While tubular retractor systems have been widely used for microsurgery of the spine in the past, sets of trocars which had originally been developed for endoscopic procedures have been introduced for these procedures recently. The disadvantage of using trocars within percutaneous access operations is that a trocar holder is needed for fixing and positioning the various trocars. An assistant surgeon has to fix the trocar holder manually which might cause problems due to minimal shifting of the trocar. In addition, the physician fixing the holder is limited in assisting the surgeon elsewhere.
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The miniaturization of the current technology of storage media is hindered by fundamental limits of quantum mechanics. A new approach consists in using so-called spin-crossover molecules as the smallest possible storage unit. Similar to normal hard drives, these special molecules can save information via their magnetic state. A research team from Kiel University has now managed to successfully place a new class of spin-crossover molecules onto a surface and to improve the molecule’s storage capacity. The storage density of conventional hard drives could therefore theoretically be increased by more than one hundred fold. The study has been published in the scientific journal Nano Letters.
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Scientists at the Institute of Science and Technology Austria (IST Austria) have managed to control the behavior of individual bacteria by connecting them to a...
Physicists in the Laboratory for Attosecond Physics (run jointly by LMU Munich and the Max Planck Institute for Quantum Optics) have developed an attosecond electron microscope that allows them to visualize the dispersion of light in time and space, and observe the motions of electrons in atoms.
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