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  • Other Sources  (124)
  • SPACE RADIATION  (85)
  • BIOTECHNOLOGY  (39)
  • Cell & Developmental Biology
  • Chemical Engineering
  • 1980-1984
  • 1970-1974  (124)
  • 1955-1959
  • 1950-1954
  • 1974  (124)
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  • 1980-1984
  • 1970-1974  (124)
  • 1955-1959
  • 1950-1954
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  • 21
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    Hard X-ray observations of the region from the galactic center to Centaurus (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: A balloon flight from Parana, Argentina, was conducted to observe emissions from discrete or extended sources in the southern sky. The sources observed include GX 304-1, Nor X-2, GX 340+0, GX 354-5, a possibly composite source near the galactic center, and the nova-like source (2U1543-47) in the Lupus-Norma region which has been reported previously only in satellite observations. Data concerning the possibility of line emission near 0.5 MeV from different regions of the southern sky are also presented.
    Keywords: SPACE RADIATION
    Type: International Cosmic Ray Conference; Aug 17, 1973 - Aug 30, 1973; Denver, CO
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  • 22
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    Relative abundances and energy spectra of solar cosmic ray nuclei in the August 4, 1972 event (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Keywords: SPACE RADIATION
    Type: International Cosmic Ray Conference; Aug 17, 1973 - Aug 30, 1973; Denver, CO
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  • 23
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    Variations in the nuclear abundances in solar particle events (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Measurements of the flux of helium nuclei in the 24 January 1971 event and of helium and (C, N, O) nuclei in the 1 September 1971 event are combined with previous measurements to obtain the relative abundances of helium, (C, N, O), and Fe-group nuclei in these events. These data are then summarized together with previously reported results to show that, even when the same detector system using a dE/dx plus range technique is used, differences in the He/(C, N, O) value in the same energy/nucleon interval are observed in solar cosmic ray events. Further, when the He/(C, N, O) value is lower the He/(Fe-group nuclei) value is also systematically lower in these large events.
    Keywords: SPACE RADIATION
    Type: International Cosmic Ray Conference; Aug 17, 1973 - Aug 30, 1973; Denver, CO
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  • 24
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    Production of gamma rays with energies greater than 30 MeV in the atmosphere (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: A three-dimensional study of atmospheric gamma rays with energy greater than 30 MeV has been carried out. Experimental results were obtained from four balloon flights from Palestine, Texas, with a 15 cm by 15 cm digitized wire grid spark chamber. The energy spectrum for downward-moving gamma rays steepens with increasing atmospheric depth. Near the top of the atmosphere, the spectrum steepens with increasing zenith angle. Experimental results compare reasonably well with a three-dimensional Monte Carlo calculation of atmospheric gamma ray production. Inclusion of upward-moving gamma rays makes possible the use of atmospheric secondaries for in-flight calibration of satellite gamma ray detectors.
    Keywords: SPACE RADIATION
    Type: International Cosmic Ray Conference; Aug 17, 1973 - Aug 30, 1973; Denver, CO
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  • 25
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    Rigidity spectrum of z greater than or equal to 3 cosmic-ray nuclei in the range 4-285 GV and a search for cosmic antimatter (1974)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: A measurement, using the magnetic emulsion spectrometer system, of the differential rigidity spectrum of Z greater than or equal to 3 nuclei of the galactic cosmic radiation is presented. The system was flown on Aug. 22, 1969, from Palestine, Texas. The instrument floated above 125,000 feet for eight hours. The data in the rigidity range 8-285 GV can be represented by a power-law spectrum in rigidity, J(rho) = A rho to the minus gamma power, with the exponent gamma = 2.6 plus or minus 0.10. The spectrum in the range 15-285 GV is also described by the same exponent, gamma = 2.6 plus or minus 0.25. The data below 8 GV cannot be described by the same power law without invoking solar modulation. A set of nonunique parameters for modulation are given. Upper limit for the fraction of antimatter in the rigidity range 4-125 GV is .005 with 95% confidence limit.
    Keywords: SPACE RADIATION
    Type: Astrophysical Journal; 192; Sept. 15
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  • 26
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    Oxygen utilization of the human left ventricle - An indirect method for its evaluation and clinical considerations (1974)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: An analytical method is presented for determining the oxygen consumption rate of the intact heart working (as opposed to empty but beating) human left ventricle. Use is made of experimental recordings obtained for the chamber pressure and the associated dimensions of the LV. LV dimensions are determined by cineangiocardiography, and the chamber pressure is obtained by means of fluid-filled catheters during retrograde or transeptal catheterization. An analytical method incorporating these data is then employed for the evaluation of the LV coronary oxygen consumption in five subjects. Oxygen consumption for these subjects was also obtained by the conventional clinical method in order to evaluate the reliability of the proposed method.
    Keywords: BIOTECHNOLOGY
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  • 27
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    Cardiac mechanics: Physiological, clinical, and mathematical considerations (1974)
    In:  Other Sources
    Details
    Publication Date: 2016-03-07
    Description: Recent studies concerning the basic physiological and biochemical principles underlying cardiac muscle contraction, methods for the assessment of cardiac function in the clinical situation, and mathematical approaches to cardiac mechanics are presented. Some of the topics covered include: cardiac ultrastructure and function in the normal and failing heart, myocardial energetics, clinical applications of angiocardiography, use of echocardiography for evaluating cardiac performance, systolic time intervals in the noninvasive assessment of left ventricular performance in man, evaluation of passive elastic stiffness for the left ventricle and isolated heart muscle, a conceptual model of myocardial infarction and cardiogenic shock, application of Huxley's sliding-filament theory to the mechanics of normal and hypertrophied cardiac muscle, and a rheological modeling of the intact left ventricle. Individual items are announced in this issue.
    Keywords: BIOTECHNOLOGY
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  • 28
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    Sweet's mechanism in the solar wind (1974)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: Sweet (1956, 1958) proposed a mechanism for the rapid, steady-state dissipation of a magnetic field in a resistive plasma. It is shown that Sweet's mechanism operates in the interplanetary medium near 1 AU in structures which Burlaga and Ness (1968) have identified and called D-sheets. The basic equations are considered of a specific mathematical model provided by Parker (1963) for the case of antiparallel fields and incompressible flow. The theoretical conclusions are related to interplanetary observations.
    Keywords: SPACE RADIATION
    Type: Astrophysical Journal; 191; Aug. 1
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  • 29
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    A model of heat transfer in immersed man (1974)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: An equation representing man's thermal balance under water is considered. The equation states that the body thermal loading from metabolic heat production and artificial heat input must be offset by respiratory and environmental heat exchange to maintain a constant body temperature. Critical body regions are affected by cold-water thermal stress. A model of the thermoregulatory system may be divided into the physical-controlled system and the dynamic controlling system. The thermal model is simulated by computer programs.
    Keywords: BIOTECHNOLOGY
    Type: Annals of Biomedical Engineering; 2; 1974
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  • 30
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    1.0 arc second structure on the sun at 3.71 cm wavelength (1974)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Keywords: SPACE RADIATION
    Type: Solar Physics; 36; June 197
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