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  • Articles: DFG German National Licenses  (4)
  • 1990-1994  (4)
  • Allen paradox  (1)
  • China  (1)
  • Discriminative stimulus  (1)
  • Electron-beam lighography  (1)
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  • Articles: DFG German National Licenses  (4)
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Year
Keywords
  • 1
    ISSN: 1432-2072
    Keywords: Discriminative stimulus ; Catalepsy ; Marijuana ; Δ9-Tetrahydrocannabinol ; Opiate ; Neuroleptic ; Rats
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The cataleptogenic effect of Δ9-THC was compared to its discriminative stimulus effects in rats. The ED50s for the discriminative stimulus and catalepsy were 0.8 and 4.0 mg/kg, respectively, while their time courses were very similar. The ED50 of Δ9-THC for catalepsy in experimentally naive rats was not different from that in rats trained with the drug discrimination procedure, indicating that the cataleptogenic effect was not appreciably attenuated by long-term exposure to low doses of Δ9-THC. Pharmacologically, the catalepsy produced by Δ9-THC more closely resembled that of haloperidol than of morphine, since anticholinergic pretreatment eliminated the Δ9-THC-induced catalepsy while pre-treatment with naloxone had no effect. Although the cataleptogenic effect of Δ9-THC could be pharmacologically manipulated by anticholinergic pre-treatment, its discriminative stimulus effects were not changed in the same animals. These results demonstrate that distinctive mechanisms of action exist for these cannabinoid-induced behaviors.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Environmental management 18 (1994), S. 889-899 
    ISSN: 1432-1009
    Keywords: China ; Glass ; Hard plastic ; Paper ; Polystyrene foam cups
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract A group of five different types of reusable and disposable hot drink cups have been analyzed in detail with respect to their overall energy costs during fabrication and use. Electricity generating methods and efficiencies have been found to be key factors in the primary energy consumption for the washing of reusable cups and a less important factor in cup fabrication. In Canada or the United States, over 500 or more use cycles, reusable cups are found to have about the same or slightly more energy consumption, use for use, as moulded polystyrene foam cups used once and then discarded. For the same area paper cups used once and discarded are found to consume less fossil fuel energy per use than any of the other cup types examined. Details of this analysis, which could facilitate the comparative assessment of other scenarios, are presented.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Aquatic ecology 26 (1992), S. 471-476 
    ISSN: 1573-5125
    Keywords: chironomids ; secondary production ; Allen paradox ; streams
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Chironomid secondary production was estimated on a species-specific basis for 14 dominant taxa in a third-order woodland stream. Results from this study were used to provide an expalanation for the common observation that benthos secondary production in streams is insufficient to account for levels of fish production,i.e., the ALLEN paradox. Annual chironomid secondary production was 29.7 g dry mass m−2 and accounted for 80% of the total aquatic insect secondary production. A contribution by chironomids this high has not been reported previously from similar streams and indicates that chironomids are an energetically important group available for fish consumption. Most studies examining chironomid secondary production group all taxa at the family level and calculate secondary production for the entire family using the size-frequency method. This approach violates assumptions of the size-frequency method and will result in inaccurate and unpredictable estimates of chironomid secondary production. The species-specific approach to estimate chironomid production used in this study, combined with non-chironomid production, yielded a benthos annual production rate that exceeded consumption necessary to support fish production.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Advanced Materials for Optics and Electronics 4 (1994), S. 55-74 
    ISSN: 1057-9257
    Keywords: Microlithography ; X-ray lithography ; Electron-beam lighography ; Photolithography lon-beam lithography ; Resists ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Additional Material: 24 Ill.
    Type of Medium: Electronic Resource
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