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  • 1975-1979  (5)
  • 1
    Electronic Resource
    Electronic Resource
    The maternal distribution and placental transfer of cadmium in zinc deficient rats (1978)
    Springer
    Bulletin of environmental contamination and toxicology 19 (1978), S. 556-563 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Notes: Summary Although a transitory maternal zinc deficiency has been shown to result in an increased cadmium-induced fetotoxicity, the results of the present investigation indicated that a maternal zinc deficiency apparently did not affect the placental transfer of cadmium. However, a zinc deficiency did alter the maternal distribution of cadmium. The increased cadmium fetotoxicity associated with a maternal zinc deficiency may be caused by a maternal alteration rather than a direct effect on the fetus. Further study is necessary prior to any definitive statement concerning the effects of a maternal zinc deficiency on cadmium. fetotoxicity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01685841
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Fetal effects of cadmium in pregnant rats on normal and zinc deficient diets (1978)
    Springer
    Bulletin of environmental contamination and toxicology 19 (1978), S. 206-214 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Notes: Summary This investigation has shown that not only the extent of fetal resorption and malformation but also the types of malformation seen in rats depend upon the strain used and day of gestation. Furthermore, the effects of zinc deficiency and cadmium administration on the fetus can be at least additive, as was seen for malformations. For fetal resorption, zinc deficiency potentiated the action of cadmium.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01685788
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Uptake and distribution of cadmium in mice following repeated administrations (1977)
    Springer
    Archives of environmental contamination and toxicology 6 (1977), S. 63-68 
    Details
    ISSN: 1432-0703
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Notes: Abstract The research was undertaken to analyze the uptake and distribution of cadmium-109 in mice following repeated injections and to observe how the simultaneous administrations of zinc affected the cadmium retention. Mice were given one, two, or three intravenous administrations at 48-hr intervals. Animals were sacrificed 2 min to 48 hr after each injection. Zinc had little effect on the retention of cadmium in the samples analyzed, and injections behaved independently of each other.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02097750
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Collisional effects upon optical coherences: Experimental study in a xenon three-level system (1979)
    Springer
    Applied physics 20 (1979), S. 83-88 
    Details
    ISSN: 1432-0630
    Keywords: 32 ; 34 ; 42.55
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Laser induced nonlinear absorption profiles in a three-level system have been recorded to study the effect of elastic collisions upon optical coherences. In our particular system, the signal is due to a pure double-quantum term, where we have separated the effect of phase-interrupting collisions from the effect of velocity-changing collisions. Experimental results show that the effect of velocity-changing collisions is very small, and that broadening of the signal is due to phase-interrupting collisions mainly. We are able to determine the increase of the decay rate of the coherent superposition (the “coherence”) of two levels of same parity [Dγ 13/dp=(6.5±1) MHz/Torr] and an upper limit for the mean velocity change (ũ≲5m/s).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00901791
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    The uptake of Manganese-54 by green algae (Protococcoidal chlorella), Daphnia magna, and fathead minnows (Pimephales promelas) (1978)
    Springer
    Hydrobiologia 59 (1978), S. 181-185 
    Details
    ISSN: 1573-5117
    Keywords: Manganese-54 ; concentration factor ; algae ; Daphnia ; minnows
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Concentration factors (CF) of 54Mn for three aquatic species: green algae (Protococcoidal chlorella), Daphnia magna, and fathead minnows (Pimephales promelas) were determined following direct exposure to the isotope in solution. The maximum accumulation (CF = 911) in P. chlorella was reached at 48 hours of exposure; the maximum uptake (CF = 65) in Daphnia was reached at 8 hours of exposure; and the maximum accumulation (CF = 22.6) in fathead minnows was at 128 hours of exposure. The data indicate that 54Mn accumulation decreases with ascent up a theoretical aquatic food chain when water is the only source of contamination.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00036496
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    Paper (German National Licenses)
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