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  • Inorganic Chemistry  (11.889)
  • Industrial Chemistry  (3.169)
  • BIOSCIENCES  (1.701)
  • CHEMISTRY
  • Seismology
  • 1970-1974  (8.730)
  • 1950-1954  (2.983)
  • 1935-1939  (3.392)
  • 1920-1924
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  • 1
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    Near-field observations and source parameters of Central California earthquakes (1974)
    In:  Bull. Seism. Soc. Am., San Francisco, Schweizerbart'sche Verlagsbuchhandlung, vol. 65, no. B10, pp. 1855-1886, pp. B10404, (ISSN 0016-8548, ISBN 3-510-50045-8)
    Details
    Publikationsdatum: 1974
    Schlagwort(e): Nearfield ; Source parameters ; Seismology ; Nuclear explosion ; BSSA
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    BIBLIOGRAFIE SEISMOLOGIE
  • 2
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    Reflections, rays and reverberations (1974)
    In:  Bull. seism. Soc. Am., New York, Allerton Press, vol. 64, no. 1, pp. 1685-1696, pp. L01606, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 1974
    Schlagwort(e): Reflectivity ; Ray seismics ; Multiples ; Seismology ; Seismics (controlled source seismology) ; BSSA
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    BIBLIOGRAFIE SEISMOLOGIE
  • 3
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    Seismic observations in Germany of a 10 t explosion off Scotland (1974)
    In:  J. Geophys., Luxembourg, Conseil de l'Europe, vol. 40, no. 6, pp. 259-264, pp. L15S17, (ISBN: 0-12-018847-3)
    Details
    Publikationsdatum: 1974
    Schlagwort(e): Seismology ; Deep seismic sounding (espec. cont. crust) ; Project report/description
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    BIBLIOGRAFIE SEISMOLOGIE
  • 4
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    Body waves as normal and leaking modes (1974)
    In:  Bull. seism. Soc. Am., Jena, Scientific American, vol. 64, no. B9, pp. 301-307, pp. B09309, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 1974
    Schlagwort(e): Body waves ; Seismology ; NOModelling ; Synthetic seismograms ; Leaking modes ; Layers ; BSSA ; Bremaecker
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    BIBLIOGRAFIE SEISMOLOGIE
  • 5
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    Systematische Untersuchungen der kurzperiodischen seismischen Bodenunruhe in der Bundesrepublik Deutschland (1974)
    In:  Geologisches Jahrbuch Reihe E Geophysik - geophysics, Würzburg, Pergamon, vol. 37, no. E3, pp. 1-59, pp. B05S01, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 1974
    Schlagwort(e): Seismology ; NOISE ; background ; Germany
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    BIBLIOGRAFIE SEISMOLOGIE
  • 6
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    Spectral Analysis in Geophysics (1974)
    Elsevier
    In:  Amsterdam, Elsevier, vol. 8, pp. 415, (ISBN 0-471-95596-5)
    Details
    Publikationsdatum: 1974
    Schlagwort(e): Textbook of geophysics ; Data analysis / ~ processing ; Spectral analysis ; Spectrum ; Seismology ; Seismics (controlled source seismology) ; Bath
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    BIBLIOGRAFIE SEISMOLOGIE
  • 7
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    Seismic source function for an underground nuclear explosion (1974)
    In:  Bull. Seism. Soc. Am., Tokyo, Inst. f. Theoret. Geodäsie, vol. 64, no. 3, pp. 131-148
    Details
    Publikationsdatum: 1974
    Schlagwort(e): Nuclear explosion ; Source ; Seismology ; BSSA
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    BIBLIOGRAFIE SEISMOLOGIE
  • 8
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    Recorded strong motion on the Hsinfengkiang-dam, China (1974)
    In:  Bull. Seism. Soc. Am., Warszawa, Elsevier, vol. 64, no. 1, pp. 1337-1342, pp. 2091, (ISBN: 0-12-018847-3)
    Details
    Publikationsdatum: 1974
    Schlagwort(e): Induced seismicity ; Earthquake precursor: chemical (Rn, water(-level,...) ; Earthquake precursor: stresses ; Seismology ; Waves ; BSSA
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    BIBLIOGRAFIE SEISMOLOGIE
  • 9
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    An automatic event detector at the Tonto Forest seismic observatory (1974)
    In:  Geophys., Warszawa, Elsevier, vol. 39, no. 2, pp. 63-643, pp. 2382, (ISBN: 0-12-018847-3)
    Details
    Publikationsdatum: 1974
    Schlagwort(e): Seismology ; Detectors ; sta
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    BIBLIOGRAFIE SEISMOLOGIE
  • 10
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    Automatic analysis of tape-recordings from seismic networks (1974)
    In:  Geophys. J. R. astr. Soc., Roma, Acad. Roy. des Sciences, vol. 39, no. 1, pp. 155-168, pp. B04102, (ISBN: 0-12-018847-3)
    Details
    Publikationsdatum: 1974
    Schlagwort(e): Seismology ; Seismic networks ; GJRaS
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    BIBLIOGRAFIE SEISMOLOGIE
  • 11
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    Relations between different kinds of magnitude determination and their regional variations (1974)
    Central Earth Physics Institute, Academy of Sciences of the G.D.R.
    In:  Proc. XIV General Assembly of the European Seismological Commission, Trieste, September 16-22, 1974, Rome, Central Earth Physics Institute, Academy of Sciences of the G.D.R., vol. 10, no. 464, pp. 27-39
    Details
    Publikationsdatum: 1974
    Schlagwort(e): Magnitude ; Data analysis / ~ processing ; Seismology ; noksp
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    BIBLIOGRAFIE SEISMOLOGIE
  • 12
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    Getriggerte Bruchvorgänge als Modell für die Entstehung von Tieferdbeben (1974)
    Institut f. Meteorol. und Geophys., Univ. Frankfurt am Main
    In:  Dissertation, San Antonio, Institut f. Meteorol. und Geophys., Univ. Frankfurt am Main, vol. 11, no. CUED/C/Mats/Tr 51, pp. 426-439
    Details
    Publikationsdatum: 1974
    Schlagwort(e): Source mechanics ; SModelling ; Source ; Laboratory measurements ; Seismology
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    BIBLIOGRAFIE SEISMOLOGIE
  • 13
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    A precise, continuous measurement of seismic velocity (1974)
    In:  J. Geophys. Res., Tübingen, Europ. Ass. Exploration Geophys., vol. 79, no. 2, pp. 399-406, pp. 2017, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 1974
    Schlagwort(e): Velocity ; Seismology ; Earthquake precursor: prediction research ; Earthquake precursor: Vp/Vs anomalies ; JGR ; Body waves
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    BIBLIOGRAFIE SEISMOLOGIE
  • 14
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    Automatic phase identification with one and two large aperture seismic arrays (1974)
    In:  Bull. Seism. Soc. Am., Washington, D.C., AGU, vol. 64, no. 5, pp. 221-233, pp. 1489, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 1974
    Schlagwort(e): Seismology ; Detectors ; AUD ; Seismic arrays ; Toksoez ; Toksoz ; BSSA
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    BIBLIOGRAFIE SEISMOLOGIE
  • 15
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    Global Tectonics and Earthquake Risk (1974)
    Elsevier
    In:  Amsterdam, London, New York, xiv+320 pp., Elsevier, vol. 5, no. 22, pp. 662-664, (ISBN 1-4020-1244-6)
    Details
    Publikationsdatum: 1974
    Schlagwort(e): Earthquake risk ; Earthquake hazard ; Earthquake engineering, engineering seismology ; Seismicity ; Plate tectonics ; Tectonics ; Seismology
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    BIBLIOGRAFIE SEISMOLOGIE
  • 16
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    Magnitude recurrence relation for central Mississippi Valley earthquakes (1974)
    In:  Bull. Seism. Soc. Am., Dordrecht, Martinus Nijhoff Publishers, vol. 64, no. 3, pp. 1189-1207, pp. L11307, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 1974
    Schlagwort(e): Seismicity ; Recurrence of earthquakes ; Seismology ; BSSA
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    BIBLIOGRAFIE SEISMOLOGIE
  • 17
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    Brunnen als seismische Übertragungssysteme (1974)
    Fachbereich Geowissenschaften der Johann Wolfgang von Goethe-Universität Frankfurt am Main
    In:  Dissertation, Yaroslavl, U.S.S.R., Fachbereich Geowissenschaften der Johann Wolfgang von Goethe-Universität Frankfurt am Main, vol. C 560, 183 pp., no. PL-TR-91-2130, pp. 5-7, (ISBN 3-933346-037)
    Details
    Publikationsdatum: 1974
    Schlagwort(e): Seismology ; Fluids ; Instruments
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    BIBLIOGRAFIE SEISMOLOGIE
  • 18
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    Space and man (1974)
    In:  CASI
    Details
    Publikationsdatum: 2006-01-11
    Beschreibung: The effects of man's entry into space on changes in economics and technology, politics and law, science, philosophy, and art are considered. A single world economy, extracting from the natural resources of the moon and other cosmic bodies raw materials and energy, will avoid terrestrial limitations and improve society by eliminating the inequalities of economic and social status. However, a spacecraft for interplanetary travel require thermonuclear engines that achieve an escape velocity of 0.1 times the speed of light in order to allow an astronaut stellar expedition corresponding to the active life of a single generation.
