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Lévesque, Mathieu ; Saurer, Matthias ; Siegwolf, Rolf ; Eilmann, Britta ; Brang, Peter ; Bugmann, Harald ; Rigling, Andreas
Eilmann, Britta ; de Vries, Sven M. G. ; den Ouden, Jan ; Mohren, Godefridus M. J. ; Sauren, Pascal ; Sass-Klaassen, Ute G. W.
Kuhnert, Marie-Therese ; Bialonski, Stephan ; Noenning, Nina ; Mai, Heinke ; Hinrichs, Hermann ; Helmstaedter, Christoph ; Lehnertz, Klaus
Learning- and memory-related processes are thought to result from dynamic interactions in large-scale brain networks that include lateral and mesial structures of the temporal lobes. We investigate the impact of incidental and intentional learning of verbal episodic material on functional brain networks that we derive from scalp-EEG recorded continuously from 33 subjects during a neuropsychological test schedule. Analyzing the networks' global statistical properties we observe that intentional but not incidental learning leads to a significantly increased clustering coefficient, and the average shortest path length remains unaffected. Moreover, network modifications correlate with subsequent recall performance: the more pronounced the modifications of the clustering coefficient, the higher the recall performance. Our findings provide novel insights into the relationship between topological aspects of functional brain networks and higher cognitive functions.
Savitskaya, Irina S. ; Kistaubayeva, Aida S. ; Akimbekov, Nuraly S. ; Digel, Ilya ; Zhubanova, Azhar A.
The invention relates to a system for the implementation of chemical, biological or physical reactions, consisting of - one or more magnetic micro-reactors, each comprising a shell made of hydrophobic magnetic nanoparticles encapsulating an aqueous core, - a plane platform comprising a surface to receive the micro-reactors, - a source that generates a magnetic field above or underneath the platform for manipulating the one or more hydrophobic magnetic micro-reactors, or for moving them along the surface of the platform from one position to another position, characterized in that the aqueous core of the one or more magnetic micro-reactors contains a reaction solution or buffer, and wherein the magnetic field generated by the source correlates to a defined position on the surface of the platform.