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  • 1
    Electronic Resource
    Electronic Resource
    Trace elements in the flesh and liver of two fish species from polluted and unpolluted areas of the Aegean Sea (1978)
    s.l. : American Chemical Society
    Environmental science & technology 12 (1978), S. 723-726 
    Details
    ISSN: 1520-5851
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/es60142a001
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  • 2
    Electronic Resource
    Electronic Resource
    Bottom sediments in a polluted marine environment, upper Saronikos Gulf, Greece (1978)
    Springer
    Environmental geology 2 (1978), S. 97-106 
    Details
    ISSN: 1432-0495
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract The domestic and industrial waste water from most of the greater Athens, Greece area is discharged into shallow water at the upper end of the semi-enclosed Saronikos Gulf. The lack of circulation and excess organic matter has led to the formation of a rapidly expanding sludge field. Black anoxic sediments high in organic carbon now cover almost 9 sq km of sea floor and contain high concentrations of heavy metals. Maximum increases above background values range from 22× for mercury, 1500× for arsenic, 1200× for chromium, to 3000× for zinc. The principal sources of metals are 1) a fertilizer factory, 2) the Athens sewer outfall, and 3) the industries in eastern Elefsis Bay.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02380472
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  • 3
    Electronic Resource
    Electronic Resource
    High power, 0.98 μm, Ga0.8In0.2As/GaAs/Ga0.51In0.49P multiple quantum well laser (1992)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 72 (1992), S. 4447-4448 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We report the fabrication of high quality Ga0.8In0.2As/GaAs/Ga0.51In0.49P multiple quantum well laser emitting at 0.98 μm grown by low pressure metalorganic chemical vapor deposition. Continuous wave operation with output power of 500 mW per facet was achieved at room temperature for a broad area laser with 130 μm width and 300 μm cavity length. This is an unusually high value of output power for this wavelength laser in this material system. The differential quantum efficiency exceeded 75% with excellent homogeneity and uniformity. The characteristic temperature, T0 was in the range of 120–130 K.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.352212
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  • 4
    Electronic Resource
    Electronic Resource
    Longitudinal asymmetries of the coronal line intensities
    Amsterdam : Elsevier
    Advances in Space Research 11 (1991), S. 169-172 
    Details
    ISSN: 0273-1177
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0273-1177(91)90108-V
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  • 5
    Electronic Resource
    Electronic Resource
    Determination of rare earth elements in sediment cores from Northern Saronikos Gulf, Greece, by instrumental neutron activation analysis (1987)
    Springer
    Journal of radioanalytical and nuclear chemistry 114 (1987), S. 45-55 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Instrumental Neutron Activation Analysis (INAA) has been applied for the determination of 8 rare earth elements (REE) in sediment cores collected from stations of polluted and unpolluted areas of Northern Saronikos Gulf. The REE determined in cores are: La, Ce, Sm, Eu, Tb, Dy, Yb and Lu. Higher levels of all REE were found in the cores from polluted areas of N. Saronikos Gulf as compared with those from unpolluted areas. Different vertical profiles of REE were found in the cores from two stations of polluted areas which indicate that REE may distinguish pollution sources.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02048874
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  • 6
    Electronic Resource
    Electronic Resource
    Comparison between two INAA methods applied to chemical characterization of ancient ceramics (1991)
    Springer
    Journal of radioanalytical and nuclear chemistry 152 (1991), S. 469-477 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Two different instrumental neutron activation analysis (INAA) methods were applied to characterize chemically 74 ceramic roof tile samples, found in the town of Pella, Greece and dated back to the Hellenistic Period (3rd century B. C.). The samples were first analyzed for 17 elements with a 4 hour irradiation and two counts and then re-analyzed for 9 elements with a 1 minute irradiation and two counts of short-lived radioisotopes. The results of both methods were very similar, showing the validity of the rapid INAA method (1 min irradiation) in the study of ancient ceramics. All samples were divided into 4 chemical groups, each one representing a different tiling.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02104699
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  • 7
    Electronic Resource
    Electronic Resource
    Fast Plasma Streams Recorded Near the Earth During 1985–1996 (1998)
    Springer