    Schlagwort(e): BIOSCIENCES
    Materialart: Inhabited Space, Pt. 2 (NASA-TT-F-820); p 128-134
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  • 19
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    Detection of life in space (1974)
    In:  CASI
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    Publikationsdatum: 2006-01-11
    Beschreibung: The selection of spacecraft experiments and equipment to detect extraterrestrial life outside earth centers on observations of chemical compounds similar to amino acids and proteins, on signs of metabolism in the form of nutrient absorption, and life form impressions in fossiles or signs of civilization.
    Schlagwort(e): BIOSCIENCES
    Materialart: Inhabited Space, Pt. 2 (NASA-TT-F-820; p 42-52
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  • 20
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    Space psychology (1974)
    In:  CASI
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    Publikationsdatum: 2006-01-11
    Beschreibung: Psychological selection of astronauts considers mental responses and adaptation to the following space flight stress factors: (1) confinement in a small space; (2) changes in three dimensional orientation; (3) effects of altered gravity and weightlessness; (4) decrease in afferent nerve pulses; (5) a sensation of novelty and danger; and (6) a sense of separation from earth.
    Schlagwort(e): BIOSCIENCES
    Materialart: Inhabited Space, Pt. 2 (NASA-TT-F-820); p 29-41
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  • 21
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    Life in space (1974)
    In:  CASI
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    Publikationsdatum: 2006-01-11
    Beschreibung: Biotechnological aspects of manned space flight are reviewed and the basic biological problems of training and sustaining man in interplanetary flights are elaborated.
    Schlagwort(e): BIOSCIENCES
    Materialart: Inhabited Space, Pt. 2 (NASA-TT-F-820); p 17-28
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  • 22
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    Alterations in left ventricular volumes induced by Valsalva manoeuvre (1974)
    In:  Other Sources
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    Publikationsdatum: 2011-08-16
    Beschreibung: Five patients were studied with left ventriculography during different phases of the Valsalva manoeuvre. Small doses of contrast medium allowed adequate repetitive visualization of the left ventricle for volume calculation. During strain phase, the volume of the left ventricle decreased by nearly 50 per cent in each case, and stroke volume and cardiac output also dropped strikingly. Release of straining was attended by a sharp rebound of left ventricular volume to control levels, with a transient surge of increased cardiac output 42 per cent above that of the resting state.
    Schlagwort(e): BIOSCIENCES
    Materialart: British Heart Journal; 36; July 197
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  • 23
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    Apollo space crew cardiovascular evaluations (1974)
    In:  Other Sources
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    Publikationsdatum: 2011-08-16
    Beschreibung: Cardiovascular responses associated with pre- and postflight orthostatic tolerance evaluations of Apollo crewmen are presented with a brief historical survey and a discussion of their implications for future manned space flight. Heart rates were increased while systolic and pulse pressures were decreased during the immediate postflight orthostatic evaluation. A postflight elevation in resting heart rate was a less frequent finding.
    Schlagwort(e): BIOSCIENCES
    Materialart: Aerospace Medicine; 45; Aug. 197
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  • 24
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    Recovery of medically important microorganisms from Apollo astronauts (1974)
    In:  Other Sources
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    Publikationsdatum: 2011-08-16
    Beschreibung: Microbiological samples were obtained from the crewmembers of the Apollo 13, 14, 15, 16, and 17 spaceflights. These specimens were analyzed for the presence of medically important microorganisms with Staphylococcus aureus, Pseudomonas aeruginosa, Tricophyton mentagrophytes, Tricophyton rubrum, and Candida albicans being discussed in detail. Preflight isolation of crewmembers was found to coincide with a complete absence of inflight disease events and is recommended for future spaceflights. No autoinfection response (microbial shock) occurred after any of the reported spaceflights.
    Schlagwort(e): BIOSCIENCES
    Materialart: Aerospace Medicine; 45; Aug. 197
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  • 25
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    Quantum chemical study of the thermodynamics, kinetics of formation and bonding of H2CN - Relevance to prebiotic chemistry (1974)
    In:  Other Sources
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    Publikationsdatum: 2011-08-16
    Schlagwort(e): CHEMISTRY
    Materialart: Journal of Molecular Evolution; 3; 3, 19; 1974
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  • 26
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    Alteration of pituitary-adrenal dynamics induced by a water deprivation regimen (1974)
    In:  Other Sources
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    Publikationsdatum: 2011-08-16
    Beschreibung: Experiments are described which were designed to assess the degree of adaptation that occurs in rats chronically exposed to the stress of a water-deprivation regimen and to determine if that adaptation represents a normalization of the hypothalamic-pituitary-adrenal axis. There were no significant differences in mean corticosterone concentrations among control nondeprived rats 1, 4, and 8 weeks after the start of the experiment. The water-deprived rats, however, had significantly elevated plasma steroids 1 and 4 weeks after the onset of deprivation as compared to controls, but not after 8 weeks. Thus, there was a significant decrease in mean plasma corticosterone levels during water deprivation from 1 week to 8 weeks.
    Schlagwort(e): BIOSCIENCES
    Materialart: Physiology and Behavior; 12; 1974
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  • 27
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    GC-MS in the analysis of organic compounds in meteorites (1974)
    In:  Other Sources
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    Publikationsdatum: 2011-08-16
    Beschreibung: The application of an analytical approach combining gas chromatography with mass spectrometry (GC-MS) has shown that the amino acid composition of meteorite extracts is quite complex. A computer was used in the evaluation of the data obtained in the investigations. The computer programs developed have been concerned solely with the mass spectra of amino acids. Specialized programs have been written to determine the number of carbon atoms in an amino acid which is a member of any of three subclasses.
    Schlagwort(e): CHEMISTRY
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  • 28
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    A flash photolysis-resonance fluorescence kinetics study of the reaction S/3P/ + OCS (1974)
    In:  Other Sources
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    Publikationsdatum: 2011-08-16
    Beschreibung: Using the technique of flash photolysis-resonance fluorescence, the reaction of ground-state atomic sulfur with carbonyl sulfide has been investigated over the temperature range from 233 to 445 K. Over this temperature range, the experimental data were fitted to an Arrhenius equation of the form k sub 1 = (1.52 plus or minus 0.20) x 10 to the minus 12th power exp(-3.63 plus or minus 0.12 kcal/mol/RT) cu cm/molecule/sec. A comparison of these results with previous investigations on this reaction system is presented.
