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  • GEOPHYSICS  (156)
  • Humans  (46)
  • SOLAR PHYSICS  (45)
  • 1980-1984
  • 1975-1979  (247)
  • 1935-1939
  • 1979  (247)
  • 1
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    Nonpneumonic, short-incubation-period Legionellosis (Pontiac fever) in men who cleaned a steam turbine condenser (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-08-17
    Description: Pontiac fever affected ten men who had cleaned a steam turbine condenser with compressed air. Previous epidemics of Pontiac fever and Legionnaires' disease--both caused by Legionella Pneumophila (proposed sp. nov.)--involved "airborne spread" from air-conditioning cooling towers or evaporative condensers. Aerosols of contaminated water in heat-rejection systems appear to be important sources of epidemic legionellosis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fraser, D W -- Deubner, D C -- Hill, D L -- Gilliam, D K -- New York, N.Y. -- Science. 1979 Aug 17;205(4407):690-1.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/462175" target="_blank"〉PubMed〈/a〉
    Keywords: Adolescent ; Air Microbiology ; Humans ; Legionnaires' Disease/*etiology/microbiology/transmission ; Male ; Occupational Medicine ; Time Factors
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    Atmospheric implications of studies of Central American volcanic eruption clouds (1979)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Keywords: GEOPHYSICS
    Type: Journal of Geophysical Research; 84; Nov. 20
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Charge exchange of metastable 2D oxygen ions with molecular oxygen - A new source of thermospheric O2/+/ ions (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Reactions involving metastable ions are difficult to study in the laboratory. Much new information on these reactions has been derived from satellite measurements of aeronomic parameters. In this paper, Atmosphere Explorer D data are used to study charge exchange of metastable O(+)(2D) ions with O2. Using direct measurements of the O2 at 200 km to compute O2 densities at 300 km and supporting ionic concentrations and temperature observations, we find the rate coefficient for this reaction to be 1 + or - 0.6 times 10 to the minus 9th cu cm/sec. The process constitutes a significant source of O2(+) ions in the F2 layer at times when the N2 and O2 densities are enhanced. This finding leads to the conclusion that charge exchange with O2 must be a major sink for O(+)(2D) and an important source of O2(+) ions in the E region, because of the increase in the O2 concentration/N2 concentration ratio with decreasing altitude. The results imply that 80% of all O(+) ions formed in the E region are converted to O2(+) and that only about 20% of the metastable O(+) ions are converted into N2(+) through charge exchange with N2.
    Keywords: GEOPHYSICS
    Type: Journal of Geophysical Research; 84; Feb. 1
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    NASA TECHNICAL REPORTS
  • 4
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    Electron distribution functions associated with electrostatic emissions in the dayside magnetosphere (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: The analysis deals with electron distribution functions constructed from ISEE-1 dayside observations of low-energy magnetospheric electrons at low latitudes. The discussion covers some examples corresponding to three distinct types of odd half harmonic electrostatic emissions, observed in the plasma wave experiment on ISEE-1, which occur between the electron cyclotron frequency and the upper hybrid frequency.
    Keywords: GEOPHYSICS
    Type: Geophysical Research Letters; 6; Oct. 197
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  • 5
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    A comparison of intense electrostatic waves near f-UHR with linear instability theory (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Intense electrostatic waves near the upper hybrid resonance frequency (f-UHR) have recently been detected near but beyond the plasmapause between + or -50 deg magnetic latitude at all local times. The paper shows that the electrostatic waves observed with the ISEE 1 plasma wave receiver near f-UHR are in qualitative agreement with linear theory of multicyclotron harmonic emissions. The peak amplitudes and bandwidths observed are similar to those calculated for maximum spatial growth rates. Measurements on Hawkeye of similar waves suggest that the electric field polarization is also consistent with theory. For a wide range of plasma parameters, nonconvective instability or large spatial growth rates occur within the cyclotron band encompassing the cold upper hybrid frequency.
    Keywords: GEOPHYSICS
    Type: Geophysical Research Letters; 6; June 197
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  • 6
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    Characteristics of trough region auroral patches and detached arcs observed by Isis 2 (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: All of the data presented in this paper were obtained from the Isis 2 satellite, which was launched into a 1400-km near-circular polar orbit in April 1971. Instruments used in this study include the topside sounder for providing vertical profiles of the electron density, the Langmuir probe for measuring electron temperature and concentration, and the auroral scanning photometer for detecting optical emissions at 5577 A and 3914 A. Two distinct types of auroras (east-west-aligned oval-shaped 'patches', and isolated east-west 'detached arcs') are observed in the trough region (almost exclusively in the Northern Hemisphere) equatorward of the diffuse auroral boundary. Attention is given to comparison of patches and detached arcs, relation to magnetic indices, and relation to detached plasma and ELF hiss.
