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  • 1995-1999  (4)
  • 1965-1969
  • 1996  (4)
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  • 1995-1999  (4)
  • 1965-1969
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  • 1
    Electronic Resource
    Electronic Resource
    Radiative cooling of fullerenes (1996)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 104 (1996), S. 5012-5018 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We have measured the metastable fragmentation of fullerene ions in molecular beams. The rates are significantly smaller than the evaporative ensemble prediction, consistent with an alternative cooling mechanism through emission of electromagnetic radiation. Modeling the competition between radiative and evaporative cooling yields information about the evaporative activation energy and emissivity of the carbon clusters. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.471130
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Icosahedra of icosahedra: The stability of (C60)13 (1996)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 105 (1996), S. 6088-6089 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The relative stability of clusters of fullerenes has been investigated. By heating the clusters before ionization we have obtained mass spectra where only the monomer and (C60)13 are present in significant amounts. An approximately 20% increase of the activation energy for evaporation of a monomer from (C60)13 compared to that from (C60)14 explains the experimental results. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.472448
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Optical and chemical stimuli control pollen feeding in the hoverfly Eristalis tenax (1996)
    Springer
    Entomologia experimentalis et applicata 80 (1996), S. 50-53 
    Details
    ISSN: 1570-7458
    Keywords: Diptera ; Syrphidae ; colour vision ; pollen surface ; contact chemoreception
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00194723
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    On-line membrane inlet mass spectrometry for feed-back control of precursor concentration in penicillin fermentation (1996)
    Springer
    Biotechnology techniques 10 (1996), S. 485-490 
    Details
    ISSN: 1573-6784
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary A sampling system which enables on-line measurements of the precursor phenoxyacetic acid (POAA) in penicillin fermentation by membrane inlet mass spectrometry is presented and its capacity for feed-back regulation of POAA to a low predefined concentration in a penicillin-V fermentation over 150 hours is demonstrated. The system measures alternately filtered sample and standard solution in a measuring cycle which is shorter than the response time of membrane inlet mass spectrometry (MIMS) but sufficiently long to decide whether the concentration of POAA in the sample is higher or lower than in the standard solution at set point concentration. The decision is used for on-off regulation of the addition of POAA.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00159511
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    Paper (German National Licenses)
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