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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Medical & biological engineering & computing 18 (1980), S. 741-745 
    ISSN: 1741-0444
    Keywords: Blood monitoring ; Catheter-tip pH sensor ; I.S.F.E.T. ; Miniature pH sensor ; Miniature pCO2 sensor
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Abstract A catheter-tip pH sensor was developed for possible clinical and biomedical application, using an ion-sensitive field-effect transistor (i.s.f.e.t.). Its signal drift in buffer solutions during continuous measurement was less than 3 mV in 24 h (equivalent to about 0·05 pH in 24 h). The electric insulation was perfect when soaked in buffer solutions for more than 3 months. A continuousin vivo pH measurement was successfully achieved in nonheparinised arterial blood of a japanese monkey. There was no significant sign of clot formation for 8 hours. It revealed quick responses to respiratory acidosis and alkalosis, and the observed pH values were in accordance with those confirmed by a blood pH analyser. Also, a catheter-tip pCO2 sensor was prepared, using the catheter-tip pH i.s.f.e.t. The response time was 2 min for a 90% change in CO2 tension. The muscle pCO2 monitoring tested with it indicated a similar result to those with medical mass spectrometer.
    Type of Medium: Electronic Resource
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  • 2
    Publication Date: 1983-12-01
    Print ISSN: 0009-2614
    Electronic ISSN: 1873-4448
    Topics: Chemistry and Pharmacology , Physics
    Published by Elsevier
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  • 3
    Publication Date: 1984-12-01
    Print ISSN: 0009-2614
    Electronic ISSN: 1873-4448
    Topics: Chemistry and Pharmacology , Physics
    Published by Elsevier
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  • 4
    Publication Date: 2011-08-18
    Keywords: NONMETALLIC MATERIALS
    Type: International Journal of Solar Energy (ISSN 0142-5919); 2; 171-187
    Format: text
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  • 5
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    In:  Other Sources
    Publication Date: 2011-08-18
    Description: The current module and installation costs for the U.S. National Photovoltaic Program's grid-connected systems are significantly higher than required for economic viability of this alternative. Attention is accordingly given to the prospects for installed module cost reductions in flat plate, linear focus Fresnel concentrator, and point focus Fresnel concentrator candidate systems. Cost projections indicate that all three systems would meet near-term and midterm goals, provided that module costs of $2.80/W(p) and $0.70/W(p), respectively, are met. The point focus Fresnel system emerges as the most viable for the near term.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: Japanese Journal of Applied Physics (ISSN 0021-4922); 21; 143-153
    Format: text
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  • 6
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    In:  Other Sources
    Publication Date: 2019-06-28
    Description: Radiation coupling of heat from heat-source cylinder to converter cylinder through vacuum gap eliminates need for high-temperature electrical insulators between reactor heat pipes and thermionic converters. In addition no radiatior heat pipe is necessary because collectors of thermionic converters from which excess heat must be removed radiate directly to space. New design concept is also applicable to terrestrial and non-nuclear thermionic power supplies.
    Keywords: FABRICATION TECHNOLOGY
    Type: NPO-15278 , NASA Tech Briefs (ISSN 0145-319X); 7; 1; P. 107
    Format: text
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  • 7
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    In:  Other Sources
    Publication Date: 2019-06-28
    Description: It is shown that thermionic converters at moderate emitter temperatures of about 1600 K can be designed for a radiatively coupled 100 kWe device. A nuclear reactor is a primary heat source, with heat pipes extracting heat from the reactor and distributing it over a large surface opposite an array of thermionic energy converters. The radiative heat transfer across the vacuum gap heats up the thermionic emitters, and excess heat from the converters is radiated from the collector electrodes to the vacuum of space; the heat transfer is controlled by the energy density to be transferred, and by the temperature differential between the heat source and the heat receiver. It is concluded that this system achieves isolation of power converter modules from the heat source, elimination of additional radiators, and reduction of converter dimensions.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: Journal of Energy; 5; Jan
    Format: text
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  • 8
    Publication Date: 2019-06-28
    Description: The U.S. Department of Energy/Solar Energy Research Institute Amorphous Silicon (a-Si) Solar Cell Program performs R&D on thin-film hydrogenated amorphous silicon for eventual development of stable amorphous silicon cells with 12 percent efficiency by 1988. The Amorphous Silicon Solar Cell Program in Japan is sponsored by the Sunshine Project to develop an alternate energy technology. While the objectives of both programs are to eventually develop a-Si photovoltaic modules and arrays that would produce electricity to compete with utility electricity cost, the U.S. program approach is research oriented and the Japanese is development oriented.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: ASME PAPER 84-WA/SOL-11
    Format: text
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  • 9
    Publication Date: 2019-06-28
    Description: The development of high-efficiency low-cost crystalline silicon ribbon and thih-film solar cells for the energy national photovoltaics program was examined. The findings of an issue study conducted are presented. The collected data identified the status of the technology, future research needs, and problems experienced. The potentials of present research activities to meet the Federal/industry long-term technical goal of achieving 15 cents per kilowatt-hour levelized PV energy cost are assessed. Recommendations for future research needs related to crystalline silicon ribbon and thin-film technologies for flat-plate collectors are also included.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-175654 , JPL-PUBL-84-95 , NAS 1.26:175654 , DOE/ET-20356/21
    Format: application/pdf
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  • 10
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    In:  CASI
    Publication Date: 2019-06-28
    Description: The status of the Japanese photovoltaic (PV) R&D activities was surveyed through literature searches, private communications, and site visits in 1982. The results show that the Japanese photovoltaic technology is maturing rapidly, consistent with the steady government funding under the Sunshine Project. Two main thrusts of the Project are: (1) completion of the solar panel production pilot plants using cast ingot and sheet silicon materials, and (2) development of large area amorphous silicon solar cells with acceptable efficiency (10 to 12%). An experimental automated solar panel production plant rated at 500 kW/yr is currently under construction for the Sunshine Project for completion in March 1983. Efficiencies demonstrated by experimental large are amorphous silicon solar cells are approaching 8%. Small area amorphous silicon solar cells are, however, currently being mass produced and marketed by several companies at an equivalent annual rate of 2 MW/yr for consumer electronic applications. There is no evidence of an immediate move by the Japanese PV industry to enter extensively into the photovoltaic power market, domestic or otherwise. However, the photovoltaic technology itself could become ready for such an entry in the very near future, especially by making use of advanced process automation technologies.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-170292 , NAS 1.26:170292 , DOE/JPL-1012-80 , REPT-5230-9 , JPL-PUB-83-8
    Format: application/pdf
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