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  • PACS. 41.60.Cr Free-electron lasers[:AND:] 42.60.Fc Modulation, tuning, and mode locking  (1)
  • Saccharomyces cerevisiae  (1)
  • Springer  (2)
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  • Springer  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Two-colour operation of a Free-Electron Laser and applications in the mid-infrared (1998)
    Springer
    The European physical journal 3 (1998), S. 87-93 
    Details
    ISSN: 1434-6079
    Keywords: PACS. 41.60.Cr Free-electron lasers[:AND:] 42.60.Fc Modulation, tuning, and mode locking
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: The two-colour operation of a Free-Electron Laser (FEL) has been demonstrated with the “CLIO” infrared facility. A two section undulator allows the production of picosecond laser pulses at two different wavelengths and simultaneously, in a wavelength range from to , and with a wavelength separation of two colours of up to . The time overlap, between both colours, has been measured on a picosecond time scale and on a microsecond time scale. An initial pump-probe application experiment has been performed with the two colours: stimulated emission has been measured in a 3-level Quantum-Well system. This is the best demonstration of the stability and reliability of the two-colour laser operation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100530050151
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  • 2
    Electronic Resource
    Electronic Resource
    Influence of oxygen on the biosynthesis of cellular fatty acids, sterols and phospholipids during alcoholic fermentation by Saccharomyces cerevisiae and Torulaspora delbrueckii (1998)
    Springer
    World journal of microbiology and biotechnology 14 (1998), S. 405-410 
    Details
    ISSN: 1573-0972
    Keywords: Ergosterol ; fatty acids ; phospholipids ; Saccharomyces cerevisiae ; Torulaspora delbrueckii ; wine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract Saccharomyces cerevisiae and Torulaspora delbrueckii were grown under different O2 availabilities on grape must. Oxygen requirements for the two yeasts were different: under anaerobic conditions, S. cerevisiae produced a higher percentage of unsaturated fatty acids, and had a greater cell yield and fermentation activity than T. delbrueckii. Addition of ergosterol (25mg/l) and oleic acid (31mg/l) caused total recovery of cellular growth and the fermentation activity of S. cerevisiae in anaerobiosis, but not of T. delbrueckii. However a short period of aeration to a 48 h culture in anaerobiosis, led to total recovery of the cellular growth and fermentation activity in both yeasts. Likewise, the effect of a short aeration period on unsaturated fatty acid biosynthesis was similar for both species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008873430077
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    Paper (German National Licenses)
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