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  • 1
    Electronic Resource
    Electronic Resource
    Influence of climate on the radioactivity of lake and sea sediments: first results (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical journal international 116 (1994), S. 0 
    Details
    ISSN: 1365-246X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: Low-level nuclear counting has been carried out on sediment cores from Lake Bouchet in France and from the Black Sea. The cores span the past 20 Ka. The variation of α and β particle counting rates with core depth, i.e. with time, shows features which can reasonably be associated with climatic change. The discussion is augmented by some high resolution γ ray spectrometry measurements of the specific activity of particular component radionuclides (214Pb, 212Pb and 40K) in the Black Sea cores.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-246X.1994.tb03290.x
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  • 2
    Electronic Resource
    Electronic Resource
    Periodic variation in natural radioactivity of lake Bouchet sediments (1992)
    Springer
    Earth, moon and planets 59 (1992), S. 191-200 
    Details
    ISSN: 1573-0794
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Low level counting of alpha and beta particles has been carried out on a 5 long sediment core from the lake La Bouchet in France, spanning the past around 24 000 years. A total of around 60 data points were spectrally analysed with the successive approximations method. Several whole or quasi-periodicities were located for the two radioactivity data sets, in different time intervals; for the alpha counting, periods of 1000–1200, 2000, 6000 and 24 000 years and for the beta counting periods of 1000, 3000, 4000, 8000 and 24 000 years were obtained. The non-stationarity nature of the obtained periods are discussed in relation to (a) palaeoclimatic fluctuations impact on mineral carrying natural radiosotopes partitioning of the sediment deposition of the last glacial and (b) other solar-terrestrial agents.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00054051
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Eimeria tenella: Inhibition of development in cell culture by serum from chickens fed anticoccidial drugs (1977)
    Springer
    Parasitology research 54 (1977), S. 95-100 
    Details
    ISSN: 1432-1955
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Sera from chickens fed commercially available anticoccidial drugs were added to cultures of chick kidney cells at the rate of 1.5–10% of the culture medium at the time of inoculation with sporozoites of Eimeria tenella. Inhibitory activity was detected in sera from birds fed decoquinate (15–60 ppm) and robenidine (60 ppm) added at the rate of 5–10% of the culture medium. Sera from birds fed clopidol (125 ppm) or monensin (121 ppm) did not inhibit formation of second generation schizonts. Withdrawal of decoquinate medication from chickens was accompanied by a loss of activity in serum within 48 h. Reduction in robenidine concentration from 60 to 30 ppm in feed was also accompanied by loss of activity in serum. Sera from non-medicated chickens had no inhibitory effects; they were comparable to fetal calf sera in supporting parasite development.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00380642
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Bremsstrahlung from a shielded beta irradiator (1990)
    Springer
    Journal of radioanalytical and nuclear chemistry 146 (1990), S. 333-345 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract A beta irradiation unit is described which contains a 4 GBq90Sr source. The shielding, comprising perspex, aluminium and lead is designed to provide an acceptably low doserate to the user without exceeding a manageable mass as it is necessary to move the shielded source while in use for thermoluminescence dating. The cylindrical shield is 192 mm in diameter and 192 mm high and has a mass of 33 kg. Measurmeents of bremsstrahlung spectra from the system are reported and interesting features noted. A comparison of the bremsstrahlung dose-rates as determined by three different portable dose-rate monitors is also presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02164236
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  • 5
    Electronic Resource
    Electronic Resource
    Thermoluminescence dating of ceramics revisited: Optical stimulated luminescence of quartz single aliquot with green light-emitting diodes (1994)
    Springer
    Journal of radioanalytical and nuclear chemistry 188 (1994), S. 189-198 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Two archeological ceramic sherds in a single quartz aliquot form have been dated success-fully for the first time, by the newly developed method of optical stimulated luminescence (OSL) with green light-emitting diodes (LED). Comparison with the conventional thermoluminescence (TL) method provided ages of the same order of magnitude. The ceramics come from two recently excavated sites at “Hellenikon” and “Ligourio” in Argolid, Peloponnese, Greece. One sherd dates from the end of 4th millenium B.C., while the other is classified around 7th c. B.C.. The new method of nuclear dating is described in the paper and appropriately evaluated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02164592
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  • 6
    Electronic Resource
    Electronic Resource
    Dating implications from solar bleaching of thermoluminescence of ancient marble (1999)
    Springer
    Journal of radioanalytical and nuclear chemistry 241 (1999), S. 361-368 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract We present measurements of Thermoluminescence (TL) from Greek marble quarried at Paros, Naxos, Pendeli, Hymitos, Thassos, which have been known since ancient times. The results concern i) the solar bleaching of TL, ii) the solar transmission through marble thicknesses up to 16 mm, and iii) the implications for potential dating of ancient carved marble monuments/objects. The bleaching rate for marbles is very fast during the first hour of exposure. The solar penetration is at least 35 mm for long exposures. Beyond the 2 mm marble slab for exposure times 90–120 hours of sunshine, the residual bleached TL level is not reached. The bleached TL reaches a plateau which serves as the “zero time” upon which the archaeological TL dose subsequently builds up and gives the age of a marble monument.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02347476
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