    Schlagwort(e): CHEMISTRY
    Materialart: Journal of Physical Chemistry; 78; June 6
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  • 29
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    Enhanced oxidative vaporization of Cr2O3 and chromium by oxygen atoms (1974)
    In:  Other Sources
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    Publikationsdatum: 2011-08-16
    Beschreibung: Rates of oxidative vaporization of Cr2O3 have been found to be markedly enhanced in the presence of oxygen atoms. Investigations were conducted over the temperature range 200-1250 C. For Cr2O3 the enhancement was about 10 to the 9th power at 550 C in oxygen containing 2.5% atoms. Rapid oxidative vaporization of bare chromium was observed below 800 C, the rate being about one-half that of Cr2O3. Results are interpreted in terms of thermochemical analysis.
    Schlagwort(e): CHEMISTRY
    Materialart: Electrochemical Society; vol. 121
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  • 30
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    Sticking probabilities for the adsorption of hydrogen on clean Ni/111/, Ni/100/, Ni sheet and evaporated Ni films (1974)
    In:  Other Sources
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    Publikationsdatum: 2011-08-16
    Beschreibung: Determination of the sticking probability for hydrogen adsorption on clean Ni(111), Ni(100), polycrystalline nickel sheet, and polycrystalline evaporated nickel films, using a modification of the reflection detector technique of Horgan and King (1970) for metal films. The initial sticking probability for hydrogen adsorption on a nickel film at 300 K by the proposed method is found to be 0.25 in comparison to 0.35 for hydrogen adsorption on a nickel film using the reflection detector technique. Also, the sticking probabilities on smooth single-crystal (111) and (100) planes and polycrystalline sheets are found to be lower than those on the rougher polycrystalline nickel films.
    Schlagwort(e): CHEMISTRY
    Materialart: Surface Science; 41; 2, Fe; Feb. 197
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  • 31
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    Effects of simulated weightlessness on responses of untrained men to +Gz acceleration (1974)
    In:  Other Sources
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    Publikationsdatum: 2011-08-16
    Beschreibung: This study documents bedrest-induced metabolic and physiologic changes in six untrained men exposed, following a two-week period of simulated weightlessness, to possible +Gz acceleration profiles anticipated for Space Shuttle vehicle travel. All subjects demonstrated decreased +Gz tolerance following simulated weightlessness. While only one of six subjects could not tolerate the +Gz profile in the control phase of the study, three of the six could not complete the postbed-rest study. The use of an inflated standard Air Force cutaway G-suit improved +Gz tolerance in all subjects, but two of six subjects still failed to complete the profile. These findings are discussed in reference to the selection of untrained humans for Space Shuttle vehicle travel.
    Schlagwort(e): BIOSCIENCES
    Materialart: Journal of Applied Physiology; 36; June 197
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  • 32
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    Photo-induced free radicals on a simulated Martian surface (1974)
    In:  Other Sources
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    Publikationsdatum: 2011-08-16
    Beschreibung: Results of an electron spin resonance study of free radicals in the ultraviolet irradiation of a simulated Martian surface suggest that the ultraviolet photolysis of CO or CO2, or a mixture of both, adsorbed on silica gel at minus 170 C involves the formation of OH radicals and possibly of H atoms as the primary process, followed by the formation of CO2H radicals. It is concluded that the photochemical synthesis of organic compounds could occur on Mars if the siliceous surface dust contains enough silanol groups and/or adsorbed H2O in the form of bound water.
    Schlagwort(e): CHEMISTRY
    Materialart: Nature; 248; Apr. 12
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  • 33
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    Major and trace elements in the Allende meteorite (1974)
    In:  Other Sources
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    Publikationsdatum: 2011-08-16
    Beschreibung: The Allende samples analyzed include seven Ca, Al-rich aggregates, ten melilite chondrules, an olivine chondrule, and two olivine-rich aggregates. The Allende meteorite has been described as a type III carbonaceous chondrite. Major element abundances were determined with the electron microprobe technique reported by Reed and Ware (1972). An MS7 spark source mass spectrometer was used for the determination of trace element abundances.
    Schlagwort(e): CHEMISTRY
    Materialart: Nature; 249; May 24
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  • 34
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    Evidence for two immunologically distinct acetyl-coenzyme A synthetases in yeast (1974)
    In:  Other Sources
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    Publikationsdatum: 2011-08-16
    Beschreibung: Evidence is presented that clearly establishes the presence of two acetyl-CoA synthetases in Saccharomyces cerevisiae, one elaborated under 'aerobic' conditions, the other under 'nonaerobic' conditions. The antibody produced by each enzyme is immunologically specific.
    Schlagwort(e): CHEMISTRY
    Materialart: Biochimica et Biophysica Acta; 341; 1974
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  • 35
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    Thermochemical water decomposition processes (1974)
    In:  Other Sources
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    Publikationsdatum: 2011-08-16
    Beschreibung: Thermochemical processes which lead to the production of hydrogen and oxygen from water without the consumption of any other material have a number of advantages when compared to other processes such as water electrolysis. It is possible to operate a sequence of chemical steps with net work requirements equal to zero at temperatures well below the temperature required for water dissociation in a single step. Various types of procedures are discussed, giving attention to halide processes, reverse Deacon processes, iron oxide and carbon oxide processes, and metal and alkali metal processes. Economical questions are also considered.
    Schlagwort(e): CHEMISTRY
    Materialart: I & EC - Industrial and Engineering Chemistry; vol. 13
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  • 36
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    The determination of soil moisture by extraction and gas chromatography (1974)
    In:  Other Sources
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    Publikationsdatum: 2011-08-16
    Beschreibung: Soil moisture content was determined by extracting soil with methanol and subsequently analyzing the extract for water by gas chromatography. With air-dried mineral soils, this method gave slightly higher moisture content values than those obtained by the oven-dry method. Moisture content was determined quantitatively in soils to which various amounts of water had been added. The complete procedure, including extraction and analysis, requires less than one hour and gives results that closely compare to the oven-dry method.
    Schlagwort(e): CHEMISTRY
    Materialart: Soil Science; 117; 2, 19; 1974
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  • 37
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    The chemical composition of cosmic ray nuclei above 1.3 GeV per nucleus and 23 GeV per nucleus (1974)
    In:  Other Sources
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    Publikationsdatum: 2011-08-16
    Beschreibung: Measurements made with a balloon-borne counter telescope are reported. The telescope was flown from Palestine, Tex., during the fall of 1971 for a total of 10 hours under an average residual atmospheric depth of 4.4 g per sq cm. The data analysis indicates that the integral flux ratios above 1.3 GeV per nucleus and 23 GeV per nucleus are consistent with energy independence.
    Schlagwort(e): CHEMISTRY
    Materialart: Astrophysics and Space Science; 28; May 1974
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  • 38
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    Determination of left ventricular size and shape (1974)
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    Publikationsdatum: 2011-08-16
    Beschreibung: Significant advances have occurred over the past 15 years in the ability to measure ventricular dimensions. Angiocardiography still remains the most reliable method for overall determination of chamber size and shape and serves as a standard for calibration or comparison for newer methods. Improvements in the use of radiographic methods over the next few years are anticipated with more extensive use of multiplane studies associated with repeated injections of improved contrast materials that produce fewer physiological effects or with substances that adhere to the endocardial surfaces. It is also anticipated that existing methods for automatically obtaining dimensional information from X rays will be continued and improved.
    Schlagwort(e): BIOSCIENCES
    Materialart: Circulation Research; 34; Jan. 197
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  • 39
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    The chemisorption of H2O, HCOOH and CH3COOH on thin amorphous films of Al2O3 (1974)
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    Publikationsdatum: 2011-08-16
    Beschreibung: Investigation of the irreversible chemisorption of water, formic acid and acetic acid on a thin amorphous aluminum oxide film, using inelastic tunneling spectroscopy. All of the tunnel junctions employed were Al-Al2O3-Pb junctions with the adsorbate on the Al2O3 surface between the Al2O3 and the Pb electrode. The results obtained include the finding that all Al2O3 surfaces prepared by oxidation of Al have free CH groups present on them.
