Objective. Work demands for productivity and flexibility are on the rise. In the last 20 years. hourly productivity has increased by 20 % (OECD. https://olivebookmarks.com/story19598837/antibacterial-activity-of-selenium-nanoparticles-copper-oxide-senps-cuo-nanocomposite-against-some-multi-drug-resistant-clinical-pathogens