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  • 1990-1994  (2)
  • 1980-1984
  • 1930-1934
  • 1992  (2)
  • ZSM-5  (1)
  • aging  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Catalysis letters 16 (1992), S. 263-268 
    ISSN: 1572-879X
    Keywords: Methane ; partial oxidation ; additive ; natural gas ; ZSM-5
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Previously, it was reported that the direct partial oxidation (DPO) of CH4 with O2 over HZSM-5 catalysts produces C5+ hydrocarbon liquids when the feed contains a propane or propene additive. This work studies additive effects on C5+ production in this system by processing a CH4/C3H8 feed with subsequent removal of the C3 additive and by processing natural gas feed. Results show C5+ production is maintained at constant yields for HZSM-5 catalysts having different zeolitic Al contents after removal of the C3 additive. Mechanistic implications are discussed. Natural gas DPO consistently produced C5+ liquids due to the presence of C2+ components in the feed. While C5+ yields from natural gas DPO are higher than those observed for CH4/C3 feeds, increasing feed O2 concentration, and thus conversion, deleteriously affected C5+ selectivity.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of cross-cultural gerontology 7 (1992), S. 69-88 
    ISSN: 1573-0719
    Keywords: aging ; cross-cultural ; migration ; modernization ; Polynesia ; Samoa ; status
    Source: Springer Online Journal Archives 1860-2000
    Topics: Ethnic Sciences , Sociology
    Notes: Abstract Samoan cultural values place a high emphasis on respect and obedience toward elders. However, modernization and migration have caused changes in traditional social structure, social organization, household composition, economic opportunities, and health care systems. This article reports results from interviews on attitudes and perceptions of the elderly administered to 137 young adults (aged 18–37) and 106 older adults (aged 41–82) in rural Western Samoa, modernizing American Samoa, and Samoan migrants in urban Honolulu. The results indicate there are significant signs of both change and stability in the status of elderly Samoans. Over 75% of Samoans report that the elderly are respected, obeyed, and consulted on important decisions. However, Samoans in American Samoa and Honolulu report that the status of the elderly has declined over the past ten years. Older Samoans in Honolulu emphasize the maintenance of traditional norms rather than changes in the behavior toward the elderly.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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