    Schlagwort(e): CHEMISTRY
    Materialart: Surface Science; 41; 1, Ja; Jan. 197
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  • 40
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    Oxygen and hydrogen atom concentration profiles in the premixed propane/oxygen flame (1974)
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    Publikationsdatum: 2011-08-16
    Beschreibung: The oxygen and hydrogen free radical (atom) concentration profiles in the premixed propane/oxygen flame at 92.5% oxygen were determined using electron spin resonance (ESR) spectroscopy techniques. The ESR instrument was specially modified so that the flame can be probed for determining the oxygen and hydrogen atom population densities during the actual combustion process of propane burning in oxygen. The technique used for propane is similar to that suggested by Fristrom and Westenberg to measure the free radical concentration profiles in C-C hydrocarbon/oxygen combustion.
    Schlagwort(e): CHEMISTRY
    Materialart: Thermochimica Acta; 8; Apr. 197
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  • 41
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    Serotonin and pituitary-adrenal function (1974)
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    Publikationsdatum: 2011-08-16
    Beschreibung: An investigation is conducted to evaluate the response of the pituitary-adrenal system to a stress stimulus in the rat. In the investigation brain serotonin synthesis was inhibited with p-chlorophenylalanine. In other tests the concentration of serotonin was enhanced with precursors such as tryptophan or 5-hydroxytryptophan. On the basis of the results obtained in the study it is speculated that in some disease states there is a defect in serotonergic neuronal processes which impairs pituitary-adrenal feedback mechanisms.
    Schlagwort(e): BIOSCIENCES
    Materialart: Nature; 248; Mar. 29
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  • 42
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    The physical interaction of nitrogen with Pyrex, stainless steel, and nickel at very low pressure (1974)
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    Publikationsdatum: 2011-08-16
    Schlagwort(e): CHEMISTRY
    Materialart: Journal of Vacuum Science and Technology; 11; Jan
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  • 43
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    Life span and fine structural changes in oxygen-poisoned drosophila melanogaster (1974)
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    Publikationsdatum: 2011-08-16
    Schlagwort(e): BIOSCIENCES
    Materialart: Aerospace Medicine; 45; Mar. 197
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  • 44
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    Production of organic molecules by proton irradiation (1974)
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    Publikationsdatum: 2011-08-16
    Beschreibung: Preliminary experiments were carried out to investigate the effectiveness of proton irradiation for producing organic chromophores. The source of the 2 MeV protons used in the experiments was a model Van de Graaff accelerator. The gas cells used were hollow aluminum cylinders. The test results show that energetic protons can be an effective energy source for the formation of complex molecules from simple ones. With the exception of sulfide compounds none of the molecules that were identified are colored. However, coloring agents could be contained in unresolvable fractions.
    Schlagwort(e): CHEMISTRY
    Materialart: Nature; 247; Jan. 11
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  • 45
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    Internal pressures and molecular dimensions in aqueous solutions of some chlorides (1974)
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    Publikationsdatum: 2011-08-16
    Beschreibung: On the basis of measurements of the velocity of ultrasounds in aqueous solutions of some alkaline-earth chlorides (MgCl2, CaCl2, BaCl2) the concentration and temperature dependences of the internal pressure were determined. Using these results, as well as surface tension measurements, the mean diameters of the molecular species as a function of concentration and temperature, were determined.
    Schlagwort(e): CHEMISTRY
    Materialart: The 4th Natl. Conf. on Acoustics, Vol. 2, B (NASA-TT-F-15663); p 172-176
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  • 46
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    Checking the statistical theory of liquids by ultraacoustic measurements (1974)
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    Publikationsdatum: 2011-08-16
    Beschreibung: The manner of theoretically obtaining radial distribution functions 9(r) for n-hexane as a function of temperature is described. With the aid of function g(r) the coefficient of dynamic viscosity and the coefficient of volumetric viscosity for temperatures ranging from 213 K to 273 K were calculated. With the aid of the two coefficients of viscosity the coefficient of absorption of ultrasounds in n-hexane referred to the square of the frequency was determined. The same values were measured experimentally. Comparison of theory with experiments resulted in satisfactory agreement.
    Schlagwort(e): CHEMISTRY
    Materialart: The 4th Natl. Conf. on Acoustics, Vol. 2, B (NASA-TT-F-15663); p 166-171
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  • 47
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    Molecular compressibility of some halides in alcohols (1974)
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    Publikationsdatum: 2011-08-16
    Beschreibung: After measuring ultrasonic velocity and density, the molecular compressibility values from Wada's formula were calculated, for alkali metal halide solutions in methyl, ethyl, butyl, and glycol alcohol. The temperature and concentration dependence were studied, finding deviations due to the hydrogen bonds of the solvent.
    Schlagwort(e): CHEMISTRY
    Materialart: The 4th Natl. Conf. on Acoustics, Vol. 2, B (NASA-TT-F-15663); p 158-161
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  • 48
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    Irregular bilayer structure in vesicles prepared from Halobacterium cutirubrum lipids (1974)
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    Publikationsdatum: 2011-08-16
    Beschreibung: Fluorescent probes were used to study the structure of the cell envelope of Halobacterium cutirubrum, and, in particular, to explore the effect of the heterogeneity of the lipids in this organism on the structure of the bilayers. The fluorescence polarization of perylene was followed in vesicles of unfractionated lipids and polar lipids as a function of temperature in 3.4 M solutions of NaCl, NaNO3, and KSCN, and it was found that vesicles of unfractionated lipids were more perturbed by chaotropic agents than polar lipids. The dependence of the relaxation times of perylene on temperature was studied in cell envelopes and in vesicles prepared from polar lipids, unfractionated lipids, and mixtures of polar and neutral lipids.
    Schlagwort(e): BIOSCIENCES
    Materialart: Biochimica et Biophysica Acta; 356; 1974
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  • 49
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    Human radiation tolerance (1974)
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    Publikationsdatum: 2011-08-16
    Beschreibung: The acute radiation syndrome in man is clinically bounded by death at high dose levels and by the prodromal syndrome of untoward physiological effects at minimal levels of clinically effective exposure. As in lower animals, man experiences principally three acute modes of death from radiation exposure (Bond et al., 1965). These are known collectively as the lethal radiation syndromes: central nervous system death, gastrointestinal death, and hematopoietic death. The effect of multiple exposure on lethality, the effect of multiple exposure on hematopoietic recovery, and quantitative aspects of cell and tissue repair are discussed.
    Schlagwort(e): BIOSCIENCES
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  • 50
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    Ultrastructural response of rat lung to 90 days' exposure to oxygen at 450 mm Hg (1974)
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    Publikationsdatum: 2011-08-16
    Beschreibung: Young Sprague-Dawley rats were exposed to 100% oxygen at 450 mm Hg in constant environment capsules for 90 days. Lung tissue examined by electron microscopy revealed a number of changes, many similar to those observed after exposure to oxygen at 760 mm Hg for shorter periods of time. Alterations in vesicle size and number and in mitochondrial matrix and cristae appear in both the endothelial and epithelial cells. Blebbing and rarefication of cytoplasm occur in both cell layers of the alveolo-capillary wall. Also seen are fluid in the basement membrane, platelets in the capillaries, and alveolar fluid and debris. All of these alterations occur at 1 atm exposure. However, after exposure to 450 mm Hg the changes are not as widespread nor as destructive as they are at the higher pressure.
    Schlagwort(e): BIOSCIENCES
    Materialart: Aerospace Medicine; 45; Sept
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  • 51
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    Detection of dilute organic acids in water by inelastic tunneling spectroscopy (1974)
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    Publikationsdatum: 2011-08-16
    Beschreibung: Study of inelastic electron tunneling spectroscopy (IETS) spectra obtained from junctions exposed to dilute solutions of organic molecules in both liquid and vapor phases. The results indicate that it is possible in principle to detect the presence and to measure the concentration of at least some organic molecules in dilute aqueous solution by means of the IETS technique. Some fine points pertaining to the application of this technique are discussed, and it is pointed out that through appropriate refinements IETS may become a valuable tool for analytical water chemistry.
