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Ultra-fast photodetector and terahertz generator31.01.2012 - Extremely thin, more stable than steel and widely applicable: the material graphene is full of interesting properties. As such, it is currently the shining star among the electric conductors. Photodetectors made with graphene can process and conduct both light signals and electric signals extremely fast. Upon optical stimulation, graphene generates a photocurrent within picoseconds (0,000 000 000 001 second). Until now, none of the available methods were fast enough to measure these processes in graphene. Professor Alexander Holleitner and Dr. Leonhard Prechtel, scientists at the Technische Universitaet Muenchen (TUM), have now developed a method to measure the temporal dynamics of this photo current.
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Avalanche of reactions at the origin of life19.01.2012 - The origin of life is seen as the formation of the first biomolecules capable of multiplication and further development. Until now it was unclear which reactions may have triggered the evolution of this ur-metabolism. Scientists at the Technische Universitaet Muenchen (TUM) have now revealed mechanisms by which a few biomolecules may bring forth new products in a kind of avalanche to initiate a self-expanding metabolism. „Chemistry – A European Journal“ now published their results.
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Energy saving chaperone Hsp9012.01.2012 - A special group of proteins, the so-called chaperones, helps other proteins to obtain their correct conformation. Until now scientists supposed that hydrolyzing ATP provides the energy for the large conformational changes of chaperone Hsp90. Now a research team from the Nanosystems Initiative Munich (NIM) could prove that Hsp90 utilizes thermal fluctuations as the driving force for its conformational changes. The renowned journal PNAS reports on their findings.
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