Concentration of carbon (C), oxygen (O), nitrogen (N), magnesium (Mg), aluminium (Al), silicon (Si), phosphorus (P), mercury (Hg), sulphur (S), lead (Pb), chlorine (Cl), potassium (K), cadmium (Cd), calcium (Ca), chromium (Cr), manganese (Mn), iron (Fe), cobalt (Co), copper (Cu) and zinc (Zn), in the form of weight percentage, in the needles of different age classes, current and previous year one, of two sites, Risnjak National Park and Donja Dobra (control), were measured by X-ray microanalysis (EDAX) in the Scanning Electron Microscope in silver fir trees (Abies alba Mill.). The analysis suggests that accumulation of elements, in both years, particularly that of heavy metals, appeared in polluted site, like Risnjak, in the higher amount, whereas in non polluted, like Donja Dobra, in the lower amount. Moreover, it seems likely that elements at the first sites were accumulated and contaminated in very young current year needles, while in non polluted in somewhat older, the previous year ones.
, protective clothing, electronics [ 1 ], sensors [ 2 ], drug delivery materials [ 3 , 4 ], composites [ 5 , 6 ], filters[ 7 ], etc.
Needle electrospinning is the oldest and the simplest electrospinning device, which is still commonly used in academia
The aerosols adhering to one year old spruce needles are investigated as for the mass deposited and as for the chemical composition. The method for the isolation of the material is presented. 33 elements are determined by neutron activation analysis. Precision, accuracy, sampling error and variation over 14 sites at the interior of woods are discussed. Chemical composition is compared to local topsoil and to local aerosols collected on filters.
Csák, R., Gyékiss, R., Márványkövi, F., et al.: Injecting mephedrone use in Hungary according to the experiences of needle exchange providers. [Magyarországi intravénás mefedronhasználat a tűcsere szolgáltatók