    Schlagwort(e): CHEMISTRY
    Materialart: Surface Science; 43; 2, Ju; June 197
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  • 52
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    Studies of aircraft wake chemistry and dispersion (1974)
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    Publikationsdatum: 2011-08-16
    Beschreibung: Use of aerospace technology to study aircraft wakes is reviewed. It is shown how aerospace vehicles can be used to provide data for increased understanding of the atmosphere and of aircraft exhaust trails where knowledge is inadequate to evaluate fully the potential impact of the engine emissions. Models of aircraft near-field exhaust wakes are characterized by jet, vortex, and dispersion regimes. Wake growth in the jet regime is self-determined and rapid, whereas further spreading is inhibited in the vortex regime because of circulating vortex motion. Wake diffusion in the dispersion regime is initially influenced by aircraft induced turbulence but is dominated later by small-scale atmospheric turbulence. Computed fluid mechanical results show the importance of effects such as wake buoyancy, wind shear, turbulence, and traffic corridor exhaust buildup on dispersion of the wake. In the jet regime the exhaust characteristics and thermochemistry serve to illustrate initial chemical changes involving potential pollutant species.
    Schlagwort(e): CHEMISTRY
    Materialart: Acta Astronautica; 1; Jan
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  • 53
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    Microbial detection method based on sensing molecular hydrogen (1974)
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    Publikationsdatum: 2011-08-16
    Beschreibung: An approach involving the measurement of hydrogen evolution by test organisms was used to detect and enumerate various members of the Enterobacteriaceae group. The experimental setup for measuring hydrogen evolution consisted of a test tube containing two electrodes plus broth and organisms. The test tube was kept in a water bath at a temperature of 35 C. It is pointed out that the hydrogen-sensing method, coupled with the pressure transducer technique reported by Wilkins (1974) could be used in various experiments in which gas production by microorganisms is being measured.
    Schlagwort(e): BIOSCIENCES
    Materialart: Applied Microbiology; 27; May 1974
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  • 54
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    Treatment of the external epicondylitis of the humerus with a magnetic field (1974)
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    Publikationsdatum: 2011-08-16
    Beschreibung: The therapeutic effect of a constant and varying magnetic field on epicondylitis of the humerus is studied on ninety patients. Good results are obtained from the treatment (recovery of 80%, considerable improvement in 14.5%). The method is recommended for clinical application.
    Schlagwort(e): BIOSCIENCES
    Materialart: Studies in Geomagnetism, Aeronomy and Solar Phys. (NASA-TT-F-15862); p 191-197
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  • 55
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    Effect of magnetic bracelets on the coagulation and anticoagulation systems of the blood of patients with hypertension (1974)
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    Publikationsdatum: 2011-08-16
    Beschreibung: The data which have been obtained on the influence of magnetic bracelets on the coagulation and anticoagulation systems of the blood indicate that the wearing of magnetic bracelets results in a decrease in the coagulation activity of the blood and an increase in the activity of the anticoagulation system. These changes must be viewed as favorable for patients with cardiovascular pathology.
    Schlagwort(e): BIOSCIENCES
    Materialart: Studies in Geomagnetism, Aeronomy and Solar Phys. (NASA-TT-F-15862); p 167-190
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  • 56
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    Changes in the fibrinogen-fibrin system following a 20-hour exposure of rabbits to a magnetic field (1974)
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    Publikationsdatum: 2011-08-16
    Beschreibung: Prolonged exposure of animals to a constant magnetic field resulted in a sharp increase in the amount of fibrinogen. The addition of EACA to the plasma of experimental rabbits as well as protamine sulfate caused an additional increase in the amount of fibrinogen. A 20-hour exposure was accompanied by phenomena of paralysis of the pelvic limbs and death of some of the animals.
    Schlagwort(e): BIOSCIENCES
    Materialart: Studies in Geomagnetism, Aeronomy and Solar Phys. (NASA-TT-F-15862); p 163-166
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  • 57
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    Influence of a constant magnetic field on the fibrinogen-fibrin system (1974)
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    Publikationsdatum: 2011-08-16
    Beschreibung: The effect of a constant magnetic field with a strength of 2500 oersteds on the fibrinogen-fibrin system was studied in the organism of healthy rabbits with exposure times of 1 and 5 hours. The results obtained indicate disruptions in the stage of conversion of fibrinogen to fibrin and an increase in the amount of fibrinogen.
    Schlagwort(e): BIOSCIENCES
    Materialart: Studies in Geomagnetism, Aeronomy and Solar Phys. (NASA-TT-F-15862); p 157-161
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  • 58
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    Influence of a constant magnetic field on thrombocytes (1974)
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    Publikationsdatum: 2011-08-16
    Beschreibung: In an experiment on white mice it was found that a constant electromagnetic field with strength of 250-275 oersteds is biologically active at an exposure of 55 minutes. Qualitative and morphological changes in thrombocytes 1-3 days following exposure reduced their numbers, prolonged blood coagulation time and increased the number of leucocytes.
    Schlagwort(e): BIOSCIENCES
    Materialart: Studies in Geomagnetism, Aeronomy and Solar Phys. (NASA-TT-F-15862); p 141-147
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  • 59
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    The protective effect of a constant magnetic field (1974)
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    Publikationsdatum: 2011-08-16
    Beschreibung: The protective effect of a constant magnetic field sharply reduced spontaneous lysis of E. coli cells when subjected to ultraviolet radiation. A protective effect of a CMF was found in a study of tissue cultures of normally growing cells (kidney epithelium) and cancer cells (cells from a cancer of the larynx). The protective effect of a CMF is also seen in a combined exposure of tissue cultures to X-rays and CMF energy (strength of the CMF was 2000 oersteds with a gradient of 500 oersteds/cm). The data obtained are of interest to experimental oncology (development of new methods of treating malignant tumors).
    Schlagwort(e): BIOSCIENCES
    Materialart: Studies in Geomagnetism, Aeronomy and Solar Phys. (NASA-TT-F-15862); p 148-156
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  • 60
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    Method of magnetobiological indication in clinical laboratory practice (1974)
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    Publikationsdatum: 2011-08-16
    Beschreibung: Data are presented on the use of the method of magnetobiological indication for defining the immunobiological state of patients with very serious diseases. It has been found that the enzymes of a patient react more sensitively to the energy from a magnetic field. It is important that the magnetoreactivity of the enzymes, like the cell forms of the blood in the patients, have a certain relationship to the clinical-nosological forms and the dynamics of the illness of the subject.
    Schlagwort(e): BIOSCIENCES
    Materialart: Studies in Geomagnetism, Aeronomy and Solar Phys. (NASA-TT-F-15862); p 129-140
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  • 61
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    Influence of a constant and variable magnetic field on the coagulation of human blood in vitro and in vivo (1974)
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    Publikationsdatum: 2011-08-16
    Beschreibung: The influence of constant and varying magnetic fields on the coagulation of the blood was studied in experiments performed in vitro and vivo. In the in vitro tests it was found that a constant magnetic field with a strength of 100 or 200 oersteds influences the coagulation of the blood, retarding it in some cases and speeding up the coagulation time in others. In the in vivo studies, both retarding and accelerating effects were likewise observed with respect to the coagulation of the blood, but the nature of the change was a function of the background. A normalizing effect of the magnetic field on the coagulation of the blood was observed.
    Schlagwort(e): BIOSCIENCES
    Materialart: Studies in Geomagnetism, Aeronomy and Solar Phys. (NASA-TT-F-15862); p 124-128
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  • 62
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    Change in fibrinolytic activity under the influence of a constant magnetic field (1974)
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    Publikationsdatum: 2011-08-16
    Beschreibung: The fibrinolytic activity of plasma changes under the influence of a constant magnetic field (CMF) with a strength of 250 or 2500 oersteds. CMF shows a tendency toward normalization of fibrinolytic processes in the presence of pathological disturbances in fibrinolysis activation.
