The purpose of this study was to evaluate the effects of the rate of argon gas flow on joint strength in the laser-welding of cast metal plates and to measure the porosity. Two cast plates (Ti and Co-Cr alloy) of the same metal were abutted and welded together. The rates of argon gas flow were 0, 5 and 10 L/min for the Co-Cr alloy, and 5 and 10 L/min for the Ti. There was a significant differen...

Two detection systems for gas-liquid chromatography were compared for the identification of metabolic end products (short-chain organic acids) from anaerobic bacteria. Argon and flame ionization detectors were connected in series with inert argon as the carrier gas for analysis of 35 stock strains and 148 clinical isolates. There was an excellent correlation between the argon and flame ionizati...

Molten salts are often used to store thermal energy in concentrating solar power plants. The need for higher temperature storage systems has prompted investigation into and structural alloys use at temperatures. A eutectic mixture of 68.05 wt% Na2SO4: 31.95 NaCl salt is a potential phase change material such systems, with low cost high latent heat fusion. This paper investigates corrosion Incon...

A series of o-quinoid compounds are generated by photolysis of phenylwbene and phenylnitrene precursors bearing appropriate functional groups at the ortho position in an argon matrix at 10 K and are analyzed by IR and UV/vis spectra. Attempts to convert these quinoid compounds to their valence isomers show that photointerconvertibility is possible only with the quinone methide system. Experimen...

Argon is a noble gas element that has demonstrated narcotic and protective abilities that may prove useful in the medical field. The earliest records of argon gas have exposed its ability to exhibit narcotic symptoms at hyperbaric pressures greater than 10 atmospheres with more recent evidence seeking to display argon as a potential neuroprotective agent. The high availability and low cost of a...

Context. We report the first discovery of argon in hot evolved stars and white dwarfs. We have identified the Ar  1063.55 Å line in some of the hottest known (Teff = 95 000−110 000 K) central stars of planetary nebulae and (pre-) white dwarfs of various spectral type. Aims. We determine the argon abundance and compare it to theoretical predictions from stellar evolution theory as well as fro...

BACKGROUND Argon treatment following experimental neurotrauma has been found neuroprotective in an array of in vivo and in vitro models. The inherent cellular and molecular mechanisms are still unknown. We seeked to shed light on these processes by examinig the cellular distribution and the expression of inflammatory markers and growth factors in argon treated brain tissue. METHODS Male adult...

Cooling to 33.5°C in babies with neonatal encephalopathy significantly reduces death and disability, however additional therapies are needed to maximize brain protection. Following hypoxia-ischemia we assessed whether inhaled 45-50% Argon from 2-26h augmented hypothermia neuroprotection in a neonatal piglet model, using MRS and aEEG, which predict outcome in babies with neonatal encephalopathy,...

Success of the puff-and-pump radiating divertor approach depends sensitively on both the divertor magnetic geometry and the ion B B drift direction. In the puff-and-pump scenario used in this study, argon impurities were injected into the private flux region, while plasma flows into both the inner and outer divertors were enhanced by a combination of particle pumping near both divertor targets ...