Mössbauer spectroscopy study in characterization of steel production dusts

Steel production involves processes and alloys based on iron. Metallurgy is one of the most energy-intensive branches of industry and it also generates a lot of damage. The aim of the research was to recognize magnetic properties, mineral composition, and phase content of dusts from a de-dusting station, steel mill, sinter strand and filter press located in a steel metallurgical foundry in Upper Silesia, the most urbanized, industrialized and also the most polluted region of Poland. The following methods were applied: X-ray fluorescence, X-ray diffraction and the Mössbauer spectroscopy measurements

A Prototype of a 3D Bioprinter

3D bioprinting is an innovative method of manufacturing three-dimensional tissue-like structures. The method is based on a layer-by-layer deposition of biocompatible materials successively forming a scaffold for living cells. The technology allows to fabricate complicated tissue morphology, including vascular-like networks. The range of potential applications of 3D bioprinting is immense: from drug testing, across regenerative medicine, to organ transplantation. In this paper, we describe a prototype of a 3D bioprinter utilizing gelatin methacrylate (GelMA) doped with a photoinitiator as the printing substance. Biological requirements for the material, its synthesis and application adequacy for the bioprinting process are discussed. Technical details of the mechanical construction of the bioprinter and its control system are presented