    Schlagwort(e): BIOSCIENCES
    Materialart: Studies in Geomagnetism, Aeronomy and Solar Phys. (NASA-TT-F-15862); p 117-123
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  • 63
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    Change in blood coagulation indices as a function of the incubation period of plasma in a constant magnetic field (1974)
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    Publikationsdatum: 2011-08-16
    Beschreibung: The influence of a constant magnetic field (CMF) with a strength of 250 and 2500 oersteds on the recalcification reaction and the tolerance of plasma to heparin was studied as a function of the exposure time of the plasma to the CMF. The maximum and reliable change in the activation of the coagulatory system of the blood was observed after a 20-hour incubation of the plasma in a CMF. As the exposure time increased, the recalcification reaction changed insigificantly; the difference between the mean arithmetic of the experiment and control values was not statistically reliable. The tolerance of the plasma to heparin as a function of the exposure time to the CMF of the plasma was considerably modified, an was statistically reliable.
    Schlagwort(e): BIOSCIENCES
    Materialart: Studies in Geomagnetism, aeronomy and Solar Phys. (NASA-TT-F-15862); p 109-116
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  • 64
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    Repeated action of a constant magnetic field on the blood coagulation system in artificially produced anemia (1974)
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    Publikationsdatum: 2011-08-16
    Beschreibung: Changes are discussed in the coagulatory system of the blood in rabbits under the influence of a constant magnetic field of an intensity of 2500 oersteds against the background of artificially induced anemia. Reversibility of the changes produced and the presence of the adaptational effect are noted. Taking all this into consideration, the changes involving the coagulatory system of the blood which arise under the influence of a constant magnetic field may be considered to have a nerve-reflex nature.
    Schlagwort(e): BIOSCIENCES
    Materialart: Studies in Geomagnetism, Aeronomy and Solar Phys. (NASA-TT-F-15862); p 97-108
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  • 65
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    The influence of a constant magnetic field on the coagulatory system of the blood in an experiment (1974)
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    Publikationsdatum: 2011-08-16
    Beschreibung: The influence of a constant magnetic field with a strength of 2500 oersteds on the coagulatory system of the blood in rabbits was studied; the animals were subjected to this field for one and five hours. The magnetic field acts on the coagulatory system of the blood after only one hour exposure. Repeated 5-hour exposures cause activation of the anticoagulatory system in the blood and causes distinctive effects on the subsequent changes in the coagulatory system of the blood. It is quite likely that in this instance the adaptational properties of the organism make themselves felt.
    Schlagwort(e): BIOSCIENCES
    Materialart: Studies in Geomagnetism, Aeronomy and Solar Phys. (NASA-TT-F-15862); p 82-96
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  • 66
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    Effect of a magnetic field of extremely low intensity on the coagulatory system of the blood (1974)
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    Publikationsdatum: 2011-08-16
    Beschreibung: The influence of a magnetic field of 10,000 gamma on the conditions of the coagulatory system of rabbits was studied. The results from a number of experiments indicate that the action of a very weak magnetic field produces an increase in the coagulatory activity of the blood.
    Schlagwort(e): BIOSCIENCES
    Materialart: Studies in Geomagnetism, Aeronomy and Solar Phys. (NASA-TT-F-15862); p 73-81
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  • 67
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    Reactions of the nervous system to magnetic fields (1974)
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    Publikationsdatum: 2011-08-16
    Beschreibung: This magnetobiological survey considers sensory, nervous, stress and genetic effects of magnetic fields on man and animals. It is shown that the nervous system plays an important role in the reactions of the organism to magnetic fields; the final biological effect is a function of the strength of the magnetic fields, the gradient, direction of the lines of force, duration and location of the action, and the functional status of the organism.
    Schlagwort(e): BIOSCIENCES
    Materialart: Studies in Geomagnetism, Aeronomy and Solar Phys. (NASA-TT-F-15862); p 59-72
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  • 68
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    Results of comparison of the dynamics of the epidemic process with changes in the planetary index of magnetic disturbance (1974)
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    Publikationsdatum: 2011-08-16
    Beschreibung: Possible pathways for the action of factors related to solar activity and its magnetic effects on the epidemic process are discussed.
    Schlagwort(e): BIOSCIENCES
    Materialart: Studies in Geomagnetism, Aeronomy and Solar Phys. (NASA-TT-F-15862); p 31-38
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  • 69
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    Statistical evaluation of the significance of the influence of abrupt changes in solar activity on the dynamics of the epidemic process (1974)
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    Publikationsdatum: 2011-08-16
    Beschreibung: Statistical evaluations of the significance of the relationship of abrupt changes in solar activity and discontinuities in the multi-year pattern of an epidemic process are reported. They reliably (with probability of more than 99.9%) show the real nature of this relationship and its great specific weight (about half) in the formation of discontinuities in the multi-year pattern of the processes in question.
    Schlagwort(e): BIOSCIENCES
    Materialart: Studies in Geomagnetism, Aeronomy and Solar Phys. (NASA-TT-F-15862); p 49-58
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  • 70
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    The problem of the periodicity of the epidemic process (1974)
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    Publikationsdatum: 2011-08-16
    Beschreibung: An analysis of data from epidemics makes it possible to determine their principal causes, governed by environmental factors (solar activity, etc.) The results of an analysis of the periodicity of the epidemic process in the case of diphtheria are presented which was conducted with the aid of autocorrelation and spectral methods of analysis. Numerical data (annual figures) are used on the dynamics of diphtheria in 50 regions (points) with a total duration of 2,777 years.
    Schlagwort(e): BIOSCIENCES
    Materialart: Studies in Geomagnetism, Aeronomy and Solar Phys. (NASA-TT-F-15862); p 39-48
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  • 71
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    The influence of weather on fibrinolysis and fibrinogenolysis (1974)
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    Publikationsdatum: 2011-08-16
    Beschreibung: Analysis of fibrinolysis and fibrinogenolysis indices by month showed an increase in the activity of these processes from winter to summer (1967-1968). At all seasons of the year, fibrinolysis and fibrinogenolysis increase during weather of the cyclonic type with passage of fronts and sharp fluctuations in meteorological factors in the atmosphere.
    Schlagwort(e): BIOSCIENCES
    Materialart: Studies in Geomagnetism, Aeronomy and Solar Phys. (NASA-TT-F-15862); p 24-30
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  • 72
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    Fibrinolysis and fibrinogenolysis on magnetically-active days (1974)
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    Publikationsdatum: 2011-08-16
    Beschreibung: On magnetically-active days, activation of fibrinolysis and fibrinogenolysis is observed. The increase in fibrinolysis and fibrinogenolysis begins on the day of the onset of a magnetic storm, reaching a maximum in 24 hours. Activation is higher on days with magnetic storms with a sudden onset and a C index of 1.5-2.0.
    Schlagwort(e): BIOSCIENCES
    Materialart: Studies in Geomagnetism, Aeronomy and Solar Phys. (NASA-TT-F-15862); p 16-20
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  • 73
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    Influence of synoptic processes on fibrinolysis and fibrinogenolysis in healthy persons (1974)
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    Publikationsdatum: 2011-08-16
    Beschreibung: It is shown that on days with frontal activity in the atmosphere the levels of fibrinolysis and fibrinogenolysis are increased. The reactions of fibrinolysis and fibrinogenolysis to the passage of warm and cold fronts varies with the season of the year.
    Schlagwort(e): BIOSCIENCES
    Materialart: Studies in Geomagnetism, Aeronomy and Solar Phys. (NASA-TT-F-15862); p 20-23
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  • 74
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    Influence of solar activity on fibrinolysis and fibrinogenolysis (1974)
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    Publikationsdatum: 2011-08-16
    Beschreibung: During periods of high solar activity fibrinolysis and fibrinogenolysis are increased. A direct correlative relationship is established between the indices of fibrinolysis, fibrinogenolysis and solar flares which were recorded two days before the blood was collected for analysis.
    Schlagwort(e): BIOSCIENCES
    Materialart: Studies in Geomagnetism, Aeronomy and Solar Phys. (NASA-TT-F-15862); p 12-15
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  • 75
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    Notes on the concept of normal values employed in clinical practice (1974)
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    Publikationsdatum: 2011-08-16
    Beschreibung: The question of the considerable variations in various blood parameters under the influence of changes in environmental factors is discussed. Recommendations are given that so-called normal values should be given special attention. Fibrinolytic and fibrinogenolytic activity studies on the blood in healthy human beings revealed significant differences for individual months and even on specific days. Changes in the activity of fibrinolysis and fibrinogenolysis show a correlation with changes in the meteorological conditions, seasonal variations and changes in solar activity.
