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Digitale Medien

Interaction between cytochrome c and the photosynthetic reaction center of purple bacteria: Behaviour at low temperature

Mathis, P. ; Ortega, J.M. ; Venturoli, G.

Amsterdam : Elsevier

Biochimie 76 (1994), S. 569-579

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ISSN: 0300-9084

Schlagwort(e): cytochrome c ; electron transfer ; low temperature ; photosynthesis ; reaction center ; reorganization energy

Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002

Thema: Biologie , Chemie und Pharmazie

Materialart: Digitale Medien

URL: http://linkinghub.elsevier.com/retrieve/pii/0300-9084(94)90181-3

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Digitale Medien

Two-colour operation of a Free-Electron Laser and applications in the mid-infrared (1998)

Prazeres, R. ; Glotin, F. ; Insa, C. ; [weitere]

Springer

The European physical journal 3 (1998), S. 87-93

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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

URL: http://dx.doi.org/10.1007/s100530050151

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Digitale Medien

Influence of oxygen on the biosynthesis of cellular fatty acids, sterols and phospholipids during alcoholic fermentation by Saccharomyces cerevisiae and Torulaspora delbrueckii (1998)

Mauricio, J.C. ; Millán, C. ; Ortega, J.M.

Springer

World journal of microbiology and biotechnology 14 (1998), S. 405-410

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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

URL: http://dx.doi.org/10.1023/A:1008873430077

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