Study of Potentially Toxic Elements Uptake into Organs of Quercus spp. from Copper Deposits in Slovakia, Italy and Portugal.

The article is focused on the application of Energy dispersive micro X-ray fluorescence spectroscopy as a specific method to determine the contents of potentially toxic elements and its spread in plant tissues. As a model species, Quercus spp. were selected.

Evolution of correlation structure of industrial indices of U.S. equity markets.

We investigate the dynamics of correlations present between pairs of industry indices of U.S. stocks traded in U.