Abstract. On urbanized and industrial territories in Crimean region of Ukraine with exceedances of critical loads for heavy metals (HM) different cohorts of population were examined. Content of toxic HM (Hg, Pb, Cd, Ni) in hair of healthy children and adult mainly did not exceeded, but level of essential HM (Fe, Zn, Cu, Mn) frequently was decreased. The differences of HM content in some special cohorts (mental retardation, autonomic nervous system dysfunction, sportsman) was revealed. Content of HM in 375 samples of venous and umbilical cord blood, placenta, breast milk of puerperants and their new-born children strongly varied. Correlation analysis by Spearman and multiple regression analysis shown not so close but statistically significant relationships between levels of HM and functional state of central and autonomic nervous, immune and cardio-vascular systems, their different sensitivity to different HM in distinct cohorts of population.
Enterosorption is a cost-effective and efficient approach to reducing the impact of chronic exposure to heavy metals and radionuclides. As an auxiliary method to medical treatment, it can protect population chronically exposed to the intake of heavy metals or radioactivity due to industrial activities or in the aftermath of technogenic or natural accidents. This paper assesses the current state of the art in the treatment of acute and chronic heavy metal poisoning.
3D printing is the innovative technology widely used in all developed countries of the world and opens up significant potential for its application in various areas of human activity. The features of 3D objects creation using two the most commonly used additive manufacturing technologiesfused deposition modeling (FDM) and stereolithography version (SLA)-Digital Light Processing (DLP) are considered in this paper. By these technologies application the samples at various 3D printing modes using polylactide biopolymer (PLA) as consumable material are created and investigations of their geometry, structure, and mechanical properties (interlayer strength and elongation up to material rupture) are carried out. On the basis of the obtained results the influence of the specified print parameters, such as the extreme admissible values of 3D products layers thickness for FDM and DLP technologies, on the formed samples quality is investigated.
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