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  • Articles: DFG German National Licenses  (3)
  • glucose  (2)
  • Carbon dioxide  (1)
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  • Articles: DFG German National Licenses  (3)
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  • 1
    Electronic Resource
    Electronic Resource
    The catalytic activity of Ru and Ir supported on Eu2O3 for the reaction, CO2 + CH4 ⇄ 2 H2 + 2 CO: a viable solar-thermal energy system (1991)
    Springer
    Catalysis letters 11 (1991), S. 219-225 
    Details
    ISSN: 1572-879X
    Keywords: Carbon dioxide ; methane ; ‘syn gas’ ; ruthenium ; iridium ; europium oxide ; supported noble metals ; solar energy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Methane and carbon dioxide which often co-exist in nature, constitute valuable potential resources both for the storage of solar (thermal) energy and the convenient production of synthesis gas. Ru and Ir supported on Eu2O3 are effective catalysts for the reforming of methane with carbon dioxide to produce synthesis gas with no significant coke formation even after prolonged activity. Ru catalysts show onset of activity around 673 K reaching a maximum at about 973 K. Loadings as low as 1% by weight of Ru are highly effective. Ir catalysts show onset around 823 K reaching a maximum conversion in excess of 94% with respect to CO2 at 1023 K for a 1% loading of the metal. X-ray absorption studies on the spent Ru/Eu2O3 catalysts indicate the presence of the reduced metal, primarily in the form of large spherical particles (〉 30 Å) of hexagonal structure. 5% Ir supported on Eu2O2 was found to transform an equimolar mixture of H2 and CO to methane and carbon dioxide with a 42% conversion with respect to H2 at around 848 K and atmospheric pressure. A 5% loading of Ru on Eu2O3 produced a 14% conversion with respect to H2 at 973 K under similar conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00764088
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    The pattern of basal and stimulated insulin responses to intravenous glucose in first degree relatives of Type 1 (insulin-dependent) diabetic children and unrelated adults aged 5 to 50 years (1988)
    Springer
    Diabetologia 31 (1988), S. 430-434 
    Details
    ISSN: 1432-0428
    Keywords: Insulin ; glucose ; age ; children ; puberty
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The pattern of insulin secretion was studied in 107 normal individuals aged 5 to 50 years. Intravenous glucose tolerance tests were performed on 64 islet-cell antibody negative siblings of diabetic children and on 43 normal adults. Puberty was staged using Tanner's criteria and subjects were grouped as follows: I — stage 1 (n=22), II — stages 2 and 3 (n=18), III — stages 4 and 5 (n=20), IV — adults 〉17 years (n=47). Basal and stimulated (incremental 0–10 and 10–60 min areas) insulin responses rose throughout puberty (Groups I–III), declined following puberty until the third decade (Groups III and IV) and then appeared constant thereafter. Insulin levels in the 17.6–22.5 year group were lower than in the 12.6–15 year group (p〈0.01). Fasting insulin to glucose ratios and incremental 0–60 min insulin to glucose area ratios produced a similar age-related pattern indicating that changes in insulin levels were independent of glucose concentrations. Gender did not affect these changes and multiple regression analysis showed that HLA haplotype sharing did not influence insulin responses in siblings of diabetic patients. Age and pubertal status must be carefully considered when interpreting intravenous glucose tolerance tests from patients suspected of having early abnormalities of carbohydrate metabolism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00271587
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Between and within subject variation of the first phase insulin response to intravenous glucose (1988)
    Springer
    Diabetologia 31 (1988), S. 123-125 
    Details
    ISSN: 1432-0428
    Keywords: Variability ; insulin ; glucose
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Eight normal subjects underwent two intravenous glucose tolerance tests to determine the between and within subject variation of the first phase insulin response. Variability was represented by the coefficient of variation. The between subject variation for the incremental 0–10 min insulin area was 58%, and the within subject variation was 22% (median value), range 3–55%. The variation of the first phase response expressed in four different ways was compared. The total and incremental (above fasting levels) 0–10 min areas provided less variable results (variation 52 and 58%) than the 1+3 min insulin levels (variation 72%) or mean of the incremental 3–5 min insulin levels (variation 66%). The ratio of the incremental 0–10 min insulin to glucose areas was as variable (variation 53%) as the insulin responses alone. The variability of insulin responses to intravenous glucose severely limits their value as early predictors of B-cell failure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00395560
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    Paper (German National Licenses)
    Fulltext
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