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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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Cyclic ketones containing methoxyl and hydroxyl studied for oxygen rearrangement on electron impact
Gamma-ray shield that can be evacuated, refilled with a clean gas, and pressurized for exclusion of airborne radioactive contaminants effectively lowers background noise. Under working conditions, repeated evacuation and filling procedures have not adversely affected the sensitivity and resolution of the crystal detector.
Mass spectra of 1,2-cyclohexane oxide and three deuterium labeled analogs
Gas-liquid and thin layer chromatography and nuclear magnetic resonance techniques to steric analysis of diketopiperazines
Mass spectral fragmentation of substituted aliphatic glycols and hydroxylated carbon-carbon bond
Normal, isoprenoid, dicarboxylic, keto and various aromatic acids isolated from controlled stepwise degradation of Green River kerogen by successive chromic acid oxidations
Gas chromatograph-mass spectrometer combination for in situ analysis of lunar organic matter, describing instrument design and operation
Dry column chromatography principles applied in microscale produce technique to minimize time in preparing and analyzing colorless constituents of soluble mixtures. Glass pipette microcolumns filled with finely sieved adsorbents permit capillary attraction and separation in 3 to 15 minutes. Technique is adaptable to gas chromatography.
Ion counting system is coupled to the last dynode of an Allen-type electron multiplier on the mass analyzer of a double focusing mass spectrometer. This leaves the anode available for an electrometer, making possible simultaneous measurements. Coupling is achieved by a ferrite core transformer and associated circuitry.
Time of flight spectrometer for ionospheric measurements
Time history plots and computer made movies on ion polar molecule collisions using mass spectroscopy
Infrared spectrometer data analysis system report with program listings
Mass spectra of 1,2-cyclohexanediol and deuterium labeled analogs data recorded and mechanistic rationalizations of degradation processes given
Electron impact induced fragmentation of androstane using deuterium labeling
Mass spectrometric sequence determination of oligopeptides via acetylacetonyl derivatives, giving reliable results with small peptides
Cyclohexene oxide mass spectral fragmentation by means of deuterium labeled analogs
Isomeric 1-phenylheptenes mass spectra, investigating electron impact induced rearrangements of double bond
Evidence against electron impact induced alkyl shifts in mass spectra of alpha-hydroxy-ketones, showing thermal rearrangements