    Schlagwort(e): BIOSCIENCES
    Materialart: Studies in Geomagnetism, Aeronomy and Solar Phys. (NASA-TT-F-15862); p 9-11
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  • 76
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    Heliobiology, its development, successes and tasks (1974)
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    Publikationsdatum: 2011-08-16
    Beschreibung: Heliobiology studies the influence of changes in solar activity on life. Considered are the influence of periodic solar activity on the development and growth of epidemics, mortality from various diseases, the functional activity of the nervous system, the development of psychic disturbances, the details of the development of microorganisms and many other phenomena in the living world.
    Schlagwort(e): BIOSCIENCES
    Materialart: Studies in Geomagnetism, Aeronomy and Solar Phys. (NASA-TT-F-15862); p 1-8
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  • 77
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    Ultrasonic filtration of industrial chemical solutions (1974)
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    Publikationsdatum: 2011-08-16
    Beschreibung: The practical results obtained as a result of filtering industrial chemical solutions under continuous flow conditions with the aid of an ultrasonic filter are presented. The main part of the assembly consists of an ultrasonic generator with an output power of about 400 W and the filtration assembly, in which there is a magnetostrictive amplifier constructed for 20.5 kHz. In addition to ensuring a continuous flow of filtered solution, ultrasonic filters can be replaced or cleaned at intervals of time that are 8-10 times greater than in the case of mechanical filters. They yield considerably better results as far as the size of the filtered particles is concerned. The parameters on which filtration quality depends are also presented.
    Schlagwort(e): CHEMISTRY
    Materialart: The 4th Natl. Conf. on Acoustics, Vol. 2, B (NASA-TT-F-156631); p 153-157
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  • 78
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    Effects of ultrasonic fields in the phosphoric acid process (1974)
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    Publikationsdatum: 2011-08-16
    Beschreibung: A process of apatite decomposition with sulfuric acid was studied under the influence of ultrasound in the phosphoric acid production process. The studies were carried out with and without ultrasonic fields in the reaction mixture, which resembled the mixing ratio used in technical production processes. Ultrasound with a frequency of 20 kHz and an intensity of 1 W/sq cm was used in the studies. A very favorable ultrasonic effect upon the degree of apatite decomposition was observed. The ultrasonic field affects the shape of byproduct gypsum crystals. In the H3PO4 production process without ultrasound, the byproduct gypsum crystallizes as long, thin needles which cause problems in filtration. In the trials involving the application of wound, gypsum crystallized in the form of small platelets possessing a favorable ratio of length to width.
    Schlagwort(e): CHEMISTRY
    Materialart: The 4th Natl. Conf. on acoustics, Vol. 2, B (NASA-TT-F-15663); p 148-152
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  • 79
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    Acoustic properties of organic acid mixtures in water (1974)
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    Publikationsdatum: 2011-08-16
    Beschreibung: The variation of the rate of propagation of ultrasounds in organic acid mixtures in water points to structural changes caused by interactions that take place under conditions of thermal agitation, at different acid concentrations. At the same time, a difference is found in the changes in velocity as a function of the length of the carbon chain of the acids in the mixture as a result of their effect on the groups of water molecules associated by hydrogen bonds.
    Schlagwort(e): CHEMISTRY
    Materialart: The 4th Natl. Conf. on Acoustics, Vol. 2, B (NASA-TT-F-15663); p 183-188
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  • 80
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    Gas chromatographic separation of water from cryogenically collected air samples - Enhanced concentration of trace organic volatiles prior to GC-MS analyses (1974)
    In:  Other Sources
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    Publikationsdatum: 2011-08-16
    Schlagwort(e): CHEMISTRY
    Materialart: Analytical Chemistry; 46; Apr. 197
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  • 81
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    Natural evidence for chemical and early biological evolution (1974)
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    Publikationsdatum: 2011-08-16
    Beschreibung: Oparin (1924) and Haldane (1929) have independently hypothesized that life arose under reducing conditions through an evolutionary sequence of events involving increasingly complex organic substances. The natural evidence for this hypothesis of chemical evolution is considered, giving particular attention to tangible samples which have been chemically analyzed in earth-bound laboratories. It is found that meteorites provide naturally occurring evidence in support of chemical evolution, but not of biological evolution. Studies on the early Precambrian Swaziland Sequence and the Bulawayan System of southern Africa provide evidence for very early biological evolution.
    Schlagwort(e): CHEMISTRY
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  • 82
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    Rhythmic variation in heart rate and respiration rate during space flight - Apollo 15 (1974)
    In:  Other Sources
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    Publikationsdatum: 2011-08-16
    Beschreibung: As part of the operational biomedical monitoring for Apollo manned missions, ECG and respiration rate are telemetered at selected intervals to mission control. The data were collected as part of this monitoring program. These data were evaluated for circadian and ultradian rhythmicity because of their uniqueness. The ability to detect and quantitate biorhythms in living systems during space flight is an important aspect of evaluating hypotheses concerning the underlying mechanisms of these phenomena. Circadian variation in heart rate during space flight is demonstrated here. In analyzing generated time series data it has been found that period discrimination is much better than the theoretical limit.
    Schlagwort(e): BIOSCIENCES
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  • 83
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    Hydrocortisone and ACTH levels in manned spaceflight (1974)
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    Publikationsdatum: 2011-08-16
    Beschreibung: The plasma hydrocortisone, plasma ACTH, and urinary hydrocortisone values were recorded for each man of the crews of Apollo flights eight through fifteen, 30, 14, and 5 days before flight, immediately after spaceflight recovery, and on future days until the return of most variables to preflight values. The plasma and urinary preflight hydrocortisone values were significantly higher than the postflight values. This result is discussed in terms of three possible explanations: (1) the adrenal-cortical function is suppressed during spaceflight; (2) the activity in flight may amount to stressful exercise, which tests have shown can cause a decrease in plasma adrenocortical hormones; and (3) the in-flight work-rest cycles may be such as to affect the circadian periodicity of the pituitary-adrenal function.
    Schlagwort(e): BIOSCIENCES
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  • 84
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    Fine structure of tannin accumulations in callus cultures of Pinus elliotti /slash pine/ (1974)
    In:  Other Sources
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    Publikationsdatum: 2011-08-16
    Schlagwort(e): BIOSCIENCES
    Materialart: Canadian Journal of Botany; 52; 3, 19; 1974
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  • 85
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    Auditory and visual evoked potentials during hyperoxia (1974)
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    Publikationsdatum: 2011-08-16
    Beschreibung: Experimental study of the auditory and visual averaged evoked potentials (AEPs) recorded during hyperoxia, and investigation of the effect of hyperoxia on the so-called contingent negative variation (CNV). No effect of hyperoxia was found on the auditory AEP, the visual AEP, or the CNV. Comparisons with previous studies are discussed.
    Schlagwort(e): BIOSCIENCES
    Materialart: Electroencephalography and Clinical Neurophysiology; 37; Oct. 197
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  • 86
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    Oxidative vaporization kinetics of Cr2O3 in oxygen from 1000 to 1300 C (1974)
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    Publikationsdatum: 2011-08-16
    Beschreibung: Rates of oxidative vaporization of Cr2O3 on preoxidized resistively heated chromium were determined in flowing oxygen at a pressure of 0.115 Torr for temperatures from 1000 to 1300 C. Reaction controlled rates were obtained from experimental rates by a gold calibration technique, and these rates were shown to agree with those predicted by thermochemical analysis. The activation energy obtained for the oxidative vaporization reaction corresponded numerically with the thermochemical enthalpy of the reaction. A theoretical equation is given for calculating the rate from thermodynamic data using boundary-layer theory.
