- Category: Aura Ochrona Środowiska
- Hits: 9
- What connects the volcanic rocks of Vesuvius with Polish metallurgical heaps? How lichens cope in extreme conditions
Lichens are unique symbiotic organisms, consisting of two components: fungal hyphae and algae / cyanosis cells. Thanks to the symbiosis, they have gained many unique properties not found in other organisms, which allow them to function in extremely unfavorable environmental conditions. The described species of lichens, incl. the barbed wireworm and the brown-black roller coaster occur in such extreme habitats as the volcanic rocks of Vesuvius or the smelting dumps heavily contaminated with heavy metals in Poland. Slag heaps related to the processing of zinc and lead ores are an excellent substitute habitat and can be a specific refugium (refuge) for rare lichen species.
- Assessment of ancestral variability of Norway spruce from the Silesian Beskids
The subject of the work is the assessment of the ancestral variability of Norway spruce. The aim of the research was to investigate the phenotypic variability of morphological and incremental traits, as well as to determine its plasticity, i.e. its adaptation to climatic conditions. The study used empirical data from two research plots in Krynica and Wisła. 22-year-old spruces were examined on the conservation plots. The obtained measurements were compiled in an excel sheet in order to create a database necessary for calculations. Calculations of average height, DBH, survival and frost resistance were performed. On the basis of the obtained results, conclusions were drawn. The best offspring of the following families were assessed: 5210, 85, 5218, 5198 Zapowiedź, 2949 Malinka, and the biologically weakest 5208 and 5213.
- COP-26 in Glasgow
The conference of the signatories of the Climate Convention in 2021 should clarify some provisions of the Paris Agreement of 2015, in particular its Articles 6 and 8. Some threatening "clarifications" were avoided, which would be particularly harmful to the climate, but - under the pressure of several signatories - provisions were introduced that hinder efforts to protect it. Above all, however, the Conference confirmed that the road to climate protection is still very long and that there are few countries that are ready to take seriously global threats.
- Construction of the 3rd generation PV cell made of amorphous silicon (a-Si) in the TOPCon technology
Construction of the device These cells no longer have a classic pn junction, but a silicon heterojunction (thin-film technology). By diffusing phosphorus into the thin layer of the silicon wafer, a free electron was obtained on the valence coating of the silicon semiconductor (negative charge). By admixing the thin layer (nano-layer) of amorphous silicon with boron (B), an excess of holes was obtained on the valence coating of the silicon semiconductor (positive charge). Thin n (wafer) and p-silicon nano-layers (polycrystalline silicon doped with boron), superimposed on each other, form the pn junction. Thanks to the described process, a highly efficient tunnel solar cell was created.