    Keywords: GEOPHYSICS
    Type: Journal of Geophysical Research; 84; Apr. 1
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  • 7
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    On the nature of human interlimb coordination (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-03-09
    Description: Movement time varies as a function of amplitude and requirements for precision, according to Fitts' law, but when subjects perform two-handed movements to targets of widely disparate difficulty they do so simultaneously. The hand moving to an "easy" target moves more slowly to accommodate its "difficult" counterpart, yet both hands reach peak velocity and acceleration synchronously. This result suggests that the brain produces simultaneity of action not by controlling each limb independently, but by organizing functional groupings of muscles that are constrained to act as a single unit.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kelso, J A -- Southard, D L -- Goodman, D -- New York, N.Y. -- Science. 1979 Mar 9;203(4384):1029-31.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/424729" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Brain/physiology ; Functional Laterality ; Hand/physiology ; Humans ; Motor Skills/*physiology ; *Movement
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 8
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    Hydroxylase cofactor activity in cerebrospinal fluid of normal subjects and patients with Parkinson's disease (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-05-11
    Description: A method for measuring hydroxylase cofactor activity in human cerebrospinal fluid is described. The hydroxylase cofactor content of cerebrsopinal fluid from Parkinsonian patients is approximately 50 percent that of normal subjects. A significant correlation between hydroxylase cofactor and the concentration of homovanillic acid in the cerebrospinal fluid was observed.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lovenberg, W -- Levine, R A -- Robinson, D S -- Ebert, M -- Williams, A C -- Calne, D B -- New York, N.Y. -- Science. 1979 May 11;204(4393):624-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/432666" target="_blank"〉PubMed〈/a〉
    Keywords: Biopterin/analogs & derivatives/analysis/*cerebrospinal fluid ; Homovanillic Acid/cerebrospinal fluid ; Humans ; Methods ; Parkinson Disease/*cerebrospinal fluid ; Pteridines/*cerebrospinal fluid
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 9
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    N-nitrosamines in the rubber and tire industry (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-09-21
    Description: Airborne N-nitrosomorpholine (0 to 27 micrograms per cubic meter) was found in two of four rubber industry factories. N-Nitrosodimethylamine was also found in two factories, but at lower levels. These findings may be relevant to the reported increased risk of certain types of cancer in rubber workers in some of the same areas where the N-nitrosomorpholine levels were highest.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fajen, J M -- Carson, G A -- Rounbehler, D P -- Fan, T Y -- Vita, R -- Goff, U E -- Wolf, M H -- Edwards, G S -- Fine, D H -- Reinhold, V -- Biemann, K -- New York, N.Y. -- Science. 1979 Sep 21;205(4412):1262-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/472741" target="_blank"〉PubMed〈/a〉
    Keywords: Air Pollutants/*analysis ; Air Pollutants, Occupational/*analysis ; Dimethylnitrosamine/analysis ; Environmental Exposure ; Humans ; Morpholines/analysis ; Nitrosamines/*analysis ; *Occupational Medicine ; *Rubber
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 10
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    A systematic assessment of early African hominids (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-01-26
    Description: A large sample of Pliocene fossil hominid remains has been recovered from the African sites of Hadar in Ethiopia and Laetolil in Tanzania. These collections, dating approximately between 2.9 and 3.8 million years ago, constitute the earliest substantial record of the family Hominidae. This article assesses the phylogenetic relationships of the newly discovered fossil hominids and provides a taxonomy consistent with that assessment. A new taxon, Australopithecus afarensis, has been created to accommodate these Pliocene hominid fossils.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Johanson, D C -- White, T D -- New York, N.Y. -- Science. 1979 Jan 26;203(4378):321-30.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/104384" target="_blank"〉PubMed〈/a〉
    Keywords: Africa, Eastern ; Africa, Southern ; Animals ; Biological Evolution ; Craniology ; Dental Arch ; *Fossils ; Haplorhini/*anatomy & histology/classification ; History, Ancient ; Humans ; *Paleodontology ; *Paleontology ; Phylogeny ; Primates/*anatomy & histology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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