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  • 2000-2004  (3)
  • 1955-1959  (1)
  • 1
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 90 (2001), S. 5343-5350 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We report on the temperature dependence of various photovoltaic device parameters of solar cells, fabricated from interpenetrating networks of conjugated polymers with fullerenes, in the wide temperature range of their possible operating conditions (25–60 °C). The open-circuit voltage was found to decrease linearly with increasing temperature. For the short-circuit current, we observed a monotonic increase with increasing temperature, followed by a saturation region. The rate of this increase (coupled to a corresponding increase for the fill factor) was found to overtake the corresponding rate of decrease in voltage, resulting in an overall increase of the energy conversion efficiency. The efficiency was observed to reach a maximum value in the approximate range 47–60 °C. The results are discussed with respect to possible mechanisms for photovoltage generation and charge carrier transport in the conjugated polymer-fullerene composite, and in particular, thermally activated charge carrier mobility. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of the American Chemical Society 80 (1958), S. 6695-6696 
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of communication 50 (2000), S. 0 
    ISSN: 1460-2466
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Media Resources and Communication Sciences, Journalism
    Notes: For some theorists, talk about politics is infrequent, difficult, divisive, and, to be efficacious, must proceed according to special rules in protected spaces. We, however, examined ordinary political conversation in common spaces, asking Americans how freely and how often they talked about 9 political and personal topics at home, work, civic organizations, and elsewhere. Respondents felt free to talk about all topics. Most topics were talked about most frequently at home and at work, suggesting that the electronic cottage is wired to the public sphere. Political conversation in most loci correlated significantly with opinion quality and political participation, indicating that such conversation is a vital component of actual democratic practice, despite the emphasis given to argumentation and formal deliberation by some normative theorists.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Psychopharmacology 149 (2000), S. 153-162 
    ISSN: 1432-2072
    Keywords: Key words Cocaethylene ; Cocaine ; Alcohol ; Pharmacokinetic ; Human subject
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  Rationale: Cocaethylene is a pharmacologically active homolog and metabolite of cocaine, formed by transesterification of cocaine in the presence of ethanol. Here we relate findings from a randomized, placebo-controlled, double-blind study in which we examined the physiological and subjective effects and pharmacokinetics of IV administered cocaethylene in human volunteers using cocaine as a comparator. Methods: Cocaine-dependent participants randomly received one study drug, cocaethylene (0.25 or 0.5 mg/kg), cocaine (0.25 or 0.5 mg/kg), or placebo, during each experimental session which occurred on separate days. Results: Cocaethylene was less potent in elevating heart rate than equivalent doses of cocaine. Similar differences between cocaine and cocaethylene were found for subjective measures (”Cocaine High”, ”Rush”, ”Stimulated” and ”Good Drug Effects”). All active drug conditions produced significant increases in systolic blood pressure relative to placebo, but no significant effect on diastolic blood pressure was observed. Cocaethylene demonstrated a slower clearance, larger volume of distribution and correspondingly longer elimination half-life than cocaine. Conclusion: The findings from this study confirm those of previous studies that show that cocaethylene has pharmacological properties in common with cocaine, but is less potent.
    Type of Medium: Electronic Resource
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