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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Development of computerized high resolution mass spectrometer and gas-liquid chromatographic facility for study of lunar soil samples
Survey on organic geochemistry origins and use of gas-liquid chromatography and mass spectrometry analyses of organic components isolated from crude oils and sediments
Liquid sloshing cylindrical tank with elastic bottom for investigating surface tension effect at liquid gas interface of partly filled container
Aromatic carboxylic acids isolation from Colorado River Eocene formation shale, discussing gas- liquid chromatography and mass spectrometry
Zero gravity liquid-gas separator to prove principle of hydrophilic screen separation
Low temperature simulation of hypersonic melting ablation and wave patterns of gas-liquid interface
Turbulent viscoseals gas ingestion and fluid inertia analysis using stability of dynamic gas-liquid interface between rotating cylinders
Sugars identification as trifluoethylacetyl polyol derivatives by gas-liquid chromatography
Manufacture and performance of cryogenically formed stainless steel pressure vessels for liquid gas storage
Melting ablation for two dimensional and axisymmetric blunt bodies with body force, predicting gas-liquid interface temperature for free stream conditions
Lunar fines hydrochloric acid hydrolysates examination by gas-liquid chromatography indicating presence of organosiloxanes
Two phase detonation waves in liquid gas systems
Gas-liquid chromatographic milligram preparative separation of steranes and triterpanes from hydrocarbon fraction of Green River oil shale
Quantitative determination of phenylalanine in serum by gas-liquid chromatographic analysis method
Various methods used for the analysis of the base composition of RNA and DNA hydrolysates are presented. The methods discussed are: (1) ion-exchange chromatography, (2) paper chromatography, (3) paper electrophoresis, (4) thin layer chromatography, (5) paper chromatography and time of flight mass spectrometry, and (6) gas-liquid chromatography. The equipment required and the conditions for obtaining the best results with each method are described.
Analyses of biological substances and geochemical samples, of both terrestrial and extraterrestrial origin, are reported for amino acids at the 1-10 nanogram per gram level achieved by gas-liquid and ion-exchange chromatographic methods. These studies have shown that nanogram quantities of amino acids, present in water extracts of geochemical samples or in other samples of low amino acid concentration, can be successfully determined only if the researcher is well aware of the possible sources of contamination.
Work done to date is reported concerning Radio Frequency Mass Quantity Gauging. Experimental apparatus has been designed and tested which measures the resonant frequencies of a tank in the time domain. These frequencies correspond to the total mass of fluid within the tank. Experimental results are discussed for nitrogen and hydrogen in normal gravity both in the supercritical state and also in the two phase (liquid-gas) region. Theoretical discussions for more general cases are given.
Leak-testing methods for gas and liquid systems are described. The physical principles of molecular, liquid, and gas flow; relations of leak-testing methods and instrumentation; and tracer gases used in testing vacuum systems are discussed.