    Schlagwort(e): CHEMISTRY
    Materialart: Electrochemical Society; vol. 121
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  • 87
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    Phase relationships between circadian rhythms and the environment in humans during hypokinesis (1974)
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    Publikationsdatum: 2011-08-16
    Schlagwort(e): BIOSCIENCES
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  • 88
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    The action of ultrasounds on Bezostaia 1 winter wheat grown in sand pots treated with Knop solution (1974)
    In:  Other Sources
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    Publikationsdatum: 2011-08-16
    Beschreibung: The results of 3 years of research are presented concerning the increase in length and weight of the aerial biomass as compared with the underground biomass, as well as the productivity indexes of Bezostaia 1 winter wheat. The experiment involved two varieties, each of them with nine repetitions. Sterile sifted sand treated several times with a Knop solution during the vegetative period was used as a seed bed. The seeds were kept in water for 2 hours before treatment. Biometric and statistical measurements showed significant responses in the treated varieties.
    Schlagwort(e): BIOSCIENCES
    Materialart: the 4th Natl. Conf. on Acoustics, Vol. 2, B (NASA-TT-F-15663); p 244-249
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  • 89
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    New experimental contributions to understanding the effect of ultrasonic irradiation on tomatoes (1974)
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    Publikationsdatum: 2011-08-16
    Beschreibung: Irradiation of Aurora 100 tomatoes by a hydrodynamic ultrasonic generator with a frequency of 25 kHz per sec intensifies seed germination and the growth of the plants, causing precosity and increasing the output by 15.63 to 37.65%. The most effective radiation time (between 20 and 40 min) intensifies the phenophases. It causes some increase in output and changes in the chemical compositions of the fruits.
    Schlagwort(e): BIOSCIENCES
    Materialart: The 4th Natl. Conf. on Acoustics, Vol. 2, B (NASA-TT-F-15663); p 238-242
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  • 90
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    Ultrasonic velocity and adiabatic compressibility in dioxane-water mixtures (1974)
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    Publikationsdatum: 2011-08-16
    Beschreibung: Using a method of diffraction of light on an ultrasonic beam, the velocity of ultrasounds and the adiabatic compressibility in dioxane-water mixtures were determined. The dependence of these quantities on the temperature (in the 15-50 C range) and on the concentration (0-100%) were studied. For each temperature there was found a velocity maximum and a compressibility minimum for a given value of the dioxane concentration. The different behavior of these mixtures is due to intense interactions between the molecules of the two liquids composing the mixture.
    Schlagwort(e): CHEMISTRY
    Materialart: the 4th Natl. Conf. on Acoustics, Vol. 2, B (NASA-TT-F-15663); p 189-193
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  • 91
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    Echocardiography of the aortic valve. I - Studies of normal aortic valve, aortic stenosis, aortic regurgitation, and mixed aortic valve disease (1974)
    In:  Other Sources
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    Publikationsdatum: 2011-08-16
    Schlagwort(e): BIOSCIENCES
    Materialart: British Heart Journal; 36; Apr. 197
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  • 92
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    Effect of bioisolation and the intestinal flora of mice upon evaluation of an Apollo diet (1974)
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    Publikationsdatum: 2011-08-16
    Schlagwort(e): BIOSCIENCES
    Materialart: Aerospace Medicine; 45; May 1974
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  • 93
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    The lower ionosphere of Venus (1974)
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    Publikationsdatum: 2011-08-16
    Beschreibung: Galactic cosmic ray bombardment provides a permanent background ionosphere in planetary atmospheres. A transport technique is used to compute the cosmic ray ionization rate profile in a model of the Venusian atmosphere at altitudes between 55 and 100 km. These ionization rates are then applied to a model of ion chemistry to predict equilibrium electron and ion density profiles. Ionization rates for typical solar flare proton events are available from earlier calculations and have been included.
    Schlagwort(e): CHEMISTRY
    Materialart: Planetary and Space Science; 22; Apr. 197
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  • 94
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    Approximate spin projection of three-component UHF wavefunctions - The states of the pentachlorocyclopentadienyl cation and the croconate dianion, C5O5/2-/ (1974)
    In:  Other Sources
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    Publikationsdatum: 2011-08-16
    Beschreibung: The approximate spin projection method of Amos et al. is extended to handle UHF wave functions having three significant components of differing multiplicity. An expression is given for the energy after single annihilation which differs from that of Amos and Hall. The new expression reproduces the results obtained from a previous exact calculation for which the weights and energies of the components are known. The extended approximate projection method is applied to the pi-electron UHF wave functions for the ground states of the pentachlorocyclopentadienyl cation and the croconate dianion, C5O5(2-). The results indicate a triplet ground state for the former and a singlet ground state for the latter, in agreement with experimental ESR susceptibility measurements for these molecular ions. C5C15(-) cannont be treated by restricted Hartree-Fock theory, due to its open-shell ground state. Incorrect results are obtained for the croconate dianion, if restricted Hartree-Fock theory and singly excited configuration interactions are utilized.
    Schlagwort(e): CHEMISTRY
    Materialart: Journal of Chemical Physics; 60; Feb. 15
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  • 95
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    Thin-layer assay of chlorophyll and analogous dry-column separation with effluent fluorometry (1974)
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    Publikationsdatum: 2011-08-16
    Schlagwort(e): CHEMISTRY
    Materialart: Journal of Chromatography; 88; 1974
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  • 96
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    Restudy of pyroxene-pyroxene equilibration temperature for ordinary chondrite meteorites (1974)
    In:  Other Sources
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    Publikationsdatum: 2011-08-16
    Beschreibung: Experimental verification of the conclusions of Van Schmus and Koffman (1967) that the equilibration temperatures of ordinary chondrites are roughly the same regardless of classification, and that these temperatures range from 770 to 860 C. The higher average relative equilibrium temperatures found are attributed to improvements in microprobe techniques, and better standards and correction procedures introduced over the last six years. Agreement is expressed with their conclusion that ordinary chondrites embody equilibria achieved within the metamorphic temperature regime and not under igneous temperatures as postulated earlier by Craig (1964) and Mueller (1964).
    Schlagwort(e): CHEMISTRY
    Materialart: Contributions to Mineralogy and Petrology; 43; 1974
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  • 97
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    Angiotensinase activity of dipeptidyl aminopeptidase I /cathepsin C/ of rat liver (1974)
    In:  Other Sources
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    Publikationsdatum: 2011-08-16
    Schlagwort(e): BIOSCIENCES
    Materialart: Journal of Biological Chemistry; 249; Jan. 10
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  • 98
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    Identification and dissociation energy of gaseous hafnium mononitride (1974)
    In:  Other Sources
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    Publikationsdatum: 2011-08-16
    Schlagwort(e): CHEMISTRY
    Materialart: Journal of Physical Chemistry; 78; Jan. 31
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  • 99
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    Role of gravity in preparative electrophoresis (1974)
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    Publikationsdatum: 2019-01-25
    Beschreibung: Electrophoresis has contributed significantly to the methodology of biological sciences, and shows the potential for large scale fractionation of a wide range of medically important substances, including living cells. Gravity plays an important role in the electrophoretic process, and hence the importance of the NASA effort to develop a zero-gravity separation facility as part of its shuttle program. The current state of art in electrophoresis is reviewed with particular emphasis on the role of gravity and the possible use of istachophoresis. This technique utilizes a discontinuous buffer system, and appears to be the only high resolution electrophoretic technique currently available for separation of living cells.
    Schlagwort(e): BIOSCIENCES
    Materialart: Proc. of the 3d Space Processing Symp. on Skylab Results, Vol. 2; p 729-253
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  • 100
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    Quantitation and detection of vanadium in biologic and pollution materials (1974)
    In:  CASI
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    Publikationsdatum: 2019-06-27
    Beschreibung: A review is presented of special considerations and methodology for determining vanadium in biological and air pollution materials. In addition to descriptions of specific analysis procedures, general sections are included on quantitation of analysis procedures, sample preparation, blanks, and methods of detection of vanadium. Most of the information presented is applicable to the determination of other trace elements in addition to vanadium.
    Schlagwort(e): CHEMISTRY
    Materialart: NASA-TM-X-71497 , E-7853
    Format: application/pdf
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