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  • 1
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    Characterization of Pt/SnO2 catalysts for CO oxidation (1987)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: Results are presented of surface characterization of 2% and 1% (w/w) Pt on SnO2 catalysts which are being used in promoting the oxidation of CO in pulsed CO2 lasers. The N2 adsorption BET surface area for both catalysts is 6.9 sq m/g. The CO chemisorbed area at 313K is 0.17 sq m/g and 0.062 sq m/g for the 2% and 1% catalysts, respectively. Monitoring the reaction between CO and O2 by the same technique, at the same temperature yields a turn-over frequency (TOF) for the 2% catalyst of 2.7 x 100 molecules of CO2/site/s and for the 1% catalyst a value of 1.2 x 100. The ratio of the TOFs for the two catalysts is 2.2 which is approximately the ratio of the Pt loading.
    Keywords: LASERS AND MASERS
    Type: Closed-Cycle, Frequency-Stable CO2 Laser Technology; p 219-225
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Visible and infrared polarization ratio spectroreflectometer (1980)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The instrument assists in determining the refractive index and absorption index, at different spectral frequencies, of a solid sample by illuminating the sample at various angles in incidence and measuring the corresponding reflected intensities at various spectral frequencies and polarization angles. The ratio of the intensity of the reflected light for parallel polarized light to that for perpendicular polarized light at two different angles of incidence can be used to determine the optical constants of the sample. The invention involves an apparatus for facilitating the utilization of a wide variety of angles of incidence. The light source and polarizing element are positioned on an outer platform; the sample is positioned on an inner platform. The two platforms rotate about a common axis and cooperate in their rotation such that the sample is rotated one degree for every two degrees of rotation of the light source. This maintains the impingement of the reflected light upon the detector for any angle of incidence without moving or adjusting the detector which allows a continuous change in the angle of incidence.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Preliminary data for the 20 May 1974, simultaneous evaluation of remote sensors experiment (1975)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Several remote sensors were simultaneously used to collect data over the tidal James River from Hopewell to Norfolk, Virginia. Sensors evaluated included the Multichannel-Ocean Color Sensor, multispectral scanners, and multispectral photography. Ground truth measurements and remotely sensed data are given. Preliminary analysis indicates that suspended sediment and concentrated industrial effluent are observable from all sensors.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA-TM-X-72676
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Processing of combined domestic bath and laundry waste waters for reuse as commode flushing water (1975)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: An experimental investigation of processes and system configurations for reclaiming combined bath and laundry waste waters for reuse as commode flush water was conducted. A 90-min recycle flow was effective in removing particulates and in improving other physical characteristics to the extent that the filtered water was subjectively acceptable for reuse. The addition of a charcoal filter resulted in noticeable improvements in color, turbidity, and suds elimination. Heating and chlorination of the waste waters were investigated for reducing total organism counts and eliminating coliform organisms. A temperature of 335.9 K (145 F) for 30 min and chlorine concentrations of 20 mg/l in the collection tank followed by 10 mg/l in the storage tank were determined to be adequate for this purpose. Water volume relationships and energy-use rates for the waste water reuse systems are also discussed.
    Keywords: CHEMISTRY AND MATERIALS (GENERAL)
    Type: NASA-TN-D-7937 , L-10034
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Instrument measures many optical properties in visible and IR (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Electro-optical system measures reflectance, reflectance ratio, transmission, absorption, refractive index, and absorption coefficient in both visible and infrared (IR) spectral regions. System effectively combining capabilities of ellisometer, reflectometer, and spectrophotometer is expected to find application in environmental and material composition testing fields.
    Keywords: PHYSICAL SCIENCES
    Type: LAR-12285 , NASA Tech Briefs (ISSN 0145-319X); 3; 4; P. 518
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    Domestic wash water reclamation for reuse as commode water supply using filtration: Reverse-osmosis separation technique (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A combined filtration-reverse-osmosis water recovery system has been evaluated to determine its capability to reclaim domestic wash water for reuse as a commode water supply. The system produced water that met all chemical and physical requirements established by the U.S. Public Health Service for drinking water with the exception of carbon chloroform extractables, methylene blue active substances, and phenols. It is thought that this water is of sufficient quality to be reused as commode supply water. The feasibility of using a combined filtration and reverse-osmosis technique for reclaiming domestic wash water has been established. The use of such a technique for wash-water recovery will require a maintenance filter to remove solid materials including those less than 1 micron in size from the wash water. The reverse-osmosis module, if sufficiently protected from plugging, is an attractive low-energy technique for removing contaminants from domestic wash water.
    Keywords: GENERAL
    Type: NASA-TN-D-7600 , L-9431
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 7
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    The chemical/physical and microbiological characteristics of typical bath and laundry waste waters (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Chemical/physical and microbiological characteristics are studied of typical bath and laundry waters collected during a 12 day test in which the untreated waste waters were reused for toilet flush. Most significant changes were found for ammonia, color, methylene blue active substances, phosphates, sodium, sulfates, total organic carbon, total solids, and turbidity in comparison with tap water baseline. The mean total number of microorganisms detected in the waste waters ranged from 1 million to 10 to the 7th power cells/m1 and the mean number of possible coliforms ranged from 10 to the 5th power to 1 million. An accumulation of particulates and an objectible odor were detected in the tankage used during the 12 day reuse of the untreated waste waters. The combined bath and laundry waste waters from a family of four provided 91 percent of the toilet flush water for the same family.
    Keywords: BIOTECHNOLOGY
    Type: NASA-TN-D-7566 , L-9365
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 8
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    Domestic wash water reclamation (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: System consists of filtration unit, reverse-osmosis module, tanks, pumps, plumbing, and various gauges, meters, and valves. After water is used in washing machine or shower, it is collected in holding tank. Water is pumped through series of five particulate filters. Pressure tank supplies processed water to commode water closet.
    Keywords: MATERIALS
    Type: LAR-11606
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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