Martin Winkler

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Clostridium acetobutylicum ATCC 824 was selected for the homologous overexpression of its Fe-only hydrogenase and for the heterologous expressions of the Chlamydomonas reinhardtii and Scenedesmus obliquus HydA1 Fe-only hydrogenases. The three Strep tag II-tagged Fe-only hydrogenases were isolated with high specific activities by two-step column(More)
In wireless networks formed of battery-powered nodes, energy consumption is a major concern. On the communication side, energy can be saved by switching transceivers to idle or power-down mode when not needed. To this end, duty cycling protocols located at MAC level have been devised. These protocols have in common that they define modified CSMA/CA schemes,(More)
Nature has developed an impressive repertoire of metal-based enzymes that perform complex chemical reactions under moderate conditions. Catalysts that produce molecular hydrogen (H2) are particularly promising for renewable energy applications. Unfortunately, natural and chemical H2-catalysts are often irreversibly degraded by molecular oxygen (O2). Here we(More)
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