Directional solidification of metal-gas eutectic (Gasar) is a novel process for making regular porous metals. This process is based on a solid-gas eutectic reaction involving a gaseous medium and a metal or a ceramic phase, and allows an easy control of the porosity, such as its pore size, pore orientation and morphology in a wide range by properly adjusting its melting and solidification condi...

Hyperbaric oxygen therapy (HBO), the administration of 100% oxygen under high pressure, can improve the situation. Such therapy greatly increases the amount of oxygen availabile to tissue. This is due to the gaseous/fluid (oxygen/plasma) interface that enhances oxygen absorption and transportation into the liquid phase of the blood. Under such circumstances, repair of tissue damaged by high dos...

Gas phase treatments of dry-fiberized newsprint were investigated as a way to impmve intefibre bonding and thereby to minimize the use of water for recycling newsprint. Chlorine dioxide, nitrogen dioxide, and ozone were studied as gaseous oxidizing agents. The report includes the results of an optimization study for the ozone treatment and results of experiments designed to establish the mechan...

The infrared (3500 to 40 cm-l) and Raman (3200 to 20 cm") spectra have been recorded for gaseous and solid cyclopropanecarboxaldehyde, c-C3H5CHO. Additionally, the Raman spectrum of the liquid has been recorded and qualitative depolarization values have been obtained. It has been determined that the conformer with the oxygen atom cis to the three-membered ring is the more stable form at ambient...

By using a simplified model of small open liquid-like clusters with surface effects, in the gas phase, it is shown how the statistical thermodynamics of small systems can be extended to include metastable supersaturated gaseous states not too far from the gas-liquid equilibrium transition point. To accomplish this, one has to distinguish between mathematical divergence and physical convergence ...

Experimental results of benzene and nitrogen adsorption from gaseous phase and benzene adsorption and kinetics of the process from aqueous solution, measured on a series of eight commercial closed carbon nanotubes, are presented. Additionally we show the results of adsorption on compressed nanotubes. Using simple analytical approach and the analysis of adsorption and kinetics results it is conc...

A novel method for the deprotection of oligodeoxyribonucleotides has been developed. Gaseous amines such as ammonia or methylamine were employed under pressure to achieve mild and rapid deprotection conditions. For example, oligodeoxyribonucleotides having a (tert-butyl)phenoxyacetyl group for the protection of the exocyclic amino function of cytosine, adenine and guanine were released from con...

We describe the design and performance of an electron-impact ion beam reflectron system coupled to our ‘‘single-photon infrared emission spectrometer’’ for measurement of infrared emission from excited gas-phase polycyclic aromatic hydrocarbon ~PAH! cations. This experiment provides for direct comparison of laboratory infrared emission spectra of gaseous ionized PAHs with the ‘‘unidentified inf...

We report the first detection of gas-phase CO2 emission in the star-forming region Cepheus A East, obtained by spectral line mapping of the ν2 bending mode at 14.98 μm with the Infrared Spectrograph (IRS) instrument onboard the Spitzer Space Telescope. The gaseous CO2 emission covers a region about 35 ′′ × 25 in extent, and results from radiative pumping by 15 μm continuum photons emanating pre...

The gas push-pull test (GPPT) is a single-well gas-tracer method to quantify in situ rates of CH4 oxidation in soils. To improve the design and interpretation of GPPT field experiments, gas component transport during GPPTs was examined in abiotic porous media over a range of water saturations (0.0 < or = Sw < or = 0.61). A series of GPPTs using He, Ne, and Ar as tracers for CH4 were performed a...