    Solar physics 183 (1998), S. 181-200 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A reference catalogue of 373 well-defined high-speed plasma streams identified in the solar wind measurements from 1985 to 1996 is reported. The data base for this study is the interplanetary plasma/magnetic field data compilation made available by the NSSDC/WDC-A for rockets and satellites (NASA/GSFC-Greenbelt). The main characteristics of those streams, such as the beginning time, the duration, the origin of them (corotating or flare-generated), the interplanetary magnetic field polarity (Stanford magnetic field), are given in the catalogue. The long-term variation in the occurrence rate of high-speed streams shows interesting differences between even and odd solar cycles when catalogues for solar cycles 20, 21, and 22 are considered together. Hence, this catalogue, extended now over three solar cycles, should be useful for studies connected with solar-interplanetary or solar-terrestrial phenomena, and to clarify solar activity in time.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1005004328071
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  • 8
    Electronic Resource
    Electronic Resource
    A catalogue of high-speed solar-wind streams: Further evidence of their relationship to Ap-index (1988)
    Springer
    Solar physics 115 (1988), S. 345-365 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A reference catalogue of 430 well-defined high-speed plasma streams detected in solar-wind observations from 1972 to 1984 is presented. We have given the main characteristics of the streams as the beginning time and the duration of the stream, the interplanetary magnetic field polarity, etc. We have also separated them with respect to their origin into two categories: the corotating and the flare-generated streams. As a first application of this useful catalogue, a correlative study between the maximum speed of streams and the A p -index of geomagnetic activity is carried out.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00148733
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  • 9
    Electronic Resource
    Electronic Resource
    Sector-structured interplanetary magnetic field associated with the fast plasma streams in 1985–1996 (1999)
    Springer
    Solar physics 189 (1999), S. 199-216 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract An analysis of 373 well-defined high-speed solar-wind streams observed at 1 AU during the years 1985 –1996 is outlined. The distribution of the occurrence of these streams as a function of Bartels rotation days using the dominant polarity of the interplanetary magnetic field (IMF) associated with the referred fast streams shows that a four-sector pattern for the positive IMF polarity and a two-sector pattern for the negative IMF polarity are the dominant features in the investigated period. The high-speed streams seem to occur at preferred Bartels days: positive polarity streams are most frequent near Bartels days 5 and 18, while negative polarity streams are most frequent in days 14 and 23. Moreover, the corotating streams with positive IMF polarity prefer to occur in days 5 and 18 of the Bartels rotation period, whereas flare-generated streams with negative IMF polarity occur in days 14 and 23. The observed distribution of Bartels days is probably related to the distribution of the solar sources of high-speed solar wind streams as the solar wind carries with it the photospheric magnetic polarity of the solar source region. In addition, the distribution of the streams reveals a similar behaviour during the ascending and the declining phase of the last solar cycle (22nd) in contrast to the previous one where it has an opposite appearance. Determined differences in the characteristics of the sector structured IMF associated with the fast streams of the last cycle with the previous one (21st) and some similarities with the alternate solar cycle (20th) seem to be attributed to the 22-year magnetic cycle and to the polarity reversals of the polar magnetic field of the Sun. As the magnetic sectors are due to multiple crossings of the solar equatorial plane by a large-scale, warped heliospheric current sheet, it is suggested that the two-sector pattern arises from a tilted solar magnetic dipole component and the more commonly observed four-sector pattern from a quadrupole component of the solar interplanetary magnetic field.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1005294103370
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  • 10
    Electronic Resource
    Electronic Resource
    Solar-cycle phenomena in cosmic-ray intensity: Differences between even and odd cycles (1988)
    Springer
    Earth, moon and planets 42 (1988), S. 233-244 
    Details
    ISSN: 1573-0794
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Cosmic-ray intensity data for the period 1964–1985 covering two solar cycles are used to investigate the solar activity behaviour in relation to cosmic-ray modulation. A detailed statistical analysis of them shows a large time-lag of about one and half years between cosmic-ray intensity and solar activity (as indicated by sunspot number, solar flares and high-speed solar-wind streams) during the 21st solar cycle appearing for a first time. This lag indicates the very high activity level of this solar cycle estimating the size of the modulating region to the unambiguous value of 180 AU. The account of the solar-wind speed in the 11-year variation significantly decreases the modulation region of cosmic-rays to the value of 40 AU. A comparison with the behaviour of the previous solar cycle establishes a distinction between even and odd solar cycles. This is explained in terms of different contributions of drift, convection and diffusion to the whole modulation mechanism during even and odd solar cycles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00058488
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