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  • 1
    Electronic Resource
    Electronic Resource
    Age-related changes in the compound action potentials of the eighth nerve in guinea pigs (1997)
    Springer
    European archives of oto-rhino-laryngology and head & neck 254 (1997), S. 145-149 
    Details
    ISSN: 1434-4726
    Keywords: Eighth nerve compound action potential ; Aging effects ; Guinea pig
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The eighth nerve compound action potential (CAP) in 95 guinea pigs was measured using click stimuli to investigate age-related changes in their neural auditory thresholds. The animals were separated into three groups: group A (n = 43, 86 ears; 2–4 months old); group B (n = 29; 58 ears, 13–15 months old); and group C (n = 23; 46 ears, 23–25 months old). With increasing age, a gradual elevation of CAP thresholds was clearly seen among the three groups. The negative peak (N1) latencies of the CAP were prolonged, and the N1 amplitudes of the CAP decreased. There were significant differences in N1 latencies among the three groups and in N1 amplitudes between groups A and B, and between groups A and C. However, the rate of decline of the thresholds as well as the input-output function curves of the CAP varied in some of the oldest animals, suggesting that there were some individual differences in degenerative aging processes of the auditory system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02471279
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  • 2
    Electronic Resource
    Electronic Resource
    Simultaneous determination of chlorine and oxygen evolving at RuO2/Ti and RuO2–TiO2/Ti anodes by differential electrochemical mass spectroscopy (1998)
    Springer
    Journal of applied electrochemistry 28 (1998), S. 511-516 
    Details
    ISSN: 1572-8838
    Keywords: ruthenium oxide ; titanium oxide ; chlorine ; oxygen ; DEMS ; porous electrode
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract Chlorine and oxygen evolving at RuO2/Ti and RuO2–TiO2/Ti anodes have been simultaneously determined at electrode potentials from 1.0 to about 2V (vs Ag/AgCl) by differential electrochemical mass spectroscopy (DEMS). On the RuO2/Ti anodes, the threshold electrode potential for oxygen evolution increased with a decrease in RuO2 loading, while the chlorine evolution potential was unchanged. Low RuO2 loading anodes gave a high chlorine evolution ratio under various constant electrolysis potentials. On the RuO2–TiO2/Ti anodes, the threshold electrode potential for oxygen evolution increased with an increase in the TiO2 content more remarkably than that for chlorine evolution. High TiO2 content anodes gave a high chlorine evolution ratio at various constant electrolysis potentials. The combination of RuO2 and TiO2 exhibits a remarkable effect with respect to the enhancement of chlorine evolution selectivity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003269228566
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    Paper (German National Licenses)
    Fulltext
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