Beate Wiedemann

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BACKGROUND Fermentation of lignocellulosic biomass is an attractive alternative for the production of bioethanol. Traditionally, the yeast Saccharomyces cerevisiae is used in industrial ethanol fermentations. However, S. cerevisiae is naturally not able to ferment the pentose sugars D-xylose and L-arabinose, which are present in high amounts in(More)
Beta-lactamase induction in Enterobacter cloacae, which is linked to peptidoglycan recycling, was investigated by high-performance liquid chromatographic analysis of cell wall fragments in genetically defined cells of Escherichia coli. After treatment of cells with beta-lactams, we detected an increase in a D-tripeptide (disaccharide-tripeptide,(More)
Penicillin-binding proteins (PBPs) are involved in the regulation of beta-lactamase expression by determining the level of anhydromuramylpeptides in the periplasmatic space. It was hypothesized that one or more PBPs act as a sensor in the beta-lactamase induction pathway. We have performed induction studies with Escherichia coli mutants lacking one to four(More)
In CBM open charm mesons will be identified by reconstructing their secondary decay vertices. This requires a vertex detector with very good secondary vertex resolution (σ SV ∼ 50 µm along the beam axis). To match this requirement , a highly granular pixel detector with excellent spatial resolution (∼ 5 µm) and minimum material budget (few 0.1 %X 0) will be(More)
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