protocols. Amount, concentration and time range of the barium ingestion was varied. SI values of colonic feces was measured. Maximal reduction of the fecal m...

This paper describes the 3D printing of a ternary composite polydimethylsiloxane (PDMS) and nanoparticles iron oxide barium titanate. The was printed using commercially available printer. Thermal curing during allowed for overall low process times few minutes. Scanning electron microscopy indicated uniform layers. resulting films showed ferromagnetic behaviour, applicability in magnetic actuati...

Abstract This paper presents a new solution to use the cathode ray tube glass wastes for iron oxide rich waste vitrification. The obtained glass-ceramics, synthesized at three heat treatment temperatures: 800, 900 and 1000 °C were characterized in terms of effect CRT addition upon dimensional stability, apparent porosity density, chemical stability lead barium ions retention capacity.

Co-doping of yttrium doped mixed barium cerate/zirconate perovskite (BCZY) with small amounts of Pr (BCZYP) substantially increases electrical conductivity while retaining structural and chemical stability. BCZYP is predominantly a proton conductor at temperatures up to 600-650 ̊C, whereas it is a mixed proton/oxide ion/electron conductor at higher temperatures. The co-doped BCZYP perovskite can...

This paper reports a prototype of a mechanically and thermally robust encapsulated microfabricated thermionic energy converter (μ-TEC). We used conformal sidewall deposition of poly-SiC to form stiff suspension legs with U-shaped cross sections, which increase the out-of-plane rigidity and prevent contact with the substrate during the heating of the suspended emitter—a qualitative improvement o...

We investigate the stability of aqueous barium titanate suspensions as a function of dispersant architecture, ionic strength, counterion valency, and particle size. Both pure polyelectrolytes, poly(acrylic acid) and poly(methacrylic acid) (PMAA), and comb polymer dispersants composed of a PMAA backbone with methoxy-poly(ethylene oxide) (mPEO) teeth of varying molecular weights are studied. Whil...

The conventicnal sulfate determination by gravimetrically precipitating barium sulfate is very tedious and time consuming. The present technique uses an ion exchanger so the sulfate can be titrimetrically determined as sulfuric acid. An analysis can be completed in 30 minutes. This method is being used for the routine analysis of sulfate in mixtures of gypsum, anhydrite, calcium oxide, and calc...

Integral heat of solution measurements of barium chloride to 619.81 K, copper oxide in an excess of perrhenic acid to 585 K, and cobalt perrhenate in perrhenic acid to 573 K were measured in a high dilution calorimeter (< or =10(-3) m) at psat, from which the high temperature thermodynamic properties of aqueous barium chloride, copper perrhenate, and cobalt perrhenate were obtained. From the kn...