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  • Ergosterol  (1)
  • PACS. 41.60.Cr Free-electron lasers[:AND:] 42.60.Fc Modulation, tuning, and mode locking  (1)
  • Springer  (2)
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  • Springer  (2)
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  • 1
    Digitale Medien
    Digitale Medien
    Springer
    The European physical journal 3 (1998), S. 87-93 
    ISSN: 1434-6079
    Schlagwort(e): PACS. 41.60.Cr Free-electron lasers[:AND:] 42.60.Fc Modulation, tuning, and mode locking
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: 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.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    ISSN: 1573-0972
    Schlagwort(e): Ergosterol ; fatty acids ; phospholipids ; Saccharomyces cerevisiae ; Torulaspora delbrueckii ; wine
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Notizen: 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.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
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