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  • Articles: DFG German National Licenses  (2)
  • 1990-1994  (2)
  • C57BL/6JCBA/Ca mice  (1)
  • C, N & P
  • IR
  • multifractals
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  • Articles: DFG German National Licenses  (2)
Material
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Year
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  • 1
    Electronic Resource
    Electronic Resource
    Factors influencing the catalytic activity of titanium silicalites in selective oxidations (1991)
    Springer
    Catalysis letters 8 (1991), S. 237-244 
    Details
    ISSN: 1572-879X
    Keywords: Titanium silicalite ; oxidation catalyst ; hydrogen peroxide adsorption ; IR ; DRS
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Titanium silicalites synthesized via different procedures are tested in the oxidation of phenol, l-octene and n-hexane by aqueous H2O2. It is shown that the presence of titanyl groups, on which H2O2 is activated by formation of titanium peroxo complexes, is a prerequisite for oxygenation activity. Furthermore, in order to afford high selectivities, titanium silicalites should be free of impurities which cause acid catalyzed side reactions or H2O2 decomposition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00764122
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Inner ear morphology in CBA/Ca and C57BL/6J mice in relationship to noise, age and phenotype (1993)
    Springer
    European archives of oto-rhino-laryngology and head & neck 250 (1993), S. 257-264 
    Details
    ISSN: 1434-4726
    Keywords: Genotype ; Acoustic trauma ; Sound threshold shifts ; Cochlear morphology ; C57BL/6JCBA/Ca mice
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary CBA/Ca mice showing moderate hearing losses with onset late in life and C57BL/6J mice with progressive hearing losses starting when animals were young adults were exposed to a 2–7 kHz, 120 dB SPL noise band for 5 min in order to investigate morphological consequences to noise as a function of age and genotype. Permanent threshold shifts were determined by auditory brainstem responses 1 month after noise exposure at 1, 3 and 6 months of age. CBA mice had a decreasing susceptibility to noise with increasing age, while C57 mice remained equally susceptible throughout all ages tested. The threshold shifts were then analyzed in relation to morphological changes of the organ of Corti as visualized by light microscopy (LM), transmission electron microscopy (TEM) and scanning electron microscopy (SEM). CBA mice exposed at 1 month and sacrificed at 2 months had seemingly normal cochlear morphologies under LM. In these animals SEM findings demonstrated mild stereocilia damage to noise trauma, but not when mice were exposed at 3 and 6 months. There was no visible morphological aging of hair cells found during the period tested. In contrast; the C57 mice had early hair cell changes including bent and fused stereocilia, bulging of the cuticular plates, hair cell loss and swelling of afferent dendrites. These changes became more pronounced throughout the test periods with the variability of damage in this strain more evident over time. This pattern was also aggravated in all C57 age groups tested after noise exposure. Quantification with cytocochleograms demonstrated a statistically different reaction pattern to noise trauma between the two different genotypes of mice.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00186222
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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