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  • 1995-1999  (2)
  • Aging effects  (1)
  • Composite polymer particle  (1)
  • Eighth nerve compound action potential  (1)
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Material
Years
  • 1995-1999  (2)
Year
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Formation mechanism of anomalous “golf ball-like” composite polymer particles by seeded emulsion polymerization (1996)
    Springer
    Colloid & polymer science 274 (1996), S. 520-524 
    Details
    ISSN: 1435-1536
    Keywords: Composite polymer particle ; emulsion polymerization ; morphology ; anomalous shape ; phase separation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Recently, the authors found that anomalous polystyrene/polybutyl acrylate composite particles, whose surfaces had many dents, were produced by emulsifier-free seeded emulsion polymerization of butyl acrylate with polystyrene seed particles. Such a particle was named a “golf ball-like” particle. In this article, the morphology and the formation mechanism of the golf ball-like composite polymer particles were studied.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00655226
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 2
    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
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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