Hans Zürrer

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Continuous photosynthetic production of hydrogen by Rhodospirillum rubrum in batch cultures was observed up to 80 days with the hydrogen donor, pure lactate or lactic acid-containing wastes, supplied periodically. Hydrogen was produced at an average rate of 6 ml/h per g (dry weight) of cells with whey as a hydrogen donor. In continuous cultures with(More)
The author is indebted to the Deutsche Forschungsgemeinschaft for financial support of his own research. 1 L.E. Mortenson and J.-S. Chen, in: Microbial Iron Metabolism, p.231. Ed. J.B. Neilands. Academic Press, New York 1974. 2 H.G. Schlegel and K. Schneider, in: Hydrogenases: Their Catalytic Activity, Structure and Function, p. 15. Ed. H.G. Schlegel and K.(More)
From enrichment cultures inoculated with water and sediments of a waste-water pond of a sugar refinery several photosynthetic nonsulphur bacteria have been isolated and tested for the ability to produce molecular hydrogen in the light. Strains have been found that utilize the freshly used, untreated waste substrate with higher yields than the laboratory(More)
Reaction centers were isolated with the detergent lauryl dimethyl amine oxide from chromatophore membranes of Rhodospirillum rubrum. The subunit composition of these reaction centers is similar to the one obtained from Rhodopseudomonas spheroides: three subunits with the molecular weights of 21 000, 24 000 and 29 000. Reaction centers prepared from(More)
Cells ofRhodospirillum rubrum have been immobilized in various gels and tested for photobiological hydrogen production. Agar proved to be the best immobilizing agent with respect to production rates as well as stability. Agar immobilized cells were also superior compared to liquid suspension cultures. Growth conditions of the cells prior to immobilization,(More)
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