The contents or Cd, Pb. Cu, Mn, Zn, Ni and Fe in different organs or Typha latifolia L., coming from six sites selected within Jezioro Wielkie (Leszczyńskie Lakeland in western Poland), were determined. Three groups or metals, cach with a different accumulation pattern within the plant were distinguished in this study. Pb, Zn and Cu were found to be the least mobile and shown the following accumulation scheme: roots> rhizomes> lower leave part> top leave part. 13y contrast, Mn, a metal which is both easily transported in plants and accumulated in green plant organs, exhibited the following accumulation scheme: roots> top leave part> lower leave part> rhizomes. Ni, Cd and re were accumulated by the cattail as follows: roots> rhizomes> top leaf part> lower leaf part. The fact that Tvpha tatifol io L. had the highest proportion 01· all the metals studied in its roots can suggest that some kind of protection barrier exists which prevents toxic compounds permeating from that part or this plant to its rhizomes and its aerial parts. The confirmation or this thesis requires some further research.

A powder-bed-based additive manufacturing process called electron beam melting (EBM) is defined by high temperature gradients during solidification, which produces an extremely fine microstructure compared to the traditional cast material. However, porosity and segregation defects are still present on a smaller scale which may lead to a reduction in mechanical properties. It is important to have a better knowledge of the influence of post-fabrication treatments on the microstructure and mechanical characteristics before the use of additive manufacturing parts in specific applications. In this study, the effects of solution heat treatment (SHT) and hot isostatic pressing (HIP) on the microstructure and mechanical properties of Ti-6Al-4V alloy fabricated by the EBM process have been investigated. The SHT and HIP treatments can significantly improve the ductility of EBM Ti-6Al-4V due to the coarsening of α laths and the formation of β grains.