نتایج جستجو برای: argon isotherm

تعداد نتایج: 14880  

Journal: :Dental materials journal 2012
Yasuko Takayama Rie Nomoto Hiroyuki Nakajima Chikahiro Ohkubo

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...

Journal: :Journal of clinical microbiology 1978
N M Sullivan J Mayhew D DiTullio F P Tally

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...

2012
Marko Popovic

There are three possible effects of Special Theory of Relativity (STR) on a thermodynamic system. Planck and Einstein looked upon this process as isobaric; on the other hand Ott saw it as an adiabatic process. However plenty of logical reasons show that the process is isotherm. Our phenomenological consideration demonstrates that the temperature is invariant with Lorenz transformation. In that ...

2014
Busetty Subramanyam Ashutosh Das

In adsorption study, to describe sorption process and evaluation of best-fitting isotherm model is a key analysis to investigate the theoretical hypothesis. Hence, numerous statistically analysis have been extensively used to estimate validity of the experimental equilibrium adsorption values with the predicted equilibrium values. Several statistical error analysis were carried out. In the pres...

2014
Derek S Nowrangi Jiping Tang John H Zhang

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...

Journal: :Communications, Faculty Of Science, University of Ankara Series B Chemistry and Chemical Engineering 1994

2007
K. Werner J. W. Kruk

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...

2014
Astrid V Fahlenkamp Mark Coburn Antonio de Prada Nadine Gereitzig Cordian Beyer Hajo Haase Rolf Rossaint Jens Gempt Yu-Mi Ryang

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...

2003
Paul A. Webb

The chemical adsorption isotherm reveals information about the active surface of a material and has been employed for many years as a standard analytical tool for the evaluation of catalysts. Temperature-programmed reaction techniques have emerged from the 1950’s as an indispensable companion to chemisorption isotherm analyses in many areas of industry and research. This paper provides an intro...

2016
Kevin D. Broad Igor Fierens Bobbi Fleiss Eridan Rocha-Ferreira Mojgan Ezzati Jane Hassell Daniel Alonso-Alconada Alan Bainbridge Go Kawano Daqing Ma Ilias Tachtsidis Pierre Gressens Xavier Golay Robert D. Sanders Nicola J. Robertson

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,...

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